//
// Copyright 2020 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// VulkanPerformanceCounterTest:
//   Validates specific GL call patterns with ANGLE performance counters.
//   For example we can verify a certain call set doesn't break the RenderPass.

#include "test_utils/ANGLETest.h"
#include "test_utils/angle_test_instantiate.h"
// 'None' is defined as 'struct None {};' in
// third_party/googletest/src/googletest/include/gtest/internal/gtest-type-util.h.
// But 'None' is also defined as a numeric constant 0L in <X11/X.h>.
// So we need to include ANGLETest.h first to avoid this conflict.

#include "include/platform/Feature.h"
#include "test_utils/gl_raii.h"
#include "util/random_utils.h"
#include "util/shader_utils.h"

using namespace angle;

namespace
{
enum class ANGLEFeature
{
    Supported,
    Unsupported,
    Unknown,
};

class VulkanPerformanceCounterTest : public ANGLETest
{
  protected:
    VulkanPerformanceCounterTest()
        : mLoadOpNoneSupport(ANGLEFeature::Unknown),
          mStoreOpNoneSupport(ANGLEFeature::Unknown),
          mPreferDrawOverClearAttachments(ANGLEFeature::Unknown)
    {
        // Depth/Stencil required for SwapShouldInvalidate*.
        // Also RGBA8 is required to avoid the clear for emulated alpha.
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
        setConfigDepthBits(24);
        setConfigStencilBits(8);
    }

    static constexpr GLsizei kOpsTestSize = 16;

    void initANGLEFeatures()
    {
        const bool hasANGLEFeatureControl =
            IsEGLClientExtensionEnabled("EGL_ANGLE_feature_control");
        if (!hasANGLEFeatureControl)
        {
            return;
        }

        EGLDisplay display = getEGLWindow()->getDisplay();

        EGLAttrib featureCount = -1;
        ASSERT_EQ(static_cast<EGLBoolean>(EGL_TRUE),
                  eglQueryDisplayAttribANGLE(display, EGL_FEATURE_COUNT_ANGLE, &featureCount));

        for (EGLAttrib index = 0; index < featureCount; index++)
        {
            const char *featureName = eglQueryStringiANGLE(display, EGL_FEATURE_NAME_ANGLE, index);
            const char *featureStatus =
                eglQueryStringiANGLE(display, EGL_FEATURE_STATUS_ANGLE, index);
            ASSERT_NE(featureName, nullptr);
            ASSERT_NE(featureStatus, nullptr);

            const bool isStoreOpNone =
                strcmp(featureName, GetFeatureName(Feature::SupportsRenderPassStoreOpNone)) == 0;
            const bool isLoadStoreOpNoneEXT =
                strcmp(featureName, GetFeatureName(Feature::SupportsRenderPassLoadStoreOpNone)) ==
                0;
            const bool isEnabled  = strcmp(featureStatus, angle::kFeatureStatusEnabled) == 0;
            const bool isDisabled = strcmp(featureStatus, angle::kFeatureStatusDisabled) == 0;
            ASSERT_TRUE(isEnabled || isDisabled);
            const ANGLEFeature isSupported =
                isEnabled ? ANGLEFeature::Supported : ANGLEFeature::Unsupported;

            if (isLoadStoreOpNoneEXT)
            {
                mLoadOpNoneSupport = isSupported;
            }

            if (isStoreOpNone || isLoadStoreOpNoneEXT)
            {
                if (mStoreOpNoneSupport == ANGLEFeature::Unknown ||
                    mStoreOpNoneSupport == ANGLEFeature::Unsupported)
                {
                    mStoreOpNoneSupport = isSupported;
                }
            }

            if (strcmp(featureName,
                       GetFeatureName(Feature::PreferDrawClearOverVkCmdClearAttachments)) == 0)
            {
                mPreferDrawOverClearAttachments = isSupported;
            }
        }

        // Make sure feature renames are caught
        ASSERT_NE(mLoadOpNoneSupport, ANGLEFeature::Unknown);
        ASSERT_NE(mStoreOpNoneSupport, ANGLEFeature::Unknown);
        ASSERT_NE(mPreferDrawOverClearAttachments, ANGLEFeature::Unknown);

        // Impossible to have LOAD_OP_NONE but not STORE_OP_NONE
        ASSERT_FALSE(mLoadOpNoneSupport == ANGLEFeature::Supported &&
                     mStoreOpNoneSupport != ANGLEFeature::Supported);
    }

    void setupForColorOpsTest(GLFramebuffer *framebuffer, GLTexture *texture)
    {
        // Setup the framebuffer
        glBindFramebuffer(GL_FRAMEBUFFER, *framebuffer);
        glBindTexture(GL_TEXTURE_2D, *texture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kOpsTestSize, kOpsTestSize, 0, GL_RGBA,
                     GL_UNSIGNED_BYTE, nullptr);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, *texture, 0);
        ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    }

    void setupForColorDepthOpsTest(GLFramebuffer *framebuffer,
                                   GLTexture *texture,
                                   GLRenderbuffer *renderbuffer)
    {
        // Setup color and depth
        glBindFramebuffer(GL_FRAMEBUFFER, *framebuffer);
        glBindTexture(GL_TEXTURE_2D, *texture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kOpsTestSize, kOpsTestSize, 0, GL_RGBA,
                     GL_UNSIGNED_BYTE, nullptr);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, *texture, 0);
        glBindRenderbuffer(GL_RENDERBUFFER, *renderbuffer);
        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, kOpsTestSize, kOpsTestSize);
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
                                  *renderbuffer);
        ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

        // Setup depth parameters
        glEnable(GL_DEPTH_TEST);
        glDepthMask(GL_TRUE);
        glDepthFunc(GL_GEQUAL);
        glClearDepthf(0.99f);
        glViewport(0, 0, kOpsTestSize, kOpsTestSize);
        ASSERT_GL_NO_ERROR();
    }

    void setupForDepthStencilOpsTest(GLFramebuffer *framebuffer,
                                     GLTexture *texture,
                                     GLRenderbuffer *renderbuffer)
    {
        // Setup color, depth, and stencil
        glBindFramebuffer(GL_FRAMEBUFFER, *framebuffer);
        glBindTexture(GL_TEXTURE_2D, *texture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kOpsTestSize, kOpsTestSize, 0, GL_RGBA,
                     GL_UNSIGNED_BYTE, nullptr);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, *texture, 0);
        glBindRenderbuffer(GL_RENDERBUFFER, *renderbuffer);
        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, kOpsTestSize, kOpsTestSize);
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                                  *renderbuffer);
        ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

        // Setup depth parameters
        glEnable(GL_DEPTH_TEST);
        glDepthMask(GL_TRUE);
        glDepthFunc(GL_GEQUAL);
        glEnable(GL_STENCIL_TEST);
        glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
        glStencilMask(0xFF);
        glClearDepthf(0.99f);
        glClearStencil(0xAA);
        glViewport(0, 0, kOpsTestSize, kOpsTestSize);
        ASSERT_GL_NO_ERROR();
    }

    void setupClearAndDrawForDepthStencilOpsTest(GLProgram *program,
                                                 GLFramebuffer *framebuffer,
                                                 GLTexture *texture,
                                                 GLRenderbuffer *renderbuffer,
                                                 bool clearStencil)
    {
        setupForDepthStencilOpsTest(framebuffer, texture, renderbuffer);

        // Clear and draw with depth and stencil buffer enabled
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
                (clearStencil ? GL_STENCIL_BUFFER_BIT : 0));
        drawQuad(*program, essl1_shaders::PositionAttrib(), 1.f);
        ASSERT_GL_NO_ERROR();
    }

    void setExpectedCountersForDepthOps(const angle::VulkanPerfCounters &counters,
                                        uint32_t incrementalRenderPasses,
                                        uint32_t incrementalDepthLoadOpClears,
                                        uint32_t incrementalDepthLoadOpLoads,
                                        uint32_t incrementalDepthLoadOpNones,
                                        uint32_t incrementalDepthStoreOpStores,
                                        uint32_t incrementalDepthStoreOpNones,
                                        angle::VulkanPerfCounters *expected)
    {
        expected->renderPasses       = counters.renderPasses + incrementalRenderPasses;
        expected->depthLoadOpClears  = counters.depthLoadOpClears + incrementalDepthLoadOpClears;
        expected->depthLoadOpLoads   = counters.depthLoadOpLoads + incrementalDepthLoadOpLoads;
        expected->depthLoadOpNones   = counters.depthLoadOpNones + incrementalDepthLoadOpNones;
        expected->depthStoreOpStores = counters.depthStoreOpStores + incrementalDepthStoreOpStores;
        expected->depthStoreOpNones  = counters.depthStoreOpNones + incrementalDepthStoreOpNones;
    }

    void setExpectedCountersForStencilOps(const angle::VulkanPerfCounters &counters,
                                          uint32_t incrementalStencilLoadOpClears,
                                          uint32_t incrementalStencilLoadOpLoads,
                                          uint32_t incrementalStencilLoadOpNones,
                                          uint32_t incrementalStencilStoreOpStores,
                                          uint32_t incrementalStencilStoreOpNones,
                                          angle::VulkanPerfCounters *expected)
    {
        expected->stencilLoadOpClears =
            counters.stencilLoadOpClears + incrementalStencilLoadOpClears;
        expected->stencilLoadOpLoads = counters.stencilLoadOpLoads + incrementalStencilLoadOpLoads;
        expected->stencilLoadOpNones = counters.stencilLoadOpNones + incrementalStencilLoadOpNones;
        expected->stencilStoreOpStores =
            counters.stencilStoreOpStores + incrementalStencilStoreOpStores;
        expected->stencilStoreOpNones =
            counters.stencilStoreOpNones + incrementalStencilStoreOpNones;
    }

    void setExpectedCountersForColorOps(const angle::VulkanPerfCounters &counters,
                                        uint32_t incrementalRenderPasses,
                                        uint32_t incrementalColorLoadOpClears,
                                        uint32_t incrementalColorLoadOpLoads,
                                        uint32_t incrementalColorLoadOpNones,
                                        uint32_t incrementalColorStoreOpStores,
                                        uint32_t incrementalColorStoreOpNones,
                                        angle::VulkanPerfCounters *expected)
    {
        expected->renderPasses       = counters.renderPasses + incrementalRenderPasses;
        expected->colorLoadOpClears  = counters.colorLoadOpClears + incrementalColorLoadOpClears;
        expected->colorLoadOpLoads   = counters.colorLoadOpLoads + incrementalColorLoadOpLoads;
        expected->colorLoadOpNones   = counters.colorLoadOpNones + incrementalColorLoadOpNones;
        expected->colorStoreOpStores = counters.colorStoreOpStores + incrementalColorStoreOpStores;
        expected->colorStoreOpNones  = counters.colorStoreOpNones + incrementalColorStoreOpNones;
    }

    // Normally, if LOAD_OP_NONE is not supported, LOAD_OP_LOAD is used instead.  Similarly, if
    // STORE_OP_NONE is not supported, STORE_OP_STORE is used instead.
    //
    // If an attachment has undefined contents and is unused, LOAD_OP_DONT_CARE and
    // STORE_OP_DONT_CARE can be used.  However, these are write operations for synchronization
    // purposes, and so ANGLE uses LOAD_OP_NONE and STORE_OP_NONE if available to avoid the
    // synchronization.  When NONE is not available, ANGLE foregoes synchronization, producing
    // syncval errors.
    //
    // For the sake of validation, it's unknown if NONE is turned into LOAD/STORE or DONT_CARE.  So
    // validation allows variations there.
    void compareOpLoadAndNone(uint32_t expectedLoads,
                              uint32_t actualLoads,
                              uint32_t expectedNones,
                              uint32_t actualNones)
    {
        if (mLoadOpNoneSupport == ANGLEFeature::Supported)
        {
            EXPECT_EQ(expectedLoads, actualLoads);
            EXPECT_EQ(expectedNones, actualNones);
        }
        else
        {
            EXPECT_EQ(actualNones, 0u);
            EXPECT_LE(expectedLoads, actualLoads);
            EXPECT_GE(expectedLoads + expectedNones, actualLoads);
        }
    }
    void compareOpStoreAndNone(uint32_t expectedStores,
                               uint32_t actualStores,
                               uint32_t expectedNones,
                               uint32_t actualNones)
    {
        if (mStoreOpNoneSupport == ANGLEFeature::Supported &&
            mLoadOpNoneSupport == ANGLEFeature::Supported)
        {
            EXPECT_EQ(expectedStores, actualStores);
            EXPECT_EQ(expectedNones, actualNones);
        }
        else
        {
            if (mStoreOpNoneSupport != ANGLEFeature::Supported)
            {
                EXPECT_EQ(actualNones, 0u);
            }
            EXPECT_LE(expectedStores, actualStores);
            EXPECT_GE(expectedStores + expectedNones, actualStores + actualNones);
        }
    }

    void compareDepthOpCounters(const angle::VulkanPerfCounters &counters,
                                const angle::VulkanPerfCounters &expected)
    {
        EXPECT_EQ(expected.depthLoadOpClears, counters.depthLoadOpClears);
        compareOpLoadAndNone(expected.depthLoadOpLoads, counters.depthLoadOpLoads,
                             expected.depthLoadOpNones, counters.depthLoadOpNones);
        compareOpStoreAndNone(expected.depthStoreOpStores, counters.depthStoreOpStores,
                              expected.depthStoreOpNones, counters.depthStoreOpNones);
    }

    void compareStencilOpCounters(const angle::VulkanPerfCounters &counters,
                                  const angle::VulkanPerfCounters &expected)
    {
        EXPECT_EQ(expected.stencilLoadOpClears, counters.stencilLoadOpClears);
        compareOpLoadAndNone(expected.stencilLoadOpLoads, counters.stencilLoadOpLoads,
                             expected.stencilLoadOpNones, counters.stencilLoadOpNones);
        compareOpStoreAndNone(expected.stencilStoreOpStores, counters.stencilStoreOpStores,
                              expected.stencilStoreOpNones, counters.stencilStoreOpNones);
    }

    void compareDepthStencilOpCounters(const angle::VulkanPerfCounters &counters,
                                       const angle::VulkanPerfCounters &expected)
    {
        compareDepthOpCounters(counters, expected);
        compareStencilOpCounters(counters, expected);
    }

    void compareColorOpCounters(const angle::VulkanPerfCounters &counters,
                                const angle::VulkanPerfCounters &expected)
    {
        EXPECT_EQ(expected.colorLoadOpClears, counters.colorLoadOpClears);
        compareOpLoadAndNone(expected.colorLoadOpLoads, counters.colorLoadOpLoads,
                             expected.colorLoadOpNones, counters.colorLoadOpNones);
        compareOpStoreAndNone(expected.colorStoreOpStores, counters.colorStoreOpStores,
                              expected.colorStoreOpNones, counters.colorStoreOpNones);
    }

    void setAndIncrementDepthStencilLoadCountersForOpsTest(
        const angle::VulkanPerfCounters &counters,
        uint32_t incrementalDepthLoadOpLoads,
        uint32_t incrementalStencilLoadOpLoads,
        angle::VulkanPerfCounters *expected)
    {
        expected->depthLoadOpLoads   = counters.depthLoadOpLoads + incrementalDepthLoadOpLoads;
        expected->stencilLoadOpLoads = counters.stencilLoadOpLoads + incrementalStencilLoadOpLoads;
    }

    void compareDepthStencilLoadOpCounters(const angle::VulkanPerfCounters &counters,
                                           const angle::VulkanPerfCounters &expected)
    {
        EXPECT_EQ(expected.depthLoadOpLoads, counters.depthLoadOpLoads);
        EXPECT_EQ(expected.stencilLoadOpLoads, counters.stencilLoadOpLoads);
    }

    void setExpectedCountersForUnresolveResolveTest(const angle::VulkanPerfCounters &counters,
                                                    uint32_t incrementalColorAttachmentUnresolves,
                                                    uint32_t incrementalDepthAttachmentUnresolves,
                                                    uint32_t incrementalStencilAttachmentUnresolves,
                                                    uint32_t incrementalColorAttachmentResolves,
                                                    uint32_t incrementalDepthAttachmentResolves,
                                                    uint32_t incrementalStencilAttachmentResolves,
                                                    angle::VulkanPerfCounters *expected)
    {
        expected->colorAttachmentUnresolves =
            counters.colorAttachmentUnresolves + incrementalColorAttachmentUnresolves;
        expected->depthAttachmentUnresolves =
            counters.depthAttachmentUnresolves + incrementalDepthAttachmentUnresolves;
        expected->stencilAttachmentUnresolves =
            counters.stencilAttachmentUnresolves + incrementalStencilAttachmentUnresolves;
        expected->colorAttachmentResolves =
            counters.colorAttachmentResolves + incrementalColorAttachmentResolves;
        expected->depthAttachmentResolves =
            counters.depthAttachmentResolves + incrementalDepthAttachmentResolves;
        expected->stencilAttachmentResolves =
            counters.stencilAttachmentResolves + incrementalStencilAttachmentResolves;
    }

    void compareCountersForUnresolveResolveTest(const angle::VulkanPerfCounters &counters,
                                                const angle::VulkanPerfCounters &expected)
    {
        EXPECT_EQ(expected.colorAttachmentUnresolves, counters.colorAttachmentUnresolves);
        EXPECT_EQ(expected.depthAttachmentUnresolves, counters.depthAttachmentUnresolves);
        if (counters.stencilAttachmentUnresolves != 0)
        {
            // Allow stencil unresolves to be 0.  If VK_EXT_shader_stencil_export is not supported,
            // stencil unresolve is impossible.
            EXPECT_EQ(expected.stencilAttachmentUnresolves, counters.stencilAttachmentUnresolves);
        }
        EXPECT_EQ(expected.colorAttachmentResolves, counters.colorAttachmentResolves);
        EXPECT_EQ(expected.depthAttachmentResolves, counters.depthAttachmentResolves);
        EXPECT_EQ(expected.stencilAttachmentResolves, counters.stencilAttachmentResolves);
    }

    void compareClearAttachmentsCounter(uint32_t expected, uint32_t actual)
    {
        if (mPreferDrawOverClearAttachments == ANGLEFeature::Supported)
        {
            EXPECT_EQ(actual, 0u);
        }
        else
        {
            EXPECT_EQ(actual, expected);
        }
    }

    void maskedFramebufferFetchDraw(const GLColor &clearColor, GLBuffer &buffer);
    void maskedFramebufferFetchDrawVerify(const GLColor &expectedColor, GLBuffer &buffer);

    angle::VulkanPerfCounters getPerfCounters()
    {
        if (mIndexMap.empty())
        {
            mIndexMap = BuildCounterNameToIndexMap();
        }

        return GetPerfCounters(mIndexMap);
    }

    CounterNameToIndexMap mIndexMap;

    // Support status for ANGLE features.
    ANGLEFeature mLoadOpNoneSupport;
    ANGLEFeature mStoreOpNoneSupport;
    ANGLEFeature mPreferDrawOverClearAttachments;
};

class VulkanPerformanceCounterTest_ES31 : public VulkanPerformanceCounterTest
{};

class VulkanPerformanceCounterTest_MSAA : public VulkanPerformanceCounterTest
{
  protected:
    VulkanPerformanceCounterTest_MSAA() : VulkanPerformanceCounterTest()
    {
        setSamples(4);
        setMultisampleEnabled(true);
    }
};

class VulkanPerformanceCounterTest_SingleBuffer : public VulkanPerformanceCounterTest
{
  protected:
    VulkanPerformanceCounterTest_SingleBuffer() : VulkanPerformanceCounterTest()
    {
        setMutableRenderBuffer(true);
    }
};

void VulkanPerformanceCounterTest::maskedFramebufferFetchDraw(const GLColor &clearColor,
                                                              GLBuffer &buffer)
{
    // Initialize the color buffer
    angle::Vector4 clearAsVec4 = clearColor.toNormalizedVector();
    glClearColor(clearAsVec4[0], clearAsVec4[1], clearAsVec4[2], clearAsVec4[3]);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_NEAR(0, 0, clearColor, 1);

    // Create output buffer
    constexpr GLsizei kBufferSize = kOpsTestSize * kOpsTestSize * sizeof(float[4]);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, buffer);
    glBufferData(GL_SHADER_STORAGE_BUFFER, kBufferSize, nullptr, GL_STATIC_DRAW);
    glBindBufferRange(GL_SHADER_STORAGE_BUFFER, 0, buffer, 0, kBufferSize);

    // Zero-initialize it
    void *bufferData = glMapBufferRange(
        GL_SHADER_STORAGE_BUFFER, 0, kBufferSize,
        GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT | GL_MAP_UNSYNCHRONIZED_BIT);
    memset(bufferData, 0, kBufferSize);
    glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);

    // Mask color output
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

    static constexpr char kVS[] = R"(#version 310 es
in highp vec4 a_position;

void main (void)
{
    gl_Position = a_position;
})";

    static constexpr char kFS[] = R"(#version 310 es
#extension GL_EXT_shader_framebuffer_fetch_non_coherent : require
layout(noncoherent, location = 0) inout highp vec4 o_color;

layout(std140, binding = 0) buffer outBlock {
    highp vec4 data[256];
};

uniform highp vec4 u_color;
void main (void)
{
    uint index = uint(gl_FragCoord.y) * 16u + uint(gl_FragCoord.x);
    data[index] = o_color;
    o_color += u_color;
})";

    // Draw
    ANGLE_GL_PROGRAM(program, kVS, kFS);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
}

void VulkanPerformanceCounterTest::maskedFramebufferFetchDrawVerify(const GLColor &expectedColor,
                                                                    GLBuffer &buffer)
{
    angle::Vector4 expectedAsVec4 = expectedColor.toNormalizedVector();

    // Read back the storage buffer and make sure framebuffer fetch worked as intended despite
    // masked color.
    glMemoryBarrier(GL_BUFFER_UPDATE_BARRIER_BIT);

    constexpr GLsizei kBufferSize = kOpsTestSize * kOpsTestSize * sizeof(float[4]);
    const float *colorData        = static_cast<const float *>(
        glMapBufferRange(GL_SHADER_STORAGE_BUFFER, 0, kBufferSize, GL_MAP_READ_BIT));
    for (uint32_t y = 0; y < kOpsTestSize; ++y)
    {
        for (uint32_t x = 0; x < kOpsTestSize; ++x)
        {
            uint32_t ssboIndex = (y * kOpsTestSize + x) * 4;
            EXPECT_NEAR(colorData[ssboIndex + 0], expectedAsVec4[0], 0.05);
            EXPECT_NEAR(colorData[ssboIndex + 1], expectedAsVec4[1], 0.05);
            EXPECT_NEAR(colorData[ssboIndex + 2], expectedAsVec4[2], 0.05);
            EXPECT_NEAR(colorData[ssboIndex + 3], expectedAsVec4[3], 0.05);
        }
    }
    glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
}

// Tests that texture updates to unused textures don't break the RP.
TEST_P(VulkanPerformanceCounterTest, NewTextureDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    GLColor kInitialData[4] = {GLColor::red, GLColor::blue, GLColor::green, GLColor::yellow};

    // Step 1: Set up a simple 2D Texture rendering loop.
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, kInitialData);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    auto quadVerts = GetQuadVertices();

    GLBuffer vertexBuffer;
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, quadVerts.size() * sizeof(quadVerts[0]), quadVerts.data(),
                 GL_STATIC_DRAW);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());
    glUseProgram(program);

    GLint posLoc = glGetAttribLocation(program, essl1_shaders::PositionAttrib());
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);
    ASSERT_GL_NO_ERROR();

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses;

    // Step 2: Introduce a new 2D Texture with the same Program and Framebuffer.
    GLTexture newTexture;
    glBindTexture(GL_TEXTURE_2D, newTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, kInitialData);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Tests that submitting the outside command buffer due to texture upload size does not break the
// current render pass.
TEST_P(VulkanPerformanceCounterTest, SubmittingOutsideCommandBufferDoesNotBreakRenderPass)
{
    initANGLEFeatures();
    // http://anglebug.com/6354

    size_t kMaxBufferToImageCopySize     = 64 * 1024 * 1024;
    uint32_t kNumSubmits                 = 2;
    uint32_t expectedRenderPassCount     = getPerfCounters().renderPasses + 1;
    uint32_t expectedSubmitCommandsCount = getPerfCounters().vkQueueSubmitCallsTotal + kNumSubmits;

    // Step 1: Set up a simple 2D texture.
    GLTexture texture;
    GLsizei texDim         = 256;
    uint32_t pixelSizeRGBA = 4;
    uint32_t textureSize   = texDim * texDim * pixelSizeRGBA;
    std::vector<GLColor> kInitialData(texDim * texDim, GLColor::green);

    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texDim, texDim, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                 kInitialData.data());
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    auto quadVerts = GetQuadVertices();

    GLBuffer vertexBuffer;
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, quadVerts.size() * sizeof(quadVerts[0]), quadVerts.data(),
                 GL_STATIC_DRAW);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());
    glUseProgram(program);

    GLint posLoc = glGetAttribLocation(program, essl1_shaders::PositionAttrib());
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);
    ASSERT_GL_NO_ERROR();

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Step 2: Load a new 2D Texture multiple times with the same Program and Framebuffer. The total
    // size of the loaded textures must exceed the threshold to submit the outside command buffer.
    auto maxLoadCount =
        static_cast<size_t>((kMaxBufferToImageCopySize / textureSize) * kNumSubmits + 1);
    for (size_t loadCount = 0; loadCount < maxLoadCount; loadCount++)
    {
        GLTexture newTexture;
        glBindTexture(GL_TEXTURE_2D, newTexture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texDim, texDim, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     kInitialData.data());
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

        glDrawArrays(GL_TRIANGLES, 0, 6);
        ASSERT_GL_NO_ERROR();
    }

    // Verify render pass and submitted frame counts.
    EXPECT_EQ(getPerfCounters().renderPasses, expectedRenderPassCount);
    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedSubmitCommandsCount);
}

// Tests that RGB texture should not break renderpass.
TEST_P(VulkanPerformanceCounterTest, SampleFromRGBTextureDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());
    glUseProgram(program);
    GLint textureLoc = glGetUniformLocation(program, essl1_shaders::Texture2DUniform());
    ASSERT_NE(-1, textureLoc);

    GLTexture textureRGBA;
    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, textureRGBA);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    GLTexture textureRGB;
    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, textureRGB);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 2, 2, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // First draw with textureRGBA which should start the renderpass
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glUniform1i(textureLoc, 0);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Next draw with textureRGB which should not end the renderpass
    glUniform1i(textureLoc, 1);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Tests that RGB texture should not break renderpass.
TEST_P(VulkanPerformanceCounterTest, RenderToRGBTextureDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Passthrough(), essl1_shaders::fs::UniformColor());
    glUseProgram(program);
    GLint colorUniformLocation =
        glGetUniformLocation(program, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(-1, colorUniformLocation);
    ASSERT_GL_NO_ERROR();

    GLTexture textureRGB;
    glActiveTexture(GL_TEXTURE1);
    glBindTexture(GL_TEXTURE_2D, textureRGB);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 256, 256, 0, GL_RGB, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureRGB, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // Draw into FBO
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);  // clear to green
    glClear(GL_COLOR_BUFFER_BIT);
    glViewport(0, 0, 256, 256);
    glUniform4fv(colorUniformLocation, 1, GLColor::blue.toNormalizedVector().data());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Tests that changing a Texture's max level hits the descriptor set cache.
TEST_P(VulkanPerformanceCounterTest, ChangingMaxLevelHitsDescriptorCache)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    GLColor kInitialData[4] = {GLColor::red, GLColor::blue, GLColor::green, GLColor::yellow};

    // Step 1: Set up a simple mipped 2D Texture rendering loop.
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, kInitialData);
    glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, kInitialData);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);

    auto quadVerts = GetQuadVertices();

    GLBuffer vertexBuffer;
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, quadVerts.size() * sizeof(quadVerts[0]), quadVerts.data(),
                 GL_STATIC_DRAW);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());
    glUseProgram(program);

    GLint posLoc = glGetAttribLocation(program, essl1_shaders::PositionAttrib());
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);
    ASSERT_GL_NO_ERROR();

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Step 2: Change max level and draw.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedWriteDescriptorSetCount = getPerfCounters().writeDescriptorSets;

    // Step 3: Change max level back to original value and verify we hit the cache.
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t actualWriteDescriptorSetCount = getPerfCounters().writeDescriptorSets;
    EXPECT_EQ(expectedWriteDescriptorSetCount, actualWriteDescriptorSetCount);
}

// Tests that two glCopyBufferSubData commands can share a barrier.
TEST_P(VulkanPerformanceCounterTest, IndependentBufferCopiesShareSingleBarrier)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr GLint srcDataA[] = {1, 2, 3, 4};
    constexpr GLint srcDataB[] = {5, 6, 7, 8};

    // Step 1: Set up four buffers for two copies.
    GLBuffer srcA;
    glBindBuffer(GL_COPY_READ_BUFFER, srcA);
    // Note: We can't use GL_STATIC_COPY. Using STATIC will cause driver to allocate a host
    // invisible memory and issue a copyToBuffer, which will trigger outsideRenderPassCommandBuffer
    // flush when glCopyBufferSubData is called due to read after write. That will break the
    // expectations and cause test to fail.
    glBufferData(GL_COPY_READ_BUFFER, sizeof(srcDataA), srcDataA, GL_DYNAMIC_COPY);

    GLBuffer dstA;
    glBindBuffer(GL_COPY_WRITE_BUFFER, dstA);
    // Note: We can't use GL_STATIC_COPY. Using STATIC will cause driver to allocate a host
    // invisible memory and issue a copyToBuffer, which will trigger outsideRenderPassCommandBuffer
    // flush when glCopyBufferSubData is called due to write after write. That will break the
    // expectations and cause test to fail.
    glBufferData(GL_COPY_WRITE_BUFFER, sizeof(srcDataA[0]) * 2, nullptr, GL_DYNAMIC_COPY);

    GLBuffer srcB;
    glBindBuffer(GL_COPY_READ_BUFFER, srcB);
    glBufferData(GL_COPY_READ_BUFFER, sizeof(srcDataB), srcDataB, GL_DYNAMIC_COPY);

    GLBuffer dstB;
    glBindBuffer(GL_COPY_WRITE_BUFFER, dstB);
    glBufferData(GL_COPY_WRITE_BUFFER, sizeof(srcDataB[0]) * 2, nullptr, GL_DYNAMIC_COPY);

    // We expect that ANGLE generate zero additional command buffers.
    uint32_t expectedFlushCount = getPerfCounters().flushedOutsideRenderPassCommandBuffers;

    // Step 2: Do the two copies.
    glBindBuffer(GL_COPY_READ_BUFFER, srcA);
    glBindBuffer(GL_COPY_WRITE_BUFFER, dstA);
    glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, sizeof(srcDataB[0]), 0,
                        sizeof(srcDataA[0]) * 2);

    glBindBuffer(GL_COPY_READ_BUFFER, srcB);
    glBindBuffer(GL_COPY_WRITE_BUFFER, dstB);
    glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, sizeof(srcDataB[0]), 0,
                        sizeof(srcDataB[0]) * 2);

    ASSERT_GL_NO_ERROR();

    uint32_t actualFlushCount = getPerfCounters().flushedOutsideRenderPassCommandBuffers;
    EXPECT_EQ(expectedFlushCount, actualFlushCount);
}

// Test resolving a multisampled texture with blit doesn't break the render pass so a subpass can be
// used
TEST_P(VulkanPerformanceCounterTest_ES31, MultisampleResolveWithBlit)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr int kSize = 16;
    glViewport(0, 0, kSize, kSize);

    GLFramebuffer msaaFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, msaaFBO.get());

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, texture.get());
    glTexStorage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 4, GL_RGBA8, kSize, kSize, false);
    ASSERT_GL_NO_ERROR();
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE,
                           texture.get(), 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    ANGLE_GL_PROGRAM(gradientProgram, essl31_shaders::vs::Passthrough(),
                     essl31_shaders::fs::RedGreenGradient());
    drawQuad(gradientProgram, essl31_shaders::PositionAttrib(), 0.5f, 1.0f, true);
    ASSERT_GL_NO_ERROR();

    // Create another FBO to resolve the multisample buffer into.
    GLTexture resolveTexture;
    GLFramebuffer resolveFBO;
    glBindTexture(GL_TEXTURE_2D, resolveTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glBindFramebuffer(GL_FRAMEBUFFER, resolveFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, resolveTexture, 0);
    EXPECT_GLENUM_EQ(GL_FRAMEBUFFER_COMPLETE, glCheckFramebufferStatus(GL_FRAMEBUFFER));

    glBindFramebuffer(GL_READ_FRAMEBUFFER, msaaFBO);
    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, resolveFBO);
    glBlitFramebuffer(0, 0, kSize, kSize, 0, 0, kSize, kSize, GL_COLOR_BUFFER_BIT, GL_NEAREST);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(getPerfCounters().resolveImageCommands, 0u);

    glBindFramebuffer(GL_READ_FRAMEBUFFER, resolveFBO);
    constexpr uint8_t kHalfPixelGradient = 256 / kSize / 2;
    EXPECT_PIXEL_NEAR(0, 0, kHalfPixelGradient, kHalfPixelGradient, 0, 255, 1.0);
    EXPECT_PIXEL_NEAR(kSize - 1, 0, 255 - kHalfPixelGradient, kHalfPixelGradient, 0, 255, 1.0);
    EXPECT_PIXEL_NEAR(0, kSize - 1, kHalfPixelGradient, 255 - kHalfPixelGradient, 0, 255, 1.0);
    EXPECT_PIXEL_NEAR(kSize - 1, kSize - 1, 255 - kHalfPixelGradient, 255 - kHalfPixelGradient, 0,
                      255, 1.0);
}

// Ensures a read-only depth-stencil feedback loop works in a single RenderPass.
TEST_P(VulkanPerformanceCounterTest, ReadOnlyDepthStencilFeedbackLoopUsesSingleRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr GLsizei kSize = 4;

    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    ANGLE_GL_PROGRAM(texProgram, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());

    GLTexture colorTexture;
    glBindTexture(GL_TEXTURE_2D, colorTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    setupQuadVertexBuffer(0.5f, 1.0f);
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(0);

    // Set up a depth texture and fill it with an arbitrary initial value.
    GLTexture depthTexture;
    glBindTexture(GL_TEXTURE_2D, depthTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, kSize, kSize, 0, GL_DEPTH_COMPONENT,
                 GL_UNSIGNED_INT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glBindTexture(GL_TEXTURE_2D, 0);

    GLFramebuffer depthAndColorFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, depthAndColorFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTexture, 0);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTexture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    GLFramebuffer depthOnlyFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, depthOnlyFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTexture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    // Draw to a first FBO to initialize the depth buffer.
    glBindFramebuffer(GL_FRAMEBUFFER, depthOnlyFBO);
    glEnable(GL_DEPTH_TEST);
    glUseProgram(redProgram);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // Start new RenderPass with depth write disabled and no loop.
    glBindFramebuffer(GL_FRAMEBUFFER, depthAndColorFBO);
    glDepthMask(false);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Now set up the read-only feedback loop.
    glBindTexture(GL_TEXTURE_2D, depthTexture);
    glUseProgram(texProgram);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Tweak the bits to keep it read-only.
    glEnable(GL_DEPTH_TEST);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Render with just the depth attachment.
    glUseProgram(redProgram);
    glBindTexture(GL_TEXTURE_2D, 0);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Rebind the depth texture.
    glUseProgram(texProgram);
    glDepthMask(GL_FALSE);
    glEnable(GL_DEPTH_TEST);
    glBindTexture(GL_TEXTURE_2D, depthTexture);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);

    // Do a final write to depth to make sure we can switch out of read-only mode.
    glBindTexture(GL_TEXTURE_2D, 0);
    glDepthMask(GL_TRUE);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();
}

// Tests that invalidate followed by masked draws results in no load and store.
//
// - Scenario: invalidate, mask color, draw
TEST_P(VulkanPerformanceCounterTest, ColorInvalidateMaskDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 0, 1, 0, 1, &expected);

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    // Invalidate
    const GLenum discards[] = {GL_COLOR_ATTACHMENT0};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, discards);
    ASSERT_GL_NO_ERROR();

    // Mask color output
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

    // Draw
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareColorOpCounters(getPerfCounters(), expected);

    // Start and end another render pass without color mask
    ++expected.renderPasses;
    ++expected.colorStoreOpStores;

    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Tests that invalidate followed by discarded draws results in no load and store.
//
// - Scenario: invalidate, rasterizer discard, draw
TEST_P(VulkanPerformanceCounterTest, ColorInvalidateDiscardDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 0, 1, 0, 1, &expected);

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    // Invalidate
    const GLenum discards[] = {GL_COLOR_ATTACHMENT0};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, discards);
    ASSERT_GL_NO_ERROR();

    // Mask color output
    glEnable(GL_RASTERIZER_DISCARD);

    // Draw
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareColorOpCounters(getPerfCounters(), expected);

    // Start and end another render pass without color mask
    ++expected.renderPasses;
    ++expected.colorStoreOpStores;

    glDisable(GL_RASTERIZER_DISCARD);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Tests that masked draws results in no load and store.
//
// - Scenario: mask color, draw
TEST_P(VulkanPerformanceCounterTest, ColorMaskedDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 0, 1, 0, 1, &expected);

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    // Initialize the color buffer
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Mask color output
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

    // Draw
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareColorOpCounters(getPerfCounters(), expected);

    // Start and end another render pass without color mask
    ++expected.renderPasses;
    ++expected.colorLoadOpLoads;
    ++expected.colorStoreOpStores;

    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Tests that discarded draws results in no load and store.
//
// - Scenario: rasterizer discard, draw
TEST_P(VulkanPerformanceCounterTest, ColorDiscardDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 0, 1, 0, 1, &expected);

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    // Initialize the color buffer
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Mask color output
    glEnable(GL_RASTERIZER_DISCARD);

    // Draw
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareColorOpCounters(getPerfCounters(), expected);

    // Start and end another render pass without color mask
    ++expected.renderPasses;
    ++expected.colorLoadOpLoads;
    ++expected.colorStoreOpStores;

    glDisable(GL_RASTERIZER_DISCARD);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Test that read-only color usage results in load but no store.
//
// - Scenario: mask color, framebuffer fetch draw
TEST_P(VulkanPerformanceCounterTest_ES31, ColorMaskedFramebufferFetchDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_shader_framebuffer_fetch_non_coherent"));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+1)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 0, 1, &expected);

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    GLBuffer buffer;
    const GLColor kClearColor(40, 70, 100, 150);
    maskedFramebufferFetchDraw(kClearColor, buffer);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_NEAR(0, 0, kClearColor, 1);

    maskedFramebufferFetchDrawVerify(kClearColor, buffer);
    compareColorOpCounters(getPerfCounters(), expected);
}

// Tests that clear after masked draws is optimized to use loadOp
//
// - Scenario: clear, mask color, draw, clear
TEST_P(VulkanPerformanceCounterTest, ColorClearMaskedDrawThenClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    // No vkCmdClearAttachments should be issued.
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    expected.colorClearAttachments = getPerfCounters().colorClearAttachments;

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    // Clear color first
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);

    // Mask color output
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);

    // Draw
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Then clear color again.  This clear is moved up to loadOp, overriding the initial clear.
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    glClearColor(0, 0, 1, 1);
    glClear(GL_COLOR_BUFFER_BIT);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    compareColorOpCounters(getPerfCounters(), expected);
    compareClearAttachmentsCounter(expected.colorClearAttachments,
                                   getPerfCounters().colorClearAttachments);
}

// Test that clear of read-only color is not reordered with the draw.
//
// - Scenario: mask color, framebuffer fetch draw, clear
TEST_P(VulkanPerformanceCounterTest_ES31, ColorMaskedFramebufferFetchDrawThenClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_shader_framebuffer_fetch_non_coherent"));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0)
    // vkCmdClearAttachments should be used for the second clear.
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);
    expected.colorClearAttachments = getPerfCounters().colorClearAttachments + 1;

    GLFramebuffer framebuffer;
    GLTexture texture;
    setupForColorOpsTest(&framebuffer, &texture);

    GLBuffer buffer;
    const GLColor kClearColor(40, 70, 100, 150);
    maskedFramebufferFetchDraw(kClearColor, buffer);

    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    maskedFramebufferFetchDrawVerify(kClearColor, buffer);
    compareColorOpCounters(getPerfCounters(), expected);
    compareClearAttachmentsCounter(expected.colorClearAttachments,
                                   getPerfCounters().colorClearAttachments);
}

// Tests that clear after unused depth/stencil is optimized to use loadOp
//
// - Scenario: disable depth/stencil, draw, clear
TEST_P(VulkanPerformanceCounterTest, DepthStencilMaskedDrawThenClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // This optimization is not implemented when this workaround is in effect.
    ANGLE_SKIP_TEST_IF(mPreferDrawOverClearAttachments == ANGLEFeature::Supported);

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 0, 0, 1, 0, &expected);

    // No vkCmdClearAttachments should be issued.
    expected.depthClearAttachments   = getPerfCounters().depthClearAttachments;
    expected.stencilClearAttachments = getPerfCounters().stencilClearAttachments;

    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupForDepthStencilOpsTest(&framebuffer, &texture, &renderbuffer);

    // Disable depth/stencil
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Issue a draw call
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);

    // Clear depth/stencil
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
    compareClearAttachmentsCounter(expected.depthClearAttachments,
                                   getPerfCounters().depthClearAttachments);
    compareClearAttachmentsCounter(expected.stencilClearAttachments,
                                   getPerfCounters().depthClearAttachments);
}

// Tests that common PUBG MOBILE case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, disable, draw
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDisableDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Draw (since disabled, shouldn't change result)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that alternative PUBG MOBILE case does not break render pass, and that counts are correct:
//
// - Scenario: disable, invalidate, draw
TEST_P(VulkanPerformanceCounterTest, DisableInvalidateDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Invalidate (storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since disabled, shouldn't change result)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: disable, draw, invalidate, enable
TEST_P(VulkanPerformanceCounterTest, DisableDrawInvalidateEnable)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Note: setupClearAndDrawForDepthStencilOpsTest() did an enable and draw

    // Disable (since not invalidated, shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Draw (since not invalidated, shouldn't change result)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);
    // Note: The above enable calls will be ignored, since no drawing was done to force the enable
    // dirty bit to be processed

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass by reading back a pixel.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that common TRex case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidate)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Similar to Invalidate, but uses glInvalidateSubFramebuffer such that the given area covers the
// whole framebuffer.
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateSub)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateSubFramebuffer(GL_FRAMEBUFFER, 2, discards, -100, -100, kOpsTestSize + 200,
                               kOpsTestSize + 200);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Similar to InvalidateSub, but uses glInvalidateSubFramebuffer such that the given area does NOT
// covers the whole framebuffer.
TEST_P(VulkanPerformanceCounterTest, DepthStencilPartialInvalidateSub)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 0, 0, 1, 0, &expected);

    // Create the framebuffer and make sure depth/stencil have valid contents.
    ANGLE_GL_PROGRAM(drawRed, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&drawRed, &framebuffer, &texture, &renderbuffer, true);

    // Break the render pass so depth/stencil values are stored.
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start a new render pass that is scissored.  Depth/stencil should be loaded.  The draw call is
    // followed by an invalidate, so store shouldn't happen.

    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 1, 0, 0, 0, &expected);

    glEnable(GL_SCISSOR_TEST);
    glScissor(kOpsTestSize / 8, kOpsTestSize / 4, kOpsTestSize / 2, kOpsTestSize / 3);

    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
    glStencilFunc(GL_ALWAYS, 0x55, 0xFF);
    glDepthFunc(GL_ALWAYS);

    ANGLE_GL_PROGRAM(drawGreen, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(drawGreen, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateSubFramebuffer(GL_FRAMEBUFFER, 2, discards, kOpsTestSize / 8, kOpsTestSize / 8,
                               7 * kOpsTestSize / 8, 7 * kOpsTestSize / 8);

    // Break the render pass so depth/stencil values are discarded.
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    EXPECT_PIXEL_COLOR_EQ(kOpsTestSize / 2, kOpsTestSize / 2, GLColor::green);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start another render pass without scissor.  Because parts of the framebuffer attachments were
    // not invalidated, depth/stencil should be loaded.

    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 1, 0, 1, 0, &expected);

    glDisable(GL_SCISSOR_TEST);

    ANGLE_GL_PROGRAM(drawBlue, essl1_shaders::vs::Simple(), essl1_shaders::fs::Blue());
    drawQuad(drawBlue, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Verify results
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, draw
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 1, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, draw, disable
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDrawDisable)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // http://anglebug.com/6857
    ANGLE_SKIP_TEST_IF(IsLinux() && IsAMD() && IsVulkan());

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);
    // Note: this draw is just so that the disable dirty bits will be processed
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and then check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 1, 1, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, disable, draw, enable
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDisableDrawEnable)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Draw (since disabled, shouldn't change result)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);
    // Note: The above enable calls will be ignored, since no drawing was done to force the enable
    // dirty bit to be processed

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, disable, draw, enable, draw
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDisableDrawEnableDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 0, 1, 0, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Draw (since disabled, shouldn't change result)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and then check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 1, 1, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, draw, disable, enable
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDrawDisableEnable)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);
    // Note: this draw is just so that the disable dirty bits will be processed
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);
    // Note: The above enable calls will be ignored, since no drawing was done to force the enable
    // dirty bit to be processed

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Break the render pass and then check how many loads and stores were actually done
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 1, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, draw, disable, enable, invalidate
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDrawDisableEnableInvalidate)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);
    // Note: this draw is just so that the disable dirty bits will be processed
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, draw, disable, enable, invalidate, draw
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDrawDisableEnableInvalidateDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);
    // Note: this draw is just so that the disable dirty bits will be processed
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 1, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that another common (dEQP) case does not break render pass, and that counts are correct:
//
// - Scenario: invalidate, disable, enable, draw
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDisableEnableDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Execute the scenario that this test is for:

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Disable (shouldn't change result)
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);
    // Note: this draw is just so that the disable dirty bits will be processed
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable (shouldn't change result)
    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);

    // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Ensure that the render pass wasn't broken
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 1, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Tests that an in renderpass clear after invalidate keeps content stored.
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateAndClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    // Clear should vkCmdClearAttachments
    expected.depthClearAttachments = getPerfCounters().depthClearAttachments + 1;

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, false);

    // Disable depth test but with depth mask enabled so that clear should still work.
    glDisable(GL_DEPTH_TEST);
    glDepthMask(GL_TRUE);

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Do in-renderpass clear. This should result in StoreOp=STORE; mContentDefined = true.
    glClearDepthf(1.0f);
    glClear(GL_DEPTH_BUFFER_BIT);
    ASSERT_GL_NO_ERROR();

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);
    compareClearAttachmentsCounter(expected.depthClearAttachments,
                                   getPerfCounters().depthClearAttachments);

    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    // Bind FBO again and try to use the depth buffer without clear. This should result in
    // loadOp=LOAD and StoreOP=STORE
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glDisable(GL_STENCIL_TEST);
    ANGLE_GL_PROGRAM(blueProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Blue());
    // Should pass depth test: (0.5+1.0)/2.0=0.75 < 1.0
    drawQuad(blueProgram, essl1_shaders::PositionAttrib(), 0.5f);
    EXPECT_PIXEL_COLOR_EQ(kOpsTestSize / 2, kOpsTestSize / 2, GLColor::blue);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Tests that the draw path for clear after invalidate and disabling depth/stencil test keeps
// content stored.
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateAndMaskedClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 0, 0, 1, 0, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer, true);

    // Invalidate (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Disable depth/stencil test but make stencil masked
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);
    glDepthMask(GL_TRUE);
    glStencilMask(0xF0);

    // Enable scissor for the draw path to be taken.
    glEnable(GL_SCISSOR_TEST);
    glScissor(kOpsTestSize / 4, kOpsTestSize / 4, kOpsTestSize / 2, kOpsTestSize / 2);

    // Do in-renderpass clear. This should result in StoreOp=STORE
    glClearDepthf(1.0f);
    glClearStencil(0x55);
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
    ASSERT_GL_NO_ERROR();

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+1)
    // Note that depth write is enabled, while stencil is disabled.
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 1, 0, 0, 1, &expected);

    // Bind FBO again and try to use the depth buffer without clear. This should result in
    // loadOp=LOAD and StoreOP=STORE
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_EQUAL, 0x50, 0xF0);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
    glStencilMask(0xFF);
    ANGLE_GL_PROGRAM(blueProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Blue());
    drawQuad(blueProgram, essl1_shaders::PositionAttrib(), 0.95f);
    EXPECT_PIXEL_COLOR_EQ(kOpsTestSize / 2, kOpsTestSize / 2, GLColor::blue);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Tests whether depth-stencil ContentDefined will be correct when:
//
// - Scenario: invalidate, detach D/S texture and modify it, attach D/S texture, draw with blend
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDetachModifyTexAttachDrawWithBlend)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    ANGLE_GL_PROGRAM(greenProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);

    GLTexture colorTexture;
    glBindTexture(GL_TEXTURE_2D, colorTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTexture, 0);

    GLTexture depthStencilTexture;
    glBindTexture(GL_TEXTURE_2D, depthStencilTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, 2, 2, 0, GL_DEPTH_STENCIL,
                 GL_UNSIGNED_INT_24_8, nullptr);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
                           depthStencilTexture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    // Clear and draw with depth-stencil enabled
    glEnable(GL_DEPTH_TEST);
    glDepthMask(GL_TRUE);
    glDepthFunc(GL_LEQUAL);
    glClearDepthf(0.99f);
    glEnable(GL_STENCIL_TEST);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Invalidate depth & stencil (should result: in storeOp = DONT_CARE; mContentDefined = false)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Check for the expected number of render passes, expected color, and other expected counters
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Detach depth-stencil attachment
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    // Modify depth-stencil
    constexpr uint32_t kDepthStencilInitialValue = 0xafffff00;
    uint32_t depthStencilData[4] = {kDepthStencilInitialValue, kDepthStencilInitialValue,
                                    kDepthStencilInitialValue, kDepthStencilInitialValue};
    glBindTexture(GL_TEXTURE_2D, depthStencilTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, 2, 2, 0, GL_DEPTH_STENCIL,
                 GL_UNSIGNED_INT_24_8, depthStencilData);

    // Re-attach depth-stencil
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
                           depthStencilTexture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    // Draw again, showing that the modified depth-stencil value prevents a new color value
    //
    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+1)
    // Note that depth write is enabled, while stencil is disabled.
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 1, 0, 0, 1, &expected);
    drawQuad(greenProgram, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    // Check for the expected number of render passes, expected color, and other expected counters
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Draw again, using a different depth value, so that the drawing takes place
    //
    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 1, 0, 0, 1, &expected);
    drawQuad(greenProgram, essl1_shaders::PositionAttrib(), 0.2f);
    ASSERT_GL_NO_ERROR();
    // Check for the expected number of render passes, expected color, and other expected counters
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Tests that a GLRenderbuffer can be deleted before the render pass ends, and that everything
// still works.
//
// - Scenario: invalidate
TEST_P(VulkanPerformanceCounterTest, DepthStencilInvalidateDrawAndDeleteRenderbuffer)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    GLFramebuffer framebuffer;
    GLTexture texture;
    {
        // Declare the RAII-based GLRenderbuffer object within this set of curly braces, so that it
        // will be deleted early (at the close-curly-brace)
        GLRenderbuffer renderbuffer;
        setupClearAndDrawForDepthStencilOpsTest(&program, &framebuffer, &texture, &renderbuffer,
                                                false);

        // Invalidate (storeOp = DONT_CARE; mContentDefined = false)
        const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
        glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
        ASSERT_GL_NO_ERROR();

        // Draw (since enabled, should result: in storeOp = STORE; mContentDefined = true)
        drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
        ASSERT_GL_NO_ERROR();

        // Ensure that the render pass wasn't broken
        EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);
    }

    // The renderbuffer should now be deleted.

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Start and end another render pass, to check that the load ops are as expected
    setAndIncrementDepthStencilLoadCountersForOpsTest(getPerfCounters(), 0, 0, &expected);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    swapBuffers();
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
}

// Test that disabling color buffer after clear continues to use loadOp for it.
//
// - Scenario: clear color and depth, disable color, draw, enable color, draw
TEST_P(VulkanPerformanceCounterTest_ES31, ColorDisableThenDrawThenEnableThenDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupForColorDepthOpsTest(&framebuffer, &texture, &renderbuffer);

    // Expected:
    //   rpCount+1,
    //   depth(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    //   color(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 0, 1, 0, 0, 1, 0, &expected);
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);

    // Clear color and depth first
    glClearColor(1, 0, 0, 1);
    glClearDepthf(0.123);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Disable color output
    GLenum drawBuffers[] = {GL_NONE};
    glDrawBuffers(1, drawBuffers);

    // Issue a draw call, only affecting depth
    glDepthFunc(GL_ALWAYS);
    ANGLE_GL_PROGRAM(drawGreen, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(drawGreen, essl1_shaders::PositionAttrib(), 0.75f);

    // Enable color output
    drawBuffers[0] = GL_COLOR_ATTACHMENT0;
    glDrawBuffers(1, drawBuffers);

    // Issue another draw call, verifying depth simultaneously
    glDepthFunc(GL_LESS);
    ANGLE_GL_PROGRAM(drawBlue, essl1_shaders::vs::Simple(), essl1_shaders::fs::Blue());
    drawQuad(drawBlue, essl1_shaders::PositionAttrib(), 0.74f);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Verify results and check how many loads and stores were actually done.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    compareColorOpCounters(getPerfCounters(), expected);
    compareDepthOpCounters(getPerfCounters(), expected);
    ASSERT_GL_NO_ERROR();
}

// Tests that even if the app clears depth, it should be invalidated if there is no read.
TEST_P(VulkanPerformanceCounterTest, SwapShouldInvalidateDepthAfterClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());

    // Clear depth.
    glClear(GL_DEPTH_BUFFER_BIT);

    // Ensure we never read from depth.
    glDisable(GL_DEPTH_TEST);

    // Do one draw, then swap.
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedDepthClears = getPerfCounters().depthLoadOpClears;

    swapBuffers();

    uint32_t actualDepthClears = getPerfCounters().depthLoadOpClears;
    EXPECT_EQ(expectedDepthClears, actualDepthClears);
}

// Tests that masked color clears don't break the RP.
TEST_P(VulkanPerformanceCounterTest, MaskedColorClearDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // Mask color channels and clear the framebuffer multiple times.
    glClearColor(0.25f, 0.25f, 0.25f, 0.25f);
    glColorMask(GL_TRUE, GL_FALSE, GL_FALSE, GL_FALSE);
    glClear(GL_COLOR_BUFFER_BIT);

    glClearColor(0.5f, 0.5f, 0.5f, 0.5f);
    glColorMask(GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
    glClear(GL_COLOR_BUFFER_BIT);

    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
    glColorMask(GL_FALSE, GL_FALSE, GL_TRUE, GL_FALSE);
    glClear(GL_COLOR_BUFFER_BIT);

    glClearColor(0.75f, 0.75f, 0.75f, 0.75f);
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
    glClear(GL_COLOR_BUFFER_BIT);

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);

    EXPECT_PIXEL_NEAR(0, 0, 63, 127, 255, 191, 1);
}

// Tests that masked color/depth/stencil clears don't break the RP.
TEST_P(VulkanPerformanceCounterTest, MaskedClearDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr GLsizei kSize = 64;

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer renderbuffer;
    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              renderbuffer);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Passthrough(), essl1_shaders::fs::UniformColor());
    glUseProgram(program);
    GLint colorUniformLocation =
        glGetUniformLocation(program, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(-1, colorUniformLocation);
    ASSERT_GL_NO_ERROR();

    // Clear the framebuffer with a draw call to start a render pass.
    glViewport(0, 0, kSize, kSize);
    glDepthFunc(GL_ALWAYS);
    glStencilFunc(GL_ALWAYS, 0x55, 0xFF);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 1.0f);

    // Issue a masked clear.
    glClearColor(0.25f, 1.0f, 0.25f, 1.25f);
    glClearDepthf(0.0f);
    glClearStencil(0x3F);
    glColorMask(GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
    glStencilMask(0xF0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Make sure the render pass wasn't broken.
    EXPECT_EQ(expectedRenderPassCount, getPerfCounters().renderPasses);

    // Verify that clear was done correctly.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::yellow);

    glDisable(GL_SCISSOR_TEST);
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    glStencilMask(0xFF);

    // Make sure depth = 0.0f, stencil = 0x35
    glDepthFunc(GL_GREATER);
    glStencilFunc(GL_EQUAL, 0x35, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);

    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.05f);
    ASSERT_GL_NO_ERROR();

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::blue);
}

// Tests that clear followed by scissored draw uses loadOp to clear.
TEST_P(VulkanPerformanceCounterTest, ClearThenScissoredDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;
    uint32_t expectedDepthClears     = getPerfCounters().depthLoadOpClears + 1;
    uint32_t expectedStencilClears   = getPerfCounters().stencilLoadOpClears + 1;

    constexpr GLsizei kSize = 64;

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer renderbuffer;
    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              renderbuffer);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    // Clear depth/stencil
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
    glClearDepthf(1.0f);
    glClearStencil(0x55);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Issue a scissored draw call, expecting depth/stencil to be 1.0 and 0x55.
    glViewport(0, 0, kSize, kSize);
    glScissor(0, 0, kSize / 2, kSize);
    glEnable(GL_SCISSOR_TEST);

    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_EQUAL, 0x55, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
    glStencilMask(0xFF);

    ANGLE_GL_PROGRAM(drawGreen, essl1_shaders::vs::Passthrough(), essl1_shaders::fs::Green());
    drawQuad(drawGreen, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass.
    GLTexture copyTex;
    glBindTexture(GL_TEXTURE_2D, copyTex);
    glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, 0, 0, kSize, kSize, 0);
    ASSERT_GL_NO_ERROR();

    // Make sure a single render pass was used and depth/stencil clear used loadOp=CLEAR.
    EXPECT_EQ(expectedRenderPassCount, getPerfCounters().renderPasses);
    EXPECT_EQ(expectedDepthClears, getPerfCounters().depthLoadOpClears);
    EXPECT_EQ(expectedStencilClears, getPerfCounters().stencilLoadOpClears);

    // Verify correctness.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2 - 1, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2 - 1, kSize - 1, GLColor::green);

    EXPECT_PIXEL_COLOR_EQ(kSize / 2, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize - 1, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::red);
}

// Tests that scissored clears don't break the RP.
TEST_P(VulkanPerformanceCounterTest, ScissoredClearDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr GLsizei kSize = 64;

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer renderbuffer;
    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              renderbuffer);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    glEnable(GL_DEPTH_TEST);
    glEnable(GL_STENCIL_TEST);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Passthrough(), essl1_shaders::fs::UniformColor());
    glUseProgram(program);
    GLint colorUniformLocation =
        glGetUniformLocation(program, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(-1, colorUniformLocation);
    ASSERT_GL_NO_ERROR();

    // Clear the framebuffer with a draw call to start a render pass.
    glViewport(0, 0, kSize, kSize);
    glDepthFunc(GL_ALWAYS);
    glStencilFunc(GL_ALWAYS, 0x55, 0xFF);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 1.0f);

    // Issue a scissored clear.
    glEnable(GL_SCISSOR_TEST);
    glScissor(kSize / 4, kSize / 4, kSize / 2, kSize / 2);
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
    glClearDepthf(0.0f);
    glClearStencil(0x3F);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Make sure the render pass wasn't broken.
    EXPECT_EQ(expectedRenderPassCount, getPerfCounters().renderPasses);

    // Verify that clear was done correctly.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::red);

    EXPECT_PIXEL_COLOR_EQ(kSize / 4, kSize / 4, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(3 * kSize / 4 - 1, kSize / 4, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 4, 3 * kSize / 4 - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(3 * kSize / 4 - 1, 3 * kSize / 4 - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::green);

    glDisable(GL_SCISSOR_TEST);

    // Make sure the border has depth = 1.0f, stencil = 0x55
    glDepthFunc(GL_LESS);
    glStencilFunc(GL_EQUAL, 0x55, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);

    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Make sure the center has depth = 0.0f, stencil = 0x3F
    glDepthFunc(GL_GREATER);
    glStencilFunc(GL_EQUAL, 0x3F, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);

    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.05f);
    ASSERT_GL_NO_ERROR();

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::blue);

    EXPECT_PIXEL_COLOR_EQ(kSize / 4, kSize / 4, GLColor::magenta);
    EXPECT_PIXEL_COLOR_EQ(3 * kSize / 4 - 1, kSize / 4, GLColor::magenta);
    EXPECT_PIXEL_COLOR_EQ(kSize / 4, 3 * kSize / 4 - 1, GLColor::magenta);
    EXPECT_PIXEL_COLOR_EQ(3 * kSize / 4 - 1, 3 * kSize / 4 - 1, GLColor::magenta);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::magenta);
}

// Tests that draw buffer change with all color channel mask off should not break renderpass
TEST_P(VulkanPerformanceCounterTest, DrawbufferChangeWithAllColorMaskDisabled)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Passthrough(), essl1_shaders::fs::UniformColor());
    glUseProgram(program);
    GLint colorUniformLocation =
        glGetUniformLocation(program, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(-1, colorUniformLocation);
    ASSERT_GL_NO_ERROR();

    GLTexture textureRGBA;
    glBindTexture(GL_TEXTURE_2D, textureRGBA);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

    GLTexture textureDepth;
    glBindTexture(GL_TEXTURE_2D, textureDepth);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT24, 64, 64, 0, GL_DEPTH_COMPONENT,
                 GL_UNSIGNED_INT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textureRGBA, 0);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, textureDepth, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // Draw into FBO
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);  // clear to green
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glViewport(0, 0, 256, 256);
    glUniform4fv(colorUniformLocation, 1, GLColor::blue.toNormalizedVector().data());
    GLenum glDrawBuffers_bufs_1[] = {GL_COLOR_ATTACHMENT0};
    glDrawBuffers(1, glDrawBuffers_bufs_1);
    glEnable(GL_DEPTH_TEST);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    // Change draw buffer state and color mask
    GLenum glDrawBuffers_bufs_0[] = {GL_NONE};
    glDrawBuffers(1, glDrawBuffers_bufs_0);
    glColorMask(false, false, false, false);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.6f);
    // Change back draw buffer state and color mask
    glDrawBuffers(1, glDrawBuffers_bufs_1);
    glColorMask(true, true, true, true);
    glUniform4fv(colorUniformLocation, 1, GLColor::red.toNormalizedVector().data());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.7f);

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Tests the optimization that a glFlush call issued inside a renderpass will be skipped.
TEST_P(VulkanPerformanceCounterTest, InRenderpassFlushShouldNotBreakRenderpass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.5f);
    glFlush();
    ANGLE_GL_PROGRAM(greenProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(greenProgram, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Tests that depth/stencil texture clear/load works correctly.
TEST_P(VulkanPerformanceCounterTest, DepthStencilTextureClearAndLoad)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // TODO: http://anglebug.com/5329 Flaky test
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsVulkan());

    uint32_t expectedDepthClearCount   = getPerfCounters().depthLoadOpClears + 1;
    uint32_t expectedDepthLoadCount    = getPerfCounters().depthLoadOpLoads + 3;
    uint32_t expectedStencilClearCount = getPerfCounters().stencilLoadOpClears + 1;
    uint32_t expectedStencilLoadCount  = getPerfCounters().stencilLoadOpLoads + 3;

    constexpr GLsizei kSize = 6;

    // Create framebuffer to draw into, with both color and depth attachments.
    GLTexture color;
    glBindTexture(GL_TEXTURE_2D, color);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLTexture depth;
    glBindTexture(GL_TEXTURE_2D, depth);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, kSize, kSize, 0, GL_DEPTH_STENCIL,
                 GL_UNSIGNED_INT_24_8_OES, nullptr);

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color, 0);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, depth, 0);
    ASSERT_GL_NO_ERROR();

    // Set up texture for copy operation that breaks the render pass
    GLTexture copyTex;
    glBindTexture(GL_TEXTURE_2D, copyTex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    // Set viewport and clear depth/stencil
    glViewport(0, 0, kSize, kSize);
    glClearDepthf(1);
    glClearStencil(0x55);
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // If depth is not cleared to 1, rendering would fail.
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glDepthMask(GL_FALSE);

    // If stencil is not clear to 0x55, rendering would fail.
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_EQUAL, 0x55, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
    glStencilMask(0xFF);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw red
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw green
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw blue
    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw yellow
    glUniform4f(colorUniformLocation, 1.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Verify the counters
    EXPECT_EQ(getPerfCounters().depthLoadOpClears, expectedDepthClearCount);
    EXPECT_EQ(getPerfCounters().depthLoadOpLoads, expectedDepthLoadCount);
    EXPECT_EQ(getPerfCounters().stencilLoadOpClears, expectedStencilClearCount);
    EXPECT_EQ(getPerfCounters().stencilLoadOpLoads, expectedStencilLoadCount);

    // Verify that copies were done correctly.
    GLFramebuffer verifyFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, verifyFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, copyTex, 0);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(0, kSize / 2, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::yellow);
}

// Tests that multisampled-render-to-texture depth/stencil textures don't ever load data.
TEST_P(VulkanPerformanceCounterTest, RenderToTextureDepthStencilTextureShouldNotLoad)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // http://anglebug.com/5083
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsVulkan());

    ANGLE_SKIP_TEST_IF(!EnsureGLExtensionEnabled("GL_EXT_multisampled_render_to_texture2"));

    uint32_t expectedDepthClearCount   = getPerfCounters().depthLoadOpClears + 1;
    uint32_t expectedDepthLoadCount    = getPerfCounters().depthLoadOpLoads;
    uint32_t expectedStencilClearCount = getPerfCounters().stencilLoadOpClears + 1;
    uint32_t expectedStencilLoadCount  = getPerfCounters().stencilLoadOpLoads;

    constexpr GLsizei kSize = 6;

    // Create multisampled framebuffer to draw into, with both color and depth attachments.
    GLTexture colorMS;
    glBindTexture(GL_TEXTURE_2D, colorMS);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLTexture depthMS;
    glBindTexture(GL_TEXTURE_2D, depthMS);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, kSize, kSize, 0, GL_DEPTH_STENCIL,
                 GL_UNSIGNED_INT_24_8_OES, nullptr);

    GLFramebuffer fboMS;
    glBindFramebuffer(GL_FRAMEBUFFER, fboMS);
    glFramebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                                         colorMS, 0, 4);
    glFramebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D,
                                         depthMS, 0, 4);
    ASSERT_GL_NO_ERROR();

    // Set up texture for copy operation that breaks the render pass
    GLTexture copyTex;
    glBindTexture(GL_TEXTURE_2D, copyTex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    // Set viewport and clear depth
    glViewport(0, 0, kSize, kSize);
    glClearDepthf(1);
    glClearStencil(0x55);
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // If depth is not cleared to 1, rendering would fail.
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    // If stencil is not clear to 0x55, rendering would fail.
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_EQUAL, 0x55, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
    glStencilMask(0xFF);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw red
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw green
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw blue
    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw yellow
    glUniform4f(colorUniformLocation, 1.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Verify the counters
    EXPECT_EQ(getPerfCounters().depthLoadOpClears, expectedDepthClearCount);
    EXPECT_EQ(getPerfCounters().depthLoadOpLoads, expectedDepthLoadCount);
    EXPECT_EQ(getPerfCounters().stencilLoadOpClears, expectedStencilClearCount);
    EXPECT_EQ(getPerfCounters().stencilLoadOpLoads, expectedStencilLoadCount);

    // Verify that copies were done correctly.  Only the first copy can be verified because the
    // contents of the depth/stencil buffer is undefined after the first render pass break, meaning
    // it is unknown whether the three subsequent draw calls passed the depth or stencil tests.
    GLFramebuffer verifyFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, verifyFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, copyTex, 0);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2 - 1, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(0, kSize / 2 - 1, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2 - 1, kSize / 2 - 1, GLColor::red);
}

// Tests that multisampled-render-to-texture depth/stencil renderbuffers don't ever load depth data.
// Stencil data may still be loaded if VK_EXT_shader_stencil_export is not supported.
TEST_P(VulkanPerformanceCounterTest, RenderToTextureDepthStencilRenderbufferShouldNotLoad)
{
    // http://anglebug.com/5083
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsVulkan());
    // http://anglebug.com/5380
    ANGLE_SKIP_TEST_IF(IsLinux() && IsAMD() && IsVulkan());

    // http://crbug.com/1134286
    ANGLE_SKIP_TEST_IF(IsWindows7() && IsNVIDIA() && IsVulkan());

    ANGLE_SKIP_TEST_IF(!EnsureGLExtensionEnabled("GL_EXT_multisampled_render_to_texture"));
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // This test creates 4 render passes. In the first render pass, color, depth and stencil are
    // cleared.  In the following render passes, they must be loaded.  However, given that the
    // attachments are multisampled-render-to-texture, loads are done through an unresolve
    // operation.  All 4 render passes resolve the attachments.

    // Expect rpCount+4, depth(Clears+1, Loads+3, LoadNones+0, Stores+3, StoreNones+0),
    // stencil(Clears+1, Loads+3, LoadNones+0, Stores+3, StoreNones+0). Note that the Loads and
    // Stores are from the resolve attachments.
    setExpectedCountersForDepthOps(getPerfCounters(), 4, 1, 3, 0, 3, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 3, 0, 3, 0, &expected);

    // Additionally, expect 4 resolves and 3 unresolves.
    setExpectedCountersForUnresolveResolveTest(getPerfCounters(), 3, 3, 3, 4, 4, 4, &expected);

    constexpr GLsizei kSize = 6;

    // Create multisampled framebuffer to draw into, with both color and depth attachments.
    GLTexture colorMS;
    glBindTexture(GL_TEXTURE_2D, colorMS);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer depthStencilMS;
    glBindRenderbuffer(GL_RENDERBUFFER, depthStencilMS);
    glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER, 4, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer fboMS;
    glBindFramebuffer(GL_FRAMEBUFFER, fboMS);
    glFramebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                                         colorMS, 0, 4);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              depthStencilMS);
    ASSERT_GL_NO_ERROR();

    // Set up texture for copy operation that breaks the render pass
    GLTexture copyTex;
    glBindTexture(GL_TEXTURE_2D, copyTex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    // Set viewport and clear color, depth and stencil
    glViewport(0, 0, kSize, kSize);
    glClearDepthf(1);
    glClearStencil(0x55);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // If depth is not cleared to 1, rendering would fail.
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    // If stencil is not clear to 0x55, rendering would fail.
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_EQUAL, 0x55, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
    glStencilMask(0xFF);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw red
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.75f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw green
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw blue
    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.25f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw yellow
    glUniform4f(colorUniformLocation, 1.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Verify the counters
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
    compareCountersForUnresolveResolveTest(getPerfCounters(), expected);

    // Verify that copies were done correctly.
    GLFramebuffer verifyFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, verifyFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, copyTex, 0);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, 0, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(0, kSize / 2, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::yellow);
}

// Tests counters when multisampled-render-to-texture color/depth/stencil renderbuffers are
// invalidated.
TEST_P(VulkanPerformanceCounterTest, RenderToTextureInvalidate)
{
    // http://anglebug.com/5083
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsVulkan());

    ANGLE_SKIP_TEST_IF(!EnsureGLExtensionEnabled("GL_EXT_multisampled_render_to_texture"));

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // This test creates 4 render passes. In the first render pass, color, depth and stencil are
    // cleared.  After every render pass, the attachments are invalidated.  In the following render
    // passes thus they are not loaded (rather unresolved, as the attachments are
    // multisampled-render-to-texture).  Due to the invalidate call, neither of the 4 render passes
    // should resolve the attachments.

    // Expect rpCount+4, color(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 4, 1, 0, 0, 0, 0, &expected);
    // Expect rpCount+4, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 4, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 0, 0, 0, 0, &expected);

    // Additionally, expect no resolve and unresolve.
    setExpectedCountersForUnresolveResolveTest(getPerfCounters(), 0, 0, 0, 0, 0, 0, &expected);

    constexpr GLsizei kSize = 6;

    // Create multisampled framebuffer to draw into, with both color and depth attachments.
    GLTexture colorMS;
    glBindTexture(GL_TEXTURE_2D, colorMS);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer depthStencilMS;
    glBindRenderbuffer(GL_RENDERBUFFER, depthStencilMS);
    glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER, 4, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer fboMS;
    glBindFramebuffer(GL_FRAMEBUFFER, fboMS);
    glFramebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                                         colorMS, 0, 4);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              depthStencilMS);
    ASSERT_GL_NO_ERROR();

    // Set up texture for copy operation that breaks the render pass
    GLTexture copyTex;
    glBindTexture(GL_TEXTURE_2D, copyTex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    // Set viewport and clear color, depth and stencil
    glViewport(0, 0, kSize, kSize);
    glClearColor(0, 0, 0, 1.0f);
    glClearDepthf(1);
    glClearStencil(0x55);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Output depth/stencil, but disable testing so all draw calls succeed
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_ALWAYS);

    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_ALWAYS, 0x55, 0xFF);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
    glStencilMask(0xFF);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw red
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.75f);
    ASSERT_GL_NO_ERROR();

    // Invalidate everything
    const GLenum discards[] = {GL_COLOR_ATTACHMENT0, GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 3, discards);

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw green
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Invalidate everything
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 3, discards);

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw blue
    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.25f);
    ASSERT_GL_NO_ERROR();

    // Invalidate everything
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 3, discards);

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Draw yellow
    glUniform4f(colorUniformLocation, 1.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.0f);
    ASSERT_GL_NO_ERROR();

    // Invalidate everything
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 3, discards);

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, kSize / 2, kSize / 2, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Verify the counters
    compareColorOpCounters(getPerfCounters(), expected);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
    compareCountersForUnresolveResolveTest(getPerfCounters(), expected);
}

// Tests counters when uninitialized multisampled-render-to-texture depth/stencil renderbuffers are
// unused but not invalidated.
TEST_P(VulkanPerformanceCounterTest, RenderToTextureUninitializedAndUnusedDepthStencil)
{
    // http://anglebug.com/5083
    ANGLE_SKIP_TEST_IF(IsWindows() && IsAMD() && IsVulkan());

    ANGLE_SKIP_TEST_IF(!EnsureGLExtensionEnabled("GL_EXT_multisampled_render_to_texture"));

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, no depth/stencil clear, load or store.
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 0, 0, 0, &expected);

    // Additionally, expect only color resolve.
    setExpectedCountersForUnresolveResolveTest(getPerfCounters(), 0, 0, 0, 1, 0, 0, &expected);

    constexpr GLsizei kSize = 6;

    // Create multisampled framebuffer to draw into, with both color and depth attachments.
    GLTexture colorMS;
    glBindTexture(GL_TEXTURE_2D, colorMS);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer depthStencilMS;
    glBindRenderbuffer(GL_RENDERBUFFER, depthStencilMS);
    glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER, 4, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer fboMS;
    glBindFramebuffer(GL_FRAMEBUFFER, fboMS);
    glFramebufferTexture2DMultisampleEXT(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
                                         colorMS, 0, 4);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              depthStencilMS);
    ASSERT_GL_NO_ERROR();

    // Set up texture for copy operation that breaks the render pass
    GLTexture copyTex;
    glBindTexture(GL_TEXTURE_2D, copyTex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    // Set viewport and clear color only
    glViewport(0, 0, kSize, kSize);
    glClearColor(0, 0, 0, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    // Disable depth/stencil testing.
    glDisable(GL_DEPTH_TEST);
    glDisable(GL_STENCIL_TEST);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw red
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.75f);
    ASSERT_GL_NO_ERROR();

    // Break the render pass
    glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, kSize / 2, kSize / 2);
    ASSERT_GL_NO_ERROR();

    // Verify the counters
    compareDepthStencilLoadOpCounters(getPerfCounters(), expected);
    compareCountersForUnresolveResolveTest(getPerfCounters(), expected);
}

// Ensures we use read-only depth layout when there is no write
TEST_P(VulkanPerformanceCounterTest, ReadOnlyDepthBufferLayout)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr GLsizei kSize = 64;

    angle::VulkanPerfCounters expected;

    // Create depth only FBO and fill depth texture to leftHalf=0.0 and rightHalf=1.0. This should
    // use writeable layout
    expected.readOnlyDepthStencilRenderPasses = getPerfCounters().readOnlyDepthStencilRenderPasses;

    // Expect rpCount+1, depth(Clears+0, Loads+0, LoadNones+0, Stores+1, StoreNones+0),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 0, 0, 1, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    GLTexture depthTexture;
    glBindTexture(GL_TEXTURE_2D, depthTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT16, kSize, kSize, 0, GL_DEPTH_COMPONENT,
                 GL_UNSIGNED_INT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    GLFramebuffer depthOnlyFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, depthOnlyFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTexture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_ALWAYS);
    glDepthMask(GL_TRUE);
    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    glViewport(0, 0, kSize / 2, kSize);
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.0f);
    glViewport(kSize / 2, 0, kSize / 2, kSize);
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 1.0f);
    glViewport(0, 0, kSize, kSize);
    ASSERT_GL_NO_ERROR();

    // Because the layout counter is updated at end of renderpass, we need to issue a finish call
    // here to end the renderpass.
    glFinish();

    uint32_t actualReadOnlyDepthStencilCount = getPerfCounters().readOnlyDepthStencilRenderPasses;
    EXPECT_EQ(expected.readOnlyDepthStencilRenderPasses, actualReadOnlyDepthStencilCount);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Create a color+depth FBO and use depth as read only. This should use read only layout
    ++expected.readOnlyDepthStencilRenderPasses;
    // Expect rpCount+1, depth(Clears+0, Loads+1, LoadNones+0, Stores+0, StoreNones+1),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 1, 0, 0, 1, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    GLTexture colorTexture;
    glBindTexture(GL_TEXTURE_2D, colorTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    GLFramebuffer depthAndColorFBO;
    glBindFramebuffer(GL_FRAMEBUFFER, depthAndColorFBO);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, colorTexture, 0);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, depthTexture, 0);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    // Clear color to blue and draw a green quad with depth=0.5
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);
    glDepthMask(GL_FALSE);

    angle::Vector4 clearColor = GLColor::blue.toNormalizedVector();
    glClearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]);
    glClear(GL_COLOR_BUFFER_BIT);
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();
    // The pixel check will end renderpass.
    EXPECT_PIXEL_COLOR_EQ(1, 1, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(1 + kSize / 2, 1, GLColor::red);
    actualReadOnlyDepthStencilCount = getPerfCounters().readOnlyDepthStencilRenderPasses;
    EXPECT_EQ(expected.readOnlyDepthStencilRenderPasses, actualReadOnlyDepthStencilCount);
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Ensures depth/stencil is not loaded after storeOp=DONT_CARE due to optimization (as opposed to
// invalidate)
TEST_P(VulkanPerformanceCounterTest, RenderPassAfterRenderPassWithoutDepthStencilWrite)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 0, 1, 0, 1, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    constexpr GLsizei kSize = 64;

    // Create FBO with color, depth and stencil.  Leave depth/stencil uninitialized.
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLRenderbuffer renderbuffer;
    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, kSize, kSize);

    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER,
                              renderbuffer);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);
    ASSERT_GL_NO_ERROR();

    // Draw to the FBO, without enabling depth/stencil.
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Passthrough(), essl1_shaders::fs::UniformColor());
    glUseProgram(program);
    GLint colorUniformLocation =
        glGetUniformLocation(program, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(-1, colorUniformLocation);
    ASSERT_GL_NO_ERROR();

    glViewport(0, 0, kSize, kSize);
    glUniform4f(colorUniformLocation, 1.0f, 0.0f, 0.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 1.0f);

    // Break the render pass and ensure no depth/stencil load/store was done.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    // Expect rpCount+1, depth(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1),
    // stencil(Clears+0, Loads+0, LoadNones+1, Stores+0, StoreNones+1)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 0, 0, 1, 0, 1, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 0, 0, 1, 0, 1, &expected);

    // Draw again with similar conditions, and again make sure no load/store is done.
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(program, essl1_shaders::PositionAttrib(), 1.0f);

    // Break the render pass and ensure no depth/stencil load/store was done.
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
    compareDepthStencilOpCounters(getPerfCounters(), expected);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);
}

// Ensures repeated clears of various kind (all attachments, some attachments, scissored, masked
// etc) don't break the render pass.
TEST_P(VulkanPerformanceCounterTest, ClearAfterClearDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    constexpr GLsizei kSize = 6;

    // Create a framebuffer to clear with both color and depth/stencil attachments.
    GLTexture color;
    glBindTexture(GL_TEXTURE_2D, color);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLTexture depth;
    glBindTexture(GL_TEXTURE_2D, depth);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, kSize, kSize, 0, GL_DEPTH_STENCIL,
                 GL_UNSIGNED_INT_24_8_OES, nullptr);

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color, 0);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, depth, 0);
    ASSERT_GL_NO_ERROR();

    // Clear color and depth, but not stencil.
    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
    glClearDepthf(0.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Clear color and stencil, but not depth.
    glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
    glClearStencil(0x11);
    glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Clear depth and stencil, but not color.
    glClearDepthf(0.1f);
    glClearStencil(0x22);
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Clear masked color, and unmasked depth.
    glClearDepthf(0.2f);
    glClearColor(0.1f, 1.0f, 0.0f, 1.0f);
    glColorMask(GL_FALSE, GL_TRUE, GL_FALSE, GL_FALSE);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Clear unmasked color, and masked stencil.
    glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    glClearStencil(0x33);
    glStencilMask(0xF0);
    glClear(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Clear unmasked depth and stencil.
    glClearDepthf(0.3f);
    glClearStencil(0x44);
    glStencilMask(0xFF);
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Clear with scissor.
    glEnable(GL_SCISSOR_TEST);
    glScissor(kSize / 3, kSize / 3, kSize / 3, kSize / 3);
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
    glClearDepthf(1.0f);
    glClearStencil(0x55);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    // Verify render pass count.
    EXPECT_EQ(getPerfCounters().renderPasses, expectedRenderPassCount);

    // Make sure the result is correct.  The border of the image should be blue with depth 0.3f and
    // stencil 0x44.  The center is red with depth 1.0f and stencil 0x55.

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::blue);

    EXPECT_PIXEL_COLOR_EQ(kSize / 3, kSize / 3, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(2 * kSize / 3 - 1, kSize / 3, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 3, 2 * kSize / 3 - 1, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(2 * kSize / 3 - 1, 2 * kSize / 3 - 1, GLColor::red);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::red);

    glViewport(0, 0, kSize, kSize);
    glDisable(GL_SCISSOR_TEST);

    // Center: If depth is not cleared to 1, rendering would fail.
    glEnable(GL_DEPTH_TEST);
    glDepthFunc(GL_LESS);

    // Center: If stencil is not clear to 0x55, rendering would fail.
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_EQUAL, 0x55, 0xFF);
    glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
    glStencilMask(0xFF);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw green
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Verify that only the center has changed
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::blue);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::blue);

    EXPECT_PIXEL_COLOR_EQ(kSize / 3, kSize / 3, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(2 * kSize / 3 - 1, kSize / 3, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 3, 2 * kSize / 3 - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(2 * kSize / 3 - 1, 2 * kSize / 3 - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::green);

    // Border: If depth is not cleared to 0.3f, rendering would fail.
    glDepthFunc(GL_LESS);

    // Center: If stencil is not clear to 0x44, rendering would fail.
    glStencilFunc(GL_EQUAL, 0x44, 0xFF);

    // Draw yellow
    glUniform4f(colorUniformLocation, 1.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), -0.5f);
    ASSERT_GL_NO_ERROR();

    // Verify that only the border has changed
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, 0, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(0, kSize - 1, GLColor::yellow);
    EXPECT_PIXEL_COLOR_EQ(kSize - 1, kSize - 1, GLColor::yellow);

    EXPECT_PIXEL_COLOR_EQ(kSize / 3, kSize / 3, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(2 * kSize / 3 - 1, kSize / 3, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 3, 2 * kSize / 3 - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(2 * kSize / 3 - 1, 2 * kSize / 3 - 1, GLColor::green);
    EXPECT_PIXEL_COLOR_EQ(kSize / 2, kSize / 2, GLColor::green);
}

// Ensures that changing the scissor size doesn't break the render pass.
TEST_P(VulkanPerformanceCounterTest, ScissorDoesNotBreakRenderPass)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    constexpr GLsizei kSize = 16;

    // Create a framebuffer with a color attachment.
    GLTexture color;
    glBindTexture(GL_TEXTURE_2D, color);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color, 0);
    ASSERT_GL_NO_ERROR();

    // First, issue a clear and make sure it's done.  Later we can verify that areas outside
    // scissors are not rendered to.
    glClearColor(0, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);

    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // This test starts with a small scissor and gradually grows it and issues draw calls and
    // various kinds of clears:
    //
    // - Clear the center to red
    //
    //     +----------------------+
    //     | K                    |
    //     |                      |
    //     |       +-----+        |
    //     |       |     |        |
    //     |       |  R  |        |
    //     |       |     |        |
    //     |       +-----+        |
    //     |                      |
    //     |                      |
    //     |                      |
    //     |                      |
    //     +----------------------+
    //
    // - Draw green to center right
    //
    //     +----------------------+
    //     |                      |
    //     |              +-------+
    //     |       +-----+|       |
    //     |       |     ||       |
    //     |       |  R  ||  G    |
    //     |       |     ||       |
    //     |       +-----+|       |
    //     |              |       |
    //     |              |       |
    //     |              |       |
    //     |              +-------+
    //     +----------------------+
    //
    // - Masked clear of center column, only outputting to the blue channel
    //
    //     +----------------------+
    //     |      +---+           |
    //     |      | B |   +-------+
    //     |      |+--+--+|       |
    //     |      ||  |  ||       |
    //     |      ||M |R ||  G    |
    //     |      ||  |  ||       |
    //     |      |+--+--+|       |
    //     |      |   |   |       |
    //     |      |   |   |       |
    //     |      |   |   |       |
    //     |      |   |   +-------+
    //     +------+---+-----------+
    //
    // - Masked draw of center row, only outputting to alpha.
    //
    //     +----------------------+
    //     | K    +---+ K         |
    //     |      | B |   +-------+
    //     |      |+--+--+|       |
    //     |      ||M |R ||   G   |
    //     | +----++--+--++-----+ |
    //     | |    ||TM|TR||     | |
    //     | | TK |+--+--+|  TG | |
    //     | |    |TB |TK |     | |
    //     | +----+---+---+-----+ |
    //     |      |   |   |   G   |
    //     | K    | B | K +-------+
    //     +------+---+-----------+
    //
    // Where: K=Black, R=Red, G=Green, B=Blue, M=Magenta, T=Transparent

    constexpr GLsizei kClearX      = kSize / 3;
    constexpr GLsizei kClearY      = kSize / 3;
    constexpr GLsizei kClearWidth  = kSize / 3;
    constexpr GLsizei kClearHeight = kSize / 3;

    constexpr GLsizei kDrawX      = kClearX + kClearWidth + 2;
    constexpr GLsizei kDrawY      = kSize / 5;
    constexpr GLsizei kDrawWidth  = kSize - kDrawX;
    constexpr GLsizei kDrawHeight = 7 * kSize / 10;

    constexpr GLsizei kMaskedClearX      = kSize / 4;
    constexpr GLsizei kMaskedClearY      = kSize / 8;
    constexpr GLsizei kMaskedClearWidth  = kSize / 4;
    constexpr GLsizei kMaskedClearHeight = 7 * kSize / 8;

    constexpr GLsizei kMaskedDrawX      = kSize / 8;
    constexpr GLsizei kMaskedDrawY      = kSize / 2;
    constexpr GLsizei kMaskedDrawWidth  = 6 * kSize / 8;
    constexpr GLsizei kMaskedDrawHeight = kSize / 4;

    glEnable(GL_SCISSOR_TEST);

    // Clear center to red
    glScissor(kClearX, kClearY, kClearWidth, kClearHeight);
    glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw green to center right
    glScissor(kDrawX, kDrawY, kDrawWidth, kDrawHeight);
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0);
    ASSERT_GL_NO_ERROR();

    // Masked blue-channel clear of center column
    glColorMask(GL_FALSE, GL_FALSE, GL_TRUE, GL_FALSE);
    glScissor(kMaskedClearX, kMaskedClearY, kMaskedClearWidth, kMaskedClearHeight);
    glClearColor(0.5f, 0.5f, 1.0f, 0.5f);
    glClear(GL_COLOR_BUFFER_BIT);

    // Masked alpha-channel draw of center row
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE);
    glScissor(kMaskedDrawX, kMaskedDrawY, kMaskedDrawWidth, kMaskedDrawHeight);
    glUniform4f(colorUniformLocation, 0.5f, 0.5f, 0.5f, 0.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0);
    ASSERT_GL_NO_ERROR();

    // Verify render pass count.
    EXPECT_EQ(getPerfCounters().renderPasses, expectedRenderPassCount);

    // Make sure the result is correct:
    //
    //     +----------------------+  <-- 0
    //     | K    +---+ K         |  <-- kMaskedClearY
    //     |      | B |   +-------+  <-- kDrawY
    //     |      |+--+--+|       |  <-- kClearY
    //     |      ||M |R ||   G   |
    //     | +----++--+--++-----+ |  <-- kMaskedDrawY
    //     | |    ||TM|TR||     | |
    //     | | TK |+--+--+|  TG | |  <-- kClearY + kClearHeight
    //     | |    |TB |TK |     | |
    //     | +----+---+---+-----+ |  <-- kMaskedDrawY + kMaskedDrawHeight
    //     |      |   |   |   G   |
    //     | K    | B | K +-------+  <-- kDrawY + kDrawHeight
    //     +------+---+-----------+  <-- kSize == kMaskedClearY + kMaskedClearHeight
    //     | |    ||  |  ||     | |
    //     | |    ||  |  ||     |  \---> kSize == kDrawX + kDrawWidth
    //     | |    ||  |  ||      \-----> kMaskedDrawX + kMaskedDrawWidth
    //     | |    ||  |  | \-----------> kDrawX
    //     | |    ||  |   \------------> kClearX + kClearWidth
    //     | |    ||   \---------------> kMaskedClearX + kMaskedClearWidth
    //     | |    | \------------------> kClearX
    //     | |     \-------------------> kMaskedClearX
    //     |  \------------------------> kMaskedDrawX
    //      \--------------------------> 0

    constexpr GLsizei kClearX2       = kClearX + kClearWidth;
    constexpr GLsizei kClearY2       = kClearY + kClearHeight;
    constexpr GLsizei kDrawX2        = kDrawX + kDrawWidth;
    constexpr GLsizei kDrawY2        = kDrawY + kDrawHeight;
    constexpr GLsizei kMaskedClearX2 = kMaskedClearX + kMaskedClearWidth;
    constexpr GLsizei kMaskedClearY2 = kMaskedClearY + kMaskedClearHeight;
    constexpr GLsizei kMaskedDrawX2  = kMaskedDrawX + kMaskedDrawWidth;
    constexpr GLsizei kMaskedDrawY2  = kMaskedDrawY + kMaskedDrawHeight;

    constexpr GLColor kTransparentRed(255, 0, 0, 0);
    constexpr GLColor kTransparentGreen(0, 255, 0, 0);
    constexpr GLColor kTransparentBlue(0, 0, 255, 0);
    constexpr GLColor kTransparentMagenta(255, 0, 255, 0);

    // Verify the black areas.
    EXPECT_PIXEL_RECT_EQ(0, 0, kMaskedClearX, kMaskedDrawY, GLColor::black);
    EXPECT_PIXEL_RECT_EQ(0, kMaskedDrawY2, kMaskedClearX, kSize - kMaskedDrawY2, GLColor::black);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, 0, kSize - kMaskedClearX2, kDrawY, GLColor::black);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, kDrawY2, kSize - kMaskedClearX2, kSize - kDrawY2,
                         GLColor::black);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX, 0, kMaskedClearWidth, kMaskedClearY, GLColor::black);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, kDrawY, kDrawX - kMaskedClearX2, kClearY - kDrawY,
                         GLColor::black);
    EXPECT_PIXEL_RECT_EQ(kClearX2, kClearY, kDrawX - kClearX2, kMaskedDrawY - kClearY,
                         GLColor::black);
    EXPECT_PIXEL_RECT_EQ(0, kMaskedDrawY, kMaskedDrawX, kMaskedDrawHeight, GLColor::black);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, kMaskedDrawY2, kDrawX - kMaskedClearX2,
                         kSize - kMaskedDrawY2, GLColor::black);

    // Verify the red area:
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, kClearY, kClearX2 - kMaskedClearX2, kMaskedDrawY - kClearY,
                         GLColor::red);
    // Verify the transparent red area:
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, kMaskedDrawY, kClearX2 - kMaskedClearX2,
                         kClearY2 - kMaskedDrawY, kTransparentRed);
    // Verify the magenta area:
    EXPECT_PIXEL_RECT_EQ(kClearX, kClearY, kMaskedClearX2 - kClearX, kMaskedDrawY - kClearY,
                         GLColor::magenta);
    // Verify the transparent magenta area:
    EXPECT_PIXEL_RECT_EQ(kClearX, kMaskedDrawY, kMaskedClearX2 - kClearX, kClearY2 - kMaskedDrawY,
                         kTransparentMagenta);
    // Verify the green area:
    EXPECT_PIXEL_RECT_EQ(kDrawX, kDrawY, kDrawWidth, kMaskedDrawY - kDrawY, GLColor::green);
    EXPECT_PIXEL_RECT_EQ(kDrawX, kMaskedDrawY2, kDrawWidth, kDrawY2 - kMaskedDrawY2,
                         GLColor::green);
    EXPECT_PIXEL_RECT_EQ(kMaskedDrawX2, kMaskedDrawY, kDrawX2 - kMaskedDrawX2, kMaskedDrawHeight,
                         GLColor::green);
    // Verify the transparent green area:
    EXPECT_PIXEL_RECT_EQ(kDrawX, kMaskedDrawY, kMaskedDrawX2 - kDrawX, kMaskedDrawHeight,
                         kTransparentGreen);
    // Verify the blue area:
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX, kMaskedClearY, kMaskedClearWidth, kClearY - kMaskedClearY,
                         GLColor::blue);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX, kMaskedDrawY2, kMaskedClearWidth,
                         kMaskedClearY2 - kMaskedDrawY2, GLColor::blue);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX, kClearY, kClearX - kMaskedClearX, kMaskedDrawY - kClearY,
                         GLColor::blue);
    // Verify the transparent blue area:
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX, kClearY2, kMaskedClearWidth, kMaskedDrawY2 - kClearY2,
                         kTransparentBlue);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX, kMaskedDrawY, kClearX - kMaskedClearX,
                         kClearY2 - kMaskedDrawY, kTransparentBlue);
    // Verify the transparent black area:
    EXPECT_PIXEL_RECT_EQ(kMaskedDrawX, kMaskedDrawY, kMaskedClearX - kMaskedDrawX,
                         kMaskedDrawHeight, GLColor::transparentBlack);
    EXPECT_PIXEL_RECT_EQ(kMaskedClearX2, kClearY2, kDrawX - kMaskedClearX2,
                         kMaskedDrawY2 - kClearY2, GLColor::transparentBlack);
    EXPECT_PIXEL_RECT_EQ(kClearX2, kMaskedDrawY, kDrawX - kClearX2, kMaskedDrawHeight,
                         GLColor::transparentBlack);
}

// Tests that changing UBO bindings does not allocate new descriptor sets.
TEST_P(VulkanPerformanceCounterTest, ChangingUBOsHitsDescriptorSetCache)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // Set up two UBOs, one filled with "1" and the second with "2".
    constexpr GLsizei kCount = 64;
    std::vector<GLint> data1(kCount, 1);
    std::vector<GLint> data2(kCount, 2);

    GLBuffer ubo1;
    glBindBuffer(GL_UNIFORM_BUFFER, ubo1);
    glBufferData(GL_UNIFORM_BUFFER, kCount * sizeof(data1[0]), data1.data(), GL_STATIC_DRAW);

    GLBuffer ubo2;
    glBindBuffer(GL_UNIFORM_BUFFER, ubo2);
    glBufferData(GL_UNIFORM_BUFFER, kCount * sizeof(data2[0]), data2.data(), GL_STATIC_DRAW);

    // Set up a program that verifies the contents of uniform blocks.
    constexpr char kVS[] = R"(#version 300 es
precision mediump float;
in vec4 position;
void main()
{
    gl_Position = position;
})";

    constexpr char kFS[] = R"(#version 300 es
precision mediump float;
uniform buf {
    int data[64/4];
};
uniform int checkValue;
out vec4 outColor;

void main()
{
    for (int i = 0; i < 64/4; ++i) {
        if (data[i] != checkValue) {
            outColor = vec4(1, 0, 0, 1);
            return;
        }
    }
    outColor = vec4(0, 1, 0, 1);
})";

    ANGLE_GL_PROGRAM(program, kVS, kFS);
    glUseProgram(program);
    ASSERT_GL_NO_ERROR();

    GLint uniLoc = glGetUniformLocation(program, "checkValue");
    ASSERT_NE(-1, uniLoc);

    GLuint blockIndex = glGetUniformBlockIndex(program, "buf");
    ASSERT_NE(blockIndex, GL_INVALID_INDEX);

    glUniformBlockBinding(program, blockIndex, 0);
    ASSERT_GL_NO_ERROR();

    // Set up the rest of the GL state.
    auto quadVerts = GetQuadVertices();
    GLBuffer vertexBuffer;
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, quadVerts.size() * sizeof(quadVerts[0]), quadVerts.data(),
                 GL_STATIC_DRAW);

    GLint posLoc = glGetAttribLocation(program, "position");
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, 0);
    glEnableVertexAttribArray(posLoc);

    // Draw a few times with each UBO. Stream out one pixel for post-render verification.
    constexpr int kIterations         = 5;
    constexpr GLsizei kPackBufferSize = sizeof(GLColor) * kIterations * 2;

    GLBuffer packBuffer;
    glBindBuffer(GL_PIXEL_PACK_BUFFER, packBuffer);
    glBufferData(GL_PIXEL_PACK_BUFFER, kPackBufferSize, nullptr, GL_STREAM_READ);

    GLsizei offset = 0;

    uint32_t expectedShaderResourcesCacheMisses = 0;

    for (int iteration = 0; iteration < kIterations; ++iteration)
    {
        glUniform1i(uniLoc, 1);
        glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo1);
        glDrawArrays(GL_TRIANGLES, 0, 6);
        glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE,
                     reinterpret_cast<GLvoid *>(static_cast<uintptr_t>(offset)));
        offset += sizeof(GLColor);
        glUniform1i(uniLoc, 2);
        glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo2);
        glDrawArrays(GL_TRIANGLES, 0, 6);
        glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE,
                     reinterpret_cast<GLvoid *>(static_cast<uintptr_t>(offset)));
        offset += sizeof(GLColor);

        // Capture the allocations counter after the first run.
        if (iteration == 0)
        {
            expectedShaderResourcesCacheMisses =
                getPerfCounters().shaderResourcesDescriptorSetCacheMisses;
        }
    }

    ASSERT_GL_NO_ERROR();
    EXPECT_GT(expectedShaderResourcesCacheMisses, 0u);

    // Verify correctness first.
    std::vector<GLColor> expectedData(kIterations * 2, GLColor::green);
    std::vector<GLColor> actualData(kIterations * 2, GLColor::black);

    void *mapPtr = glMapBufferRange(GL_PIXEL_PACK_BUFFER, 0, kPackBufferSize, GL_MAP_READ_BIT);
    ASSERT_NE(nullptr, mapPtr);
    memcpy(actualData.data(), mapPtr, kPackBufferSize);

    glUnmapBuffer(GL_PIXEL_PACK_BUFFER);

    EXPECT_EQ(expectedData, actualData);

    // Check for unnecessary descriptor set allocations.
    uint32_t actualShaderResourcesCacheMisses =
        getPerfCounters().shaderResourcesDescriptorSetCacheMisses;
    EXPECT_EQ(expectedShaderResourcesCacheMisses, actualShaderResourcesCacheMisses);
}

// Test that mapping a buffer that the GPU is using as read-only ghosts the buffer, rather than
// waiting for the GPU access to complete before returning a pointer to the buffer.
TEST_P(VulkanPerformanceCounterTest, MappingGpuReadOnlyBufferGhostsBuffer)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // 1. Create a buffer, map it, fill it with red
    // 2. Draw with buffer (GPU read-only)
    // 3. Map the same buffer and fill with white
    //    - This should ghost the buffer, rather than ending the render pass.
    // 4. Draw with buffer
    // 5. Update the buffer with glBufferSubData()
    // 6. Draw with the buffer
    // The render pass should only be broken (counters.renderPasses == 0) due to the glReadPixels()
    // to verify the draw at the end.

    const std::array<GLColor, 4> kInitialData = {GLColor::red, GLColor::red, GLColor::red,
                                                 GLColor::red};
    const std::array<GLColor, 4> kUpdateData1 = {GLColor::white, GLColor::white, GLColor::white,
                                                 GLColor::white};
    const std::array<GLColor, 4> kUpdateData2 = {GLColor::blue, GLColor::blue, GLColor::blue,
                                                 GLColor::blue};

    GLBuffer buffer;
    glBindBuffer(GL_UNIFORM_BUFFER, buffer);
    glBufferData(GL_UNIFORM_BUFFER, sizeof(kInitialData), kInitialData.data(), GL_DYNAMIC_DRAW);
    glBindBufferBase(GL_UNIFORM_BUFFER, 0, buffer);
    ASSERT_GL_NO_ERROR();

    // Draw
    constexpr char kVerifyUBO[] = R"(#version 300 es
precision mediump float;
uniform block {
    uvec4 data;
} ubo;
uniform uint expect;
uniform vec4 successOutput;
out vec4 colorOut;
void main()
{
    if (all(equal(ubo.data, uvec4(expect))))
        colorOut = successOutput;
    else
        colorOut = vec4(1.0, 0, 0, 1.0);
})";

    ANGLE_GL_PROGRAM(verifyUbo, essl3_shaders::vs::Simple(), kVerifyUBO);
    glUseProgram(verifyUbo);

    GLint expectLoc = glGetUniformLocation(verifyUbo, "expect");
    ASSERT_NE(-1, expectLoc);
    GLint successLoc = glGetUniformLocation(verifyUbo, "successOutput");
    ASSERT_NE(-1, successLoc);

    glUniform1ui(expectLoc, kInitialData[0].asUint());
    glUniform4f(successLoc, 0, 1, 0, 1);

    drawQuad(verifyUbo, essl3_shaders::PositionAttrib(), 0.5);
    ASSERT_GL_NO_ERROR();

    // Map the buffer and update it.
    // This should ghost the buffer and avoid breaking the render pass, since the GPU is only
    // reading it.
    void *mappedBuffer =
        glMapBufferRange(GL_UNIFORM_BUFFER, 0, sizeof(kInitialData), GL_MAP_WRITE_BIT);
    // 'renderPasses == 0' here means the render pass was broken and a new one was started.
    ASSERT_EQ(getPerfCounters().renderPasses, 1u);
    ASSERT_EQ(getPerfCounters().buffersGhosted, 1u);

    memcpy(mappedBuffer, kUpdateData1.data(), sizeof(kInitialData));

    glUnmapBuffer(GL_UNIFORM_BUFFER);
    ASSERT_GL_NO_ERROR();

    // Verify that the buffer has the updated value.
    glUniform1ui(expectLoc, kUpdateData1[0].asUint());
    glUniform4f(successLoc, 0, 0, 1, 1);

    drawQuad(verifyUbo, essl3_shaders::PositionAttrib(), 0.5);
    ASSERT_GL_NO_ERROR();
    ASSERT_EQ(getPerfCounters().renderPasses, 1u);

    // Update the buffer with glBufferSubData
    glBufferSubData(GL_UNIFORM_BUFFER, 0, sizeof(kUpdateData2), kUpdateData2.data());
    ASSERT_GL_NO_ERROR();
    ASSERT_EQ(getPerfCounters().renderPasses, 1u);

    // Verify that the buffer has the updated value.
    glUniform1ui(expectLoc, kUpdateData2[0].asUint());
    glUniform4f(successLoc, 0, 1, 1, 1);

    drawQuad(verifyUbo, essl3_shaders::PositionAttrib(), 0.5);
    ASSERT_GL_NO_ERROR();
    ASSERT_EQ(getPerfCounters().renderPasses, 1u);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::cyan);
}

// Verifies that BufferSubData calls don't trigger state updates for non-translated formats.
TEST_P(VulkanPerformanceCounterTest, BufferSubDataShouldNotTriggerSyncState)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    ANGLE_GL_PROGRAM(testProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    glUseProgram(testProgram);

    GLint posLoc = glGetAttribLocation(testProgram, essl1_shaders::PositionAttrib());
    ASSERT_NE(-1, posLoc);

    setupQuadVertexBuffer(0.5f, 1.0f);
    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    EXPECT_EQ(getPerfCounters().vertexArraySyncStateCalls, 1u);

    const std::array<Vector3, 6> &quadVertices = GetQuadVertices();
    size_t bufferSize                          = sizeof(quadVertices[0]) * quadVertices.size();

    glBufferSubData(GL_ARRAY_BUFFER, 0, bufferSize, quadVertices.data());

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    EXPECT_EQ(getPerfCounters().vertexArraySyncStateCalls, 1u);

    // Verify the BufferData with a whole buffer size is treated like the SubData call.
    glBufferData(GL_ARRAY_BUFFER, sizeof(quadVertices[0]) * quadVertices.size(),
                 quadVertices.data(), GL_STATIC_DRAW);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::green);

    EXPECT_EQ(getPerfCounters().vertexArraySyncStateCalls, 1u);
}

// Verifies that rendering to backbuffer discards depth/stencil.
TEST_P(VulkanPerformanceCounterTest, SwapShouldInvalidateDepthStencil)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 0, 0, 0, 0, &expected);

    // Clear to verify that _some_ counters did change (as opposed to for example all being reset on
    // swap)
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    glEnable(GL_DEPTH_TEST);
    glDepthMask(GL_TRUE);
    glDepthFunc(GL_ALWAYS);
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_ALWAYS, 0x00, 0xFF);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);

    ANGLE_GL_PROGRAM(drawGreen, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(drawGreen, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Swap buffers to implicitely resolve
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Verifies that rendering to MSAA backbuffer discards depth/stencil.
TEST_P(VulkanPerformanceCounterTest_MSAA, SwapShouldInvalidateDepthStencil)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0),
    // stencil(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 1, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForStencilOps(getPerfCounters(), 1, 0, 0, 0, 0, &expected);

    // Clear to verify that _some_ counters did change (as opposed to for example all being reset on
    // swap)
    glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);

    glEnable(GL_DEPTH_TEST);
    glDepthMask(GL_TRUE);
    glDepthFunc(GL_ALWAYS);
    glEnable(GL_STENCIL_TEST);
    glStencilFunc(GL_ALWAYS, 0x00, 0xFF);
    glStencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);

    ANGLE_GL_PROGRAM(drawGreen, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(drawGreen, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Swap buffers to implicitely resolve
    swapBuffers();
    compareDepthStencilOpCounters(getPerfCounters(), expected);
}

// Verifies that multisample swapchain resolve occurs in subpass.
TEST_P(VulkanPerformanceCounterTest_MSAA, SwapShouldResolveWithSubpass)
{
    angle::VulkanPerfCounters expected;
    // Expect rpCount+1, color(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);

    uint32_t expectedResolvesSubpass = getPerfCounters().swapchainResolveInSubpass + 1;
    uint32_t expectedResolvesOutside = getPerfCounters().swapchainResolveOutsideSubpass;

    // Clear color.
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw green
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Swap buffers to implicitly resolve
    swapBuffers();
    EXPECT_EQ(getPerfCounters().swapchainResolveInSubpass, expectedResolvesSubpass);
    EXPECT_EQ(getPerfCounters().swapchainResolveOutsideSubpass, expectedResolvesOutside);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Verifies that in a multisample swapchain, drawing to the default FBO followed by user FBO and
// then swapping triggers the resolve outside the optimization subpass.
TEST_P(VulkanPerformanceCounterTest_MSAA, SwapAfterDrawToDifferentFBOsShouldResolveOutsideSubpass)
{
    constexpr GLsizei kSize = 16;
    angle::VulkanPerfCounters expected;
    // Expect rpCount+1, color(Clears+1, Loads+0, LoadNones+0, Stores+2, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 2, 0, &expected);

    uint32_t expectedResolvesSubpass = getPerfCounters().swapchainResolveInSubpass;
    uint32_t expectedResolvesOutside = getPerfCounters().swapchainResolveOutsideSubpass + 1;

    // Create a framebuffer to clear.
    GLTexture color;
    glBindTexture(GL_TEXTURE_2D, color);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color, 0);
    ASSERT_GL_NO_ERROR();

    // Clear color.
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Draw green to default framebuffer
    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Draw blue to the user framebuffer
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Swap buffers to resolve outside the optimization subpass
    swapBuffers();
    EXPECT_EQ(getPerfCounters().swapchainResolveInSubpass, expectedResolvesSubpass);
    EXPECT_EQ(getPerfCounters().swapchainResolveOutsideSubpass, expectedResolvesOutside);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Verifies that in a multisample swapchain, subpass resolve only happens when the render pass
// covers the entire area.
TEST_P(VulkanPerformanceCounterTest_MSAA, ResolveWhenRenderPassNotEntireArea)
{
    constexpr GLsizei kSize = 16;
    angle::VulkanPerfCounters expected;
    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+2, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 2, 0, &expected);

    uint32_t expectedResolvesSubpass = getPerfCounters().swapchainResolveInSubpass;
    uint32_t expectedResolvesOutside = getPerfCounters().swapchainResolveOutsideSubpass + 1;

    // Create a framebuffer to clear.
    GLTexture color;
    glBindTexture(GL_TEXTURE_2D, color);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, color, 0);
    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    ASSERT_GL_NO_ERROR();

    // Clear color.
    glDisable(GL_SCISSOR_TEST);
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::black);

    // Set up program
    ANGLE_GL_PROGRAM(drawColor, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(drawColor);
    GLint colorUniformLocation =
        glGetUniformLocation(drawColor, angle::essl1_shaders::ColorUniform());
    ASSERT_NE(colorUniformLocation, -1);

    // Scissor the render area
    glEnable(GL_SCISSOR_TEST);
    glScissor(kSize / 4, kSize / 4, kSize / 2, kSize / 2);

    // Draw blue to the user framebuffer
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glUniform4f(colorUniformLocation, 0.0f, 0.0f, 1.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Draw green to default framebuffer
    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    glUniform4f(colorUniformLocation, 0.0f, 1.0f, 0.0f, 1.0f);
    drawQuad(drawColor, essl1_shaders::PositionAttrib(), 0.95f);
    ASSERT_GL_NO_ERROR();

    // Swap buffers, which should not resolve the image in subpass
    swapBuffers();
    EXPECT_EQ(getPerfCounters().swapchainResolveInSubpass, expectedResolvesSubpass);
    EXPECT_EQ(getPerfCounters().swapchainResolveOutsideSubpass, expectedResolvesOutside);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Tests that uniform updates eventually stop updating descriptor sets.
TEST_P(VulkanPerformanceCounterTest, UniformUpdatesHitDescriptorSetCache)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    ANGLE_GL_PROGRAM(testProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::UniformColor());
    glUseProgram(testProgram);
    GLint posLoc = glGetAttribLocation(testProgram, essl1_shaders::PositionAttrib());
    GLint uniLoc = glGetUniformLocation(testProgram, essl1_shaders::ColorUniform());

    std::array<Vector3, 6> quadVerts = GetQuadVertices();

    GLBuffer vbo;
    glBindBuffer(GL_ARRAY_BUFFER, vbo);
    glBufferData(GL_ARRAY_BUFFER, quadVerts.size() * sizeof(quadVerts[0]), quadVerts.data(),
                 GL_STATIC_DRAW);

    glVertexAttribPointer(posLoc, 3, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);

    ASSERT_GL_NO_ERROR();

    // Choose a number of iterations sufficiently large to ensure all uniforms are cached.
    constexpr int kIterations = 2000;

    // First pass: cache all the uniforms.
    RNG rng;
    for (int iteration = 0; iteration < kIterations; ++iteration)
    {
        Vector3 randomVec3 = RandomVec3(rng.randomInt(), 0.0f, 1.0f);

        glUniform4f(uniLoc, randomVec3.x(), randomVec3.y(), randomVec3.z(), 1.0f);
        glDrawArrays(GL_TRIANGLES, 0, 6);

        GLColor expectedColor = GLColor(randomVec3);
        EXPECT_PIXEL_COLOR_NEAR(0, 0, expectedColor, 5);
    }

    ASSERT_GL_NO_ERROR();

    uint32_t expectedCacheMisses = getPerfCounters().uniformsAndXfbDescriptorSetCacheMisses;
    EXPECT_GT(expectedCacheMisses, 0u);

    // Second pass: ensure all the uniforms are cached.
    for (int iteration = 0; iteration < kIterations; ++iteration)
    {
        Vector3 randomVec3 = RandomVec3(rng.randomInt(), 0.0f, 1.0f);

        glUniform4f(uniLoc, randomVec3.x(), randomVec3.y(), randomVec3.z(), 1.0f);
        glDrawArrays(GL_TRIANGLES, 0, 6);

        GLColor expectedColor = GLColor(randomVec3);
        EXPECT_PIXEL_COLOR_NEAR(0, 0, expectedColor, 5);
    }

    ASSERT_GL_NO_ERROR();

    uint32_t actualCacheMisses = getPerfCounters().uniformsAndXfbDescriptorSetCacheMisses;
    EXPECT_EQ(expectedCacheMisses, actualCacheMisses);
}

// Test one texture sampled by fragment shader, then image load it by compute
// shader, at last fragment shader do something else.
TEST_P(VulkanPerformanceCounterTest_ES31, DrawDispatchImageReadDrawWithEndRP)
{

    constexpr char kVSSource[] = R"(#version 310 es
in vec4 a_position;
out vec2 v_texCoord;

void main()
{
    gl_Position = vec4(a_position.xy, 0.0, 1.0);
    v_texCoord = a_position.xy * 0.5 + vec2(0.5);
})";

    constexpr char kFSSource[] = R"(#version 310 es
precision mediump float;
uniform sampler2D u_tex2D;
in vec2 v_texCoord;
out vec4 out_FragColor;
void main()
{
    out_FragColor = texture(u_tex2D, v_texCoord);
})";

    constexpr char kFSSource1[] = R"(#version 310 es
precision mediump float;
out vec4 out_FragColor;
void main()
{
    out_FragColor = vec4(1.0);
})";

    constexpr char kCSSource[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(rgba32f, binding=0) readonly  uniform highp image2D uIn;
layout(std140, binding=0) buffer buf {
    vec4 outData;
};

void main()
{
    outData = imageLoad(uIn, ivec2(gl_LocalInvocationID.xy));
})";

    GLfloat initValue[4] = {1.0, 1.0, 1.0, 1.0};

    // Step 1: Set up a simple 2D Texture rendering loop.
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32F, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_FLOAT, initValue);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    GLBuffer vertexBuffer;
    GLfloat vertices[] = {-1, -1, 1, -1, -1, 1, 1, 1};
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, 8 * sizeof(GLfloat), vertices, GL_STATIC_DRAW);

    ANGLE_GL_PROGRAM(program, kVSSource, kFSSource);
    glUseProgram(program);

    GLint posLoc = glGetAttribLocation(program, "a_position");
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);
    ASSERT_GL_NO_ERROR();
    glBindImageTexture(0, texture, 0, GL_FALSE, 0, GL_READ_ONLY, GL_RGBA32F);

    GLBuffer ssbo;
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBufferData(GL_SHADER_STORAGE_BUFFER, 16, nullptr, GL_STREAM_DRAW);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);

    // This is actually suboptimal, and ideally only one render pass should be necessary.
    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 2;

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Step 2: load this image through compute
    ANGLE_GL_COMPUTE_PROGRAM(csProgram, kCSSource);
    glUseProgram(csProgram);

    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);

    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    const GLfloat *ptr = reinterpret_cast<const GLfloat *>(
        glMapBufferRange(GL_SHADER_STORAGE_BUFFER, 0, 16, GL_MAP_READ_BIT));

    EXPECT_GL_NO_ERROR();
    for (unsigned int idx = 0; idx < 4; idx++)
    {
        EXPECT_EQ(1.0, *(ptr + idx));
    }

    // Step3
    ANGLE_GL_PROGRAM(program2, kVSSource, kFSSource1);
    glUseProgram(program2);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Test one texture sampled by fragment shader, followed by glReadPixels, then image
// load it by compute shader, and at last fragment shader do something else.
TEST_P(VulkanPerformanceCounterTest_ES31, DrawDispatchImageReadDrawWithoutEndRP)
{

    constexpr char kVSSource[] = R"(#version 310 es
in vec4 a_position;
out vec2 v_texCoord;

void main()
{
    gl_Position = vec4(a_position.xy, 0.0, 1.0);
    v_texCoord = a_position.xy * 0.5 + vec2(0.5);
})";

    constexpr char kFSSource[] = R"(#version 310 es
precision mediump float;
uniform sampler2D u_tex2D;
in vec2 v_texCoord;
out vec4 out_FragColor;
void main()
{
    out_FragColor = texture(u_tex2D, v_texCoord);
})";

    constexpr char kFSSource1[] = R"(#version 310 es
precision mediump float;
out vec4 out_FragColor;
void main()
{
    out_FragColor = vec4(1.0);
})";

    constexpr char kCSSource[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(rgba32f, binding=0) readonly  uniform highp image2D uIn;
layout(std140, binding=0) buffer buf {
    vec4 outData;
};

void main()
{
    outData = imageLoad(uIn, ivec2(gl_LocalInvocationID.xy));
})";

    GLfloat initValue[4] = {1.0, 1.0, 1.0, 1.0};

    // Step 1: Set up a simple 2D Texture rendering loop.
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32F, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_FLOAT, initValue);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    GLBuffer vertexBuffer;
    GLfloat vertices[] = {-1, -1, 1, -1, -1, 1, 1, 1};
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, 8 * sizeof(GLfloat), vertices, GL_STATIC_DRAW);

    GLBuffer ssbo;
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBufferData(GL_SHADER_STORAGE_BUFFER, 16, nullptr, GL_STREAM_DRAW);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);

    ANGLE_GL_PROGRAM(program, kVSSource, kFSSource);
    glUseProgram(program);

    GLint posLoc = glGetAttribLocation(program, "a_position");
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);
    ASSERT_GL_NO_ERROR();

    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Call glReadPixels to reset the getPerfCounters().renderPasses
    std::vector<GLColor> actualColors(1);
    glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, actualColors.data());

    // Ideally, the following "FS sample + CS image load + FS something", should
    // handle in one render pass.
    // Currently, we can ensure the first of "FS sample + CS image load" in one
    // render pass, but will start new render pass if following the last FS operations,
    // which need to be optimized further.
    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 2;

    // Now this texture owns none layout transition
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    // Step 2: load this image through compute
    ANGLE_GL_COMPUTE_PROGRAM(csProgram, kCSSource);
    glUseProgram(csProgram);

    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);
    glBindImageTexture(0, texture, 0, GL_FALSE, 0, GL_READ_ONLY, GL_RGBA32F);

    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    // Step3
    ANGLE_GL_PROGRAM(program2, kVSSource, kFSSource1);
    glUseProgram(program2);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Test that one texture sampled by fragment shader, compute shader and fragment
// shader sequentlly.
TEST_P(VulkanPerformanceCounterTest_ES31, TextureSampleByDrawDispatchDraw)
{
    constexpr char kVSSource[] = R"(#version 310 es
in vec4 a_position;
out vec2 v_texCoord;

void main()
{
gl_Position = vec4(a_position.xy, 0.0, 1.0);
v_texCoord = a_position.xy * 0.5 + vec2(0.5);
})";

    constexpr char kFSSource[] = R"(#version 310 es
uniform sampler2D u_tex2D;
precision highp float;
in vec2 v_texCoord;
out vec4 out_FragColor;
void main()
{
out_FragColor = texture(u_tex2D, v_texCoord);
})";

    constexpr char kCSSource[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
precision highp sampler2D;
uniform sampler2D tex;
layout(std140, binding=0) buffer buf {
vec4 outData;
};
void main()
{
uint x = gl_LocalInvocationID.x;
uint y = gl_LocalInvocationID.y;
outData = texture(tex, vec2(x, y));
})";

    GLfloat initValue[4] = {1.0, 1.0, 1.0, 1.0};

    // Step 1: Set up a simple 2D Texture rendering loop.
    GLTexture texture;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32F, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RGBA, GL_FLOAT, initValue);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    GLfloat vertices[] = {-1, -1, 1, -1, -1, 1, 1, 1};

    GLBuffer vertexBuffer;
    glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, 8 * sizeof(GLfloat), vertices, GL_STATIC_DRAW);

    ANGLE_GL_PROGRAM(program, kVSSource, kFSSource);
    glUseProgram(program);

    GLint posLoc = glGetAttribLocation(program, "a_position");
    ASSERT_NE(-1, posLoc);

    glVertexAttribPointer(posLoc, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(posLoc);
    ASSERT_GL_NO_ERROR();

    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
    ASSERT_GL_NO_ERROR();
    uint32_t expectedRenderPassCount = getPerfCounters().renderPasses + 1;

    // Step 2: sample this texture through compute
    GLBuffer ssbo;
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBufferData(GL_SHADER_STORAGE_BUFFER, 16, nullptr, GL_STREAM_DRAW);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);

    ANGLE_GL_COMPUTE_PROGRAM(csProgram, kCSSource);
    glUseProgram(csProgram);

    glBindTexture(GL_TEXTURE_2D, texture);
    glUniform1i(glGetUniformLocation(csProgram, "tex"), 0);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);

    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    // Step3: use the first program sample texture again
    glUseProgram(program);
    glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
    ASSERT_GL_NO_ERROR();

    uint32_t actualRenderPassCount = getPerfCounters().renderPasses;
    EXPECT_EQ(expectedRenderPassCount, actualRenderPassCount);
}

// Verify a mid-render pass clear of a newly enabled attachment uses LOAD_OP_CLEAR.
TEST_P(VulkanPerformanceCounterTest, DisableThenMidRenderPassClear)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // This optimization is not implemented when this workaround is in effect.
    ANGLE_SKIP_TEST_IF(mPreferDrawOverClearAttachments == ANGLEFeature::Supported);

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+1, Loads+0, LoadNones+0, Stores+2, StoreNones+0)
    // vkCmdClearAttachments should be used for color attachment 0.
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 2, 0, &expected);
    expected.colorClearAttachments = getPerfCounters().colorClearAttachments + 1;

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);

    GLTexture textures[2];

    glBindTexture(GL_TEXTURE_2D, textures[0]);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures[0], 0);

    glBindTexture(GL_TEXTURE_2D, textures[1]);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, textures[1], 0);

    // Only enable attachment 0.
    GLenum drawBuffers[] = {GL_COLOR_ATTACHMENT0, GL_NONE};
    glDrawBuffers(2, drawBuffers);

    // Draw red.
    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    // Enable attachment 1.
    drawBuffers[1] = GL_COLOR_ATTACHMENT1;
    glDrawBuffers(2, drawBuffers);

    // Clear both attachments to green.
    glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
    glClear(GL_COLOR_BUFFER_BIT);

    constexpr char kFS[] = R"(#version 300 es
precision highp float;
layout(location = 0) out vec4 my_FragColor0;
layout(location = 1) out vec4 my_FragColor1;
void main()
{
    my_FragColor0 = vec4(0.0, 0.0, 1.0, 1.0);
    my_FragColor1 = vec4(0.0, 0.0, 1.0, 1.0);
})";

    // Draw blue to both attachments.
    ANGLE_GL_PROGRAM(blueProgram, essl3_shaders::vs::Simple(), kFS);
    drawQuad(blueProgram, essl3_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Verify attachment 0.
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_EQ(0, 0, 0, 0, 255, 255);
    // Verify attachment 1.
    glReadBuffer(GL_COLOR_ATTACHMENT1);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_EQ(0, 0, 0, 0, 255, 255);

    compareColorOpCounters(getPerfCounters(), expected);
    compareClearAttachmentsCounter(expected.colorClearAttachments,
                                   getPerfCounters().colorClearAttachments);

    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);

    GLFramebuffer fbo2;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo2);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures[1], 0);

    glEnable(GL_BLEND);
    glBlendFunc(GL_ONE, GL_ONE);

    // Blend red
    drawQuad(redProgram, essl3_shaders::PositionAttrib(), 0.5f);
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Verify purple
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    EXPECT_PIXEL_EQ(0, 0, 255, 0, 255, 255);
    ASSERT_GL_NO_ERROR();

    compareColorOpCounters(getPerfCounters(), expected);
}

// Copy of ClearTest.InceptionScissorClears.
// Clears many small concentric rectangles using scissor regions. Verifies vkCmdClearAttachments()
// is used for the scissored clears, rather than vkCmdDraw().
TEST_P(VulkanPerformanceCounterTest, InceptionScissorClears)
{
    // https://issuetracker.google.com/166809097
    ANGLE_SKIP_TEST_IF(IsQualcomm() && IsVulkan());

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);

    angle::RNG rng;

    constexpr GLuint kSize = 16;

    // Create a square user FBO so we have more control over the dimensions.
    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);

    GLRenderbuffer rbo;
    glBindRenderbuffer(GL_RENDERBUFFER, rbo);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, kSize, kSize);

    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbo);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    glViewport(0, 0, kSize, kSize);

    // Clear small concentric squares using scissor.
    std::vector<GLColor> expectedColors;
    // TODO(syoussefi): verify this
    ANGLE_MAYBE_UNUSED uint32_t numScissoredClears = 0;
    for (GLuint index = 0; index < (kSize - 1) / 2; index++)
    {
        // Do the first clear without the scissor.
        if (index > 0)
        {
            glEnable(GL_SCISSOR_TEST);
            glScissor(index, index, kSize - (index * 2), kSize - (index * 2));
            ++numScissoredClears;
        }

        GLColor color = RandomColor(&rng);
        expectedColors.push_back(color);
        Vector4 floatColor = color.toNormalizedVector();
        glClearColor(floatColor[0], floatColor[1], floatColor[2], floatColor[3]);
        glClear(GL_COLOR_BUFFER_BIT);
    }

    ASSERT_GL_NO_ERROR();

    // Make sure everything was done in a single renderpass.
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    std::vector<GLColor> actualColors(expectedColors.size());
    glReadPixels(0, kSize / 2, actualColors.size(), 1, GL_RGBA, GL_UNSIGNED_BYTE,
                 actualColors.data());

    EXPECT_EQ(expectedColors, actualColors);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Copy of ClearTest.Depth16Scissored.
// Clears many small concentric rectangles using scissor regions. Verifies vkCmdClearAttachments()
// is used for the scissored clears, rather than vkCmdDraw().
TEST_P(VulkanPerformanceCounterTest, Depth16Scissored)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    GLRenderbuffer renderbuffer;
    glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer);
    constexpr int kRenderbufferSize = 64;
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, kRenderbufferSize,
                          kRenderbufferSize);

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, renderbuffer);

    glClearDepthf(0.0f);
    glClear(GL_DEPTH_BUFFER_BIT);

    glEnable(GL_SCISSOR_TEST);
    constexpr int kNumSteps = 13;
    // TODO(syoussefi): verify this
    ANGLE_MAYBE_UNUSED uint32_t numScissoredClears = 0;
    for (int ndx = 1; ndx < kNumSteps; ndx++)
    {
        float perc = static_cast<float>(ndx) / static_cast<float>(kNumSteps);
        glScissor(0, 0, static_cast<int>(kRenderbufferSize * perc),
                  static_cast<int>(kRenderbufferSize * perc));
        glClearDepthf(perc);
        glClear(GL_DEPTH_BUFFER_BIT);
        ++numScissoredClears;
    }

    // Make sure everything was done in a single renderpass.
    EXPECT_EQ(getPerfCounters().renderPasses, 1u);
}

// Copy of ClearTest.InceptionScissorClears.
// Clears many small concentric rectangles using scissor regions.
TEST_P(VulkanPerformanceCounterTest, DrawThenInceptionScissorClears)
{
    // https://issuetracker.google.com/166809097
    ANGLE_SKIP_TEST_IF(IsQualcomm() && IsVulkan());

    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    // Expect rpCount+1, color(Clears+0, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 0, 0, 1, 0, &expected);

    angle::RNG rng;
    std::vector<GLColor> expectedColors;
    constexpr GLuint kSize = 16;

    // Create a square user FBO so we have more control over the dimensions.
    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);

    GLRenderbuffer rbo;
    glBindRenderbuffer(GL_RENDERBUFFER, rbo);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA8, kSize, kSize);

    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, rbo);
    ASSERT_GL_FRAMEBUFFER_COMPLETE(GL_FRAMEBUFFER);

    glViewport(0, 0, kSize, kSize);

    ANGLE_GL_PROGRAM(redProgram, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    drawQuad(redProgram, essl1_shaders::PositionAttrib(), 0.5f);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);
    expectedColors.push_back(GLColor::red);

    compareColorOpCounters(getPerfCounters(), expected);

    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0)
    // TODO: Optimize scissored clears to use loadOp = CLEAR. anglebug.com/5194
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);

    // Draw small concentric squares using scissor.
    // TODO(syoussefi): verify this
    ANGLE_MAYBE_UNUSED uint32_t numScissoredClears = 0;
    // All clears are to a scissored render area.
    for (GLuint index = 1; index < (kSize - 1) / 2; index++)
    {
        glEnable(GL_SCISSOR_TEST);
        glScissor(index, index, kSize - (index * 2), kSize - (index * 2));
        ++numScissoredClears;

        GLColor color = RandomColor(&rng);
        expectedColors.push_back(color);
        Vector4 floatColor = color.toNormalizedVector();
        glClearColor(floatColor[0], floatColor[1], floatColor[2], floatColor[3]);
        glClear(GL_COLOR_BUFFER_BIT);
    }

    ASSERT_GL_NO_ERROR();

    // Make sure everything was done in a single renderpass.
    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Close the render pass to update the performance counters.
    std::vector<GLColor> actualColors(expectedColors.size());
    glReadPixels(0, kSize / 2, actualColors.size(), 1, GL_RGBA, GL_UNSIGNED_BYTE,
                 actualColors.data());
    EXPECT_EQ(expectedColors, actualColors);

    compareColorOpCounters(getPerfCounters(), expected);
}

// Test that color clears are respected after invalidate
TEST_P(VulkanPerformanceCounterTest, ColorClearAfterInvalidate)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    GLFramebuffer framebuffer;
    GLTexture texture;
    GLRenderbuffer renderbuffer;
    setupForColorDepthOpsTest(&framebuffer, &texture, &renderbuffer);

    // Execute the scenario that this test is for:

    // color+depth invalidate, color+depth clear
    //
    // Expected:
    //   rpCount+1,
    //   depth(Clears+1, Loads+0, LoadNones+0, Stores+0, StoreNones+0)
    //   color(Clears+1, Loads+0, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForDepthOps(getPerfCounters(), 0, 1, 0, 0, 0, 0, &expected);
    setExpectedCountersForColorOps(getPerfCounters(), 1, 1, 0, 0, 1, 0, &expected);

    glBindFramebuffer(GL_FRAMEBUFFER, framebuffer);

    // Invalidate (loadOp C=DONTCARE, D=DONTCARE)
    const GLenum discards[] = {GL_DEPTH_ATTACHMENT, GL_COLOR_ATTACHMENT0};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 2, discards);
    ASSERT_GL_NO_ERROR();

    // Clear (loadOp C=CLEAR, D=CLEAR)
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    // Save existing draw buffers
    GLint maxDrawBuffers = 0;
    glGetIntegerv(GL_MAX_DRAW_BUFFERS, &maxDrawBuffers);
    std::vector<GLenum> savedDrawBuffers(maxDrawBuffers);
    for (int i = 0; i < maxDrawBuffers; i++)
        glGetIntegerv(GL_DRAW_BUFFER0 + i, (GLint *)&savedDrawBuffers[i]);

    // Draw depth-only
    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Red());
    glDrawBuffers(0, nullptr);
    glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
    drawQuad(program, essl1_shaders::PositionAttrib(), 0.5f);
    glDrawBuffers(maxDrawBuffers, savedDrawBuffers.data());
    glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
    ASSERT_GL_NO_ERROR();

    // Invalidate depth only (storeOp should be C=STORE/D=CLEAR)
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, discards);

    glBindFramebuffer(GL_FRAMEBUFFER, 0);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    // Use swapBuffers and then check how many loads and stores were actually done
    swapBuffers();
    compareColorOpCounters(getPerfCounters(), expected);
    compareDepthOpCounters(getPerfCounters(), expected);
    ASSERT_GL_NO_ERROR();
}

// Ensure that image gets marked as defined after clear + invalidate + clear, and that we use
// LoadOp=Load for a renderpass which draws to it after the clear has been flushed with a blit.
TEST_P(VulkanPerformanceCounterTest, InvalidateThenRepeatedClearThenBlitThenDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    constexpr GLsizei kSize = 2;

    // tex[0] is what's being tested.  The others are helpers.
    GLTexture tex[3];
    for (int i = 0; i < 3; ++i)
    {
        glBindTexture(GL_TEXTURE_2D, tex[i]);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE,
                     nullptr);
    }

    GLFramebuffer fbo[3];
    for (int i = 0; i < 3; ++i)
    {
        glBindFramebuffer(GL_FRAMEBUFFER, fbo[i]);
        glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex[i], 0);
    }

    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);

    // Clear the image through fbo[0], and make sure the clear is flushed outside the render pass.
    glBindFramebuffer(GL_FRAMEBUFFER, fbo[0]);
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Invalidate it such that the contents are marked as undefined. Note that regardless of the
    // marking, the image is cleared nevertheless.
    const GLenum discards[] = {GL_COLOR_ATTACHMENT0};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, discards);

    // Clear it again to the same color.
    glClear(GL_COLOR_BUFFER_BIT);

    // Bind tex[0] to fbo[1] as the read fbo, and blit to fbo[2]
    glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo[1]);
    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex[0], 0);
    glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo[2]);

    // Blit.  This causes the second clear of tex[0] to be flushed outside the render pass, which
    // may be optimized out.
    glBlitFramebuffer(0, 0, kSize, kSize, 0, 0, kSize, kSize, GL_COLOR_BUFFER_BIT, GL_NEAREST);

    // Switch back to fbo[0] and draw with blend.  If the second clear is dropped and the image
    // continues to be marked as invalidated, loadOp=DONT_CARE would be used instead of loadOp=LOAD.
    glBindFramebuffer(GL_FRAMEBUFFER, fbo[0]);

    glEnable(GL_BLEND);
    glBlendFunc(GL_ONE, GL_ONE);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Blue());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0);

    EXPECT_EQ(expected.renderPasses, getPerfCounters().renderPasses);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::magenta);
    compareColorOpCounters(getPerfCounters(), expected);
}

// Ensure that image gets marked as defined after clear + invalidate + clear, and that we use
// LoadOp=Load for a renderpass which draws to it after the clear has been flushed with read pixels.
TEST_P(VulkanPerformanceCounterTest, InvalidateThenRepeatedClearThenReadbackThenDraw)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    angle::VulkanPerfCounters expected;

    constexpr GLsizei kSize = 2;

    GLTexture tex;
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kSize, kSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);

    GLFramebuffer fbo;
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tex, 0);

    // Expect rpCount+1, color(Clears+0, Loads+1, LoadNones+0, Stores+1, StoreNones+0)
    setExpectedCountersForColorOps(getPerfCounters(), 1, 0, 1, 0, 1, 0, &expected);

    // Clear the image, and make sure the clear is flushed outside the render pass.
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Invalidate it such that the contents are marked as undefined.  Note that regarldess of the
    // marking, the image is cleared nevertheless.
    const GLenum discards[] = {GL_COLOR_ATTACHMENT0};
    glInvalidateFramebuffer(GL_FRAMEBUFFER, 1, discards);

    // Clear it again to the same color, and make sure the clear is flushed outside the render pass,
    // which may be optimized out.
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // Draw with blend.  If the second clear is dropped and the image continues to be marked as
    // invalidated, loadOp=DONT_CARE would be used instead of loadOp=LOAD.
    glEnable(GL_BLEND);
    glBlendFunc(GL_ONE, GL_ONE);

    ANGLE_GL_PROGRAM(program, essl1_shaders::vs::Simple(), essl1_shaders::fs::Blue());
    drawQuad(program, essl1_shaders::PositionAttrib(), 0);

    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::magenta);
    compareColorOpCounters(getPerfCounters(), expected);
}

// Tests that the submission counters count the implicit submission in eglSwapBuffers().
TEST_P(VulkanPerformanceCounterTest, VerifySubmitCounters)
{
    initANGLEFeatures();

    uint32_t expectedVkQueueSubmitCount      = getPerfCounters().vkQueueSubmitCallsTotal;
    uint32_t expectedCommandQueueSubmitCount = getPerfCounters().commandQueueSubmitCallsTotal;

    // One submission coming from clear and read back
    ++expectedVkQueueSubmitCount;
    ++expectedCommandQueueSubmitCount;

    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedVkQueueSubmitCount);
    EXPECT_EQ(getPerfCounters().commandQueueSubmitCallsTotal, expectedCommandQueueSubmitCount);

    // One submission coming from draw and implicit submission from eglSwapBuffers
    ++expectedVkQueueSubmitCount;
    ++expectedCommandQueueSubmitCount;

    ANGLE_GL_PROGRAM(drawGreen, essl1_shaders::vs::Simple(), essl1_shaders::fs::Green());
    drawQuad(drawGreen, essl1_shaders::PositionAttrib(), 1.f);
    swapBuffers();

    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedVkQueueSubmitCount);
    EXPECT_EQ(getPerfCounters().commandQueueSubmitCallsTotal, expectedCommandQueueSubmitCount);
}

// Ensure that glFlush doesn't lead to vkQueueSubmit if there's nothing to submit.
TEST_P(VulkanPerformanceCounterTest, UnnecessaryFlushDoesntCauseSubmission)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    swapBuffers();
    uint32_t expectedVkQueueSubmitCalls = getPerfCounters().vkQueueSubmitCallsTotal;

    glFlush();
    glFlush();
    glFlush();

    // Nothing was recorded, so there shouldn't be anything to flush.
    glFinish();
    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedVkQueueSubmitCalls);

    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // One submission for the above readback
    ++expectedVkQueueSubmitCalls;

    glFinish();
    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedVkQueueSubmitCalls);

    glFlush();
    glFlush();
    glFlush();

    // No additional submissions since last one
    glFinish();
    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedVkQueueSubmitCalls);
}

// Ensure that glFenceSync doesn't lead to vkQueueSubmit if there's nothing to submit.
TEST_P(VulkanPerformanceCounterTest, SyncWihtoutCommandsDoesntCauseSubmission)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    swapBuffers();
    uint32_t expectedVkQueueSubmitCalls = getPerfCounters().vkQueueSubmitCallsTotal;

    glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);

    // Nothing was recorded, so there shouldn't be anything to flush.
    glFinish();
    EXPECT_EQ(getPerfCounters().vkQueueSubmitCallsTotal, expectedVkQueueSubmitCalls);
}

// In single-buffer mode, ensure that unnecessary eglSwapBuffers is completely ignored (i.e. doesn't
// lead to a command queue submission, consuming a submission serial).  Used to verify an
// optimization that ensures CPU throttling doesn't incur GPU bubbles with unnecessary
// eglSwapBuffers calls.
TEST_P(VulkanPerformanceCounterTest_SingleBuffer, SwapBuffersAfterFlushIgnored)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));
    initANGLEFeatures();

    // Set mode to single buffer
    EXPECT_EGL_TRUE(eglSurfaceAttrib(getEGLWindow()->getDisplay(), getEGLWindow()->getSurface(),
                                     EGL_RENDER_BUFFER, EGL_SINGLE_BUFFER));

    // Swap buffers so mode switch takes effect.
    swapBuffers();
    uint32_t expectedCommandQueueSubmitCalls = getPerfCounters().commandQueueSubmitCallsTotal;

    // Further swap buffers should be ineffective.
    swapBuffers();
    swapBuffers();
    swapBuffers();
    swapBuffers();

    EXPECT_EQ(getPerfCounters().commandQueueSubmitCallsTotal, expectedCommandQueueSubmitCalls);

    // Issue commands and flush them.
    glClearColor(1, 0, 0, 1);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    // One submission for the above readback
    ++expectedCommandQueueSubmitCalls;
    EXPECT_EQ(getPerfCounters().commandQueueSubmitCallsTotal, expectedCommandQueueSubmitCalls);

    // Further swap buffers should again be ineffective.
    swapBuffers();
    swapBuffers();
    swapBuffers();
    swapBuffers();
    swapBuffers();

    EXPECT_EQ(getPerfCounters().commandQueueSubmitCallsTotal, expectedCommandQueueSubmitCalls);
}

// Verifies that we share Texture descriptor sets between programs.
TEST_P(VulkanPerformanceCounterTest, TextureDescriptorsAreShared)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));

    ANGLE_GL_PROGRAM(testProgram1, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());
    ANGLE_GL_PROGRAM(testProgram2, essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());

    GLTexture texture1;
    glBindTexture(GL_TEXTURE_2D, texture1);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &GLColor::red);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    GLTexture texture2;
    glBindTexture(GL_TEXTURE_2D, texture2);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, &GLColor::red);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

    setupQuadVertexBuffer(0.5f, 1.0f);

    glUseProgram(testProgram1);

    ASSERT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture1);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    glBindTexture(GL_TEXTURE_2D, texture2);
    glDrawArrays(GL_TRIANGLES, 0, 6);

    ASSERT_GL_NO_ERROR();

    GLuint expectedCacheMisses = getPerfCounters().textureDescriptorSetCacheMisses;
    EXPECT_GT(expectedCacheMisses, 0u);

    glUseProgram(testProgram2);

    glBindTexture(GL_TEXTURE_2D, texture1);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    glBindTexture(GL_TEXTURE_2D, texture2);
    glDrawArrays(GL_TRIANGLES, 0, 6);

    ASSERT_GL_NO_ERROR();

    GLuint actualCacheMisses = getPerfCounters().textureDescriptorSetCacheMisses;
    EXPECT_EQ(expectedCacheMisses, actualCacheMisses);
}

// Verifies that we share Uniform Buffer descriptor sets between programs.
TEST_P(VulkanPerformanceCounterTest, UniformBufferDescriptorsAreShared)
{
    ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled(kPerfMonitorExtensionName));

    constexpr char kFS[] = R"(#version 300 es
precision mediump float;
out vec4 color;
uniform block {
   vec4 uniColor;
};

void main() {
    color = uniColor;
})";

    ANGLE_GL_PROGRAM(testProgram1, essl3_shaders::vs::Simple(), kFS);
    ANGLE_GL_PROGRAM(testProgram2, essl3_shaders::vs::Simple(), kFS);

    Vector4 red(1, 0, 0, 1);
    Vector4 green(0, 1, 0, 1);

    GLBuffer ubo1;
    glBindBuffer(GL_UNIFORM_BUFFER, ubo1);
    glBufferData(GL_UNIFORM_BUFFER, sizeof(Vector4), red.data(), GL_STATIC_DRAW);

    GLBuffer ubo2;
    glBindBuffer(GL_UNIFORM_BUFFER, ubo2);
    glBufferData(GL_UNIFORM_BUFFER, sizeof(Vector4), green.data(), GL_STATIC_DRAW);

    setupQuadVertexBuffer(0.5f, 1.0f);

    glUseProgram(testProgram1);

    ASSERT_GL_NO_ERROR();

    glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo1);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo2);
    glDrawArrays(GL_TRIANGLES, 0, 6);

    ASSERT_GL_NO_ERROR();

    GLuint expectedCacheMisses = getPerfCounters().shaderResourcesDescriptorSetCacheMisses;
    EXPECT_GT(expectedCacheMisses, 0u);

    glUseProgram(testProgram2);

    glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo1);
    glDrawArrays(GL_TRIANGLES, 0, 6);
    glBindBufferBase(GL_UNIFORM_BUFFER, 0, ubo2);
    glDrawArrays(GL_TRIANGLES, 0, 6);

    ASSERT_GL_NO_ERROR();

    GLuint actualCacheMisses = getPerfCounters().shaderResourcesDescriptorSetCacheMisses;
    EXPECT_EQ(expectedCacheMisses, actualCacheMisses);
}

ANGLE_INSTANTIATE_TEST(VulkanPerformanceCounterTest, ES3_VULKAN(), ES3_VULKAN_SWIFTSHADER());
ANGLE_INSTANTIATE_TEST(VulkanPerformanceCounterTest_ES31, ES31_VULKAN(), ES31_VULKAN_SWIFTSHADER());
ANGLE_INSTANTIATE_TEST(VulkanPerformanceCounterTest_MSAA, ES3_VULKAN(), ES3_VULKAN_SWIFTSHADER());

GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(VulkanPerformanceCounterTest_SingleBuffer);
ANGLE_INSTANTIATE_TEST(VulkanPerformanceCounterTest_SingleBuffer, ES3_VULKAN());

}  // anonymous namespace