src/tests/gl_tests/ProgramBinaryTest.cpp

//
// Copyright 2015 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.
//

#include "test_utils/ANGLETest.h"

#include <memory>
#include <stdint.h>

#include "EGLWindow.h"
#include "OSWindow.h"
#include "test_utils/angle_test_configs.h"
#include "test_utils/gl_raii.h"

using namespace angle;

class ProgramBinaryTest : public ANGLETest
{
  protected:
    ProgramBinaryTest()
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    void SetUp() override
    {
        ANGLETest::SetUp();

        const std::string vertexShaderSource = SHADER_SOURCE
        (
            attribute vec4 inputAttribute;
            void main()
            {
                gl_Position = inputAttribute;
            }
        );

        const std::string fragmentShaderSource = SHADER_SOURCE
        (
            void main()
            {
                gl_FragColor = vec4(1,0,0,1);
            }
        );

        mProgram = CompileProgram(vertexShaderSource, fragmentShaderSource);
        if (mProgram == 0)
        {
            FAIL() << "shader compilation failed.";
        }

        glGenBuffers(1, &mBuffer);
        glBindBuffer(GL_ARRAY_BUFFER, mBuffer);
        glBufferData(GL_ARRAY_BUFFER, 128, nullptr, GL_STATIC_DRAW);
        glBindBuffer(GL_ARRAY_BUFFER, 0);

        ASSERT_GL_NO_ERROR();
    }

    void TearDown() override
    {
        glDeleteProgram(mProgram);
        glDeleteBuffers(1, &mBuffer);

        ANGLETest::TearDown();
    }

    GLint getAvailableProgramBinaryFormatCount() const
    {
        GLint formatCount;
        glGetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS_OES, &formatCount);
        return formatCount;
    }

    bool supported() const
    {
        if (!extensionEnabled("GL_OES_get_program_binary"))
        {
            std::cout << "Test skipped because GL_OES_get_program_binary is not available."
                      << std::endl;
            return false;
        }

        if (getAvailableProgramBinaryFormatCount() == 0)
        {
            std::cout << "Test skipped because no program binary formats are available."
                      << std::endl;
            return false;
        }

        return true;
    }

    GLuint mProgram;
    GLuint mBuffer;
};

// This tests the assumption that float attribs of different size
// should not internally cause a vertex shader recompile (for conversion).
TEST_P(ProgramBinaryTest, FloatDynamicShaderSize)
{
    if (!supported())
    {
        return;
    }

    glUseProgram(mProgram);
    glBindBuffer(GL_ARRAY_BUFFER, mBuffer);

    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 8, nullptr);
    glEnableVertexAttribArray(0);
    glDrawArrays(GL_POINTS, 0, 1);

    GLint programLength;
    glGetProgramiv(mProgram, GL_PROGRAM_BINARY_LENGTH_OES, &programLength);

    EXPECT_GL_NO_ERROR();

    for (GLsizei size = 1; size <= 3; size++)
    {
        glVertexAttribPointer(0, size, GL_FLOAT, GL_FALSE, 8, nullptr);
        glEnableVertexAttribArray(0);
        glDrawArrays(GL_POINTS, 0, 1);

        GLint newProgramLength;
        glGetProgramiv(mProgram, GL_PROGRAM_BINARY_LENGTH_OES, &newProgramLength);
        EXPECT_GL_NO_ERROR();
        EXPECT_EQ(programLength, newProgramLength);
    }
}

// Tests that switching between signed and unsigned un-normalized data doesn't trigger a bug
// in the D3D11 back-end.
TEST_P(ProgramBinaryTest, DynamicShadersSignatureBug)
{
    glUseProgram(mProgram);
    glBindBuffer(GL_ARRAY_BUFFER, mBuffer);

    GLint attribLocation = glGetAttribLocation(mProgram, "inputAttribute");
    ASSERT_NE(-1, attribLocation);
    glEnableVertexAttribArray(attribLocation);

    glVertexAttribPointer(attribLocation, 2, GL_BYTE, GL_FALSE, 0, nullptr);
    glDrawArrays(GL_POINTS, 0, 1);

    glVertexAttribPointer(attribLocation, 2, GL_UNSIGNED_BYTE, GL_FALSE, 0, nullptr);
    glDrawArrays(GL_POINTS, 0, 1);
}

// This tests the ability to successfully save and load a program binary.
TEST_P(ProgramBinaryTest, SaveAndLoadBinary)
{
    if (!supported())
    {
        return;
    }

    GLint programLength = 0;
    GLint writtenLength = 0;
    GLenum binaryFormat = 0;

    glGetProgramiv(mProgram, GL_PROGRAM_BINARY_LENGTH_OES, &programLength);
    EXPECT_GL_NO_ERROR();

    std::vector<uint8_t> binary(programLength);
    glGetProgramBinaryOES(mProgram, programLength, &writtenLength, &binaryFormat, binary.data());
    EXPECT_GL_NO_ERROR();

    // The lengths reported by glGetProgramiv and glGetProgramBinaryOES should match
    EXPECT_EQ(programLength, writtenLength);

    if (writtenLength)
    {
        GLuint program2 = glCreateProgram();
        glProgramBinaryOES(program2, binaryFormat, binary.data(), writtenLength);

        EXPECT_GL_NO_ERROR();

        GLint linkStatus;
        glGetProgramiv(program2, GL_LINK_STATUS, &linkStatus);
        if (linkStatus == 0)
        {
            GLint infoLogLength;
            glGetProgramiv(program2, GL_INFO_LOG_LENGTH, &infoLogLength);

            if (infoLogLength > 0)
            {
                std::vector<GLchar> infoLog(infoLogLength);
                glGetProgramInfoLog(program2, static_cast<GLsizei>(infoLog.size()), nullptr,
                                    &infoLog[0]);
                FAIL() << "program link failed: " << &infoLog[0];
            }
            else
            {
                FAIL() << "program link failed.";
            }
        }
        else
        {
            glUseProgram(program2);
            glBindBuffer(GL_ARRAY_BUFFER, mBuffer);

            glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 8, nullptr);
            glEnableVertexAttribArray(0);
            glDrawArrays(GL_POINTS, 0, 1);

            EXPECT_GL_NO_ERROR();
        }

        glDeleteProgram(program2);
    }
}

// Ensures that we init the compiler before calling ProgramBinary.
TEST_P(ProgramBinaryTest, CallProgramBinaryBeforeLink)
{
    if (!supported())
    {
        return;
    }

    // Initialize a simple program.
    glUseProgram(mProgram);

    GLsizei length = 0;
    glGetProgramiv(mProgram, GL_PROGRAM_BINARY_LENGTH, &length);
    ASSERT_GL_NO_ERROR();
    ASSERT_GT(length, 0);

    GLsizei readLength  = 0;
    GLenum binaryFormat = GL_NONE;
    std::vector<uint8_t> binaryBlob(length);
    glGetProgramBinaryOES(mProgram, length, &readLength, &binaryFormat, binaryBlob.data());
    ASSERT_GL_NO_ERROR();

    // Shutdown and restart GL entirely.
    TearDown();
    SetUp();

    ANGLE_GL_BINARY_OES_PROGRAM(binaryProgram, binaryBlob, binaryFormat);
    ASSERT_GL_NO_ERROR();

    drawQuad(binaryProgram, "inputAttribute", 0.5f);
    ASSERT_GL_NO_ERROR();
}

// Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
ANGLE_INSTANTIATE_TEST(ProgramBinaryTest,
                       ES2_D3D9(),
                       ES2_D3D11(),
                       ES3_D3D11(),
                       ES2_OPENGL(),
                       ES3_OPENGL());

class ProgramBinaryES3Test : public ANGLETest
{
  protected:
    void testBinaryAndUBOBlockIndexes(bool drawWithProgramFirst);
};

void ProgramBinaryES3Test::testBinaryAndUBOBlockIndexes(bool drawWithProgramFirst)
{
    // We can't run the test if no program binary formats are supported.
    GLint binaryFormatCount = 0;
    glGetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS, &binaryFormatCount);
    if (binaryFormatCount == 0)
    {
        std::cout << "Test skipped because no program binary formats available." << std::endl;
        return;
    }

    const std::string &vertexShader =
        "#version 300 es\n"
        "uniform block {\n"
        "    float f;\n"
        "};\n"
        "in vec4 position;\n"
        "out vec4 color;\n"
        "void main() {\n"
        "    gl_Position = position;\n"
        "    color = vec4(f, f, f, 1);\n"
        "}";
    const std::string &fragmentShader =
        "#version 300 es\n"
        "precision mediump float;\n"
        "in vec4 color;\n"
        "out vec4 colorOut;\n"
        "void main() {\n"
        "    colorOut = color;\n"
        "}";

    // Init and draw with the program.
    ANGLE_GL_PROGRAM(program, vertexShader, fragmentShader);

    float fData[4]   = {1.0f, 1.0f, 1.0f, 1.0f};
    GLuint bindIndex = 2;

    GLBuffer ubo;
    glBindBuffer(GL_UNIFORM_BUFFER, ubo.get());
    glBufferData(GL_UNIFORM_BUFFER, sizeof(fData), &fData, GL_STATIC_DRAW);
    glBindBufferRange(GL_UNIFORM_BUFFER, bindIndex, ubo.get(), 0, sizeof(fData));

    GLint blockIndex = glGetUniformBlockIndex(program.get(), "block");
    ASSERT_NE(-1, blockIndex);

    glUniformBlockBinding(program.get(), blockIndex, bindIndex);

    glClearColor(1.0, 0.0, 0.0, 1.0);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    if (drawWithProgramFirst)
    {
        drawQuad(program.get(), "position", 0.5f);
        ASSERT_GL_NO_ERROR();
        EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::white);
    }

    // Read back the binary.
    GLint programLength = 0;
    glGetProgramiv(program.get(), GL_PROGRAM_BINARY_LENGTH_OES, &programLength);
    ASSERT_GL_NO_ERROR();

    GLsizei readLength  = 0;
    GLenum binaryFormat = GL_NONE;
    std::vector<uint8_t> binary(programLength);
    glGetProgramBinary(program.get(), programLength, &readLength, &binaryFormat, binary.data());
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(static_cast<GLsizei>(programLength), readLength);

    // Load a new program with the binary and draw.
    ANGLE_GL_BINARY_ES3_PROGRAM(binaryProgram, binary, binaryFormat);

    glClearColor(1.0, 0.0, 0.0, 1.0);
    glClear(GL_COLOR_BUFFER_BIT);
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::red);

    drawQuad(binaryProgram.get(), "position", 0.5f);
    ASSERT_GL_NO_ERROR();
    EXPECT_PIXEL_COLOR_EQ(0, 0, GLColor::white);
}

// Tests that saving and loading a program perserves uniform block binding info.
TEST_P(ProgramBinaryES3Test, UniformBlockBindingWithDraw)
{
    testBinaryAndUBOBlockIndexes(true);
}

// Same as above, but does not do an initial draw with the program. Covers an ANGLE crash.
// http://anglebug.com/1637
TEST_P(ProgramBinaryES3Test, UniformBlockBindingNoDraw)
{
    // TODO(jmadill): Investigate Intel failure.
    // http://anglebug.com/1637
    if (IsWindows() && IsOpenGL() && IsIntel())
    {
        std::cout << "Test skipped on Windows Intel OpenGL." << std::endl;
        return;
    }

    testBinaryAndUBOBlockIndexes(false);
}

ANGLE_INSTANTIATE_TEST(ProgramBinaryES3Test, ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());

class ProgramBinaryES31Test : public ANGLETest
{
  protected:
    ProgramBinaryES31Test()
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }
};

// Tests that saving and loading a program attached with computer shader.
TEST_P(ProgramBinaryES31Test, ProgramBinaryWithComputeShader)
{
    // We can't run the test if no program binary formats are supported.
    GLint binaryFormatCount = 0;
    glGetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS, &binaryFormatCount);
    if (binaryFormatCount == 0)
    {
        std::cout << "Test skipped because no program binary formats available." << std::endl;
        return;
    }

    const std::string &computeShader =
        "#version 310 es\n"
        "layout(local_size_x=4, local_size_y=3, local_size_z=1) in;\n"
        "uniform block {\n"
        "    vec2 f;\n"
        "};\n"
        "uniform vec2 g;\n"
        "uniform highp sampler2D tex;\n"
        "void main() {\n"
        "    vec4 color = texture(tex, f + g);\n"
        "}";

    ANGLE_GL_COMPUTE_PROGRAM(program, computeShader);

    // Read back the binary.
    GLint programLength = 0;
    glGetProgramiv(program.get(), GL_PROGRAM_BINARY_LENGTH, &programLength);
    ASSERT_GL_NO_ERROR();

    GLsizei readLength  = 0;
    GLenum binaryFormat = GL_NONE;
    std::vector<uint8_t> binary(programLength);
    glGetProgramBinary(program.get(), programLength, &readLength, &binaryFormat, binary.data());
    ASSERT_GL_NO_ERROR();

    EXPECT_EQ(static_cast<GLsizei>(programLength), readLength);

    // Load a new program with the binary.
    ANGLE_GL_BINARY_ES3_PROGRAM(binaryProgram, binary, binaryFormat);

    // TODO(Xinghua): add dispatch support when available.

    ASSERT_GL_NO_ERROR();
}

ANGLE_INSTANTIATE_TEST(ProgramBinaryES31Test, ES31_D3D11(), ES31_OPENGL(), ES31_OPENGLES());

class ProgramBinaryTransformFeedbackTest : public ANGLETest
{
  protected:
    ProgramBinaryTransformFeedbackTest()
    {
        setWindowWidth(128);
        setWindowHeight(128);
        setConfigRedBits(8);
        setConfigGreenBits(8);
        setConfigBlueBits(8);
        setConfigAlphaBits(8);
    }

    void SetUp() override
    {
        ANGLETest::SetUp();

        const std::string vertexShaderSource = SHADER_SOURCE
        (   #version 300 es\n
            in vec4 inputAttribute;
            out vec4 outputVarying;
            void main()
            {
                outputVarying = inputAttribute;
            }
        );

        const std::string fragmentShaderSource = SHADER_SOURCE
        (   #version 300 es\n
            precision highp float;
            out vec4 outputColor;
            void main()
            {
                outputColor = vec4(1,0,0,1);
            }
        );

        std::vector<std::string> transformFeedbackVaryings;
        transformFeedbackVaryings.push_back("outputVarying");

        mProgram = CompileProgramWithTransformFeedback(
            vertexShaderSource, fragmentShaderSource, transformFeedbackVaryings,
            GL_SEPARATE_ATTRIBS);
        if (mProgram == 0)
        {
            FAIL() << "shader compilation failed.";
        }

        ASSERT_GL_NO_ERROR();
    }

    void TearDown() override
    {
        glDeleteProgram(mProgram);

        ANGLETest::TearDown();
    }

    GLint getAvailableProgramBinaryFormatCount() const
    {
        GLint formatCount;
        glGetIntegerv(GL_NUM_PROGRAM_BINARY_FORMATS_OES, &formatCount);
        return formatCount;
    }

    GLuint mProgram;
};

// This tests the assumption that float attribs of different size
// should not internally cause a vertex shader recompile (for conversion).
TEST_P(ProgramBinaryTransformFeedbackTest, GetTransformFeedbackVarying)
{
    if (!extensionEnabled("GL_OES_get_program_binary"))
    {
        std::cout << "Test skipped because GL_OES_get_program_binary is not available."
                  << std::endl;
        return;
    }

    if (getAvailableProgramBinaryFormatCount() == 0)
    {
        std::cout << "Test skipped because no program binary formats are available." << std::endl;
        return;
    }

    std::vector<uint8_t> binary(0);
    GLint programLength = 0;
    GLint writtenLength = 0;
    GLenum binaryFormat = 0;

    // Save the program binary out
    glGetProgramiv(mProgram, GL_PROGRAM_BINARY_LENGTH_OES, &programLength);
    ASSERT_GL_NO_ERROR();
    binary.resize(programLength);
    glGetProgramBinaryOES(mProgram, programLength, &writtenLength, &binaryFormat, binary.data());
    ASSERT_GL_NO_ERROR();

    glDeleteProgram(mProgram);

    // Load program binary
    mProgram = glCreateProgram();
    glProgramBinaryOES(mProgram, binaryFormat, binary.data(), writtenLength);

    // Ensure the loaded binary is linked
    GLint linkStatus;
    glGetProgramiv(mProgram, GL_LINK_STATUS, &linkStatus);
    EXPECT_TRUE(linkStatus != 0);

    // Query information about the transform feedback varying
    char varyingName[64];
    GLsizei varyingSize = 0;
    GLenum varyingType = GL_NONE;

    glGetTransformFeedbackVarying(mProgram, 0, 64, &writtenLength, &varyingSize, &varyingType, varyingName);
    EXPECT_GL_NO_ERROR();

    EXPECT_EQ(13, writtenLength);
    EXPECT_STREQ("outputVarying", varyingName);
    EXPECT_EQ(1, varyingSize);
    EXPECT_GLENUM_EQ(GL_FLOAT_VEC4, varyingType);

    EXPECT_GL_NO_ERROR();
}

// Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
ANGLE_INSTANTIATE_TEST(ProgramBinaryTransformFeedbackTest,
                       ES3_D3D11(),
                       ES3_OPENGL());

// For the ProgramBinariesAcrossPlatforms tests, we need two sets of params:
// - a set to save the program binary
// - a set to load the program binary
// We combine these into one struct extending PlatformParameters so we can reuse existing ANGLE test macros
struct PlatformsWithLinkResult : PlatformParameters
{
    PlatformsWithLinkResult(PlatformParameters saveParams, PlatformParameters loadParamsIn, bool expectedLinkResultIn)
    {
        majorVersion = saveParams.majorVersion;
        minorVersion = saveParams.minorVersion;
        eglParameters = saveParams.eglParameters;
        loadParams = loadParamsIn;
        expectedLinkResult = expectedLinkResultIn;
    }

    PlatformParameters loadParams;
    bool expectedLinkResult;
};

// Provide a custom gtest parameter name function for PlatformsWithLinkResult
// to avoid returning the same parameter name twice. Such a conflict would happen
// between ES2_D3D11_to_ES2D3D11 and ES2_D3D11_to_ES3D3D11 as they were both
// named ES2_D3D11
std::ostream &operator<<(std::ostream& stream, const PlatformsWithLinkResult &platform)
{
    const PlatformParameters &platform1 = platform;
    const PlatformParameters &platform2 = platform.loadParams;
    stream << platform1 << "_to_" << platform2;
    return stream;
}

class ProgramBinariesAcrossPlatforms : public testing::TestWithParam<PlatformsWithLinkResult>
{
  public:
    void SetUp() override
    {
        mOSWindow = CreateOSWindow();
        bool result = mOSWindow->initialize("ProgramBinariesAcrossRenderersTests", 100, 100);

        if (result == false)
        {
            FAIL() << "Failed to create OS window";
        }
    }

    EGLWindow *createAndInitEGLWindow(angle::PlatformParameters &param)
    {
        EGLWindow *eglWindow =
            new EGLWindow(param.majorVersion, param.minorVersion, param.eglParameters);
        bool result = eglWindow->initializeGL(mOSWindow);
        if (result == false)
        {
            SafeDelete(eglWindow);
            eglWindow = nullptr;
        }

        return eglWindow;
    }

    void destroyEGLWindow(EGLWindow **eglWindow)
    {
        ASSERT_NE(nullptr, *eglWindow);
        (*eglWindow)->destroyGL();
        SafeDelete(*eglWindow);
        *eglWindow = nullptr;
    }

    GLuint createES2ProgramFromSource()
    {
        const std::string testVertexShaderSource = SHADER_SOURCE
        (
            attribute highp vec4 position;

            void main(void)
            {
                gl_Position = position;
            }
        );

        const std::string testFragmentShaderSource = SHADER_SOURCE
        (
            void main(void)
            {
                gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
            }
        );

        return CompileProgram(testVertexShaderSource, testFragmentShaderSource);
    }

    GLuint createES3ProgramFromSource()
    {
        const std::string testVertexShaderSource = SHADER_SOURCE
        (   #version 300 es\n
            precision highp float;
            in highp vec4 position;

            void main(void)
            {
                gl_Position = position;
            }
        );

        const std::string testFragmentShaderSource = SHADER_SOURCE
        (   #version 300 es \n
            precision highp float;
            out vec4 out_FragColor;

            void main(void)
            {
                out_FragColor = vec4(1.0, 0.0, 0.0, 1.0);
            }
        );

        return CompileProgram(testVertexShaderSource, testFragmentShaderSource);
    }

    void drawWithProgram(GLuint program)
    {
        glClearColor(0, 0, 0, 1);
        glClear(GL_COLOR_BUFFER_BIT);

        GLint positionLocation = glGetAttribLocation(program, "position");

        glUseProgram(program);

        const GLfloat vertices[] =
        {
            -1.0f,  1.0f, 0.5f,
            -1.0f, -1.0f, 0.5f,
             1.0f, -1.0f, 0.5f,

            -1.0f,  1.0f, 0.5f,
             1.0f, -1.0f, 0.5f,
             1.0f,  1.0f, 0.5f,
        };

        glVertexAttribPointer(positionLocation, 3, GL_FLOAT, GL_FALSE, 0, vertices);
        glEnableVertexAttribArray(positionLocation);

        glDrawArrays(GL_TRIANGLES, 0, 6);

        glDisableVertexAttribArray(positionLocation);
        glVertexAttribPointer(positionLocation, 4, GL_FLOAT, GL_FALSE, 0, nullptr);

        EXPECT_PIXEL_EQ(mOSWindow->getWidth() / 2, mOSWindow->getHeight() / 2, 255, 0, 0, 255);
    }

    void TearDown() override
    {
        mOSWindow->destroy();
        SafeDelete(mOSWindow);
    }

    OSWindow *mOSWindow;
};

// Tries to create a program binary using one set of platform params, then load it using a different sent of params
TEST_P(ProgramBinariesAcrossPlatforms, CreateAndReloadBinary)
{
    angle::PlatformParameters firstRenderer  = GetParam();
    angle::PlatformParameters secondRenderer = GetParam().loadParams;
    bool expectedLinkResult                  = GetParam().expectedLinkResult;

    if (!(IsPlatformAvailable(firstRenderer)))
    {
        std::cout << "First renderer not supported, skipping test";
        return;
    }

    if (!(IsPlatformAvailable(secondRenderer)))
    {
        std::cout << "Second renderer not supported, skipping test";
        return;
    }

    EGLWindow *eglWindow = nullptr;
    std::vector<uint8_t> binary(0);
    GLuint program = 0;

    GLint programLength = 0;
    GLint writtenLength = 0;
    GLenum binaryFormat = 0;

    // Create a EGL window with the first renderer
    eglWindow = createAndInitEGLWindow(firstRenderer);
    if (eglWindow == nullptr)
    {
        FAIL() << "Failed to create EGL window";
        return;
    }

    // If the test is trying to use both the default GPU and WARP, but the default GPU *IS* WARP,
    // then our expectations for the test results will be invalid.
    if (firstRenderer.eglParameters.deviceType != EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE &&
        secondRenderer.eglParameters.deviceType == EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE)
    {
        std::string rendererString = std::string(reinterpret_cast<const char*>(glGetString(GL_RENDERER)));
        std::transform(rendererString.begin(), rendererString.end(), rendererString.begin(), ::tolower);

        auto basicRenderPos = rendererString.find(std::string("microsoft basic render"));
        auto softwareAdapterPos = rendererString.find(std::string("software adapter"));

        if (basicRenderPos != std::string::npos || softwareAdapterPos != std::string::npos)
        {
            // The first renderer is using WARP, even though we didn't explictly request it
            // We should skip this test
            std::cout << "Test skipped on when default GPU is WARP." << std::endl;
            return;
        }
    }

    // Create a program
    if (firstRenderer.majorVersion == 3)
    {
        program = createES3ProgramFromSource();
    }
    else
    {
        program = createES2ProgramFromSource();
    }

    if (program == 0)
    {
        destroyEGLWindow(&eglWindow);
        FAIL() << "Failed to create program from source";
    }

    // Draw using the program to ensure it works as expected
    drawWithProgram(program);
    EXPECT_GL_NO_ERROR();

    // Save the program binary out from this renderer
    glGetProgramiv(program, GL_PROGRAM_BINARY_LENGTH_OES, &programLength);
    EXPECT_GL_NO_ERROR();
    binary.resize(programLength);
    glGetProgramBinaryOES(program, programLength, &writtenLength, &binaryFormat, binary.data());
    EXPECT_GL_NO_ERROR();

    // Destroy the first renderer
    glDeleteProgram(program);
    destroyEGLWindow(&eglWindow);

    // Create an EGL window with the second renderer
    eglWindow = createAndInitEGLWindow(secondRenderer);
    if (eglWindow == nullptr)
    {
        FAIL() << "Failed to create EGL window";
        return;
    }

    program = glCreateProgram();
    glProgramBinaryOES(program, binaryFormat, binary.data(), writtenLength);

    GLint linkStatus;
    glGetProgramiv(program, GL_LINK_STATUS, &linkStatus);
    EXPECT_EQ(expectedLinkResult, (linkStatus != 0));

    if (linkStatus != 0)
    {
        // If the link was successful, then we should try to draw using the program to ensure it works as expected
        drawWithProgram(program);
        EXPECT_GL_NO_ERROR();
    }

    // Destroy the second renderer
    glDeleteProgram(program);
    destroyEGLWindow(&eglWindow);
}

// clang-format off
ANGLE_INSTANTIATE_TEST(ProgramBinariesAcrossPlatforms,
                       //                     | Save the program   | Load the program      | Expected
                       //                     | using these params | using these params    | link result
                       PlatformsWithLinkResult(ES2_D3D11(),         ES2_D3D11(),            true         ), // Loading + reloading binary should work
                       PlatformsWithLinkResult(ES3_D3D11(),         ES3_D3D11(),            true         ), // Loading + reloading binary should work
                       PlatformsWithLinkResult(ES2_D3D11_FL11_0(),  ES2_D3D11_FL9_3(),      false        ), // Switching feature level shouldn't work
                       PlatformsWithLinkResult(ES2_D3D11(),         ES2_D3D11_WARP(),       false        ), // Switching from hardware to software shouldn't work
                       PlatformsWithLinkResult(ES2_D3D11_FL9_3(),   ES2_D3D11_FL9_3_WARP(), false        ), // Switching from hardware to software shouldn't work for FL9 either
                       PlatformsWithLinkResult(ES2_D3D11(),         ES2_D3D9(),             false        ), // Switching from D3D11 to D3D9 shouldn't work
                       PlatformsWithLinkResult(ES2_D3D9(),          ES2_D3D11(),            false        ), // Switching from D3D9 to D3D11 shouldn't work
                       PlatformsWithLinkResult(ES2_D3D11(),         ES3_D3D11(),            false        ), // Switching to newer client version shouldn't work
                       );
// clang-format on