src/tests/gl_tests/ComputeShaderTest.cpp

//
// Copyright 2016 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.
//
// ComputeShaderTest:
//   Compute shader specific tests.

#include <vector>
#include "test_utils/ANGLETest.h"
#include "test_utils/gl_raii.h"

using namespace angle;

namespace
{

class ComputeShaderTest : public ANGLETest
{
  protected:
    ComputeShaderTest() {}

    template <class T, GLint kWidth, GLint kHeight>
    void runSharedMemoryTest(const char *kCS,
                             GLenum internalFormat,
                             GLenum format,
                             const std::array<T, kWidth * kHeight> &inputData,
                             const std::array<T, kWidth * kHeight> &expectedValues)
    {
        GLTexture texture[2];
        GLFramebuffer framebuffer;

        glBindTexture(GL_TEXTURE_2D, texture[0]);
        glTexStorage2D(GL_TEXTURE_2D, 1, internalFormat, kWidth, kHeight);
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, format,
                        inputData.data());
        EXPECT_GL_NO_ERROR();

        constexpr T initData[kWidth * kHeight] = {};
        glBindTexture(GL_TEXTURE_2D, texture[1]);
        glTexStorage2D(GL_TEXTURE_2D, 1, internalFormat, kWidth, kHeight);
        glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, format, initData);
        EXPECT_GL_NO_ERROR();

        ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
        glUseProgram(program.get());

        glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, internalFormat);
        EXPECT_GL_NO_ERROR();

        glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, internalFormat);
        EXPECT_GL_NO_ERROR();

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

        glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);

        T outputValues[kWidth * kHeight] = {};
        glUseProgram(0);
        glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

        glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[1],
                               0);
        EXPECT_GL_NO_ERROR();
        glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, format, outputValues);
        EXPECT_GL_NO_ERROR();

        for (int i = 0; i < kWidth * kHeight; i++)
        {
            EXPECT_EQ(expectedValues[i], outputValues[i]);
        }
    }
};

class ComputeShaderTestES3 : public ANGLETest
{
  protected:
    ComputeShaderTestES3() {}
};

class WebGL2ComputeTest : public ComputeShaderTest
{
  protected:
    WebGL2ComputeTest() { setWebGLCompatibilityEnabled(true); }
};

// link a simple compute program. It should be successful.
TEST_P(ComputeShaderTest, LinkComputeProgram)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1) in;
void main()
{
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);

    EXPECT_GL_NO_ERROR();
}

// Link a simple compute program. Then detach the shader and dispatch compute.
// It should be successful.
TEST_P(ComputeShaderTest, DetachShaderAfterLinkSuccess)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1) in;
void main()
{
})";

    GLuint program = glCreateProgram();

    GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);
    EXPECT_NE(0u, cs);

    glAttachShader(program, cs);
    glDeleteShader(cs);

    glLinkProgram(program);
    GLint linkStatus;
    glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
    EXPECT_GL_TRUE(linkStatus);

    glDetachShader(program, cs);
    EXPECT_GL_NO_ERROR();

    glUseProgram(program);
    glDispatchCompute(8, 4, 2);
    EXPECT_GL_NO_ERROR();
}

// link a simple compute program. There is no local size and linking should fail.
TEST_P(ComputeShaderTest, LinkComputeProgramNoLocalSizeLinkError)
{
    constexpr char kCS[] = R"(#version 310 es
void main()
{
})";

    GLuint program = CompileComputeProgram(kCS, false);
    EXPECT_EQ(0u, program);

    glDeleteProgram(program);

    EXPECT_GL_NO_ERROR();
}

// link a simple compute program.
// make sure that uniforms and uniform samplers get recorded
TEST_P(ComputeShaderTest, LinkComputeProgramWithUniforms)
{
    constexpr char kCS[] = R"(#version 310 es
precision mediump sampler2D;
layout(local_size_x=1) in;
uniform int myUniformInt;
uniform sampler2D myUniformSampler;
layout(rgba32i) uniform highp writeonly iimage2D imageOut;
void main()
{
    int q = myUniformInt;
    vec4 v = textureLod(myUniformSampler, vec2(0.0), 0.0);
    imageStore(imageOut, ivec2(0), ivec4(v) * q);
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);

    GLint uniformLoc = glGetUniformLocation(program.get(), "myUniformInt");
    EXPECT_NE(-1, uniformLoc);

    uniformLoc = glGetUniformLocation(program.get(), "myUniformSampler");
    EXPECT_NE(-1, uniformLoc);

    EXPECT_GL_NO_ERROR();
}

// Attach both compute and non-compute shaders. A link time error should occur.
// OpenGL ES 3.10, 7.3 Program Objects
TEST_P(ComputeShaderTest, AttachMultipleShaders)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1) in;
void main()
{
})";

    constexpr char kVS[] = R"(#version 310 es
void main()
{
})";

    constexpr char kFS[] = R"(#version 310 es
void main()
{
})";

    GLuint program = glCreateProgram();

    GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
    GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);
    GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);

    EXPECT_NE(0u, vs);
    EXPECT_NE(0u, fs);
    EXPECT_NE(0u, cs);

    glAttachShader(program, vs);
    glDeleteShader(vs);

    glAttachShader(program, fs);
    glDeleteShader(fs);

    glAttachShader(program, cs);
    glDeleteShader(cs);

    glLinkProgram(program);

    GLint linkStatus;
    glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);

    EXPECT_GL_FALSE(linkStatus);

    EXPECT_GL_NO_ERROR();
}

// Attach a vertex, fragment and compute shader.
// Query for the number of attached shaders and check the count.
TEST_P(ComputeShaderTest, AttachmentCount)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1) in;
void main()
{
})";

    constexpr char kVS[] = R"(#version 310 es
void main()
{
})";

    constexpr char kFS[] = R"(#version 310 es
void main()
{
})";

    GLuint program = glCreateProgram();

    GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
    GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);
    GLuint cs = CompileShader(GL_COMPUTE_SHADER, kCS);

    EXPECT_NE(0u, vs);
    EXPECT_NE(0u, fs);
    EXPECT_NE(0u, cs);

    glAttachShader(program, vs);
    glDeleteShader(vs);

    glAttachShader(program, fs);
    glDeleteShader(fs);

    glAttachShader(program, cs);
    glDeleteShader(cs);

    GLint numAttachedShaders;
    glGetProgramiv(program, GL_ATTACHED_SHADERS, &numAttachedShaders);

    EXPECT_EQ(3, numAttachedShaders);

    glDeleteProgram(program);

    EXPECT_GL_NO_ERROR();
}

// Attach a compute shader and link, but start rendering.
TEST_P(ComputeShaderTest, StartRenderingWithComputeProgram)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1) in;
void main()
{
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    EXPECT_GL_NO_ERROR();

    glUseProgram(program);
    glDrawArrays(GL_POINTS, 0, 2);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}

// Attach a vertex and fragment shader and link, but dispatch compute.
TEST_P(ComputeShaderTest, DispatchComputeWithRenderingProgram)
{
    constexpr char kVS[] = R"(#version 310 es
void main() {})";

    constexpr char kFS[] = R"(#version 310 es
void main() {})";

    GLuint program = glCreateProgram();

    GLuint vs = CompileShader(GL_VERTEX_SHADER, kVS);
    GLuint fs = CompileShader(GL_FRAGMENT_SHADER, kFS);

    EXPECT_NE(0u, vs);
    EXPECT_NE(0u, fs);

    glAttachShader(program, vs);
    glDeleteShader(vs);

    glAttachShader(program, fs);
    glDeleteShader(fs);

    glLinkProgram(program);

    GLint linkStatus;
    glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
    EXPECT_GL_TRUE(linkStatus);

    EXPECT_GL_NO_ERROR();

    glUseProgram(program);
    glDispatchCompute(8, 4, 2);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);
}

// Access all compute shader special variables.
TEST_P(ComputeShaderTest, AccessAllSpecialVariables)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=4, local_size_y=3, local_size_z=2) in;
layout(rgba32ui) uniform highp writeonly uimage2D imageOut;
void main()
{
    uvec3 temp1 = gl_NumWorkGroups;
    uvec3 temp2 = gl_WorkGroupSize;
    uvec3 temp3 = gl_WorkGroupID;
    uvec3 temp4 = gl_LocalInvocationID;
    uvec3 temp5 = gl_GlobalInvocationID;
    uint  temp6 = gl_LocalInvocationIndex;
    imageStore(imageOut, ivec2(gl_LocalInvocationIndex, 0), uvec4(temp1 + temp2 + temp3 + temp4 + temp5, temp6));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
}

// Access part compute shader special variables.
TEST_P(ComputeShaderTest, AccessPartSpecialVariables)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=4, local_size_y=3, local_size_z=2) in;
layout(rgba32ui) uniform highp writeonly uimage2D imageOut;
void main()
{
    uvec3 temp1 = gl_WorkGroupSize;
    uvec3 temp2 = gl_WorkGroupID;
    uint  temp3 = gl_LocalInvocationIndex;
    imageStore(imageOut, ivec2(gl_LocalInvocationIndex, 0), uvec4(temp1 + temp2, temp3));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
}

// Use glDispatchCompute to define work group count.
TEST_P(ComputeShaderTest, DispatchCompute)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=4, local_size_y=3, local_size_z=2) in;
layout(rgba32ui) uniform highp writeonly uimage2D imageOut;
void main()
{
    uvec3 temp = gl_NumWorkGroups;
    imageStore(imageOut, ivec2(0), uvec4(temp, 0u));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);

    glUseProgram(program.get());
    glDispatchCompute(8, 4, 2);
    EXPECT_GL_NO_ERROR();
}

// Basic test for DispatchComputeIndirect.
TEST_P(ComputeShaderTest, DispatchComputeIndirect)
{
    GLTexture texture;
    GLFramebuffer framebuffer;
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) uniform highp uimage2D uImage;
void main()
{
    imageStore(uImage, ivec2(gl_WorkGroupID.x, gl_WorkGroupID.y), uvec4(100, 0, 0, 0));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    glUseProgram(program.get());
    const int kWidth = 4, kHeight = 6;
    GLuint inputValues[] = {0};

    GLBuffer buffer;
    glBindBuffer(GL_DISPATCH_INDIRECT_BUFFER, buffer);
    GLuint params[] = {kWidth, kHeight, 1};
    glBufferData(GL_DISPATCH_INDIRECT_BUFFER, sizeof(params), params, GL_STATIC_DRAW);

    glBindTexture(GL_TEXTURE_2D, texture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    inputValues);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(0, texture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glDispatchComputeIndirect(0);
    EXPECT_GL_NO_ERROR();

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    GLuint outputValues[kWidth][kHeight];
    GLuint expectedValue = 100u;
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth; i++)
    {
        for (int j = 0; j < kHeight; j++)
        {
            EXPECT_EQ(expectedValue, outputValues[i][j]);
        }
    }
}

// Use image uniform to write texture in compute shader, and verify the content is expected.
TEST_P(ComputeShaderTest, BindImageTexture)
{
    GLTexture mTexture[2];
    GLFramebuffer mFramebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) writeonly uniform highp uimage2D uImage[2];
void main()
{
    imageStore(uImage[0], ivec2(gl_LocalInvocationIndex, gl_WorkGroupID.x), uvec4(100, 0,
0, 0));
    imageStore(uImage[1], ivec2(gl_LocalInvocationIndex, gl_WorkGroupID.x), uvec4(100, 0,
0, 0));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());
    int width = 1, height = 1;
    GLuint inputValues[] = {200};

    glBindTexture(GL_TEXTURE_2D, mTexture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, width, height);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    inputValues);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(0, mTexture[0], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, mTexture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, width, height);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    inputValues);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(1, mTexture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    GLuint outputValues[2][1];
    GLuint expectedValue = 100;
    glBindFramebuffer(GL_READ_FRAMEBUFFER, mFramebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTexture[0],
                           0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, width, height, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues[0]);
    EXPECT_GL_NO_ERROR();

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTexture[1],
                           0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, width, height, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues[1]);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < width * height; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[0][i]);
        EXPECT_EQ(expectedValue, outputValues[1][i]);
    }
}

// When declare a image array without a binding qualifier, all elements are bound to unit zero.
TEST_P(ComputeShaderTest, ImageArrayWithoutBindingQualifier)
{
    ANGLE_SKIP_TEST_IF(IsD3D11());

    // TODO(xinghua.cao@intel.com): On AMD desktop OpenGL, bind two image variables to unit 0,
    // only one variable is valid.
    ANGLE_SKIP_TEST_IF(IsAMD() && IsDesktopOpenGL());

    GLTexture mTexture;
    GLFramebuffer mFramebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui) writeonly uniform highp uimage2D uImage[2];
void main()
{
    imageStore(uImage[0], ivec2(gl_LocalInvocationIndex, 0), uvec4(100, 0, 0, 0));
    imageStore(uImage[1], ivec2(gl_LocalInvocationIndex, 1), uvec4(100, 0, 0, 0));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());
    constexpr int kTextureWidth = 1, kTextureHeight = 2;
    GLuint inputValues[] = {200, 200};

    glBindTexture(GL_TEXTURE_2D, mTexture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kTextureWidth, kTextureHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kTextureWidth, kTextureHeight, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, inputValues);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(0, mTexture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, mFramebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, mTexture, 0);
    GLuint outputValues[kTextureWidth * kTextureHeight];
    glReadPixels(0, 0, kTextureWidth, kTextureHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                 outputValues);
    EXPECT_GL_NO_ERROR();

    GLuint expectedValue = 100;
    for (int i = 0; i < kTextureWidth * kTextureHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
}

// imageLoad functions
TEST_P(ComputeShaderTest, ImageLoad)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(rgba8) uniform highp readonly image2D mImage2DInput;
layout(rgba16i) uniform highp readonly iimageCube mImageCubeInput;
layout(rgba32ui) uniform highp readonly uimage3D mImage3DInput;
layout(r32i) uniform highp writeonly iimage2D imageOut;
void main()
{
    vec4 result2d = imageLoad(mImage2DInput, ivec2(gl_LocalInvocationID.xy));
    ivec4 resultCube = imageLoad(mImageCubeInput, ivec3(gl_LocalInvocationID.xyz));
    uvec4 result3d = imageLoad(mImage3DInput, ivec3(gl_LocalInvocationID.xyz));
    imageStore(imageOut, ivec2(gl_LocalInvocationIndex, 0), ivec4(result2d) + resultCube + ivec4(result3d));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    EXPECT_GL_NO_ERROR();
}

// imageStore functions
TEST_P(ComputeShaderTest, ImageStore)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(rgba16f) uniform highp writeonly imageCube mImageCubeOutput;
layout(r32f) uniform highp writeonly image3D mImage3DOutput;
layout(rgba8ui) uniform highp writeonly uimage2DArray mImage2DArrayOutput;
void main()
{
    imageStore(mImageCubeOutput, ivec3(gl_LocalInvocationID.xyz), vec4(0.0));
    imageStore(mImage3DOutput, ivec3(gl_LocalInvocationID.xyz), vec4(0.0));
    imageStore(mImage2DArrayOutput, ivec3(gl_LocalInvocationID.xyz), uvec4(0));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    EXPECT_GL_NO_ERROR();
}

// imageSize functions
TEST_P(ComputeShaderTest, ImageSize)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(rgba8) uniform highp readonly imageCube mImageCubeInput;
layout(r32i) uniform highp readonly iimage2D mImage2DInput;
layout(rgba16ui) uniform highp readonly uimage2DArray mImage2DArrayInput;
layout(r32i) uniform highp writeonly iimage2D imageOut;
void main()
{
    ivec2 sizeCube = imageSize(mImageCubeInput);
    ivec2 size2D = imageSize(mImage2DInput);
    ivec3 size2DArray = imageSize(mImage2DArrayInput);
    imageStore(imageOut, ivec2(gl_LocalInvocationIndex, 0), ivec4(sizeCube, size2D.x, size2DArray.x));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    EXPECT_GL_NO_ERROR();
}

// Test that texelFetch works well in compute shader.
TEST_P(ComputeShaderTest, TexelFetchFunction)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=16, local_size_y=16) in;
precision highp usampler2D;
uniform usampler2D tex;
layout(std140, binding = 0) buffer buf {
    uint outData[16][16];
};

void main()
{
    uint x = gl_LocalInvocationID.x;
    uint y = gl_LocalInvocationID.y;
    outData[y][x] = texelFetch(tex, ivec2(x, y), 0).x;
})";

    constexpr unsigned int kWidth  = 16;
    constexpr unsigned int kHeight = 16;
    GLTexture tex;
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    GLuint texels[kHeight][kWidth] = {{0}};
    for (unsigned int y = 0; y < kHeight; ++y)
    {
        for (unsigned int x = 0; x < kWidth; ++x)
        {
            texels[y][x] = x + y * kWidth;
        }
    }
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    texels);
    glBindTexture(GL_TEXTURE_2D, 0);

    // The array stride are rounded up to the base alignment of a vec4 for std140 layout.
    constexpr unsigned int kArrayStride = 16;
    GLBuffer ssbo;
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBufferData(GL_SHADER_STORAGE_BUFFER, kWidth * kHeight * kArrayStride, nullptr,
                 GL_STREAM_DRAW);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tex);
    glUniform1i(glGetUniformLocation(program, "tex"), 0);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);

    glDispatchCompute(1, 1, 1);

    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    const GLuint *ptr = reinterpret_cast<const GLuint *>(glMapBufferRange(
        GL_SHADER_STORAGE_BUFFER, 0, kWidth * kHeight * kArrayStride, GL_MAP_READ_BIT));
    EXPECT_GL_NO_ERROR();
    for (unsigned int idx = 0; idx < kWidth * kHeight; idx++)
    {
        EXPECT_EQ(idx, *(ptr + idx * kArrayStride / 4));
    }
}

// Test that texture function works well in compute shader.
TEST_P(ComputeShaderTest, TextureFunction)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=16, local_size_y=16) in;
precision highp usampler2D;
uniform usampler2D tex;
layout(std140, binding = 0) buffer buf {
    uint outData[16][16];
};

void main()
{
    uint x = gl_LocalInvocationID.x;
    uint y = gl_LocalInvocationID.y;
    float xCoord = float(x) / float(16);
    float yCoord = float(y) / float(16);
    outData[y][x] = texture(tex, vec2(xCoord, yCoord)).x;
})";

    constexpr unsigned int kWidth  = 16;
    constexpr unsigned int kHeight = 16;
    GLTexture tex;
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    GLuint texels[kHeight][kWidth] = {{0}};
    for (unsigned int y = 0; y < kHeight; ++y)
    {
        for (unsigned int x = 0; x < kWidth; ++x)
        {
            texels[y][x] = x + y * kWidth;
        }
    }
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    texels);
    glBindTexture(GL_TEXTURE_2D, 0);

    // The array stride are rounded up to the base alignment of a vec4 for std140 layout.
    constexpr unsigned int kArrayStride = 16;
    GLBuffer ssbo;
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBufferData(GL_SHADER_STORAGE_BUFFER, kWidth * kHeight * kArrayStride, nullptr,
                 GL_STREAM_DRAW);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tex);
    glUniform1i(glGetUniformLocation(program, "tex"), 0);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);

    glDispatchCompute(1, 1, 1);

    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    const GLuint *ptr = reinterpret_cast<const GLuint *>(glMapBufferRange(
        GL_SHADER_STORAGE_BUFFER, 0, kWidth * kHeight * kArrayStride, GL_MAP_READ_BIT));
    EXPECT_GL_NO_ERROR();
    for (unsigned int idx = 0; idx < kWidth * kHeight; idx++)
    {
        EXPECT_EQ(idx, *(ptr + idx * kArrayStride / 4));
    }
}

// Test mixed use of sampler and image.
TEST_P(ComputeShaderTest, SamplingAndImageReadWrite)
{
    GLTexture texture[3];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
precision highp usampler2D;
uniform usampler2D tex;
void main()
{
    uvec4 value_1 = texelFetch(tex, ivec2(gl_LocalInvocationID.xy), 0);
    uvec4 value_2 = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value_1 + value_2);
})";

    constexpr int kWidth = 1, kHeight = 1;
    constexpr GLuint kInputValues[3][1] = {{50}, {100}, {20}};

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[0]);
    glBindTexture(GL_TEXTURE_2D, texture[2]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[2]);
    EXPECT_GL_NO_ERROR();
    glBindTexture(GL_TEXTURE_2D, 0);

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[1]);

    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[2], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    constexpr GLuint expectedValue = 150;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[2], 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
}

// Use image uniform to read and write Texture2D in compute shader, and verify the contents.
TEST_P(ComputeShaderTest, BindImageTextureWithTexture2D)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth = 1, kHeight = 1;
    constexpr GLuint kInputValues[2][1] = {{200}, {100}};

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    constexpr GLuint expectedValue = 200;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[1], 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
}

// Use image uniform to read and write Texture2DArray in compute shader, and verify the contents.
TEST_P(ComputeShaderTest, BindImageTextureWithTexture2DArray)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=2, local_size_y=2, local_size_z=2) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2DArray uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2DArray uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec3(gl_LocalInvocationID.xyz));
    imageStore(uImage_2, ivec3(gl_LocalInvocationID.xyz), value);
})";

    constexpr int kWidth = 1, kHeight = 1, kDepth = 2;
    constexpr GLuint kInputValues[2][2] = {{200, 200}, {100, 100}};

    glBindTexture(GL_TEXTURE_2D_ARRAY, texture[0]);
    glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D_ARRAY, texture[1]);
    glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_TRUE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(1, texture[1], 0, GL_TRUE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    constexpr GLuint expectedValue = 200;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture[1], 0, 0);
    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, texture[1], 0, 1);
    EXPECT_GL_NO_ERROR();
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
    glReadBuffer(GL_COLOR_ATTACHMENT1);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
}

// Use image uniform to read and write Texture3D in compute shader, and verify the contents.
TEST_P(ComputeShaderTest, BindImageTextureWithTexture3D)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=2) in;
layout(r32ui, binding = 0) readonly uniform highp uimage3D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage3D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec3(gl_LocalInvocationID.xyz));
    imageStore(uImage_2, ivec3(gl_LocalInvocationID.xyz), value);
})";

    constexpr int kWidth = 1, kHeight = 1, kDepth = 2;
    constexpr GLuint kInputValues[2][2] = {{200, 200}, {100, 100}};

    glBindTexture(GL_TEXTURE_3D, texture[0]);
    glTexStorage3D(GL_TEXTURE_3D, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_3D, texture[1]);
    glTexStorage3D(GL_TEXTURE_3D, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_TRUE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(1, texture[1], 0, GL_TRUE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    constexpr GLuint expectedValue = 200;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture[1], 0, 0);
    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, texture[1], 0, 1);
    EXPECT_GL_NO_ERROR();
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
    glReadBuffer(GL_COLOR_ATTACHMENT1);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
}

// Use image uniform to read and write TextureCube in compute shader, and verify the contents.
TEST_P(ComputeShaderTest, BindImageTextureWithTextureCube)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimageCube uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimageCube uImage_2;
void main()
{
    for (int i = 0; i < 6; i++)
    {
        uvec4 value = imageLoad(uImage_1, ivec3(gl_LocalInvocationID.xy, i));
        imageStore(uImage_2, ivec3(gl_LocalInvocationID.xy, i), value);
    }
})";

    constexpr int kWidth = 1, kHeight = 1;
    constexpr GLuint kInputValues[2][1] = {{200}, {100}};

    glBindTexture(GL_TEXTURE_CUBE_MAP, texture[0]);
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_R32UI, kWidth, kHeight);
    for (GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X; face <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
         face++)
    {
        glTexSubImage2D(face, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                        kInputValues[0]);
    }
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_CUBE_MAP, texture[1]);
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_R32UI, kWidth, kHeight);
    for (GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X; face <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
         face++)
    {
        glTexSubImage2D(face, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                        kInputValues[1]);
    }
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_TRUE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(1, texture[1], 0, GL_TRUE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    constexpr GLuint expectedValue = 200;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    for (GLenum face = 0; face < 6; face++)
    {
        glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
                               GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, texture[1], 0);
        EXPECT_GL_NO_ERROR();
        glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
        EXPECT_GL_NO_ERROR();

        for (int i = 0; i < kWidth * kHeight; i++)
        {
            EXPECT_EQ(expectedValue, outputValues[i]);
        }
    }
}

// Use image uniform to read and write one layer of Texture2DArray in compute shader, and verify the
// contents.
TEST_P(ComputeShaderTest, BindImageTextureWithOneLayerTexture2DArray)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth = 1, kHeight = 1, kDepth = 2;
    constexpr int kResultSize           = kWidth * kHeight;
    constexpr GLuint kInputValues[2][2] = {{200, 150}, {100, 50}};
    constexpr GLuint expectedValue_1    = 200;
    constexpr GLuint expectedValue_2    = 100;
    GLuint outputValues[kResultSize];

    glBindTexture(GL_TEXTURE_2D_ARRAY, texture[0]);
    glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D_ARRAY, texture[1]);
    glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 1, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);
    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture[1], 0, 0);
    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, texture[1], 0, 1);
    EXPECT_GL_NO_ERROR();
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kResultSize; i++)
    {
        EXPECT_EQ(expectedValue_2, outputValues[i]);
    }
    glReadBuffer(GL_COLOR_ATTACHMENT1);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kResultSize; i++)
    {
        EXPECT_EQ(expectedValue_1, outputValues[i]);
    }
}

// Use image uniform to read and write one layer of Texture3D in compute shader, and verify the
// contents.
TEST_P(ComputeShaderTest, BindImageTextureWithOneLayerTexture3D)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth = 1, kHeight = 1, kDepth = 2;
    constexpr int kResultSize           = kWidth * kHeight;
    constexpr GLuint kInputValues[2][2] = {{200, 150}, {100, 50}};
    constexpr GLuint expectedValue_1    = 150;
    constexpr GLuint expectedValue_2    = 50;
    GLuint outputValues[kResultSize];

    glBindTexture(GL_TEXTURE_3D, texture[0]);
    glTexStorage3D(GL_TEXTURE_3D, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_3D, texture[1]);
    glTexStorage3D(GL_TEXTURE_3D, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 1, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);
    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texture[1], 0, 0);
    glFramebufferTextureLayer(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, texture[1], 0, 1);
    EXPECT_GL_NO_ERROR();
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kResultSize; i++)
    {
        EXPECT_EQ(expectedValue_1, outputValues[i]);
    }
    glReadBuffer(GL_COLOR_ATTACHMENT1);
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();
    for (int i = 0; i < kResultSize; i++)
    {
        EXPECT_EQ(expectedValue_2, outputValues[i]);
    }
}

// Use image uniform to read and write one layer of TextureCube in compute shader, and verify the
// contents.
TEST_P(ComputeShaderTest, BindImageTextureWithOneLayerTextureCube)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth = 1, kHeight = 1;
    constexpr int kResultSize           = kWidth * kHeight;
    constexpr GLuint kInputValues[2][1] = {{200}, {100}};
    constexpr GLuint expectedValue_1    = 200;
    constexpr GLuint expectedValue_2    = 100;
    GLuint outputValues[kResultSize];

    glBindTexture(GL_TEXTURE_CUBE_MAP, texture[0]);
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_R32UI, kWidth, kHeight);
    for (GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X; face <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
         face++)
    {
        glTexSubImage2D(face, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                        kInputValues[0]);
    }
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_CUBE_MAP, texture[1]);
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_R32UI, kWidth, kHeight);
    for (GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X; face <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
         face++)
    {
        glTexSubImage2D(face, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                        kInputValues[1]);
    }
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 3, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 4, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    for (GLenum face = 0; face < 6; face++)
    {
        glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
                               GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, texture[1], 0);
        EXPECT_GL_NO_ERROR();
        glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
        EXPECT_GL_NO_ERROR();

        if (face == 4)
        {
            for (int i = 0; i < kResultSize; i++)
            {
                EXPECT_EQ(expectedValue_1, outputValues[i]);
            }
        }
        else
        {
            for (int i = 0; i < kResultSize; i++)
            {
                EXPECT_EQ(expectedValue_2, outputValues[i]);
            }
        }
    }
}

// Test to bind kinds of texture types, bind either the entire texture
// level or a single layer or face of the face level.
TEST_P(ComputeShaderTest, BindImageTextureWithMixTextureTypes)
{
    GLTexture texture[4];
    GLFramebuffer framebuffer;
    const char csSource[] =
        R"(#version 310 es
        layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
        layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
        layout(r32ui, binding = 1) readonly uniform highp uimage2D uImage_2;
        layout(r32ui, binding = 2) readonly uniform highp uimage3D uImage_3;
        layout(r32ui, binding = 3) writeonly uniform highp uimage2D uImage_4;
        void main()
        {
            uvec4 value_1 = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
            uvec4 value_2 = imageLoad(uImage_2, ivec2(gl_LocalInvocationID.xy));
            uvec4 value_3 = imageLoad(uImage_3, ivec3(gl_LocalInvocationID.xyz));
            imageStore(uImage_4, ivec2(gl_LocalInvocationID.xy), value_1 + value_2 + value_3);
        })";

    constexpr int kWidth = 1, kHeight = 1, kDepth = 2;
    constexpr int kResultSize               = kWidth * kHeight;
    constexpr GLuint kInputValues2D[1]      = {11};
    constexpr GLuint KInputValues2DArray[2] = {23, 35};
    constexpr GLuint KInputValues3D[2]      = {102, 67};
    constexpr GLuint KInputValuesCube[1]    = {232};

    constexpr GLuint expectedValue_1 = 148;
    constexpr GLuint expectedValue_2 = 232;
    GLuint outputValues[kResultSize];

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues2D);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D_ARRAY, texture[1]);
    glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, KInputValues2DArray);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_3D, texture[2]);
    glTexStorage3D(GL_TEXTURE_3D, 1, GL_R32UI, kWidth, kHeight, kDepth);
    glTexSubImage3D(GL_TEXTURE_3D, 0, 0, 0, 0, kWidth, kHeight, kDepth, GL_RED_INTEGER,
                    GL_UNSIGNED_INT, KInputValues3D);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_CUBE_MAP, texture[3]);
    glTexStorage2D(GL_TEXTURE_CUBE_MAP, 1, GL_R32UI, kWidth, kHeight);
    for (GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X; face <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z;
         face++)
    {
        glTexSubImage2D(face, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                        KInputValuesCube);
    }
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, csSource);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_TRUE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 1, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glBindImageTexture(2, texture[2], 0, GL_TRUE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glBindImageTexture(3, texture[3], 0, GL_FALSE, 4, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();
    glDispatchCompute(1, 1, 1);
    EXPECT_GL_NO_ERROR();

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    for (GLenum face = 0; face < 6; face++)
    {
        glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
                               GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, texture[3], 0);
        EXPECT_GL_NO_ERROR();
        glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
        EXPECT_GL_NO_ERROR();

        if (face == 4)
        {
            for (int i = 0; i < kResultSize; i++)
            {
                EXPECT_EQ(expectedValue_1, outputValues[i]);
            }
        }
        else
        {
            for (int i = 0; i < kResultSize; i++)
            {
                EXPECT_EQ(expectedValue_2, outputValues[i]);
            }
        }
    }
}

// Verify an INVALID_OPERATION error is reported when querying GL_COMPUTE_WORK_GROUP_SIZE for a
// program which has not been linked successfully or which does not contain objects to form a
// compute shader.
TEST_P(ComputeShaderTest, QueryComputeWorkGroupSize)
{
    constexpr char kVS[] = R"(#version 310 es
void main()
{
})";

    constexpr char kFS[] = R"(#version 310 es
void main()
{
})";

    GLint workGroupSize[3];

    ANGLE_GL_PROGRAM(graphicsProgram, kVS, kFS);
    glGetProgramiv(graphicsProgram, GL_COMPUTE_WORK_GROUP_SIZE, workGroupSize);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    GLuint computeProgram = glCreateProgram();
    GLShader computeShader(GL_COMPUTE_SHADER);
    glAttachShader(computeProgram, computeShader);
    glLinkProgram(computeProgram);
    glDetachShader(computeProgram, computeShader);

    GLint linkStatus;
    glGetProgramiv(computeProgram, GL_LINK_STATUS, &linkStatus);
    ASSERT_GL_FALSE(linkStatus);

    glGetProgramiv(computeProgram, GL_COMPUTE_WORK_GROUP_SIZE, workGroupSize);
    EXPECT_GL_ERROR(GL_INVALID_OPERATION);

    glDeleteProgram(computeProgram);

    ASSERT_GL_NO_ERROR();
}

// Use groupMemoryBarrier and barrier to sync reads/writes order and the execution
// order of multiple shader invocations in compute shader.
TEST_P(ComputeShaderTest, groupMemoryBarrierAndBarrierTest)
{
    // TODO(xinghua.cao@intel.com): Figure out why we get this error message
    // that shader uses features not recognized by this D3D version.
    ANGLE_SKIP_TEST_IF((IsAMD() || IsNVIDIA()) && IsD3D11());

    GLTexture texture;
    GLFramebuffer framebuffer;

    // Each invocation first stores a single value in an image, then each invocation sums up
    // all the values in the image and stores the sum in the image. groupMemoryBarrier is
    // used to order reads/writes to variables stored in memory accessible to other shader
    // invocations, and barrier is used to control the relative execution order of multiple
    // shader invocations used to process a local work group.
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=2, local_size_y=2, local_size_z=1) in;
layout(r32i, binding = 0) uniform highp iimage2D image;
void main()
{
    uint x = gl_LocalInvocationID.x;
    uint y = gl_LocalInvocationID.y;
    imageStore(image, ivec2(gl_LocalInvocationID.xy), ivec4(x + y));
    groupMemoryBarrier();
    barrier();
    int sum = 0;
    for (int i = 0; i < 2; i++)
    {
        for(int j = 0; j < 2; j++)
        {
            sum += imageLoad(image, ivec2(i, j)).x;
        }
    }
    groupMemoryBarrier();
    barrier();
    imageStore(image, ivec2(gl_LocalInvocationID.xy), ivec4(sum));
})";

    constexpr int kWidth = 2, kHeight = 2;
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32I, kWidth, kHeight);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    glBindImageTexture(0, texture, 0, GL_FALSE, 0, GL_READ_WRITE, GL_R32I);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    constexpr GLuint kExpectedValue = 4;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(kExpectedValue, outputValues[i]);
    }
}

// Verify that a link error is generated when the sum of the number of active image uniforms and
// active shader storage blocks in a compute shader exceeds GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES.
TEST_P(ComputeShaderTest, ExceedCombinedShaderOutputResourcesInCS)
{
    GLint maxCombinedShaderOutputResources;
    GLint maxComputeShaderStorageBlocks;
    GLint maxComputeImageUniforms;

    glGetIntegerv(GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES, &maxCombinedShaderOutputResources);
    glGetIntegerv(GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS, &maxComputeShaderStorageBlocks);
    glGetIntegerv(GL_MAX_COMPUTE_IMAGE_UNIFORMS, &maxComputeImageUniforms);

    ANGLE_SKIP_TEST_IF(maxCombinedShaderOutputResources >=
                       maxComputeShaderStorageBlocks + maxComputeImageUniforms);

    std::ostringstream computeShaderStream;
    computeShaderStream << "#version 310 es\n"
                           "layout(local_size_x = 3, local_size_y = 1, local_size_z = 1) in;\n"
                           "layout(shared, binding = 0) buffer blockName"
                           "{\n"
                           "    uint data;\n"
                           "} instance["
                        << maxComputeShaderStorageBlocks << "];\n";

    ASSERT_GE(maxComputeImageUniforms, 4);
    int numImagesInArray  = maxComputeImageUniforms / 2;
    int numImagesNonArray = maxComputeImageUniforms - numImagesInArray;
    for (int i = 0; i < numImagesNonArray; ++i)
    {
        computeShaderStream << "layout(r32f, binding = " << i << ") uniform highp image2D image"
                            << i << ";\n";
    }

    computeShaderStream << "layout(r32f, binding = " << numImagesNonArray
                        << ") uniform highp image2D imageArray[" << numImagesInArray << "];\n";

    computeShaderStream << "void main()\n"
                           "{\n"
                           "    uint val = 0u;\n"
                           "    vec4 val2 = vec4(0.0);\n";

    for (int i = 0; i < maxComputeShaderStorageBlocks; ++i)
    {
        computeShaderStream << "    val += instance[" << i << "].data; \n";
    }

    for (int i = 0; i < numImagesNonArray; ++i)
    {
        computeShaderStream << "    val2 += imageLoad(image" << i
                            << ", ivec2(gl_LocalInvocationID.xy)); \n";
    }

    for (int i = 0; i < numImagesInArray; ++i)
    {
        computeShaderStream << "    val2 += imageLoad(imageArray[" << i << "]"
                            << ", ivec2(gl_LocalInvocationID.xy)); \n";
    }

    computeShaderStream << "    instance[0].data = val + uint(val2.x);\n"
                           "}\n";

    GLuint computeProgram = CompileComputeProgram(computeShaderStream.str().c_str());
    EXPECT_EQ(0u, computeProgram);
}

// Test that uniform block with struct member in compute shader is supported.
TEST_P(ComputeShaderTest, UniformBlockWithStructMember)
{
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(rgba8) uniform highp readonly image2D mImage2DInput;
layout(rgba8) uniform highp writeonly image2D mImage2DOutput;
struct S {
    ivec3 a;
    ivec2 b;
};

layout(std140, binding=0) uniform blockName {
    S bd;
} instanceName;
void main()
{
    ivec2 t1 = instanceName.bd.b;
    vec4 result2d = imageLoad(mImage2DInput, t1);
    imageStore(mImage2DOutput, ivec2(gl_LocalInvocationID.xy), result2d);
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    EXPECT_GL_NO_ERROR();
}

// Verify shared non-array variables can work correctly.
TEST_P(ComputeShaderTest, NonArraySharedVariable)
{
    const char kCSShader[] = R"(#version 310 es
layout (local_size_x = 2, local_size_y = 2, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;
shared uint temp;
void main()
{
    if (gl_LocalInvocationID == uvec3(0, 0, 0))
    {
        temp = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    }
    groupMemoryBarrier();
    barrier();
    if (gl_LocalInvocationID == uvec3(1, 1, 0))
    {
        imageStore(dstImage, ivec2(gl_LocalInvocationID.xy), uvec4(temp));
    }
    else
    {
        uint inputValue = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
        imageStore(dstImage, ivec2(gl_LocalInvocationID.xy), uvec4(inputValue));
    }
})";

    const std::array<GLuint, 4> inputData      = {{250, 200, 150, 100}};
    const std::array<GLuint, 4> expectedValues = {{250, 200, 150, 250}};
    runSharedMemoryTest<GLuint, 2, 2>(kCSShader, GL_R32UI, GL_UNSIGNED_INT, inputData,
                                      expectedValues);
}

// Verify shared non-struct array variables can work correctly.
TEST_P(ComputeShaderTest, NonStructArrayAsSharedVariable)
{
    const char kCSShader[] = R"(#version 310 es
layout (local_size_x = 2, local_size_y = 2, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;
shared uint sharedData[2][2];
void main()
{
    uint inputData = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    sharedData[gl_LocalInvocationID.x][gl_LocalInvocationID.y] = inputData;
    groupMemoryBarrier();
    barrier();
    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                uvec4(sharedData[gl_LocalInvocationID.y][gl_LocalInvocationID.x]));
})";

    const std::array<GLuint, 4> inputData      = {{250, 200, 150, 100}};
    const std::array<GLuint, 4> expectedValues = {{250, 150, 200, 100}};
    runSharedMemoryTest<GLuint, 2, 2>(kCSShader, GL_R32UI, GL_UNSIGNED_INT, inputData,
                                      expectedValues);
}

// Verify shared struct array variables work correctly.
TEST_P(ComputeShaderTest, StructArrayAsSharedVariable)
{
    const char kCSShader[] = R"(#version 310 es
layout (local_size_x = 2, local_size_y = 2, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;
struct SharedStruct
{
    uint data;
};
shared SharedStruct sharedData[2][2];
void main()
{
    uint inputData = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    sharedData[gl_LocalInvocationID.x][gl_LocalInvocationID.y].data = inputData;
    groupMemoryBarrier();
    barrier();
    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                uvec4(sharedData[gl_LocalInvocationID.y][gl_LocalInvocationID.x].data));
})";

    const std::array<GLuint, 4> inputData      = {{250, 200, 150, 100}};
    const std::array<GLuint, 4> expectedValues = {{250, 150, 200, 100}};
    runSharedMemoryTest<GLuint, 2, 2>(kCSShader, GL_R32UI, GL_UNSIGNED_INT, inputData,
                                      expectedValues);
}

// Verify using atomic functions without return value can work correctly.
TEST_P(ComputeShaderTest, AtomicFunctionsNoReturnValue)
{
    // TODO(jiawei.shao@intel.com): find out why this shader causes a link error on Android Nexus 5
    // bot.
    ANGLE_SKIP_TEST_IF(IsAndroid());

    const char kCSShader[] = R"(#version 310 es
layout (local_size_x = 8, local_size_y = 1, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;

const uint kSumIndex = 0u;
const uint kMinIndex = 1u;
const uint kMaxIndex = 2u;
const uint kOrIndex = 3u;
const uint kAndIndex = 4u;
const uint kXorIndex = 5u;
const uint kExchangeIndex = 6u;
const uint kCompSwapIndex = 7u;

shared highp uint results[8];

void main()
{
    if (gl_LocalInvocationID.x == kMinIndex || gl_LocalInvocationID.x == kAndIndex)
    {
        results[gl_LocalInvocationID.x] = 0xFFFFu;
    }
    else if (gl_LocalInvocationID.x == kCompSwapIndex)
    {
        results[gl_LocalInvocationID.x] = 1u;
    }
    else
    {
        results[gl_LocalInvocationID.x] = 0u;
    }
    memoryBarrierShared();
    barrier();

    uint value = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    atomicAdd(results[kSumIndex], value);
    atomicMin(results[kMinIndex], value);
    atomicMax(results[kMaxIndex], value);
    atomicOr(results[kOrIndex], value);
    atomicAnd(results[kAndIndex], value);
    atomicXor(results[kXorIndex], value);
    atomicExchange(results[kExchangeIndex], value);
    atomicCompSwap(results[kCompSwapIndex], value, 256u);
    memoryBarrierShared();
    barrier();

    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                uvec4(results[gl_LocalInvocationID.x]));
})";

    const std::array<GLuint, 8> inputData      = {{1, 2, 4, 8, 16, 32, 64, 128}};
    const std::array<GLuint, 8> expectedValues = {{255, 1, 128, 255, 0, 255, 128, 256}};
    runSharedMemoryTest<GLuint, 8, 1>(kCSShader, GL_R32UI, GL_UNSIGNED_INT, inputData,
                                      expectedValues);
}

// Verify using atomic functions in a non-initializer single assignment can work correctly.
TEST_P(ComputeShaderTest, AtomicFunctionsInNonInitializerSingleAssignment)
{
    const char kCSShader[] = R"(#version 310 es
layout (local_size_x = 9, local_size_y = 1, local_size_z = 1) in;
layout (r32i, binding = 0) readonly uniform highp iimage2D srcImage;
layout (r32i, binding = 1) writeonly uniform highp iimage2D dstImage;

shared highp int sharedVariable;

shared highp int inputData[9];
shared highp int outputData[9];

void main()
{
    int inputValue = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    inputData[gl_LocalInvocationID.x] = inputValue;
    memoryBarrierShared();
    barrier();

    if (gl_LocalInvocationID.x == 0u)
    {
        sharedVariable = 0;

        outputData[0] = atomicAdd(sharedVariable, inputData[0]);
        outputData[1] = atomicMin(sharedVariable, inputData[1]);
        outputData[2] = atomicMax(sharedVariable, inputData[2]);
        outputData[3] = atomicAnd(sharedVariable, inputData[3]);
        outputData[4] = atomicOr(sharedVariable, inputData[4]);
        outputData[5] = atomicXor(sharedVariable, inputData[5]);
        outputData[6] = atomicExchange(sharedVariable, inputData[6]);
        outputData[7] = atomicCompSwap(sharedVariable, 64, inputData[7]);
        outputData[8] = atomicAdd(sharedVariable, inputData[8]);
    }
    memoryBarrierShared();
    barrier();

    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                ivec4(outputData[gl_LocalInvocationID.x]));
})";

    const std::array<GLint, 9> inputData      = {{1, 2, 4, 8, 16, 32, 64, 128, 1}};
    const std::array<GLint, 9> expectedValues = {{0, 1, 1, 4, 0, 16, 48, 64, 128}};
    runSharedMemoryTest<GLint, 9, 1>(kCSShader, GL_R32I, GL_INT, inputData, expectedValues);
}

// Verify using atomic functions in an initializers and using unsigned int works correctly.
TEST_P(ComputeShaderTest, AtomicFunctionsInitializerWithUnsigned)
{
    constexpr char kCShader[] = R"(#version 310 es
layout (local_size_x = 9, local_size_y = 1, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;

shared highp uint sharedVariable;

shared highp uint inputData[9];
shared highp uint outputData[9];

void main()
{
    uint inputValue = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    inputData[gl_LocalInvocationID.x] = inputValue;
    memoryBarrierShared();
    barrier();

    if (gl_LocalInvocationID.x == 0u)
    {
        sharedVariable = 0u;

        uint addValue = atomicAdd(sharedVariable, inputData[0]);
        outputData[0] = addValue;
        uint minValue = atomicMin(sharedVariable, inputData[1]);
        outputData[1] = minValue;
        uint maxValue = atomicMax(sharedVariable, inputData[2]);
        outputData[2] = maxValue;
        uint andValue = atomicAnd(sharedVariable, inputData[3]);
        outputData[3] = andValue;
        uint orValue = atomicOr(sharedVariable, inputData[4]);
        outputData[4] = orValue;
        uint xorValue = atomicXor(sharedVariable, inputData[5]);
        outputData[5] = xorValue;
        uint exchangeValue = atomicExchange(sharedVariable, inputData[6]);
        outputData[6] = exchangeValue;
        uint compSwapValue = atomicCompSwap(sharedVariable, 64u, inputData[7]);
        outputData[7] = compSwapValue;
        uint sharedVariable = atomicAdd(sharedVariable, inputData[8]);
        outputData[8] = sharedVariable;

    }
    memoryBarrierShared();
    barrier();

    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                uvec4(outputData[gl_LocalInvocationID.x]));
})";

    constexpr std::array<GLuint, 9> kInputData      = {{1, 2, 4, 8, 16, 32, 64, 128, 1}};
    constexpr std::array<GLuint, 9> kExpectedValues = {{0, 1, 1, 4, 0, 16, 48, 64, 128}};
    runSharedMemoryTest<GLuint, 9, 1>(kCShader, GL_R32UI, GL_UNSIGNED_INT, kInputData,
                                      kExpectedValues);
}

// Verify using atomic functions inside expressions as unsigned int.
TEST_P(ComputeShaderTest, AtomicFunctionsReturnWithUnsigned)
{
    constexpr char kCShader[] = R"(#version 310 es
layout (local_size_x = 9, local_size_y = 1, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;

shared highp uint sharedVariable;

shared highp uint inputData[9];
shared highp uint outputData[9];

void main()
{
    uint inputValue = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    inputData[gl_LocalInvocationID.x] = inputValue;
    memoryBarrierShared();
    barrier();

    if (gl_LocalInvocationID.x == 0u)
    {
        sharedVariable = 0u;

        outputData[0] = 1u + atomicAdd(sharedVariable, inputData[0]);
        outputData[1] = 1u + atomicMin(sharedVariable, inputData[1]);
        outputData[2] = 1u + atomicMax(sharedVariable, inputData[2]);
        outputData[3] = 1u + atomicAnd(sharedVariable, inputData[3]);
        outputData[4] = 1u + atomicOr(sharedVariable, inputData[4]);
        outputData[5] = 1u + atomicXor(sharedVariable, inputData[5]);
        outputData[6] = 1u + atomicExchange(sharedVariable, inputData[6]);
        outputData[7] = 1u + atomicCompSwap(sharedVariable, 64u, inputData[7]);
        outputData[8] = 1u + atomicAdd(sharedVariable, inputData[8]);
    }
    memoryBarrierShared();
    barrier();

    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                uvec4(outputData[gl_LocalInvocationID.x]));
})";

    constexpr std::array<GLuint, 9> kInputData      = {{1, 2, 4, 8, 16, 32, 64, 128, 1}};
    constexpr std::array<GLuint, 9> kExpectedValues = {{1, 2, 2, 5, 1, 17, 49, 65, 129}};
    runSharedMemoryTest<GLuint, 9, 1>(kCShader, GL_R32UI, GL_UNSIGNED_INT, kInputData,
                                      kExpectedValues);
}

// Verify using nested atomic functions in expressions.
TEST_P(ComputeShaderTest, AtomicFunctionsReturnWithMultipleTypes)
{
    constexpr char kCShader[] = R"(#version 310 es
layout (local_size_x = 4, local_size_y = 1, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;

shared highp uint sharedVariable;
shared highp int  indexVariable;

shared highp uint inputData[4];
shared highp uint outputData[4];

void main()
{
    uint inputValue = imageLoad(srcImage, ivec2(gl_LocalInvocationID.xy)).x;
    inputData[gl_LocalInvocationID.x] = inputValue;
    memoryBarrierShared();
    barrier();

    if (gl_LocalInvocationID.x == 0u)
    {
        sharedVariable = 0u;
        indexVariable = 2;

        outputData[0] = 1u + atomicAdd(sharedVariable, inputData[atomicAdd(indexVariable, -1)]);
        outputData[1] = 1u + atomicAdd(sharedVariable, inputData[atomicAdd(indexVariable, -1)]);
        outputData[2] = 1u + atomicAdd(sharedVariable, inputData[atomicAdd(indexVariable, -1)]);
        outputData[3] = atomicAdd(sharedVariable, 0u);

    }
    memoryBarrierShared();
    barrier();

    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy),
                uvec4(outputData[gl_LocalInvocationID.x]));
})";

    constexpr std::array<GLuint, 4> kInputData      = {{1, 2, 3, 0}};
    constexpr std::array<GLuint, 4> kExpectedValues = {{1, 4, 6, 6}};
    runSharedMemoryTest<GLuint, 4, 1>(kCShader, GL_R32UI, GL_UNSIGNED_INT, kInputData,
                                      kExpectedValues);
}

// Basic uniform buffer functionality.
TEST_P(ComputeShaderTest, UniformBuffer)
{
    GLTexture texture;
    GLBuffer buffer;
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
uniform uni
{
    uvec4 value;
};
layout(rgba32ui, binding = 0) writeonly uniform highp uimage2D uImage;
void main()
{
    imageStore(uImage, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth = 1, kHeight = 1;
    constexpr GLuint kInputValues[4] = {56, 57, 58, 59};

    glBindTexture(GL_TEXTURE_2D, texture);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RGBA_INTEGER, GL_UNSIGNED_INT,
                    kInputValues);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program.get());

    GLint uniformBufferIndex = glGetUniformBlockIndex(program, "uni");
    EXPECT_NE(uniformBufferIndex, -1);
    GLuint data[4] = {201, 202, 203, 204};
    glBindBuffer(GL_UNIFORM_BUFFER, buffer);
    glBufferData(GL_UNIFORM_BUFFER, sizeof(GLuint) * 4, data, GL_STATIC_DRAW);
    glBindBufferBase(GL_UNIFORM_BUFFER, 0, buffer);
    glUniformBlockBinding(program, uniformBufferIndex, 0);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(0, texture, 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32UI);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight * 4];
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth, kHeight, GL_RGBA_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth * kHeight * 4; i++)
    {
        EXPECT_EQ(data[i], outputValues[i]);
    }
}

// Test that storing data to image and then loading the same image data works correctly.
TEST_P(ComputeShaderTest, StoreImageThenLoad)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr GLuint kInputValues[3][1] = {{300}, {200}, {100}};
    GLTexture texture[3];
    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[2]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, kInputValues[2]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);

    glDispatchCompute(1, 1, 1);
    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(0, texture[1], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[2], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);

    glDispatchCompute(1, 1, 1);
    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    EXPECT_GL_NO_ERROR();

    GLuint outputValue;
    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[2], 0);
    glReadPixels(0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, &outputValue);
    EXPECT_GL_NO_ERROR();

    EXPECT_EQ(300u, outputValue);
}

// Test that loading image data and then storing data to the same image works correctly.
TEST_P(ComputeShaderTest, LoadImageThenStore)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr GLuint kInputValues[3][1] = {{300}, {200}, {100}};
    GLTexture texture[3];
    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[2]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, 1, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, kInputValues[2]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    glUseProgram(program.get());

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);

    glDispatchCompute(1, 1, 1);
    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(0, texture[2], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[0], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);

    glDispatchCompute(1, 1, 1);
    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    EXPECT_GL_NO_ERROR();

    GLuint outputValue;
    GLFramebuffer framebuffer;
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);
    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[0], 0);
    glReadPixels(0, 0, 1, 1, GL_RED_INTEGER, GL_UNSIGNED_INT, &outputValue);
    EXPECT_GL_NO_ERROR();

    EXPECT_EQ(100u, outputValue);
}

// Test that scalar buffer variables are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksScalar)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=1) in;
layout(std140, binding = 0) buffer blockA {
    uvec3 uv;
    float f;
} instanceA;
layout(std140, binding = 1) buffer blockB {
    vec2 v;
    uint u[3];
    float f;
};
void main()
{
    f = instanceA.f;
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that vector buffer variables are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksVector)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=1) in;
layout(std140, binding = 0) buffer blockA {
    vec2 f;
} instanceA;
layout(std140, binding = 1) buffer blockB {
    vec3 f;
};
void main()
{
    f[1] = instanceA.f[0];
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that matrix buffer variables are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksMatrix)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=1) in;
layout(std140, binding = 0) buffer blockA {
    mat3x4 m;
} instanceA;
layout(std140, binding = 1) buffer blockB {
    mat3x4 m;
};
void main()
{
    m[0][1] = instanceA.m[0][1];
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that scalar array buffer variables are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksScalarArray)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(std140, binding = 0) buffer blockA {
    float f[8];
} instanceA;
layout(std140, binding = 1) buffer blockB {
    float f[8];
};
void main()
{
    f[gl_LocalInvocationIndex] = instanceA.f[gl_LocalInvocationIndex];
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that vector array buffer variables are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksVectorArray)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=4) in;
layout(std140, binding = 0) buffer blockA {
    vec2 v[4];
} instanceA;
layout(std140, binding = 1) buffer blockB {
    vec4 v[4];
};
void main()
{
    v[0][gl_LocalInvocationIndex] = instanceA.v[gl_LocalInvocationIndex][1];
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that matrix array buffer variables are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksMatrixArray)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(std140, binding = 0) buffer blockA {
    float v1[5];
    mat4 m[8];
} instanceA;
layout(std140, binding = 1) buffer blockB {
    vec2 v1[3];
    mat4 m[8];
};
void main()
{
    float data = instanceA.m[gl_LocalInvocationIndex][0][0];
    m[gl_LocalInvocationIndex][gl_LocalInvocationIndex][gl_LocalInvocationIndex] = data;
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that shader storage blocks only in assignment right is supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksInAssignmentRight)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(std140, binding = 0) buffer blockA {
    float data[8];
} instanceA;
layout(r32f, binding = 0) writeonly uniform highp image2D imageOut;

void main()
{
    float data = 1.0;
    data = instanceA.data[gl_LocalInvocationIndex];
    imageStore(imageOut, ivec2(gl_LocalInvocationID.xy), vec4(data));
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that shader storage blocks with unsized array are supported.
TEST_P(ComputeShaderTest, ShaderStorageBlocksWithUnsizedArray)
{
    const char kCSSource[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(std140, binding = 0) buffer blockA {
    float v[];
} instanceA;
layout(std140, binding = 0) buffer blockB {
    float v[];
} instanceB[1];

void main()
{
    float data = instanceA.v[gl_LocalInvocationIndex];
    instanceB[0].v[gl_LocalInvocationIndex * 2u + 1u] = data;
}
)";

    ANGLE_GL_COMPUTE_PROGRAM(program, kCSSource);
    EXPECT_GL_NO_ERROR();
}

// Test that EOpIndexDirect/EOpIndexIndirect/EOpIndexDirectStruct nodes in ssbo EOpIndexInDirect
// don't need to calculate the offset and should be translated by OutputHLSL directly.
TEST_P(ComputeShaderTest, IndexAndDotOperatorsInSSBOIndexIndirectOperator)
{
    constexpr char kComputeShaderSource[] = R"(#version 310 es
layout(local_size_x=1) in;
layout(std140, binding = 0) buffer blockA {
    float v[4];
};
layout(std140, binding = 1) buffer blockB {
    float v[4];
} instanceB[1];
struct S
{
    uvec4 index[2];
} s;
void main()
{
        s.index[0] = uvec4(0u, 1u, 2u, 3u);
    float data = v[s.index[0].y];
    instanceB[0].v[s.index[0].x] = data;
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kComputeShaderSource);
    EXPECT_GL_NO_ERROR();
}

// Test that swizzle node in non-SSBO symbol works well.
TEST_P(ComputeShaderTest, ShaderStorageBlocksWithNonSSBOSwizzle)
{
    constexpr char kComputeShaderSource[] = R"(#version 310 es
layout(local_size_x=8) in;
layout(std140, binding = 0) buffer blockA {
    float v[8];
};
layout(std140, binding = 1) buffer blockB {
    float v[8];
} instanceB[1];

void main()
{
    float data = v[gl_GlobalInvocationID.x];
    instanceB[0].v[gl_GlobalInvocationID.x] = data;
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kComputeShaderSource);
    EXPECT_GL_NO_ERROR();
}

// Test that swizzle node in SSBO symbol works well.
TEST_P(ComputeShaderTest, ShaderStorageBlocksWithSSBOSwizzle)
{
    constexpr char kComputeShaderSource[] = R"(#version 310 es
layout(local_size_x=1) in;
layout(std140, binding = 0) buffer blockA {
    vec2 v;
};
layout(std140, binding = 1) buffer blockB {
    float v;
} instanceB[1];

void main()
{
    instanceB[0].v = v.x;
})";

    ANGLE_GL_COMPUTE_PROGRAM(program, kComputeShaderSource);
    EXPECT_GL_NO_ERROR();
}

// Check that it is not possible to create a compute shader when the context does not support ES
// 3.10
TEST_P(ComputeShaderTestES3, NotSupported)
{
    GLuint computeShaderHandle = glCreateShader(GL_COMPUTE_SHADER);
    EXPECT_EQ(0u, computeShaderHandle);
    EXPECT_GL_ERROR(GL_INVALID_ENUM);
}

// The contents of shared variables should be cleared to zero at the beginning of shader execution.
TEST_P(WebGL2ComputeTest, sharedVariablesShouldBeZero)
{
    const char kCSShader[] = R"(#version 310 es
layout (local_size_x = 4, local_size_y = 4, local_size_z = 1) in;
layout (r32ui, binding = 0) readonly uniform highp uimage2D srcImage;
layout (r32ui, binding = 1) writeonly uniform highp uimage2D dstImage;
struct S {
    float f;
    int i;
    uint u;
    bool b;
    vec4 v[64];
};

shared S vars[16];
void main()
{
    S zeroS;
    zeroS.f = 0.0f;
    zeroS.i = 0;
    zeroS.u = 0u;
    zeroS.b = false;
    for (int i = 0; i < 64; i++)
    {
        zeroS.v[i] = vec4(0.0f);
    }

    uint tid = gl_LocalInvocationID.x + gl_LocalInvocationID.y * 4u;
    uint value = (zeroS == vars[tid] ? 127u : 0u);
    imageStore(dstImage, ivec2(gl_LocalInvocationID.xy), uvec4(value));
})";

    const std::array<GLuint, 16> inputData = {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}};
    const std::array<GLuint, 16> expectedValues = {
        {127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127}};
    runSharedMemoryTest<GLuint, 4, 4>(kCSShader, GL_R32UI, GL_UNSIGNED_INT, inputData,
                                      expectedValues);
}

// Test uniform dirty in compute shader, and verify the contents.
TEST_P(ComputeShaderTest, UniformDirty)
{
    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
uniform uint factor;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value * factor);
})";

    constexpr int kWidth = 1, kHeight = 1;
    constexpr GLuint kInputValues[2][1] = {{200}, {100}};

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[0]);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues[1]);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);
    EXPECT_GL_NO_ERROR();

    glUniform1ui(glGetUniformLocation(program, "factor"), 2);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);

    glUniform1ui(glGetUniformLocation(program, "factor"), 3);
    EXPECT_GL_NO_ERROR();

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth * kHeight];
    GLuint expectedValue = 600;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[1], 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth * kHeight; i++)
    {
        EXPECT_EQ(expectedValue, outputValues[i]);
    }
}

// Test storage buffer bound is unchanged, shader writes it, buffer content should be updated.
TEST_P(ComputeShaderTest, StorageBufferBoundUnchanged)
{
    // TODO(xinghua.cao@intel.com): Fix this. http://anglebug.com/3037
    ANGLE_SKIP_TEST_IF(IsD3D11());

    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=16, local_size_y=16) in;
precision highp usampler2D;
uniform usampler2D tex;
uniform uint factor;
layout(std140, binding = 0) buffer buf {
    uint outData[16][16];
};

void main()
{
    uint x = gl_LocalInvocationID.x;
    uint y = gl_LocalInvocationID.y;
    float xCoord = float(x) / float(16);
    float yCoord = float(y) / float(16);
    outData[y][x] = texture(tex, vec2(xCoord, yCoord)).x + factor;
})";

    constexpr unsigned int kWidth  = 16;
    constexpr unsigned int kHeight = 16;
    GLTexture tex;
    glBindTexture(GL_TEXTURE_2D, tex);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth, kHeight);
    GLuint texels[kHeight][kWidth] = {{0}};
    for (unsigned int y = 0; y < kHeight; ++y)
    {
        for (unsigned int x = 0; x < kWidth; ++x)
        {
            texels[y][x] = x + y * kWidth;
        }
    }
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth, kHeight, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    texels);
    glBindTexture(GL_TEXTURE_2D, 0);

    // The array stride are rounded up to the base alignment of a vec4 for std140 layout.
    constexpr unsigned int kArrayStride = 16;
    GLBuffer ssbo;
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBufferData(GL_SHADER_STORAGE_BUFFER, kWidth * kHeight * kArrayStride, nullptr,
                 GL_STREAM_DRAW);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, 0);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glActiveTexture(GL_TEXTURE0);
    glBindTexture(GL_TEXTURE_2D, tex);
    glUniform1i(glGetUniformLocation(program, "tex"), 0);
    glUniform1ui(glGetUniformLocation(program, "factor"), 2);
    glBindBuffer(GL_SHADER_STORAGE_BUFFER, ssbo);
    glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 0, ssbo);

    glDispatchCompute(1, 1, 1);

    const GLuint *ptr1 = reinterpret_cast<const GLuint *>(glMapBufferRange(
        GL_SHADER_STORAGE_BUFFER, 0, kWidth * kHeight * kArrayStride, GL_MAP_READ_BIT));
    EXPECT_GL_NO_ERROR();
    for (unsigned int idx = 0; idx < kWidth * kHeight; idx++)
    {
        EXPECT_EQ(idx + 2, *(ptr1 + idx * kArrayStride / 4));
    }
    glUnmapBuffer(GL_SHADER_STORAGE_BUFFER);
    glUniform1ui(glGetUniformLocation(program, "factor"), 3);
    glDispatchCompute(1, 1, 1);

    const GLuint *ptr2 = reinterpret_cast<const GLuint *>(glMapBufferRange(
        GL_SHADER_STORAGE_BUFFER, 0, kWidth * kHeight * kArrayStride, GL_MAP_READ_BIT));
    EXPECT_GL_NO_ERROR();
    for (unsigned int idx = 0; idx < kWidth * kHeight; idx++)
    {
        EXPECT_EQ(idx + 3, *(ptr2 + idx * kArrayStride / 4));
    }
}

// Test imageSize to access mipmap slice.
TEST_P(ComputeShaderTest, ImageSizeMipmapSlice)
{
    // TODO(xinghua.cao@intel.com): http://anglebug.com/3100
    ANGLE_SKIP_TEST_IF(IsNVIDIA() && IsD3D11());

    // TODO(xinghua.cao@intel.com): http://anglebug.com/3101
    ANGLE_SKIP_TEST_IF(IsIntel() && IsLinux());

    GLTexture texture[2];
    GLFramebuffer framebuffer;
    const char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(rgba32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    ivec2 size = imageSize(uImage_1);
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), uvec4(size, 0, 0));
})";

    constexpr int kWidth1 = 8, kHeight1 = 4, kWidth2 = 1, kHeight2 = 1;
    constexpr GLuint kInputValues[] = {0, 0, 0, 0};

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 2, GL_R32UI, kWidth1, kHeight1);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA32UI, kWidth2, kHeight2);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth2, kHeight2, GL_RGBA_INTEGER, GL_UNSIGNED_INT,
                    kInputValues);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glBindImageTexture(0, texture[0], 1, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_RGBA32UI);

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues[kWidth2 * kHeight2 * 4];
    constexpr GLuint expectedValue[] = {4, 2};
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[1], 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth2, kHeight2, GL_RGBA_INTEGER, GL_UNSIGNED_INT, outputValues);
    EXPECT_GL_NO_ERROR();

    for (int i = 0; i < kWidth2 * kHeight2; i++)
    {
        EXPECT_EQ(expectedValue[i], outputValues[i]);
        EXPECT_EQ(expectedValue[i + 1], outputValues[i + 1]);
    }
}

// Test imageLoad to access mipmap slice.
TEST_P(ComputeShaderTest, ImageLoadMipmapSlice)
{
    // TODO(xinghua.cao@intel.com): http://anglebug.com/3101
    ANGLE_SKIP_TEST_IF(IsIntel() && IsLinux());

    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth1 = 2, kHeight1 = 2, kWidth2 = 1, kHeight2 = 1;
    constexpr GLuint kInputValues11[] = {3, 3, 3, 3};
    constexpr GLuint kInputValues12[] = {2};
    constexpr GLuint kInputValues2[]  = {1};

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 2, GL_R32UI, kWidth1, kHeight1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth1, kHeight1, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues11);
    glTexSubImage2D(GL_TEXTURE_2D, 1, 0, 0, kWidth2, kHeight2, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues12);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth2, kHeight2);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth2, kHeight2, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues2);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glBindImageTexture(0, texture[0], 1, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[1], 0, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues;
    constexpr GLuint expectedValue = 2;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[1], 0);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth2, kHeight2, GL_RED_INTEGER, GL_UNSIGNED_INT, &outputValues);
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(expectedValue, outputValues);
}

// Test imageStore to access mipmap slice.
TEST_P(ComputeShaderTest, ImageStoreMipmapSlice)
{
    // TODO(xinghua.cao@intel.com): http://anglebug.com/3101
    ANGLE_SKIP_TEST_IF(IsIntel() && IsLinux());

    GLTexture texture[2];
    GLFramebuffer framebuffer;
    constexpr char kCS[] = R"(#version 310 es
layout(local_size_x=1, local_size_y=1, local_size_z=1) in;
layout(r32ui, binding = 0) readonly uniform highp uimage2D uImage_1;
layout(r32ui, binding = 1) writeonly uniform highp uimage2D uImage_2;
void main()
{
    uvec4 value = imageLoad(uImage_1, ivec2(gl_LocalInvocationID.xy));
    imageStore(uImage_2, ivec2(gl_LocalInvocationID.xy), value);
})";

    constexpr int kWidth1 = 1, kHeight1 = 1, kWidth2 = 2, kHeight2 = 2;
    constexpr GLuint kInputValues1[]  = {3};
    constexpr GLuint kInputValues21[] = {2, 2, 2, 2};
    constexpr GLuint kInputValues22[] = {1};

    glBindTexture(GL_TEXTURE_2D, texture[0]);
    glTexStorage2D(GL_TEXTURE_2D, 1, GL_R32UI, kWidth1, kHeight1);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth1, kHeight1, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues1);
    EXPECT_GL_NO_ERROR();

    glBindTexture(GL_TEXTURE_2D, texture[1]);
    glTexStorage2D(GL_TEXTURE_2D, 2, GL_R32UI, kWidth2, kHeight2);
    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, kWidth2, kHeight2, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues21);
    glTexSubImage2D(GL_TEXTURE_2D, 1, 0, 0, kWidth1, kHeight1, GL_RED_INTEGER, GL_UNSIGNED_INT,
                    kInputValues22);
    EXPECT_GL_NO_ERROR();

    ANGLE_GL_COMPUTE_PROGRAM(program, kCS);
    glUseProgram(program);

    glBindImageTexture(0, texture[0], 0, GL_FALSE, 0, GL_READ_ONLY, GL_R32UI);
    glBindImageTexture(1, texture[1], 1, GL_FALSE, 0, GL_WRITE_ONLY, GL_R32UI);

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

    glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT);
    GLuint outputValues;
    constexpr GLuint expectedValue = 3;
    glUseProgram(0);
    glBindFramebuffer(GL_READ_FRAMEBUFFER, framebuffer);

    glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture[1], 1);
    EXPECT_GL_NO_ERROR();
    glReadPixels(0, 0, kWidth1, kHeight1, GL_RED_INTEGER, GL_UNSIGNED_INT, &outputValues);
    EXPECT_GL_NO_ERROR();
    EXPECT_EQ(expectedValue, outputValues);
}

ANGLE_INSTANTIATE_TEST(ComputeShaderTest, ES31_OPENGL(), ES31_OPENGLES(), ES31_D3D11());
ANGLE_INSTANTIATE_TEST(ComputeShaderTestES3, ES3_OPENGL(), ES3_OPENGLES());
ANGLE_INSTANTIATE_TEST(WebGL2ComputeTest, ES31_D3D11());
}  // namespace