Context.cpp

Branch :
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Commit
Author : Jamie Madill
Date : 2017-10-21 09:56:01
Hash : 76e471e9
Message : Vulkan: Implement basic uniforms. This implementation adds one descriptor set with two bindings: one for default vertex uniforms and the other for fragment. It adds two corresponding uniform buffers, and the logic for updating the descriptor sets bound to Vulkan. It doesn't handle much in the way of synchronization and dependency management, or uniform update. If there are only vertex or fragment uniforms the empty uniform buffer is omitted from the descriptor set. If both are missing, there is no descriptor set bound. Note that as our implementation progresses we might not be able to initialize our descriptor sets at link time, due to streaming in uniform data. BUG=angleproject:2167 Change-Id: I4ce4c3879ab454114df43bfac8d87ddf817fc045 Reviewed-on: https://chromium-review.googlesource.com/706340 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
src/libANGLE/Context.cpp
//
// Copyright (c) 2002-2014 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.
//

// Context.cpp: Implements the gl::Context class, managing all GL state and performing
// rendering operations. It is the GLES2 specific implementation of EGLContext.

#include "libANGLE/Context.h"

#include <string.h>
#include <iterator>
#include <sstream>
#include <vector>

#include "common/matrix_utils.h"
#include "common/platform.h"
#include "common/utilities.h"
#include "common/version.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Compiler.h"
#include "libANGLE/Display.h"
#include "libANGLE/Fence.h"
#include "libANGLE/Framebuffer.h"
#include "libANGLE/FramebufferAttachment.h"
#include "libANGLE/Path.h"
#include "libANGLE/Program.h"
#include "libANGLE/ProgramPipeline.h"
#include "libANGLE/Query.h"
#include "libANGLE/Renderbuffer.h"
#include "libANGLE/ResourceManager.h"
#include "libANGLE/Sampler.h"
#include "libANGLE/Surface.h"
#include "libANGLE/Texture.h"
#include "libANGLE/TransformFeedback.h"
#include "libANGLE/VertexArray.h"
#include "libANGLE/Workarounds.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/queryconversions.h"
#include "libANGLE/queryutils.h"
#include "libANGLE/renderer/ContextImpl.h"
#include "libANGLE/renderer/EGLImplFactory.h"
#include "libANGLE/validationES.h"

namespace
{

#define ANGLE_HANDLE_ERR(X) \
    handleError(X);         \
    return;
#define ANGLE_CONTEXT_TRY(EXPR) ANGLE_TRY_TEMPLATE(EXPR, ANGLE_HANDLE_ERR);

template <typename T>
std::vector<gl::Path *> GatherPaths(gl::PathManager &resourceManager,
                                    GLsizei numPaths,
                                    const void *paths,
                                    GLuint pathBase)
{
    std::vector<gl::Path *> ret;
    ret.reserve(numPaths);

    const auto *nameArray = static_cast<const T *>(paths);

    for (GLsizei i = 0; i < numPaths; ++i)
    {
        const GLuint pathName = nameArray[i] + pathBase;

        ret.push_back(resourceManager.getPath(pathName));
    }

    return ret;
}

std::vector<gl::Path *> GatherPaths(gl::PathManager &resourceManager,
                                    GLsizei numPaths,
                                    GLenum pathNameType,
                                    const void *paths,
                                    GLuint pathBase)
{
    switch (pathNameType)
    {
        case GL_UNSIGNED_BYTE:
            return GatherPaths<GLubyte>(resourceManager, numPaths, paths, pathBase);

        case GL_BYTE:
            return GatherPaths<GLbyte>(resourceManager, numPaths, paths, pathBase);

        case GL_UNSIGNED_SHORT:
            return GatherPaths<GLushort>(resourceManager, numPaths, paths, pathBase);

        case GL_SHORT:
            return GatherPaths<GLshort>(resourceManager, numPaths, paths, pathBase);

        case GL_UNSIGNED_INT:
            return GatherPaths<GLuint>(resourceManager, numPaths, paths, pathBase);

        case GL_INT:
            return GatherPaths<GLint>(resourceManager, numPaths, paths, pathBase);
    }

    UNREACHABLE();
    return std::vector<gl::Path *>();
}

template <typename T>
gl::Error GetQueryObjectParameter(gl::Query *query, GLenum pname, T *params)
{
    ASSERT(query != nullptr);

    switch (pname)
    {
        case GL_QUERY_RESULT_EXT:
            return query->getResult(params);
        case GL_QUERY_RESULT_AVAILABLE_EXT:
        {
            bool available;
            gl::Error error = query->isResultAvailable(&available);
            if (!error.isError())
            {
                *params = gl::CastFromStateValue<T>(pname, static_cast<GLuint>(available));
            }
            return error;
        }
        default:
            UNREACHABLE();
            return gl::InternalError() << "Unreachable Error";
    }
}

void MarkTransformFeedbackBufferUsage(gl::TransformFeedback *transformFeedback)
{
    if (transformFeedback && transformFeedback->isActive() && !transformFeedback->isPaused())
    {
        for (size_t tfBufferIndex = 0; tfBufferIndex < transformFeedback->getIndexedBufferCount();
             tfBufferIndex++)
        {
            const gl::OffsetBindingPointer<gl::Buffer> &buffer =
                transformFeedback->getIndexedBuffer(tfBufferIndex);
            if (buffer.get() != nullptr)
            {
                buffer->onTransformFeedback();
            }
        }
    }
}

// Attribute map queries.
EGLint GetClientMajorVersion(const egl::AttributeMap &attribs)
{
    return static_cast<EGLint>(attribs.get(EGL_CONTEXT_CLIENT_VERSION, 1));
}

EGLint GetClientMinorVersion(const egl::AttributeMap &attribs)
{
    return static_cast<EGLint>(attribs.get(EGL_CONTEXT_MINOR_VERSION, 0));
}

gl::Version GetClientVersion(const egl::AttributeMap &attribs)
{
    return gl::Version(GetClientMajorVersion(attribs), GetClientMinorVersion(attribs));
}

GLenum GetResetStrategy(const egl::AttributeMap &attribs)
{
    EGLAttrib attrib = attribs.get(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT,
                                   EGL_NO_RESET_NOTIFICATION_EXT);
    switch (attrib)
    {
        case EGL_NO_RESET_NOTIFICATION:
            return GL_NO_RESET_NOTIFICATION_EXT;
        case EGL_LOSE_CONTEXT_ON_RESET:
            return GL_LOSE_CONTEXT_ON_RESET_EXT;
        default:
            UNREACHABLE();
            return GL_NONE;
    }
}

bool GetRobustAccess(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT, EGL_FALSE) == EGL_TRUE) ||
           ((attribs.get(EGL_CONTEXT_FLAGS_KHR, 0) & EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR) !=
            0);
}

bool GetDebug(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_CONTEXT_OPENGL_DEBUG, EGL_FALSE) == EGL_TRUE) ||
           ((attribs.get(EGL_CONTEXT_FLAGS_KHR, 0) & EGL_CONTEXT_OPENGL_DEBUG_BIT_KHR) != 0);
}

bool GetNoError(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_CONTEXT_OPENGL_NO_ERROR_KHR, EGL_FALSE) == EGL_TRUE);
}

bool GetWebGLContext(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_CONTEXT_WEBGL_COMPATIBILITY_ANGLE, EGL_FALSE) == EGL_TRUE);
}

bool GetBindGeneratesResource(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_CONTEXT_BIND_GENERATES_RESOURCE_CHROMIUM, EGL_TRUE) == EGL_TRUE);
}

bool GetClientArraysEnabled(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_CONTEXT_CLIENT_ARRAYS_ENABLED_ANGLE, EGL_TRUE) == EGL_TRUE);
}

bool GetRobustResourceInit(const egl::AttributeMap &attribs)
{
    return (attribs.get(EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE, EGL_FALSE) == EGL_TRUE);
}

std::string GetObjectLabelFromPointer(GLsizei length, const GLchar *label)
{
    std::string labelName;
    if (label != nullptr)
    {
        size_t labelLength = length < 0 ? strlen(label) : length;
        labelName          = std::string(label, labelLength);
    }
    return labelName;
}

void GetObjectLabelBase(const std::string &objectLabel,
                        GLsizei bufSize,
                        GLsizei *length,
                        GLchar *label)
{
    size_t writeLength = objectLabel.length();
    if (label != nullptr && bufSize > 0)
    {
        writeLength = std::min(static_cast<size_t>(bufSize) - 1, objectLabel.length());
        std::copy(objectLabel.begin(), objectLabel.begin() + writeLength, label);
        label[writeLength] = '\0';
    }

    if (length != nullptr)
    {
        *length = static_cast<GLsizei>(writeLength);
    }
}

template <typename CapT, typename MaxT>
void LimitCap(CapT *cap, MaxT maximum)
{
    *cap = std::min(*cap, static_cast<CapT>(maximum));
}

}  // anonymous namespace

namespace gl
{

Context::Context(rx::EGLImplFactory *implFactory,
                 const egl::Config *config,
                 const Context *shareContext,
                 TextureManager *shareTextures,
                 MemoryProgramCache *memoryProgramCache,
                 const egl::AttributeMap &attribs,
                 const egl::DisplayExtensions &displayExtensions)

    : ValidationContext(shareContext,
                        shareTextures,
                        GetClientVersion(attribs),
                        &mGLState,
                        mCaps,
                        mTextureCaps,
                        mExtensions,
                        mLimitations,
                        GetNoError(attribs)),
      mImplementation(implFactory->createContext(mState)),
      mCompiler(),
      mConfig(config),
      mClientType(EGL_OPENGL_ES_API),
      mHasBeenCurrent(false),
      mContextLost(false),
      mResetStatus(GL_NO_ERROR),
      mContextLostForced(false),
      mResetStrategy(GetResetStrategy(attribs)),
      mRobustAccess(GetRobustAccess(attribs)),
      mCurrentSurface(static_cast<egl::Surface *>(EGL_NO_SURFACE)),
      mCurrentDisplay(static_cast<egl::Display *>(EGL_NO_DISPLAY)),
      mSurfacelessFramebuffer(nullptr),
      mWebGLContext(GetWebGLContext(attribs)),
      mMemoryProgramCache(memoryProgramCache),
      mScratchBuffer(1000u),
      mZeroFilledBuffer(1000u)
{
    mImplementation->setMemoryProgramCache(memoryProgramCache);

    bool robustResourceInit = GetRobustResourceInit(attribs);
    initCaps(displayExtensions, robustResourceInit);
    initWorkarounds();

    mGLState.initialize(this, GetDebug(attribs), GetBindGeneratesResource(attribs),
                        GetClientArraysEnabled(attribs), robustResourceInit,
                        mMemoryProgramCache != nullptr);

    mFenceNVHandleAllocator.setBaseHandle(0);

    // [OpenGL ES 2.0.24] section 3.7 page 83:
    // In the initial state, TEXTURE_2D and TEXTURE_CUBE_MAP have twodimensional
    // and cube map texture state vectors respectively associated with them.
    // In order that access to these initial textures not be lost, they are treated as texture
    // objects all of whose names are 0.

    Texture *zeroTexture2D = new Texture(mImplementation.get(), 0, GL_TEXTURE_2D);
    mZeroTextures[GL_TEXTURE_2D].set(this, zeroTexture2D);

    Texture *zeroTextureCube = new Texture(mImplementation.get(), 0, GL_TEXTURE_CUBE_MAP);
    mZeroTextures[GL_TEXTURE_CUBE_MAP].set(this, zeroTextureCube);

    if (getClientVersion() >= Version(3, 0))
    {
        // TODO: These could also be enabled via extension
        Texture *zeroTexture3D = new Texture(mImplementation.get(), 0, GL_TEXTURE_3D);
        mZeroTextures[GL_TEXTURE_3D].set(this, zeroTexture3D);

        Texture *zeroTexture2DArray = new Texture(mImplementation.get(), 0, GL_TEXTURE_2D_ARRAY);
        mZeroTextures[GL_TEXTURE_2D_ARRAY].set(this, zeroTexture2DArray);
    }
    if (getClientVersion() >= Version(3, 1))
    {
        Texture *zeroTexture2DMultisample =
            new Texture(mImplementation.get(), 0, GL_TEXTURE_2D_MULTISAMPLE);
        mZeroTextures[GL_TEXTURE_2D_MULTISAMPLE].set(this, zeroTexture2DMultisample);

        bindGenericAtomicCounterBuffer(0);
        for (unsigned int i = 0; i < mCaps.maxAtomicCounterBufferBindings; i++)
        {
            bindIndexedAtomicCounterBuffer(0, i, 0, 0);
        }

        bindGenericShaderStorageBuffer(0);
        for (unsigned int i = 0; i < mCaps.maxShaderStorageBufferBindings; i++)
        {
            bindIndexedShaderStorageBuffer(0, i, 0, 0);
        }
    }

    if (mExtensions.textureRectangle)
    {
        Texture *zeroTextureRectangle =
            new Texture(mImplementation.get(), 0, GL_TEXTURE_RECTANGLE_ANGLE);
        mZeroTextures[GL_TEXTURE_RECTANGLE_ANGLE].set(this, zeroTextureRectangle);
    }

    if (mExtensions.eglImageExternal || mExtensions.eglStreamConsumerExternal)
    {
        Texture *zeroTextureExternal =
            new Texture(mImplementation.get(), 0, GL_TEXTURE_EXTERNAL_OES);
        mZeroTextures[GL_TEXTURE_EXTERNAL_OES].set(this, zeroTextureExternal);
    }

    mGLState.initializeZeroTextures(this, mZeroTextures);

    bindVertexArray(0);
    bindArrayBuffer(0);
    bindDrawIndirectBuffer(0);
    bindElementArrayBuffer(0);

    bindRenderbuffer(GL_RENDERBUFFER, 0);

    bindGenericUniformBuffer(0);
    for (unsigned int i = 0; i < mCaps.maxUniformBufferBindings; i++)
    {
        bindIndexedUniformBuffer(0, i, 0, -1);
    }

    bindCopyReadBuffer(0);
    bindCopyWriteBuffer(0);
    bindPixelPackBuffer(0);
    bindPixelUnpackBuffer(0);

    if (getClientVersion() >= Version(3, 0))
    {
        // [OpenGL ES 3.0.2] section 2.14.1 pg 85:
        // In the initial state, a default transform feedback object is bound and treated as
        // a transform feedback object with a name of zero. That object is bound any time
        // BindTransformFeedback is called with id of zero
        bindTransformFeedback(GL_TRANSFORM_FEEDBACK, 0);
    }

    // Initialize dirty bit masks
    // TODO(jmadill): additional ES3 state
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_ALIGNMENT);
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_ROW_LENGTH);
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_IMAGE_HEIGHT);
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_SKIP_IMAGES);
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_SKIP_ROWS);
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_SKIP_PIXELS);
    mTexImageDirtyBits.set(State::DIRTY_BIT_UNPACK_BUFFER_BINDING);
    // No dirty objects.

    // Readpixels uses the pack state and read FBO
    mReadPixelsDirtyBits.set(State::DIRTY_BIT_PACK_ALIGNMENT);
    mReadPixelsDirtyBits.set(State::DIRTY_BIT_PACK_REVERSE_ROW_ORDER);
    mReadPixelsDirtyBits.set(State::DIRTY_BIT_PACK_ROW_LENGTH);
    mReadPixelsDirtyBits.set(State::DIRTY_BIT_PACK_SKIP_ROWS);
    mReadPixelsDirtyBits.set(State::DIRTY_BIT_PACK_SKIP_PIXELS);
    mReadPixelsDirtyBits.set(State::DIRTY_BIT_PACK_BUFFER_BINDING);
    mReadPixelsDirtyObjects.set(State::DIRTY_OBJECT_READ_FRAMEBUFFER);

    mClearDirtyBits.set(State::DIRTY_BIT_RASTERIZER_DISCARD_ENABLED);
    mClearDirtyBits.set(State::DIRTY_BIT_SCISSOR_TEST_ENABLED);
    mClearDirtyBits.set(State::DIRTY_BIT_SCISSOR);
    mClearDirtyBits.set(State::DIRTY_BIT_VIEWPORT);
    mClearDirtyBits.set(State::DIRTY_BIT_CLEAR_COLOR);
    mClearDirtyBits.set(State::DIRTY_BIT_CLEAR_DEPTH);
    mClearDirtyBits.set(State::DIRTY_BIT_CLEAR_STENCIL);
    mClearDirtyBits.set(State::DIRTY_BIT_COLOR_MASK);
    mClearDirtyBits.set(State::DIRTY_BIT_DEPTH_MASK);
    mClearDirtyBits.set(State::DIRTY_BIT_STENCIL_WRITEMASK_FRONT);
    mClearDirtyBits.set(State::DIRTY_BIT_STENCIL_WRITEMASK_BACK);
    mClearDirtyObjects.set(State::DIRTY_OBJECT_DRAW_FRAMEBUFFER);

    mBlitDirtyBits.set(State::DIRTY_BIT_SCISSOR_TEST_ENABLED);
    mBlitDirtyBits.set(State::DIRTY_BIT_SCISSOR);
    mBlitDirtyBits.set(State::DIRTY_BIT_FRAMEBUFFER_SRGB);
    mBlitDirtyObjects.set(State::DIRTY_OBJECT_READ_FRAMEBUFFER);
    mBlitDirtyObjects.set(State::DIRTY_OBJECT_DRAW_FRAMEBUFFER);

    handleError(mImplementation->initialize());
}

egl::Error Context::onDestroy(const egl::Display *display)
{
    for (auto fence : mFenceNVMap)
    {
        SafeDelete(fence.second);
    }
    mFenceNVMap.clear();

    for (auto query : mQueryMap)
    {
        if (query.second != nullptr)
        {
            query.second->release(this);
        }
    }
    mQueryMap.clear();

    for (auto vertexArray : mVertexArrayMap)
    {
        if (vertexArray.second)
        {
            vertexArray.second->onDestroy(this);
        }
    }
    mVertexArrayMap.clear();

    for (auto transformFeedback : mTransformFeedbackMap)
    {
        if (transformFeedback.second != nullptr)
        {
            transformFeedback.second->release(this);
        }
    }
    mTransformFeedbackMap.clear();

    for (auto &zeroTexture : mZeroTextures)
    {
        ANGLE_TRY(zeroTexture.second->onDestroy(this));
        zeroTexture.second.set(this, nullptr);
    }
    mZeroTextures.clear();

    SafeDelete(mSurfacelessFramebuffer);

    ANGLE_TRY(releaseSurface(display));
    releaseShaderCompiler();

    mGLState.reset(this);

    mState.mBuffers->release(this);
    mState.mShaderPrograms->release(this);
    mState.mTextures->release(this);
    mState.mRenderbuffers->release(this);
    mState.mSamplers->release(this);
    mState.mSyncs->release(this);
    mState.mPaths->release(this);
    mState.mFramebuffers->release(this);
    mState.mPipelines->release(this);

    mImplementation->onDestroy(this);

    return egl::NoError();
}

Context::~Context()
{
}

egl::Error Context::makeCurrent(egl::Display *display, egl::Surface *surface)
{
    mCurrentDisplay = display;

    if (!mHasBeenCurrent)
    {
        initRendererString();
        initVersionStrings();
        initExtensionStrings();

        int width  = 0;
        int height = 0;
        if (surface != nullptr)
        {
            width  = surface->getWidth();
            height = surface->getHeight();
        }

        mGLState.setViewportParams(0, 0, width, height);
        mGLState.setScissorParams(0, 0, width, height);

        mHasBeenCurrent = true;
    }

    // TODO(jmadill): Rework this when we support ContextImpl
    mGLState.setAllDirtyBits();
    mGLState.setAllDirtyObjects();

    ANGLE_TRY(releaseSurface(display));

    Framebuffer *newDefault = nullptr;
    if (surface != nullptr)
    {
        ANGLE_TRY(surface->setIsCurrent(this, true));
        mCurrentSurface = surface;
        newDefault      = surface->getDefaultFramebuffer();
    }
    else
    {
        if (mSurfacelessFramebuffer == nullptr)
        {
            mSurfacelessFramebuffer = new Framebuffer(mImplementation.get());
        }

        newDefault = mSurfacelessFramebuffer;
    }

    // Update default framebuffer, the binding of the previous default
    // framebuffer (or lack of) will have a nullptr.
    {
        if (mGLState.getReadFramebuffer() == nullptr)
        {
            mGLState.setReadFramebufferBinding(newDefault);
        }
        if (mGLState.getDrawFramebuffer() == nullptr)
        {
            mGLState.setDrawFramebufferBinding(newDefault);
        }
        mState.mFramebuffers->setDefaultFramebuffer(newDefault);
    }

    // Notify the renderer of a context switch
    mImplementation->onMakeCurrent(this);
    return egl::NoError();
}

egl::Error Context::releaseSurface(const egl::Display *display)
{
    // Remove the default framebuffer
    Framebuffer *currentDefault = nullptr;
    if (mCurrentSurface != nullptr)
    {
        currentDefault = mCurrentSurface->getDefaultFramebuffer();
    }
    else if (mSurfacelessFramebuffer != nullptr)
    {
        currentDefault = mSurfacelessFramebuffer;
    }

    if (mGLState.getReadFramebuffer() == currentDefault)
    {
        mGLState.setReadFramebufferBinding(nullptr);
    }
    if (mGLState.getDrawFramebuffer() == currentDefault)
    {
        mGLState.setDrawFramebufferBinding(nullptr);
    }
    mState.mFramebuffers->setDefaultFramebuffer(nullptr);

    if (mCurrentSurface)
    {
        ANGLE_TRY(mCurrentSurface->setIsCurrent(this, false));
        mCurrentSurface = nullptr;
    }

    return egl::NoError();
}

GLuint Context::createBuffer()
{
    return mState.mBuffers->createBuffer();
}

GLuint Context::createProgram()
{
    return mState.mShaderPrograms->createProgram(mImplementation.get());
}

GLuint Context::createShader(GLenum type)
{
    return mState.mShaderPrograms->createShader(mImplementation.get(), mLimitations, type);
}

GLuint Context::createTexture()
{
    return mState.mTextures->createTexture();
}

GLuint Context::createRenderbuffer()
{
    return mState.mRenderbuffers->createRenderbuffer();
}

GLuint Context::createPaths(GLsizei range)
{
    auto resultOrError = mState.mPaths->createPaths(mImplementation.get(), range);
    if (resultOrError.isError())
    {
        handleError(resultOrError.getError());
        return 0;
    }
    return resultOrError.getResult();
}

// Returns an unused framebuffer name
GLuint Context::createFramebuffer()
{
    return mState.mFramebuffers->createFramebuffer();
}

GLuint Context::createFenceNV()
{
    GLuint handle = mFenceNVHandleAllocator.allocate();
    mFenceNVMap.assign(handle, new FenceNV(mImplementation->createFenceNV()));
    return handle;
}

GLuint Context::createProgramPipeline()
{
    return mState.mPipelines->createProgramPipeline();
}

void Context::deleteBuffer(GLuint buffer)
{
    if (mState.mBuffers->getBuffer(buffer))
    {
        detachBuffer(buffer);
    }

    mState.mBuffers->deleteObject(this, buffer);
}

void Context::deleteShader(GLuint shader)
{
    mState.mShaderPrograms->deleteShader(this, shader);
}

void Context::deleteProgram(GLuint program)
{
    mState.mShaderPrograms->deleteProgram(this, program);
}

void Context::deleteTexture(GLuint texture)
{
    if (mState.mTextures->getTexture(texture))
    {
        detachTexture(texture);
    }

    mState.mTextures->deleteObject(this, texture);
}

void Context::deleteRenderbuffer(GLuint renderbuffer)
{
    if (mState.mRenderbuffers->getRenderbuffer(renderbuffer))
    {
        detachRenderbuffer(renderbuffer);
    }

    mState.mRenderbuffers->deleteObject(this, renderbuffer);
}

void Context::deleteSync(GLsync sync)
{
    // The spec specifies the underlying Fence object is not deleted until all current
    // wait commands finish. However, since the name becomes invalid, we cannot query the fence,
    // and since our API is currently designed for being called from a single thread, we can delete
    // the fence immediately.
    mState.mSyncs->deleteObject(this, static_cast<GLuint>(reinterpret_cast<uintptr_t>(sync)));
}

void Context::deleteProgramPipeline(GLuint pipeline)
{
    if (mState.mPipelines->getProgramPipeline(pipeline))
    {
        detachProgramPipeline(pipeline);
    }

    mState.mPipelines->deleteObject(this, pipeline);
}

void Context::deletePaths(GLuint first, GLsizei range)
{
    mState.mPaths->deletePaths(first, range);
}

bool Context::hasPathData(GLuint path) const
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (pathObj == nullptr)
        return false;

    return pathObj->hasPathData();
}

bool Context::hasPath(GLuint path) const
{
    return mState.mPaths->hasPath(path);
}

void Context::setPathCommands(GLuint path,
                              GLsizei numCommands,
                              const GLubyte *commands,
                              GLsizei numCoords,
                              GLenum coordType,
                              const void *coords)
{
    auto *pathObject = mState.mPaths->getPath(path);

    handleError(pathObject->setCommands(numCommands, commands, numCoords, coordType, coords));
}

void Context::setPathParameterf(GLuint path, GLenum pname, GLfloat value)
{
    auto *pathObj = mState.mPaths->getPath(path);

    switch (pname)
    {
        case GL_PATH_STROKE_WIDTH_CHROMIUM:
            pathObj->setStrokeWidth(value);
            break;
        case GL_PATH_END_CAPS_CHROMIUM:
            pathObj->setEndCaps(static_cast<GLenum>(value));
            break;
        case GL_PATH_JOIN_STYLE_CHROMIUM:
            pathObj->setJoinStyle(static_cast<GLenum>(value));
            break;
        case GL_PATH_MITER_LIMIT_CHROMIUM:
            pathObj->setMiterLimit(value);
            break;
        case GL_PATH_STROKE_BOUND_CHROMIUM:
            pathObj->setStrokeBound(value);
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void Context::getPathParameterfv(GLuint path, GLenum pname, GLfloat *value) const
{
    const auto *pathObj = mState.mPaths->getPath(path);

    switch (pname)
    {
        case GL_PATH_STROKE_WIDTH_CHROMIUM:
            *value = pathObj->getStrokeWidth();
            break;
        case GL_PATH_END_CAPS_CHROMIUM:
            *value = static_cast<GLfloat>(pathObj->getEndCaps());
            break;
        case GL_PATH_JOIN_STYLE_CHROMIUM:
            *value = static_cast<GLfloat>(pathObj->getJoinStyle());
            break;
        case GL_PATH_MITER_LIMIT_CHROMIUM:
            *value = pathObj->getMiterLimit();
            break;
        case GL_PATH_STROKE_BOUND_CHROMIUM:
            *value = pathObj->getStrokeBound();
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void Context::setPathStencilFunc(GLenum func, GLint ref, GLuint mask)
{
    mGLState.setPathStencilFunc(func, ref, mask);
}

void Context::deleteFramebuffer(GLuint framebuffer)
{
    if (mState.mFramebuffers->getFramebuffer(framebuffer))
    {
        detachFramebuffer(framebuffer);
    }

    mState.mFramebuffers->deleteObject(this, framebuffer);
}

void Context::deleteFenceNV(GLuint fence)
{
    FenceNV *fenceObject = nullptr;
    if (mFenceNVMap.erase(fence, &fenceObject))
    {
        mFenceNVHandleAllocator.release(fence);
        delete fenceObject;
    }
}

Buffer *Context::getBuffer(GLuint handle) const
{
    return mState.mBuffers->getBuffer(handle);
}

Texture *Context::getTexture(GLuint handle) const
{
    return mState.mTextures->getTexture(handle);
}

Renderbuffer *Context::getRenderbuffer(GLuint handle) const
{
    return mState.mRenderbuffers->getRenderbuffer(handle);
}

Sync *Context::getSync(GLsync handle) const
{
    return mState.mSyncs->getSync(static_cast<GLuint>(reinterpret_cast<uintptr_t>(handle)));
}

VertexArray *Context::getVertexArray(GLuint handle) const
{
    return mVertexArrayMap.query(handle);
}

Sampler *Context::getSampler(GLuint handle) const
{
    return mState.mSamplers->getSampler(handle);
}

TransformFeedback *Context::getTransformFeedback(GLuint handle) const
{
    return mTransformFeedbackMap.query(handle);
}

ProgramPipeline *Context::getProgramPipeline(GLuint handle) const
{
    return mState.mPipelines->getProgramPipeline(handle);
}

LabeledObject *Context::getLabeledObject(GLenum identifier, GLuint name) const
{
    switch (identifier)
    {
        case GL_BUFFER:
            return getBuffer(name);
        case GL_SHADER:
            return getShader(name);
        case GL_PROGRAM:
            return getProgram(name);
        case GL_VERTEX_ARRAY:
            return getVertexArray(name);
        case GL_QUERY:
            return getQuery(name);
        case GL_TRANSFORM_FEEDBACK:
            return getTransformFeedback(name);
        case GL_SAMPLER:
            return getSampler(name);
        case GL_TEXTURE:
            return getTexture(name);
        case GL_RENDERBUFFER:
            return getRenderbuffer(name);
        case GL_FRAMEBUFFER:
            return getFramebuffer(name);
        default:
            UNREACHABLE();
            return nullptr;
    }
}

LabeledObject *Context::getLabeledObjectFromPtr(const void *ptr) const
{
    return getSync(reinterpret_cast<GLsync>(const_cast<void *>(ptr)));
}

void Context::objectLabel(GLenum identifier, GLuint name, GLsizei length, const GLchar *label)
{
    LabeledObject *object = getLabeledObject(identifier, name);
    ASSERT(object != nullptr);

    std::string labelName = GetObjectLabelFromPointer(length, label);
    object->setLabel(labelName);

    // TODO(jmadill): Determine if the object is dirty based on 'name'. Conservatively assume the
    // specified object is active until we do this.
    mGLState.setObjectDirty(identifier);
}

void Context::objectPtrLabel(const void *ptr, GLsizei length, const GLchar *label)
{
    LabeledObject *object = getLabeledObjectFromPtr(ptr);
    ASSERT(object != nullptr);

    std::string labelName = GetObjectLabelFromPointer(length, label);
    object->setLabel(labelName);
}

void Context::getObjectLabel(GLenum identifier,
                             GLuint name,
                             GLsizei bufSize,
                             GLsizei *length,
                             GLchar *label) const
{
    LabeledObject *object = getLabeledObject(identifier, name);
    ASSERT(object != nullptr);

    const std::string &objectLabel = object->getLabel();
    GetObjectLabelBase(objectLabel, bufSize, length, label);
}

void Context::getObjectPtrLabel(const void *ptr,
                                GLsizei bufSize,
                                GLsizei *length,
                                GLchar *label) const
{
    LabeledObject *object = getLabeledObjectFromPtr(ptr);
    ASSERT(object != nullptr);

    const std::string &objectLabel = object->getLabel();
    GetObjectLabelBase(objectLabel, bufSize, length, label);
}

bool Context::isSampler(GLuint samplerName) const
{
    return mState.mSamplers->isSampler(samplerName);
}

void Context::bindArrayBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setArrayBufferBinding(this, buffer);
}

void Context::bindDrawIndirectBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setDrawIndirectBufferBinding(this, buffer);
}

void Context::bindElementArrayBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setElementArrayBuffer(this, buffer);
}

void Context::bindTexture(GLenum target, GLuint handle)
{
    Texture *texture = nullptr;

    if (handle == 0)
    {
        texture = mZeroTextures[target].get();
    }
    else
    {
        texture = mState.mTextures->checkTextureAllocation(mImplementation.get(), handle, target);
    }

    ASSERT(texture);
    mGLState.setSamplerTexture(this, target, texture);
}

void Context::bindReadFramebuffer(GLuint framebufferHandle)
{
    Framebuffer *framebuffer = mState.mFramebuffers->checkFramebufferAllocation(
        mImplementation.get(), mCaps, framebufferHandle);
    mGLState.setReadFramebufferBinding(framebuffer);
}

void Context::bindDrawFramebuffer(GLuint framebufferHandle)
{
    Framebuffer *framebuffer = mState.mFramebuffers->checkFramebufferAllocation(
        mImplementation.get(), mCaps, framebufferHandle);
    mGLState.setDrawFramebufferBinding(framebuffer);
}

void Context::bindVertexArray(GLuint vertexArrayHandle)
{
    VertexArray *vertexArray = checkVertexArrayAllocation(vertexArrayHandle);
    mGLState.setVertexArrayBinding(vertexArray);
}

void Context::bindVertexBuffer(GLuint bindingIndex,
                               GLuint bufferHandle,
                               GLintptr offset,
                               GLsizei stride)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.bindVertexBuffer(this, bindingIndex, buffer, offset, stride);
}

void Context::bindSampler(GLuint textureUnit, GLuint samplerHandle)
{
    ASSERT(textureUnit < mCaps.maxCombinedTextureImageUnits);
    Sampler *sampler =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), samplerHandle);
    mGLState.setSamplerBinding(this, textureUnit, sampler);
}

void Context::bindImageTexture(GLuint unit,
                               GLuint texture,
                               GLint level,
                               GLboolean layered,
                               GLint layer,
                               GLenum access,
                               GLenum format)
{
    Texture *tex = mState.mTextures->getTexture(texture);
    mGLState.setImageUnit(this, unit, tex, level, layered, layer, access, format);
}

void Context::bindGenericUniformBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setGenericUniformBufferBinding(this, buffer);
}

void Context::bindIndexedUniformBuffer(GLuint bufferHandle,
                                       GLuint index,
                                       GLintptr offset,
                                       GLsizeiptr size)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setIndexedUniformBufferBinding(this, index, buffer, offset, size);
}

void Context::bindGenericTransformFeedbackBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.getCurrentTransformFeedback()->bindGenericBuffer(this, buffer);
}

void Context::bindIndexedTransformFeedbackBuffer(GLuint bufferHandle,
                                                 GLuint index,
                                                 GLintptr offset,
                                                 GLsizeiptr size)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.getCurrentTransformFeedback()->bindIndexedBuffer(this, index, buffer, offset, size);
}

void Context::bindGenericAtomicCounterBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setGenericAtomicCounterBufferBinding(this, buffer);
}

void Context::bindIndexedAtomicCounterBuffer(GLuint bufferHandle,
                                             GLuint index,
                                             GLintptr offset,
                                             GLsizeiptr size)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setIndexedAtomicCounterBufferBinding(this, index, buffer, offset, size);
}

void Context::bindGenericShaderStorageBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setGenericShaderStorageBufferBinding(this, buffer);
}

void Context::bindIndexedShaderStorageBuffer(GLuint bufferHandle,
                                             GLuint index,
                                             GLintptr offset,
                                             GLsizeiptr size)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setIndexedShaderStorageBufferBinding(this, index, buffer, offset, size);
}

void Context::bindCopyReadBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setCopyReadBufferBinding(this, buffer);
}

void Context::bindCopyWriteBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setCopyWriteBufferBinding(this, buffer);
}

void Context::bindPixelPackBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setPixelPackBufferBinding(this, buffer);
}

void Context::bindPixelUnpackBuffer(GLuint bufferHandle)
{
    Buffer *buffer = mState.mBuffers->checkBufferAllocation(mImplementation.get(), bufferHandle);
    mGLState.setPixelUnpackBufferBinding(this, buffer);
}

void Context::useProgram(GLuint program)
{
    mGLState.setProgram(this, getProgram(program));
}

void Context::bindTransformFeedback(GLenum target, GLuint transformFeedbackHandle)
{
    ASSERT(target == GL_TRANSFORM_FEEDBACK);
    TransformFeedback *transformFeedback =
        checkTransformFeedbackAllocation(transformFeedbackHandle);
    mGLState.setTransformFeedbackBinding(this, transformFeedback);
}

void Context::bindProgramPipeline(GLuint pipelineHandle)
{
    ProgramPipeline *pipeline =
        mState.mPipelines->checkProgramPipelineAllocation(mImplementation.get(), pipelineHandle);
    mGLState.setProgramPipelineBinding(this, pipeline);
}

void Context::beginQuery(GLenum target, GLuint query)
{
    Query *queryObject = getQuery(query, true, target);
    ASSERT(queryObject);

    // begin query
    ANGLE_CONTEXT_TRY(queryObject->begin());

    // set query as active for specified target only if begin succeeded
    mGLState.setActiveQuery(this, target, queryObject);
}

void Context::endQuery(GLenum target)
{
    Query *queryObject = mGLState.getActiveQuery(target);
    ASSERT(queryObject);

    handleError(queryObject->end());

    // Always unbind the query, even if there was an error. This may delete the query object.
    mGLState.setActiveQuery(this, target, nullptr);
}

void Context::queryCounter(GLuint id, GLenum target)
{
    ASSERT(target == GL_TIMESTAMP_EXT);

    Query *queryObject = getQuery(id, true, target);
    ASSERT(queryObject);

    handleError(queryObject->queryCounter());
}

void Context::getQueryiv(GLenum target, GLenum pname, GLint *params)
{
    switch (pname)
    {
        case GL_CURRENT_QUERY_EXT:
            params[0] = mGLState.getActiveQueryId(target);
            break;
        case GL_QUERY_COUNTER_BITS_EXT:
            switch (target)
            {
                case GL_TIME_ELAPSED_EXT:
                    params[0] = getExtensions().queryCounterBitsTimeElapsed;
                    break;
                case GL_TIMESTAMP_EXT:
                    params[0] = getExtensions().queryCounterBitsTimestamp;
                    break;
                default:
                    UNREACHABLE();
                    params[0] = 0;
                    break;
            }
            break;
        default:
            UNREACHABLE();
            return;
    }
}

void Context::getQueryObjectiv(GLuint id, GLenum pname, GLint *params)
{
    handleError(GetQueryObjectParameter(getQuery(id), pname, params));
}

void Context::getQueryObjectuiv(GLuint id, GLenum pname, GLuint *params)
{
    handleError(GetQueryObjectParameter(getQuery(id), pname, params));
}

void Context::getQueryObjecti64v(GLuint id, GLenum pname, GLint64 *params)
{
    handleError(GetQueryObjectParameter(getQuery(id), pname, params));
}

void Context::getQueryObjectui64v(GLuint id, GLenum pname, GLuint64 *params)
{
    handleError(GetQueryObjectParameter(getQuery(id), pname, params));
}

Framebuffer *Context::getFramebuffer(GLuint handle) const
{
    return mState.mFramebuffers->getFramebuffer(handle);
}

FenceNV *Context::getFenceNV(GLuint handle)
{
    return mFenceNVMap.query(handle);
}

Query *Context::getQuery(GLuint handle, bool create, GLenum type)
{
    if (!mQueryMap.contains(handle))
    {
        return nullptr;
    }

    Query *query = mQueryMap.query(handle);
    if (!query && create)
    {
        query = new Query(mImplementation->createQuery(type), handle);
        query->addRef();
        mQueryMap.assign(handle, query);
    }
    return query;
}

Query *Context::getQuery(GLuint handle) const
{
    return mQueryMap.query(handle);
}

Texture *Context::getTargetTexture(GLenum target) const
{
    ASSERT(ValidTextureTarget(this, target) || ValidTextureExternalTarget(this, target));
    return mGLState.getTargetTexture(target);
}

Texture *Context::getSamplerTexture(unsigned int sampler, GLenum type) const
{
    return mGLState.getSamplerTexture(sampler, type);
}

Compiler *Context::getCompiler() const
{
    if (mCompiler.get() == nullptr)
    {
        mCompiler.set(this, new Compiler(mImplementation.get(), mState));
    }
    return mCompiler.get();
}

void Context::getBooleanvImpl(GLenum pname, GLboolean *params)
{
    switch (pname)
    {
        case GL_SHADER_COMPILER:
            *params = GL_TRUE;
            break;
        case GL_CONTEXT_ROBUST_ACCESS_EXT:
            *params = mRobustAccess ? GL_TRUE : GL_FALSE;
            break;
        default:
            mGLState.getBooleanv(pname, params);
            break;
    }
}

void Context::getFloatvImpl(GLenum pname, GLfloat *params)
{
    // Queries about context capabilities and maximums are answered by Context.
    // Queries about current GL state values are answered by State.
    switch (pname)
    {
        case GL_ALIASED_LINE_WIDTH_RANGE:
            params[0] = mCaps.minAliasedLineWidth;
            params[1] = mCaps.maxAliasedLineWidth;
            break;
        case GL_ALIASED_POINT_SIZE_RANGE:
            params[0] = mCaps.minAliasedPointSize;
            params[1] = mCaps.maxAliasedPointSize;
            break;
        case GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT:
            ASSERT(mExtensions.textureFilterAnisotropic);
            *params = mExtensions.maxTextureAnisotropy;
            break;
        case GL_MAX_TEXTURE_LOD_BIAS:
            *params = mCaps.maxLODBias;
            break;

        case GL_PATH_MODELVIEW_MATRIX_CHROMIUM:
        case GL_PATH_PROJECTION_MATRIX_CHROMIUM:
        {
            ASSERT(mExtensions.pathRendering);
            const GLfloat *m = mGLState.getPathRenderingMatrix(pname);
            memcpy(params, m, 16 * sizeof(GLfloat));
        }
        break;

        default:
            mGLState.getFloatv(pname, params);
            break;
    }
}

void Context::getIntegervImpl(GLenum pname, GLint *params)
{
    // Queries about context capabilities and maximums are answered by Context.
    // Queries about current GL state values are answered by State.

    switch (pname)
    {
        case GL_MAX_VERTEX_ATTRIBS:
            *params = mCaps.maxVertexAttributes;
            break;
        case GL_MAX_VERTEX_UNIFORM_VECTORS:
            *params = mCaps.maxVertexUniformVectors;
            break;
        case GL_MAX_VERTEX_UNIFORM_COMPONENTS:
            *params = mCaps.maxVertexUniformComponents;
            break;
        case GL_MAX_VARYING_VECTORS:
            *params = mCaps.maxVaryingVectors;
            break;
        case GL_MAX_VARYING_COMPONENTS:
            *params = mCaps.maxVertexOutputComponents;
            break;
        case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
            *params = mCaps.maxCombinedTextureImageUnits;
            break;
        case GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS:
            *params = mCaps.maxVertexTextureImageUnits;
            break;
        case GL_MAX_TEXTURE_IMAGE_UNITS:
            *params = mCaps.maxTextureImageUnits;
            break;
        case GL_MAX_FRAGMENT_UNIFORM_VECTORS:
            *params = mCaps.maxFragmentUniformVectors;
            break;
        case GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
            *params = mCaps.maxFragmentUniformComponents;
            break;
        case GL_MAX_RENDERBUFFER_SIZE:
            *params = mCaps.maxRenderbufferSize;
            break;
        case GL_MAX_COLOR_ATTACHMENTS_EXT:
            *params = mCaps.maxColorAttachments;
            break;
        case GL_MAX_DRAW_BUFFERS_EXT:
            *params = mCaps.maxDrawBuffers;
            break;
        // case GL_FRAMEBUFFER_BINDING:                    // now equivalent to
        // GL_DRAW_FRAMEBUFFER_BINDING_ANGLE
        case GL_SUBPIXEL_BITS:
            *params = 4;
            break;
        case GL_MAX_TEXTURE_SIZE:
            *params = mCaps.max2DTextureSize;
            break;
        case GL_MAX_RECTANGLE_TEXTURE_SIZE_ANGLE:
            *params = mCaps.maxRectangleTextureSize;
            break;
        case GL_MAX_CUBE_MAP_TEXTURE_SIZE:
            *params = mCaps.maxCubeMapTextureSize;
            break;
        case GL_MAX_3D_TEXTURE_SIZE:
            *params = mCaps.max3DTextureSize;
            break;
        case GL_MAX_ARRAY_TEXTURE_LAYERS:
            *params = mCaps.maxArrayTextureLayers;
            break;
        case GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT:
            *params = mCaps.uniformBufferOffsetAlignment;
            break;
        case GL_MAX_UNIFORM_BUFFER_BINDINGS:
            *params = mCaps.maxUniformBufferBindings;
            break;
        case GL_MAX_VERTEX_UNIFORM_BLOCKS:
            *params = mCaps.maxVertexUniformBlocks;
            break;
        case GL_MAX_FRAGMENT_UNIFORM_BLOCKS:
            *params = mCaps.maxFragmentUniformBlocks;
            break;
        case GL_MAX_COMBINED_UNIFORM_BLOCKS:
            *params = mCaps.maxCombinedTextureImageUnits;
            break;
        case GL_MAX_VERTEX_OUTPUT_COMPONENTS:
            *params = mCaps.maxVertexOutputComponents;
            break;
        case GL_MAX_FRAGMENT_INPUT_COMPONENTS:
            *params = mCaps.maxFragmentInputComponents;
            break;
        case GL_MIN_PROGRAM_TEXEL_OFFSET:
            *params = mCaps.minProgramTexelOffset;
            break;
        case GL_MAX_PROGRAM_TEXEL_OFFSET:
            *params = mCaps.maxProgramTexelOffset;
            break;
        case GL_MAJOR_VERSION:
            *params = getClientVersion().major;
            break;
        case GL_MINOR_VERSION:
            *params = getClientVersion().minor;
            break;
        case GL_MAX_ELEMENTS_INDICES:
            *params = mCaps.maxElementsIndices;
            break;
        case GL_MAX_ELEMENTS_VERTICES:
            *params = mCaps.maxElementsVertices;
            break;
        case GL_MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS:
            *params = mCaps.maxTransformFeedbackInterleavedComponents;
            break;
        case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:
            *params = mCaps.maxTransformFeedbackSeparateAttributes;
            break;
        case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS:
            *params = mCaps.maxTransformFeedbackSeparateComponents;
            break;
        case GL_NUM_COMPRESSED_TEXTURE_FORMATS:
            *params = static_cast<GLint>(mCaps.compressedTextureFormats.size());
            break;
        case GL_MAX_SAMPLES_ANGLE:
            *params = mCaps.maxSamples;
            break;
        case GL_MAX_VIEWPORT_DIMS:
        {
            params[0] = mCaps.maxViewportWidth;
            params[1] = mCaps.maxViewportHeight;
        }
        break;
        case GL_COMPRESSED_TEXTURE_FORMATS:
            std::copy(mCaps.compressedTextureFormats.begin(), mCaps.compressedTextureFormats.end(),
                      params);
            break;
        case GL_RESET_NOTIFICATION_STRATEGY_EXT:
            *params = mResetStrategy;
            break;
        case GL_NUM_SHADER_BINARY_FORMATS:
            *params = static_cast<GLint>(mCaps.shaderBinaryFormats.size());
            break;
        case GL_SHADER_BINARY_FORMATS:
            std::copy(mCaps.shaderBinaryFormats.begin(), mCaps.shaderBinaryFormats.end(), params);
            break;
        case GL_NUM_PROGRAM_BINARY_FORMATS:
            *params = static_cast<GLint>(mCaps.programBinaryFormats.size());
            break;
        case GL_PROGRAM_BINARY_FORMATS:
            std::copy(mCaps.programBinaryFormats.begin(), mCaps.programBinaryFormats.end(), params);
            break;
        case GL_NUM_EXTENSIONS:
            *params = static_cast<GLint>(mExtensionStrings.size());
            break;

        // GL_KHR_debug
        case GL_MAX_DEBUG_MESSAGE_LENGTH:
            *params = mExtensions.maxDebugMessageLength;
            break;
        case GL_MAX_DEBUG_LOGGED_MESSAGES:
            *params = mExtensions.maxDebugLoggedMessages;
            break;
        case GL_MAX_DEBUG_GROUP_STACK_DEPTH:
            *params = mExtensions.maxDebugGroupStackDepth;
            break;
        case GL_MAX_LABEL_LENGTH:
            *params = mExtensions.maxLabelLength;
            break;

        // GL_ANGLE_multiview
        case GL_MAX_VIEWS_ANGLE:
            *params = mExtensions.maxViews;
            break;

        // GL_EXT_disjoint_timer_query
        case GL_GPU_DISJOINT_EXT:
            *params = mImplementation->getGPUDisjoint();
            break;
        case GL_MAX_FRAMEBUFFER_WIDTH:
            *params = mCaps.maxFramebufferWidth;
            break;
        case GL_MAX_FRAMEBUFFER_HEIGHT:
            *params = mCaps.maxFramebufferHeight;
            break;
        case GL_MAX_FRAMEBUFFER_SAMPLES:
            *params = mCaps.maxFramebufferSamples;
            break;
        case GL_MAX_SAMPLE_MASK_WORDS:
            *params = mCaps.maxSampleMaskWords;
            break;
        case GL_MAX_COLOR_TEXTURE_SAMPLES:
            *params = mCaps.maxColorTextureSamples;
            break;
        case GL_MAX_DEPTH_TEXTURE_SAMPLES:
            *params = mCaps.maxDepthTextureSamples;
            break;
        case GL_MAX_INTEGER_SAMPLES:
            *params = mCaps.maxIntegerSamples;
            break;
        case GL_MAX_VERTEX_ATTRIB_RELATIVE_OFFSET:
            *params = mCaps.maxVertexAttribRelativeOffset;
            break;
        case GL_MAX_VERTEX_ATTRIB_BINDINGS:
            *params = mCaps.maxVertexAttribBindings;
            break;
        case GL_MAX_VERTEX_ATTRIB_STRIDE:
            *params = mCaps.maxVertexAttribStride;
            break;
        case GL_MAX_VERTEX_ATOMIC_COUNTER_BUFFERS:
            *params = mCaps.maxVertexAtomicCounterBuffers;
            break;
        case GL_MAX_VERTEX_ATOMIC_COUNTERS:
            *params = mCaps.maxVertexAtomicCounters;
            break;
        case GL_MAX_VERTEX_IMAGE_UNIFORMS:
            *params = mCaps.maxVertexImageUniforms;
            break;
        case GL_MAX_VERTEX_SHADER_STORAGE_BLOCKS:
            *params = mCaps.maxVertexShaderStorageBlocks;
            break;
        case GL_MAX_FRAGMENT_ATOMIC_COUNTER_BUFFERS:
            *params = mCaps.maxFragmentAtomicCounterBuffers;
            break;
        case GL_MAX_FRAGMENT_ATOMIC_COUNTERS:
            *params = mCaps.maxFragmentAtomicCounters;
            break;
        case GL_MAX_FRAGMENT_IMAGE_UNIFORMS:
            *params = mCaps.maxFragmentImageUniforms;
            break;
        case GL_MAX_FRAGMENT_SHADER_STORAGE_BLOCKS:
            *params = mCaps.maxFragmentShaderStorageBlocks;
            break;
        case GL_MIN_PROGRAM_TEXTURE_GATHER_OFFSET:
            *params = mCaps.minProgramTextureGatherOffset;
            break;
        case GL_MAX_PROGRAM_TEXTURE_GATHER_OFFSET:
            *params = mCaps.maxProgramTextureGatherOffset;
            break;
        case GL_MAX_COMPUTE_WORK_GROUP_INVOCATIONS:
            *params = mCaps.maxComputeWorkGroupInvocations;
            break;
        case GL_MAX_COMPUTE_UNIFORM_BLOCKS:
            *params = mCaps.maxComputeUniformBlocks;
            break;
        case GL_MAX_COMPUTE_TEXTURE_IMAGE_UNITS:
            *params = mCaps.maxComputeTextureImageUnits;
            break;
        case GL_MAX_COMPUTE_SHARED_MEMORY_SIZE:
            *params = mCaps.maxComputeSharedMemorySize;
            break;
        case GL_MAX_COMPUTE_UNIFORM_COMPONENTS:
            *params = mCaps.maxComputeUniformComponents;
            break;
        case GL_MAX_COMPUTE_ATOMIC_COUNTER_BUFFERS:
            *params = mCaps.maxComputeAtomicCounterBuffers;
            break;
        case GL_MAX_COMPUTE_ATOMIC_COUNTERS:
            *params = mCaps.maxComputeAtomicCounters;
            break;
        case GL_MAX_COMPUTE_IMAGE_UNIFORMS:
            *params = mCaps.maxComputeImageUniforms;
            break;
        case GL_MAX_COMBINED_COMPUTE_UNIFORM_COMPONENTS:
            *params = mCaps.maxCombinedComputeUniformComponents;
            break;
        case GL_MAX_COMPUTE_SHADER_STORAGE_BLOCKS:
            *params = mCaps.maxComputeShaderStorageBlocks;
            break;
        case GL_MAX_COMBINED_SHADER_OUTPUT_RESOURCES:
            *params = mCaps.maxCombinedShaderOutputResources;
            break;
        case GL_MAX_UNIFORM_LOCATIONS:
            *params = mCaps.maxUniformLocations;
            break;
        case GL_MAX_ATOMIC_COUNTER_BUFFER_BINDINGS:
            *params = mCaps.maxAtomicCounterBufferBindings;
            break;
        case GL_MAX_ATOMIC_COUNTER_BUFFER_SIZE:
            *params = mCaps.maxAtomicCounterBufferSize;
            break;
        case GL_MAX_COMBINED_ATOMIC_COUNTER_BUFFERS:
            *params = mCaps.maxCombinedAtomicCounterBuffers;
            break;
        case GL_MAX_COMBINED_ATOMIC_COUNTERS:
            *params = mCaps.maxCombinedAtomicCounters;
            break;
        case GL_MAX_IMAGE_UNITS:
            *params = mCaps.maxImageUnits;
            break;
        case GL_MAX_COMBINED_IMAGE_UNIFORMS:
            *params = mCaps.maxCombinedImageUniforms;
            break;
        case GL_MAX_SHADER_STORAGE_BUFFER_BINDINGS:
            *params = mCaps.maxShaderStorageBufferBindings;
            break;
        case GL_MAX_COMBINED_SHADER_STORAGE_BLOCKS:
            *params = mCaps.maxCombinedShaderStorageBlocks;
            break;
        case GL_SHADER_STORAGE_BUFFER_OFFSET_ALIGNMENT:
            *params = mCaps.shaderStorageBufferOffsetAlignment;
            break;
        default:
            mGLState.getIntegerv(this, pname, params);
            break;
    }
}

void Context::getInteger64vImpl(GLenum pname, GLint64 *params)
{
    // Queries about context capabilities and maximums are answered by Context.
    // Queries about current GL state values are answered by State.
    switch (pname)
    {
        case GL_MAX_ELEMENT_INDEX:
            *params = mCaps.maxElementIndex;
            break;
        case GL_MAX_UNIFORM_BLOCK_SIZE:
            *params = mCaps.maxUniformBlockSize;
            break;
        case GL_MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS:
            *params = mCaps.maxCombinedVertexUniformComponents;
            break;
        case GL_MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS:
            *params = mCaps.maxCombinedFragmentUniformComponents;
            break;
        case GL_MAX_SERVER_WAIT_TIMEOUT:
            *params = mCaps.maxServerWaitTimeout;
            break;

        // GL_EXT_disjoint_timer_query
        case GL_TIMESTAMP_EXT:
            *params = mImplementation->getTimestamp();
            break;

        case GL_MAX_SHADER_STORAGE_BLOCK_SIZE:
            *params = mCaps.maxShaderStorageBlockSize;
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void Context::getPointerv(GLenum pname, void **params) const
{
    mGLState.getPointerv(pname, params);
}

void Context::getIntegeri_v(GLenum target, GLuint index, GLint *data)
{
    // Queries about context capabilities and maximums are answered by Context.
    // Queries about current GL state values are answered by State.

    GLenum nativeType;
    unsigned int numParams;
    bool queryStatus = getIndexedQueryParameterInfo(target, &nativeType, &numParams);
    ASSERT(queryStatus);

    if (nativeType == GL_INT)
    {
        switch (target)
        {
            case GL_MAX_COMPUTE_WORK_GROUP_COUNT:
                ASSERT(index < 3u);
                *data = mCaps.maxComputeWorkGroupCount[index];
                break;
            case GL_MAX_COMPUTE_WORK_GROUP_SIZE:
                ASSERT(index < 3u);
                *data = mCaps.maxComputeWorkGroupSize[index];
                break;
            default:
                mGLState.getIntegeri_v(target, index, data);
        }
    }
    else
    {
        CastIndexedStateValues(this, nativeType, target, index, numParams, data);
    }
}

void Context::getInteger64i_v(GLenum target, GLuint index, GLint64 *data)
{
    // Queries about context capabilities and maximums are answered by Context.
    // Queries about current GL state values are answered by State.

    GLenum nativeType;
    unsigned int numParams;
    bool queryStatus = getIndexedQueryParameterInfo(target, &nativeType, &numParams);
    ASSERT(queryStatus);

    if (nativeType == GL_INT_64_ANGLEX)
    {
        mGLState.getInteger64i_v(target, index, data);
    }
    else
    {
        CastIndexedStateValues(this, nativeType, target, index, numParams, data);
    }
}

void Context::getBooleani_v(GLenum target, GLuint index, GLboolean *data)
{
    // Queries about context capabilities and maximums are answered by Context.
    // Queries about current GL state values are answered by State.

    GLenum nativeType;
    unsigned int numParams;
    bool queryStatus = getIndexedQueryParameterInfo(target, &nativeType, &numParams);
    ASSERT(queryStatus);

    if (nativeType == GL_BOOL)
    {
        mGLState.getBooleani_v(target, index, data);
    }
    else
    {
        CastIndexedStateValues(this, nativeType, target, index, numParams, data);
    }
}

void Context::getBufferParameteriv(GLenum target, GLenum pname, GLint *params)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    QueryBufferParameteriv(buffer, pname, params);
}

void Context::getFramebufferAttachmentParameteriv(GLenum target,
                                                  GLenum attachment,
                                                  GLenum pname,
                                                  GLint *params)
{
    const Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    QueryFramebufferAttachmentParameteriv(framebuffer, attachment, pname, params);
}

void Context::getRenderbufferParameteriv(GLenum target, GLenum pname, GLint *params)
{
    Renderbuffer *renderbuffer = mGLState.getCurrentRenderbuffer();
    QueryRenderbufferiv(this, renderbuffer, pname, params);
}

void Context::getTexParameterfv(GLenum target, GLenum pname, GLfloat *params)
{
    Texture *texture = getTargetTexture(target);
    QueryTexParameterfv(texture, pname, params);
}

void Context::getTexParameteriv(GLenum target, GLenum pname, GLint *params)
{
    Texture *texture = getTargetTexture(target);
    QueryTexParameteriv(texture, pname, params);
}
void Context::texParameterf(GLenum target, GLenum pname, GLfloat param)
{
    Texture *texture = getTargetTexture(target);
    SetTexParameterf(this, texture, pname, param);
    onTextureChange(texture);
}

void Context::texParameterfv(GLenum target, GLenum pname, const GLfloat *params)
{
    Texture *texture = getTargetTexture(target);
    SetTexParameterfv(this, texture, pname, params);
    onTextureChange(texture);
}

void Context::texParameteri(GLenum target, GLenum pname, GLint param)
{
    Texture *texture = getTargetTexture(target);
    SetTexParameteri(this, texture, pname, param);
    onTextureChange(texture);
}

void Context::texParameteriv(GLenum target, GLenum pname, const GLint *params)
{
    Texture *texture = getTargetTexture(target);
    SetTexParameteriv(this, texture, pname, params);
    onTextureChange(texture);
}

void Context::drawArrays(GLenum mode, GLint first, GLsizei count)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(mImplementation->drawArrays(this, mode, first, count));
    MarkTransformFeedbackBufferUsage(mGLState.getCurrentTransformFeedback());
}

void Context::drawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei instanceCount)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(
        mImplementation->drawArraysInstanced(this, mode, first, count, instanceCount));
    MarkTransformFeedbackBufferUsage(mGLState.getCurrentTransformFeedback());
}

void Context::drawElements(GLenum mode, GLsizei count, GLenum type, const void *indices)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(mImplementation->drawElements(this, mode, count, type, indices));
}

void Context::drawElementsInstanced(GLenum mode,
                                    GLsizei count,
                                    GLenum type,
                                    const void *indices,
                                    GLsizei instances)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(
        mImplementation->drawElementsInstanced(this, mode, count, type, indices, instances));
}

void Context::drawRangeElements(GLenum mode,
                                GLuint start,
                                GLuint end,
                                GLsizei count,
                                GLenum type,
                                const void *indices)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(
        mImplementation->drawRangeElements(this, mode, start, end, count, type, indices));
}

void Context::drawArraysIndirect(GLenum mode, const void *indirect)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(mImplementation->drawArraysIndirect(this, mode, indirect));
}

void Context::drawElementsIndirect(GLenum mode, GLenum type, const void *indirect)
{
    ANGLE_CONTEXT_TRY(prepareForDraw());
    ANGLE_CONTEXT_TRY(mImplementation->drawElementsIndirect(this, mode, type, indirect));
}

void Context::flush()
{
    handleError(mImplementation->flush());
}

void Context::finish()
{
    handleError(mImplementation->finish());
}

void Context::insertEventMarker(GLsizei length, const char *marker)
{
    ASSERT(mImplementation);
    mImplementation->insertEventMarker(length, marker);
}

void Context::pushGroupMarker(GLsizei length, const char *marker)
{
    ASSERT(mImplementation);
    mImplementation->pushGroupMarker(length, marker);
}

void Context::popGroupMarker()
{
    ASSERT(mImplementation);
    mImplementation->popGroupMarker();
}

void Context::bindUniformLocation(GLuint program, GLint location, const GLchar *name)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);

    programObject->bindUniformLocation(location, name);
}

void Context::setCoverageModulation(GLenum components)
{
    mGLState.setCoverageModulation(components);
}

void Context::loadPathRenderingMatrix(GLenum matrixMode, const GLfloat *matrix)
{
    mGLState.loadPathRenderingMatrix(matrixMode, matrix);
}

void Context::loadPathRenderingIdentityMatrix(GLenum matrixMode)
{
    GLfloat I[16];
    angle::Matrix<GLfloat>::setToIdentity(I);

    mGLState.loadPathRenderingMatrix(matrixMode, I);
}

void Context::stencilFillPath(GLuint path, GLenum fillMode, GLuint mask)
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (!pathObj)
        return;

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilFillPath(pathObj, fillMode, mask);
}

void Context::stencilStrokePath(GLuint path, GLint reference, GLuint mask)
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (!pathObj)
        return;

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilStrokePath(pathObj, reference, mask);
}

void Context::coverFillPath(GLuint path, GLenum coverMode)
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (!pathObj)
        return;

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->coverFillPath(pathObj, coverMode);
}

void Context::coverStrokePath(GLuint path, GLenum coverMode)
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (!pathObj)
        return;

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->coverStrokePath(pathObj, coverMode);
}

void Context::stencilThenCoverFillPath(GLuint path, GLenum fillMode, GLuint mask, GLenum coverMode)
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (!pathObj)
        return;

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilThenCoverFillPath(pathObj, fillMode, mask, coverMode);
}

void Context::stencilThenCoverStrokePath(GLuint path,
                                         GLint reference,
                                         GLuint mask,
                                         GLenum coverMode)
{
    const auto *pathObj = mState.mPaths->getPath(path);
    if (!pathObj)
        return;

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilThenCoverStrokePath(pathObj, reference, mask, coverMode);
}

void Context::coverFillPathInstanced(GLsizei numPaths,
                                     GLenum pathNameType,
                                     const void *paths,
                                     GLuint pathBase,
                                     GLenum coverMode,
                                     GLenum transformType,
                                     const GLfloat *transformValues)
{
    const auto &pathObjects = GatherPaths(*mState.mPaths, numPaths, pathNameType, paths, pathBase);

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->coverFillPathInstanced(pathObjects, coverMode, transformType, transformValues);
}

void Context::coverStrokePathInstanced(GLsizei numPaths,
                                       GLenum pathNameType,
                                       const void *paths,
                                       GLuint pathBase,
                                       GLenum coverMode,
                                       GLenum transformType,
                                       const GLfloat *transformValues)
{
    const auto &pathObjects = GatherPaths(*mState.mPaths, numPaths, pathNameType, paths, pathBase);

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->coverStrokePathInstanced(pathObjects, coverMode, transformType,
                                              transformValues);
}

void Context::stencilFillPathInstanced(GLsizei numPaths,
                                       GLenum pathNameType,
                                       const void *paths,
                                       GLuint pathBase,
                                       GLenum fillMode,
                                       GLuint mask,
                                       GLenum transformType,
                                       const GLfloat *transformValues)
{
    const auto &pathObjects = GatherPaths(*mState.mPaths, numPaths, pathNameType, paths, pathBase);

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilFillPathInstanced(pathObjects, fillMode, mask, transformType,
                                              transformValues);
}

void Context::stencilStrokePathInstanced(GLsizei numPaths,
                                         GLenum pathNameType,
                                         const void *paths,
                                         GLuint pathBase,
                                         GLint reference,
                                         GLuint mask,
                                         GLenum transformType,
                                         const GLfloat *transformValues)
{
    const auto &pathObjects = GatherPaths(*mState.mPaths, numPaths, pathNameType, paths, pathBase);

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilStrokePathInstanced(pathObjects, reference, mask, transformType,
                                                transformValues);
}

void Context::stencilThenCoverFillPathInstanced(GLsizei numPaths,
                                                GLenum pathNameType,
                                                const void *paths,
                                                GLuint pathBase,
                                                GLenum fillMode,
                                                GLuint mask,
                                                GLenum coverMode,
                                                GLenum transformType,
                                                const GLfloat *transformValues)
{
    const auto &pathObjects = GatherPaths(*mState.mPaths, numPaths, pathNameType, paths, pathBase);

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilThenCoverFillPathInstanced(pathObjects, coverMode, fillMode, mask,
                                                       transformType, transformValues);
}

void Context::stencilThenCoverStrokePathInstanced(GLsizei numPaths,
                                                  GLenum pathNameType,
                                                  const void *paths,
                                                  GLuint pathBase,
                                                  GLint reference,
                                                  GLuint mask,
                                                  GLenum coverMode,
                                                  GLenum transformType,
                                                  const GLfloat *transformValues)
{
    const auto &pathObjects = GatherPaths(*mState.mPaths, numPaths, pathNameType, paths, pathBase);

    // TODO(svaisanen@nvidia.com): maybe sync only state required for path rendering?
    syncRendererState();

    mImplementation->stencilThenCoverStrokePathInstanced(pathObjects, coverMode, reference, mask,
                                                         transformType, transformValues);
}

void Context::bindFragmentInputLocation(GLuint program, GLint location, const GLchar *name)
{
    auto *programObject = getProgram(program);

    programObject->bindFragmentInputLocation(location, name);
}

void Context::programPathFragmentInputGen(GLuint program,
                                          GLint location,
                                          GLenum genMode,
                                          GLint components,
                                          const GLfloat *coeffs)
{
    auto *programObject = getProgram(program);

    programObject->pathFragmentInputGen(this, location, genMode, components, coeffs);
}

GLuint Context::getProgramResourceIndex(GLuint program, GLenum programInterface, const GLchar *name)
{
    const auto *programObject = getProgram(program);
    return QueryProgramResourceIndex(programObject, programInterface, name);
}

void Context::getProgramResourceName(GLuint program,
                                     GLenum programInterface,
                                     GLuint index,
                                     GLsizei bufSize,
                                     GLsizei *length,
                                     GLchar *name)
{
    const auto *programObject = getProgram(program);
    QueryProgramResourceName(programObject, programInterface, index, bufSize, length, name);
}

GLint Context::getProgramResourceLocation(GLuint program,
                                          GLenum programInterface,
                                          const GLchar *name)
{
    const auto *programObject = getProgram(program);
    return QueryProgramResourceLocation(programObject, programInterface, name);
}

void Context::getProgramResourceiv(GLuint program,
                                   GLenum programInterface,
                                   GLuint index,
                                   GLsizei propCount,
                                   const GLenum *props,
                                   GLsizei bufSize,
                                   GLsizei *length,
                                   GLint *params)
{
    const auto *programObject = getProgram(program);
    QueryProgramResourceiv(programObject, programInterface, index, propCount, props, bufSize,
                           length, params);
}

void Context::getProgramInterfaceiv(GLuint program,
                                    GLenum programInterface,
                                    GLenum pname,
                                    GLint *params)
{
    const auto *programObject = getProgram(program);
    QueryProgramInterfaceiv(programObject, programInterface, pname, params);
}

void Context::handleError(const Error &error)
{
    if (error.isError())
    {
        GLenum code = error.getCode();
        mErrors.insert(code);
        if (code == GL_OUT_OF_MEMORY && getWorkarounds().loseContextOnOutOfMemory)
        {
            markContextLost();
        }

        if (!error.getMessage().empty())
        {
            auto *debug = &mGLState.getDebug();
            debug->insertMessage(GL_DEBUG_SOURCE_API, GL_DEBUG_TYPE_ERROR, error.getID(),
                                 GL_DEBUG_SEVERITY_HIGH, error.getMessage());
        }
    }
}

// Get one of the recorded errors and clear its flag, if any.
// [OpenGL ES 2.0.24] section 2.5 page 13.
GLenum Context::getError()
{
    if (mErrors.empty())
    {
        return GL_NO_ERROR;
    }
    else
    {
        GLenum error = *mErrors.begin();
        mErrors.erase(mErrors.begin());
        return error;
    }
}

// NOTE: this function should not assume that this context is current!
void Context::markContextLost()
{
    if (mResetStrategy == GL_LOSE_CONTEXT_ON_RESET_EXT)
    {
        mResetStatus       = GL_UNKNOWN_CONTEXT_RESET_EXT;
        mContextLostForced = true;
    }
    mContextLost = true;
}

bool Context::isContextLost()
{
    return mContextLost;
}

GLenum Context::getResetStatus()
{
    // Even if the application doesn't want to know about resets, we want to know
    // as it will allow us to skip all the calls.
    if (mResetStrategy == GL_NO_RESET_NOTIFICATION_EXT)
    {
        if (!mContextLost && mImplementation->getResetStatus() != GL_NO_ERROR)
        {
            mContextLost = true;
        }

        // EXT_robustness, section 2.6: If the reset notification behavior is
        // NO_RESET_NOTIFICATION_EXT, then the implementation will never deliver notification of
        // reset events, and GetGraphicsResetStatusEXT will always return NO_ERROR.
        return GL_NO_ERROR;
    }

    // The GL_EXT_robustness spec says that if a reset is encountered, a reset
    // status should be returned at least once, and GL_NO_ERROR should be returned
    // once the device has finished resetting.
    if (!mContextLost)
    {
        ASSERT(mResetStatus == GL_NO_ERROR);
        mResetStatus = mImplementation->getResetStatus();

        if (mResetStatus != GL_NO_ERROR)
        {
            mContextLost = true;
        }
    }
    else if (!mContextLostForced && mResetStatus != GL_NO_ERROR)
    {
        // If markContextLost was used to mark the context lost then
        // assume that is not recoverable, and continue to report the
        // lost reset status for the lifetime of this context.
        mResetStatus = mImplementation->getResetStatus();
    }

    return mResetStatus;
}

bool Context::isResetNotificationEnabled()
{
    return (mResetStrategy == GL_LOSE_CONTEXT_ON_RESET_EXT);
}

const egl::Config *Context::getConfig() const
{
    return mConfig;
}

EGLenum Context::getClientType() const
{
    return mClientType;
}

EGLenum Context::getRenderBuffer() const
{
    const Framebuffer *framebuffer = mState.mFramebuffers->getFramebuffer(0);
    if (framebuffer == nullptr)
    {
        return EGL_NONE;
    }

    const FramebufferAttachment *backAttachment = framebuffer->getAttachment(GL_BACK);
    ASSERT(backAttachment != nullptr);
    return backAttachment->getSurface()->getRenderBuffer();
}

VertexArray *Context::checkVertexArrayAllocation(GLuint vertexArrayHandle)
{
    // Only called after a prior call to Gen.
    VertexArray *vertexArray = getVertexArray(vertexArrayHandle);
    if (!vertexArray)
    {
        vertexArray = new VertexArray(mImplementation.get(), vertexArrayHandle,
                                      mCaps.maxVertexAttributes, mCaps.maxVertexAttribBindings);

        mVertexArrayMap.assign(vertexArrayHandle, vertexArray);
    }

    return vertexArray;
}

TransformFeedback *Context::checkTransformFeedbackAllocation(GLuint transformFeedbackHandle)
{
    // Only called after a prior call to Gen.
    TransformFeedback *transformFeedback = getTransformFeedback(transformFeedbackHandle);
    if (!transformFeedback)
    {
        transformFeedback =
            new TransformFeedback(mImplementation.get(), transformFeedbackHandle, mCaps);
        transformFeedback->addRef();
        mTransformFeedbackMap.assign(transformFeedbackHandle, transformFeedback);
    }

    return transformFeedback;
}

bool Context::isVertexArrayGenerated(GLuint vertexArray)
{
    ASSERT(mVertexArrayMap.contains(0));
    return mVertexArrayMap.contains(vertexArray);
}

bool Context::isTransformFeedbackGenerated(GLuint transformFeedback)
{
    ASSERT(mTransformFeedbackMap.contains(0));
    return mTransformFeedbackMap.contains(transformFeedback);
}

void Context::detachTexture(GLuint texture)
{
    // Simple pass-through to State's detachTexture method, as textures do not require
    // allocation map management either here or in the resource manager at detach time.
    // Zero textures are held by the Context, and we don't attempt to request them from
    // the State.
    mGLState.detachTexture(this, mZeroTextures, texture);
}

void Context::detachBuffer(GLuint buffer)
{
    // Simple pass-through to State's detachBuffer method, since
    // only buffer attachments to container objects that are bound to the current context
    // should be detached. And all those are available in State.

    // [OpenGL ES 3.2] section 5.1.2 page 45:
    // Attachments to unbound container objects, such as
    // deletion of a buffer attached to a vertex array object which is not bound to the context,
    // are not affected and continue to act as references on the deleted object
    mGLState.detachBuffer(this, buffer);
}

void Context::detachFramebuffer(GLuint framebuffer)
{
    // Framebuffer detachment is handled by Context, because 0 is a valid
    // Framebuffer object, and a pointer to it must be passed from Context
    // to State at binding time.

    // [OpenGL ES 2.0.24] section 4.4 page 107:
    // If a framebuffer that is currently bound to the target FRAMEBUFFER is deleted, it is as
    // though BindFramebuffer had been executed with the target of FRAMEBUFFER and framebuffer of
    // zero.

    if (mGLState.removeReadFramebufferBinding(framebuffer) && framebuffer != 0)
    {
        bindReadFramebuffer(0);
    }

    if (mGLState.removeDrawFramebufferBinding(framebuffer) && framebuffer != 0)
    {
        bindDrawFramebuffer(0);
    }
}

void Context::detachRenderbuffer(GLuint renderbuffer)
{
    mGLState.detachRenderbuffer(this, renderbuffer);
}

void Context::detachVertexArray(GLuint vertexArray)
{
    // Vertex array detachment is handled by Context, because 0 is a valid
    // VAO, and a pointer to it must be passed from Context to State at
    // binding time.

    // [OpenGL ES 3.0.2] section 2.10 page 43:
    // If a vertex array object that is currently bound is deleted, the binding
    // for that object reverts to zero and the default vertex array becomes current.
    if (mGLState.removeVertexArrayBinding(vertexArray))
    {
        bindVertexArray(0);
    }
}

void Context::detachTransformFeedback(GLuint transformFeedback)
{
    // Transform feedback detachment is handled by Context, because 0 is a valid
    // transform feedback, and a pointer to it must be passed from Context to State at
    // binding time.

    // The OpenGL specification doesn't mention what should happen when the currently bound
    // transform feedback object is deleted. Since it is a container object, we treat it like
    // VAOs and FBOs and set the current bound transform feedback back to 0.
    if (mGLState.removeTransformFeedbackBinding(this, transformFeedback))
    {
        bindTransformFeedback(GL_TRANSFORM_FEEDBACK, 0);
    }
}

void Context::detachSampler(GLuint sampler)
{
    mGLState.detachSampler(this, sampler);
}

void Context::detachProgramPipeline(GLuint pipeline)
{
    mGLState.detachProgramPipeline(this, pipeline);
}

void Context::vertexAttribDivisor(GLuint index, GLuint divisor)
{
    mGLState.setVertexAttribDivisor(this, index, divisor);
}

void Context::samplerParameteri(GLuint sampler, GLenum pname, GLint param)
{
    Sampler *samplerObject =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), sampler);
    SetSamplerParameteri(samplerObject, pname, param);
    mGLState.setObjectDirty(GL_SAMPLER);
}

void Context::samplerParameteriv(GLuint sampler, GLenum pname, const GLint *param)
{
    Sampler *samplerObject =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), sampler);
    SetSamplerParameteriv(samplerObject, pname, param);
    mGLState.setObjectDirty(GL_SAMPLER);
}

void Context::samplerParameterf(GLuint sampler, GLenum pname, GLfloat param)
{
    Sampler *samplerObject =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), sampler);
    SetSamplerParameterf(samplerObject, pname, param);
    mGLState.setObjectDirty(GL_SAMPLER);
}

void Context::samplerParameterfv(GLuint sampler, GLenum pname, const GLfloat *param)
{
    Sampler *samplerObject =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), sampler);
    SetSamplerParameterfv(samplerObject, pname, param);
    mGLState.setObjectDirty(GL_SAMPLER);
}

void Context::getSamplerParameteriv(GLuint sampler, GLenum pname, GLint *params)
{
    const Sampler *samplerObject =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), sampler);
    QuerySamplerParameteriv(samplerObject, pname, params);
    mGLState.setObjectDirty(GL_SAMPLER);
}

void Context::getSamplerParameterfv(GLuint sampler, GLenum pname, GLfloat *params)
{
    const Sampler *samplerObject =
        mState.mSamplers->checkSamplerAllocation(mImplementation.get(), sampler);
    QuerySamplerParameterfv(samplerObject, pname, params);
    mGLState.setObjectDirty(GL_SAMPLER);
}

void Context::programParameteri(GLuint program, GLenum pname, GLint value)
{
    gl::Program *programObject = getProgram(program);
    SetProgramParameteri(programObject, pname, value);
}

void Context::initRendererString()
{
    std::ostringstream rendererString;
    rendererString << "ANGLE (";
    rendererString << mImplementation->getRendererDescription();
    rendererString << ")";

    mRendererString = MakeStaticString(rendererString.str());
}

void Context::initVersionStrings()
{
    const Version &clientVersion = getClientVersion();

    std::ostringstream versionString;
    versionString << "OpenGL ES " << clientVersion.major << "." << clientVersion.minor << " (ANGLE "
                  << ANGLE_VERSION_STRING << ")";
    mVersionString = MakeStaticString(versionString.str());

    std::ostringstream shadingLanguageVersionString;
    shadingLanguageVersionString << "OpenGL ES GLSL ES "
                                 << (clientVersion.major == 2 ? 1 : clientVersion.major) << "."
                                 << clientVersion.minor << "0 (ANGLE " << ANGLE_VERSION_STRING
                                 << ")";
    mShadingLanguageString = MakeStaticString(shadingLanguageVersionString.str());
}

void Context::initExtensionStrings()
{
    auto mergeExtensionStrings = [](const std::vector<const char *> &strings) {
        std::ostringstream combinedStringStream;
        std::copy(strings.begin(), strings.end(),
                  std::ostream_iterator<const char *>(combinedStringStream, " "));
        return MakeStaticString(combinedStringStream.str());
    };

    mExtensionStrings.clear();
    for (const auto &extensionString : mExtensions.getStrings())
    {
        mExtensionStrings.push_back(MakeStaticString(extensionString));
    }
    mExtensionString = mergeExtensionStrings(mExtensionStrings);

    const gl::Extensions &nativeExtensions = mImplementation->getNativeExtensions();

    mRequestableExtensionStrings.clear();
    for (const auto &extensionInfo : GetExtensionInfoMap())
    {
        if (extensionInfo.second.Requestable &&
            !(mExtensions.*(extensionInfo.second.ExtensionsMember)) &&
            nativeExtensions.*(extensionInfo.second.ExtensionsMember))
        {
            mRequestableExtensionStrings.push_back(MakeStaticString(extensionInfo.first));
        }
    }
    mRequestableExtensionString = mergeExtensionStrings(mRequestableExtensionStrings);
}

const GLubyte *Context::getString(GLenum name) const
{
    switch (name)
    {
        case GL_VENDOR:
            return reinterpret_cast<const GLubyte *>("Google Inc.");

        case GL_RENDERER:
            return reinterpret_cast<const GLubyte *>(mRendererString);

        case GL_VERSION:
            return reinterpret_cast<const GLubyte *>(mVersionString);

        case GL_SHADING_LANGUAGE_VERSION:
            return reinterpret_cast<const GLubyte *>(mShadingLanguageString);

        case GL_EXTENSIONS:
            return reinterpret_cast<const GLubyte *>(mExtensionString);

        case GL_REQUESTABLE_EXTENSIONS_ANGLE:
            return reinterpret_cast<const GLubyte *>(mRequestableExtensionString);

        default:
            UNREACHABLE();
            return nullptr;
    }
}

const GLubyte *Context::getStringi(GLenum name, GLuint index) const
{
    switch (name)
    {
        case GL_EXTENSIONS:
            return reinterpret_cast<const GLubyte *>(mExtensionStrings[index]);

        case GL_REQUESTABLE_EXTENSIONS_ANGLE:
            return reinterpret_cast<const GLubyte *>(mRequestableExtensionStrings[index]);

        default:
            UNREACHABLE();
            return nullptr;
    }
}

size_t Context::getExtensionStringCount() const
{
    return mExtensionStrings.size();
}

bool Context::isExtensionRequestable(const char *name)
{
    const ExtensionInfoMap &extensionInfos = GetExtensionInfoMap();
    auto extension                         = extensionInfos.find(name);

    const Extensions &nativeExtensions = mImplementation->getNativeExtensions();
    return extension != extensionInfos.end() && extension->second.Requestable &&
           nativeExtensions.*(extension->second.ExtensionsMember);
}

void Context::requestExtension(const char *name)
{
    const ExtensionInfoMap &extensionInfos = GetExtensionInfoMap();
    ASSERT(extensionInfos.find(name) != extensionInfos.end());
    const auto &extension = extensionInfos.at(name);
    ASSERT(extension.Requestable);
    ASSERT(mImplementation->getNativeExtensions().*(extension.ExtensionsMember));

    if (mExtensions.*(extension.ExtensionsMember))
    {
        // Extension already enabled
        return;
    }

    mExtensions.*(extension.ExtensionsMember) = true;
    updateCaps();
    initExtensionStrings();

    // Release the shader compiler so it will be re-created with the requested extensions enabled.
    releaseShaderCompiler();

    // Invalidate all textures and framebuffer. Some extensions make new formats renderable or
    // sampleable.
    mState.mTextures->signalAllTexturesDirty();
    for (auto &zeroTexture : mZeroTextures)
    {
        zeroTexture.second->signalDirty(InitState::Initialized);
    }

    mState.mFramebuffers->invalidateFramebufferComplenessCache();
}

size_t Context::getRequestableExtensionStringCount() const
{
    return mRequestableExtensionStrings.size();
}

void Context::beginTransformFeedback(GLenum primitiveMode)
{
    TransformFeedback *transformFeedback = mGLState.getCurrentTransformFeedback();
    ASSERT(transformFeedback != nullptr);
    ASSERT(!transformFeedback->isPaused());

    transformFeedback->begin(this, primitiveMode, mGLState.getProgram());
}

bool Context::hasActiveTransformFeedback(GLuint program) const
{
    for (auto pair : mTransformFeedbackMap)
    {
        if (pair.second != nullptr && pair.second->hasBoundProgram(program))
        {
            return true;
        }
    }
    return false;
}

void Context::initCaps(const egl::DisplayExtensions &displayExtensions, bool robustResourceInit)
{
    mCaps = mImplementation->getNativeCaps();

    mExtensions = mImplementation->getNativeExtensions();

    mLimitations = mImplementation->getNativeLimitations();

    if (getClientVersion() < Version(3, 0))
    {
        // Disable ES3+ extensions
        mExtensions.colorBufferFloat      = false;
        mExtensions.eglImageExternalEssl3 = false;
        mExtensions.textureNorm16         = false;
        mExtensions.multiview             = false;
        mExtensions.maxViews              = 1u;
    }

    if (getClientVersion() > Version(2, 0))
    {
        // FIXME(geofflang): Don't support EXT_sRGB in non-ES2 contexts
        // mExtensions.sRGB = false;
    }

    // Some extensions are always available because they are implemented in the GL layer.
    mExtensions.bindUniformLocation   = true;
    mExtensions.vertexArrayObject     = true;
    mExtensions.bindGeneratesResource = true;
    mExtensions.clientArrays          = true;
    mExtensions.requestExtension      = true;

    // Enable the no error extension if the context was created with the flag.
    mExtensions.noError = mSkipValidation;

    // Enable surfaceless to advertise we'll have the correct behavior when there is no default FBO
    mExtensions.surfacelessContext = displayExtensions.surfacelessContext;

    // Explicitly enable GL_KHR_debug
    mExtensions.debug                   = true;
    mExtensions.maxDebugMessageLength   = 1024;
    mExtensions.maxDebugLoggedMessages  = 1024;
    mExtensions.maxDebugGroupStackDepth = 1024;
    mExtensions.maxLabelLength          = 1024;

    // Explicitly enable GL_ANGLE_robust_client_memory
    mExtensions.robustClientMemory = true;

    // Determine robust resource init availability from EGL.
    mExtensions.robustResourceInitialization = robustResourceInit;

    // mExtensions.robustBufferAccessBehavior is true only if robust access is true and the backend
    // supports it.
    mExtensions.robustBufferAccessBehavior =
        mRobustAccess && mExtensions.robustBufferAccessBehavior;

    // Enable the cache control query unconditionally.
    mExtensions.programCacheControl = true;

    // Apply implementation limits
    LimitCap(&mCaps.maxVertexAttributes, MAX_VERTEX_ATTRIBS);

    if (getClientVersion() < ES_3_1)
    {
        mCaps.maxVertexAttribBindings = mCaps.maxVertexAttributes;
    }
    else
    {
        LimitCap(&mCaps.maxVertexAttribBindings, MAX_VERTEX_ATTRIB_BINDINGS);
    }

    LimitCap(&mCaps.maxVertexUniformBlocks, IMPLEMENTATION_MAX_VERTEX_SHADER_UNIFORM_BUFFERS);
    LimitCap(&mCaps.maxVertexOutputComponents, IMPLEMENTATION_MAX_VARYING_VECTORS * 4);
    LimitCap(&mCaps.maxFragmentInputComponents, IMPLEMENTATION_MAX_VARYING_VECTORS * 4);

    // Limit textures as well, so we can use fast bitsets with texture bindings.
    LimitCap(&mCaps.maxCombinedTextureImageUnits, IMPLEMENTATION_MAX_ACTIVE_TEXTURES);
    LimitCap(&mCaps.maxVertexTextureImageUnits, IMPLEMENTATION_MAX_ACTIVE_TEXTURES / 2);
    LimitCap(&mCaps.maxTextureImageUnits, IMPLEMENTATION_MAX_ACTIVE_TEXTURES / 2);

    mCaps.maxSampleMaskWords = std::min<GLuint>(mCaps.maxSampleMaskWords, MAX_SAMPLE_MASK_WORDS);

    // WebGL compatibility
    mExtensions.webglCompatibility = mWebGLContext;
    for (const auto &extensionInfo : GetExtensionInfoMap())
    {
        // If this context is for WebGL, disable all enableable extensions
        if (mWebGLContext && extensionInfo.second.Requestable)
        {
            mExtensions.*(extensionInfo.second.ExtensionsMember) = false;
        }
    }

    // Generate texture caps
    updateCaps();
}

void Context::updateCaps()
{
    mCaps.compressedTextureFormats.clear();
    mTextureCaps.clear();

    for (auto capsIt : mImplementation->getNativeTextureCaps())
    {
        GLenum sizedInternalFormat = capsIt.first;
        TextureCaps formatCaps     = capsIt.second;

        const InternalFormat &formatInfo = GetSizedInternalFormatInfo(sizedInternalFormat);

        // Update the format caps based on the client version and extensions.
        // Caps are AND'd with the renderer caps because some core formats are still unsupported in
        // ES3.
        formatCaps.texturable =
            formatCaps.texturable && formatInfo.textureSupport(getClientVersion(), mExtensions);
        formatCaps.renderable =
            formatCaps.renderable && formatInfo.renderSupport(getClientVersion(), mExtensions);
        formatCaps.filterable =
            formatCaps.filterable && formatInfo.filterSupport(getClientVersion(), mExtensions);

        // OpenGL ES does not support multisampling with non-rendererable formats
        // OpenGL ES 3.0 or prior does not support multisampling with integer formats
        if (!formatCaps.renderable ||
            (getClientVersion() < ES_3_1 &&
             (formatInfo.componentType == GL_INT || formatInfo.componentType == GL_UNSIGNED_INT)))
        {
            formatCaps.sampleCounts.clear();
        }
        else
        {
            // We may have limited the max samples for some required renderbuffer formats due to
            // non-conformant formats. In this case MAX_SAMPLES needs to be lowered accordingly.
            GLuint formatMaxSamples = formatCaps.getMaxSamples();

            // GLES 3.0.5 section 4.4.2.2: "Implementations must support creation of renderbuffers
            // in these required formats with up to the value of MAX_SAMPLES multisamples, with the
            // exception of signed and unsigned integer formats."
            if (formatInfo.componentType != GL_INT && formatInfo.componentType != GL_UNSIGNED_INT &&
                formatInfo.isRequiredRenderbufferFormat(getClientVersion()))
            {
                ASSERT(getClientVersion() < ES_3_0 || formatMaxSamples >= 4);
                mCaps.maxSamples = std::min(mCaps.maxSamples, formatMaxSamples);
            }

            // Handle GLES 3.1 MAX_*_SAMPLES values similarly to MAX_SAMPLES.
            if (getClientVersion() >= ES_3_1)
            {
                // GLES 3.1 section 9.2.5: "Implementations must support creation of renderbuffers
                // in these required formats with up to the value of MAX_SAMPLES multisamples, with
                // the exception that the signed and unsigned integer formats are required only to
                // support creation of renderbuffers with up to the value of MAX_INTEGER_SAMPLES
                // multisamples, which must be at least one."
                if (formatInfo.componentType == GL_INT ||
                    formatInfo.componentType == GL_UNSIGNED_INT)
                {
                    mCaps.maxIntegerSamples = std::min(mCaps.maxIntegerSamples, formatMaxSamples);
                }

                // GLES 3.1 section 19.3.1.
                if (formatCaps.texturable)
                {
                    if (formatInfo.depthBits > 0)
                    {
                        mCaps.maxDepthTextureSamples =
                            std::min(mCaps.maxDepthTextureSamples, formatMaxSamples);
                    }
                    else if (formatInfo.redBits > 0)
                    {
                        mCaps.maxColorTextureSamples =
                            std::min(mCaps.maxColorTextureSamples, formatMaxSamples);
                    }
                }
            }
        }

        if (formatCaps.texturable && formatInfo.compressed)
        {
            mCaps.compressedTextureFormats.push_back(sizedInternalFormat);
        }

        mTextureCaps.insert(sizedInternalFormat, formatCaps);
    }

    // If program binary is disabled, blank out the memory cache pointer.
    if (!mImplementation->getNativeExtensions().getProgramBinary)
    {
        mMemoryProgramCache = nullptr;
    }
}

void Context::initWorkarounds()
{
    // Apply back-end workarounds.
    mImplementation->applyNativeWorkarounds(&mWorkarounds);

    // Lose the context upon out of memory error if the application is
    // expecting to watch for those events.
    mWorkarounds.loseContextOnOutOfMemory = (mResetStrategy == GL_LOSE_CONTEXT_ON_RESET_EXT);
}

Error Context::prepareForDraw()
{
    syncRendererState();
    ANGLE_TRY(mGLState.clearUnclearedActiveTextures(this));
    ANGLE_TRY(mGLState.getDrawFramebuffer()->ensureDrawAttachmentsInitialized(this));
    return NoError();
}

void Context::syncRendererState()
{
    mGLState.syncDirtyObjects(this);
    const State::DirtyBits &dirtyBits = mGLState.getDirtyBits();
    mImplementation->syncState(this, dirtyBits);
    mGLState.clearDirtyBits();
}

void Context::syncRendererState(const State::DirtyBits &bitMask,
                                const State::DirtyObjects &objectMask)
{
    mGLState.syncDirtyObjects(this, objectMask);
    const State::DirtyBits &dirtyBits = (mGLState.getDirtyBits() & bitMask);
    mImplementation->syncState(this, dirtyBits);
    mGLState.clearDirtyBits(dirtyBits);
}

void Context::blitFramebuffer(GLint srcX0,
                              GLint srcY0,
                              GLint srcX1,
                              GLint srcY1,
                              GLint dstX0,
                              GLint dstY0,
                              GLint dstX1,
                              GLint dstY1,
                              GLbitfield mask,
                              GLenum filter)
{
    Framebuffer *drawFramebuffer = mGLState.getDrawFramebuffer();
    ASSERT(drawFramebuffer);

    Rectangle srcArea(srcX0, srcY0, srcX1 - srcX0, srcY1 - srcY0);
    Rectangle dstArea(dstX0, dstY0, dstX1 - dstX0, dstY1 - dstY0);

    syncStateForBlit();

    handleError(drawFramebuffer->blit(this, srcArea, dstArea, mask, filter));
}

void Context::clear(GLbitfield mask)
{
    syncStateForClear();
    handleError(mGLState.getDrawFramebuffer()->clear(this, mask));
}

void Context::clearBufferfv(GLenum buffer, GLint drawbuffer, const GLfloat *values)
{
    syncStateForClear();
    handleError(mGLState.getDrawFramebuffer()->clearBufferfv(this, buffer, drawbuffer, values));
}

void Context::clearBufferuiv(GLenum buffer, GLint drawbuffer, const GLuint *values)
{
    syncStateForClear();
    handleError(mGLState.getDrawFramebuffer()->clearBufferuiv(this, buffer, drawbuffer, values));
}

void Context::clearBufferiv(GLenum buffer, GLint drawbuffer, const GLint *values)
{
    syncStateForClear();
    handleError(mGLState.getDrawFramebuffer()->clearBufferiv(this, buffer, drawbuffer, values));
}

void Context::clearBufferfi(GLenum buffer, GLint drawbuffer, GLfloat depth, GLint stencil)
{
    Framebuffer *framebufferObject = mGLState.getDrawFramebuffer();
    ASSERT(framebufferObject);

    // If a buffer is not present, the clear has no effect
    if (framebufferObject->getDepthbuffer() == nullptr &&
        framebufferObject->getStencilbuffer() == nullptr)
    {
        return;
    }

    syncStateForClear();
    handleError(framebufferObject->clearBufferfi(this, buffer, drawbuffer, depth, stencil));
}

void Context::readPixels(GLint x,
                         GLint y,
                         GLsizei width,
                         GLsizei height,
                         GLenum format,
                         GLenum type,
                         void *pixels)
{
    if (width == 0 || height == 0)
    {
        return;
    }

    syncStateForReadPixels();

    Framebuffer *readFBO = mGLState.getReadFramebuffer();
    ASSERT(readFBO);

    Rectangle area(x, y, width, height);
    handleError(readFBO->readPixels(this, area, format, type, pixels));
}

void Context::copyTexImage2D(GLenum target,
                             GLint level,
                             GLenum internalformat,
                             GLint x,
                             GLint y,
                             GLsizei width,
                             GLsizei height,
                             GLint border)
{
    // Only sync the read FBO
    mGLState.syncDirtyObject(this, GL_READ_FRAMEBUFFER);

    Rectangle sourceArea(x, y, width, height);

    Framebuffer *framebuffer = mGLState.getReadFramebuffer();
    Texture *texture =
        getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target);
    handleError(texture->copyImage(this, target, level, sourceArea, internalformat, framebuffer));
}

void Context::copyTexSubImage2D(GLenum target,
                                GLint level,
                                GLint xoffset,
                                GLint yoffset,
                                GLint x,
                                GLint y,
                                GLsizei width,
                                GLsizei height)
{
    if (width == 0 || height == 0)
    {
        return;
    }

    // Only sync the read FBO
    mGLState.syncDirtyObject(this, GL_READ_FRAMEBUFFER);

    Offset destOffset(xoffset, yoffset, 0);
    Rectangle sourceArea(x, y, width, height);

    Framebuffer *framebuffer = mGLState.getReadFramebuffer();
    Texture *texture =
        getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target);
    handleError(texture->copySubImage(this, target, level, destOffset, sourceArea, framebuffer));
}

void Context::copyTexSubImage3D(GLenum target,
                                GLint level,
                                GLint xoffset,
                                GLint yoffset,
                                GLint zoffset,
                                GLint x,
                                GLint y,
                                GLsizei width,
                                GLsizei height)
{
    if (width == 0 || height == 0)
    {
        return;
    }

    // Only sync the read FBO
    mGLState.syncDirtyObject(this, GL_READ_FRAMEBUFFER);

    Offset destOffset(xoffset, yoffset, zoffset);
    Rectangle sourceArea(x, y, width, height);

    Framebuffer *framebuffer = mGLState.getReadFramebuffer();
    Texture *texture         = getTargetTexture(target);
    handleError(texture->copySubImage(this, target, level, destOffset, sourceArea, framebuffer));
}

void Context::framebufferTexture2D(GLenum target,
                                   GLenum attachment,
                                   GLenum textarget,
                                   GLuint texture,
                                   GLint level)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (texture != 0)
    {
        Texture *textureObj = getTexture(texture);

        ImageIndex index = ImageIndex::MakeInvalid();

        if (textarget == GL_TEXTURE_2D)
        {
            index = ImageIndex::Make2D(level);
        }
        else if (textarget == GL_TEXTURE_RECTANGLE_ANGLE)
        {
            index = ImageIndex::MakeRectangle(level);
        }
        else if (textarget == GL_TEXTURE_2D_MULTISAMPLE)
        {
            ASSERT(level == 0);
            index = ImageIndex::Make2DMultisample();
        }
        else
        {
            ASSERT(IsCubeMapTextureTarget(textarget));
            index = ImageIndex::MakeCube(textarget, level);
        }

        framebuffer->setAttachment(this, GL_TEXTURE, attachment, index, textureObj);
    }
    else
    {
        framebuffer->resetAttachment(this, attachment);
    }

    mGLState.setObjectDirty(target);
}

void Context::framebufferRenderbuffer(GLenum target,
                                      GLenum attachment,
                                      GLenum renderbuffertarget,
                                      GLuint renderbuffer)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (renderbuffer != 0)
    {
        Renderbuffer *renderbufferObject = getRenderbuffer(renderbuffer);

        framebuffer->setAttachment(this, GL_RENDERBUFFER, attachment, gl::ImageIndex::MakeInvalid(),
                                   renderbufferObject);
    }
    else
    {
        framebuffer->resetAttachment(this, attachment);
    }

    mGLState.setObjectDirty(target);
}

void Context::framebufferTextureLayer(GLenum target,
                                      GLenum attachment,
                                      GLuint texture,
                                      GLint level,
                                      GLint layer)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (texture != 0)
    {
        Texture *textureObject = getTexture(texture);

        ImageIndex index = ImageIndex::MakeInvalid();

        if (textureObject->getTarget() == GL_TEXTURE_3D)
        {
            index = ImageIndex::Make3D(level, layer);
        }
        else
        {
            ASSERT(textureObject->getTarget() == GL_TEXTURE_2D_ARRAY);
            index = ImageIndex::Make2DArray(level, layer);
        }

        framebuffer->setAttachment(this, GL_TEXTURE, attachment, index, textureObject);
    }
    else
    {
        framebuffer->resetAttachment(this, attachment);
    }

    mGLState.setObjectDirty(target);
}

void Context::framebufferTextureMultiviewLayeredANGLE(GLenum target,
                                                      GLenum attachment,
                                                      GLuint texture,
                                                      GLint level,
                                                      GLint baseViewIndex,
                                                      GLsizei numViews)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (texture != 0)
    {
        Texture *textureObj = getTexture(texture);

        ImageIndex index = ImageIndex::Make2DArrayRange(level, baseViewIndex, numViews);
        framebuffer->setAttachmentMultiviewLayered(this, GL_TEXTURE, attachment, index, textureObj,
                                                   numViews, baseViewIndex);
    }
    else
    {
        framebuffer->resetAttachment(this, attachment);
    }

    mGLState.setObjectDirty(target);
}

void Context::framebufferTextureMultiviewSideBySideANGLE(GLenum target,
                                                         GLenum attachment,
                                                         GLuint texture,
                                                         GLint level,
                                                         GLsizei numViews,
                                                         const GLint *viewportOffsets)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (texture != 0)
    {
        Texture *textureObj = getTexture(texture);

        ImageIndex index = ImageIndex::Make2D(level);
        framebuffer->setAttachmentMultiviewSideBySide(this, GL_TEXTURE, attachment, index,
                                                      textureObj, numViews, viewportOffsets);
    }
    else
    {
        framebuffer->resetAttachment(this, attachment);
    }

    mGLState.setObjectDirty(target);
}

void Context::drawBuffers(GLsizei n, const GLenum *bufs)
{
    Framebuffer *framebuffer = mGLState.getDrawFramebuffer();
    ASSERT(framebuffer);
    framebuffer->setDrawBuffers(n, bufs);
    mGLState.setObjectDirty(GL_DRAW_FRAMEBUFFER);
}

void Context::readBuffer(GLenum mode)
{
    Framebuffer *readFBO = mGLState.getReadFramebuffer();
    readFBO->setReadBuffer(mode);
    mGLState.setObjectDirty(GL_READ_FRAMEBUFFER);
}

void Context::discardFramebuffer(GLenum target, GLsizei numAttachments, const GLenum *attachments)
{
    // Only sync the FBO
    mGLState.syncDirtyObject(this, target);

    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    // The specification isn't clear what should be done when the framebuffer isn't complete.
    // We leave it up to the framebuffer implementation to decide what to do.
    handleError(framebuffer->discard(this, numAttachments, attachments));
}

void Context::invalidateFramebuffer(GLenum target,
                                    GLsizei numAttachments,
                                    const GLenum *attachments)
{
    // Only sync the FBO
    mGLState.syncDirtyObject(this, target);

    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (framebuffer->checkStatus(this) != GL_FRAMEBUFFER_COMPLETE)
    {
        return;
    }

    handleError(framebuffer->invalidate(this, numAttachments, attachments));
}

void Context::invalidateSubFramebuffer(GLenum target,
                                       GLsizei numAttachments,
                                       const GLenum *attachments,
                                       GLint x,
                                       GLint y,
                                       GLsizei width,
                                       GLsizei height)
{
    // Only sync the FBO
    mGLState.syncDirtyObject(this, target);

    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    if (framebuffer->checkStatus(this) != GL_FRAMEBUFFER_COMPLETE)
    {
        return;
    }

    Rectangle area(x, y, width, height);
    handleError(framebuffer->invalidateSub(this, numAttachments, attachments, area));
}

void Context::texImage2D(GLenum target,
                         GLint level,
                         GLint internalformat,
                         GLsizei width,
                         GLsizei height,
                         GLint border,
                         GLenum format,
                         GLenum type,
                         const void *pixels)
{
    syncStateForTexImage();

    Extents size(width, height, 1);
    Texture *texture =
        getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target);
    handleError(texture->setImage(this, mGLState.getUnpackState(), target, level, internalformat,
                                  size, format, type, reinterpret_cast<const uint8_t *>(pixels)));
}

void Context::texImage3D(GLenum target,
                         GLint level,
                         GLint internalformat,
                         GLsizei width,
                         GLsizei height,
                         GLsizei depth,
                         GLint border,
                         GLenum format,
                         GLenum type,
                         const void *pixels)
{
    syncStateForTexImage();

    Extents size(width, height, depth);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setImage(this, mGLState.getUnpackState(), target, level, internalformat,
                                  size, format, type, reinterpret_cast<const uint8_t *>(pixels)));
}

void Context::texSubImage2D(GLenum target,
                            GLint level,
                            GLint xoffset,
                            GLint yoffset,
                            GLsizei width,
                            GLsizei height,
                            GLenum format,
                            GLenum type,
                            const void *pixels)
{
    // Zero sized uploads are valid but no-ops
    if (width == 0 || height == 0)
    {
        return;
    }

    syncStateForTexImage();

    Box area(xoffset, yoffset, 0, width, height, 1);
    Texture *texture =
        getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target);
    handleError(texture->setSubImage(this, mGLState.getUnpackState(), target, level, area, format,
                                     type, reinterpret_cast<const uint8_t *>(pixels)));
}

void Context::texSubImage3D(GLenum target,
                            GLint level,
                            GLint xoffset,
                            GLint yoffset,
                            GLint zoffset,
                            GLsizei width,
                            GLsizei height,
                            GLsizei depth,
                            GLenum format,
                            GLenum type,
                            const void *pixels)
{
    // Zero sized uploads are valid but no-ops
    if (width == 0 || height == 0 || depth == 0)
    {
        return;
    }

    syncStateForTexImage();

    Box area(xoffset, yoffset, zoffset, width, height, depth);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setSubImage(this, mGLState.getUnpackState(), target, level, area, format,
                                     type, reinterpret_cast<const uint8_t *>(pixels)));
}

void Context::compressedTexImage2D(GLenum target,
                                   GLint level,
                                   GLenum internalformat,
                                   GLsizei width,
                                   GLsizei height,
                                   GLint border,
                                   GLsizei imageSize,
                                   const void *data)
{
    syncStateForTexImage();

    Extents size(width, height, 1);
    Texture *texture =
        getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target);
    handleError(texture->setCompressedImage(this, mGLState.getUnpackState(), target, level,
                                            internalformat, size, imageSize,
                                            reinterpret_cast<const uint8_t *>(data)));
}

void Context::compressedTexImage3D(GLenum target,
                                   GLint level,
                                   GLenum internalformat,
                                   GLsizei width,
                                   GLsizei height,
                                   GLsizei depth,
                                   GLint border,
                                   GLsizei imageSize,
                                   const void *data)
{
    syncStateForTexImage();

    Extents size(width, height, depth);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setCompressedImage(this, mGLState.getUnpackState(), target, level,
                                            internalformat, size, imageSize,
                                            reinterpret_cast<const uint8_t *>(data)));
}

void Context::compressedTexSubImage2D(GLenum target,
                                      GLint level,
                                      GLint xoffset,
                                      GLint yoffset,
                                      GLsizei width,
                                      GLsizei height,
                                      GLenum format,
                                      GLsizei imageSize,
                                      const void *data)
{
    syncStateForTexImage();

    Box area(xoffset, yoffset, 0, width, height, 1);
    Texture *texture =
        getTargetTexture(IsCubeMapTextureTarget(target) ? GL_TEXTURE_CUBE_MAP : target);
    handleError(texture->setCompressedSubImage(this, mGLState.getUnpackState(), target, level, area,
                                               format, imageSize,
                                               reinterpret_cast<const uint8_t *>(data)));
}

void Context::compressedTexSubImage3D(GLenum target,
                                      GLint level,
                                      GLint xoffset,
                                      GLint yoffset,
                                      GLint zoffset,
                                      GLsizei width,
                                      GLsizei height,
                                      GLsizei depth,
                                      GLenum format,
                                      GLsizei imageSize,
                                      const void *data)
{
    // Zero sized uploads are valid but no-ops
    if (width == 0 || height == 0)
    {
        return;
    }

    syncStateForTexImage();

    Box area(xoffset, yoffset, zoffset, width, height, depth);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setCompressedSubImage(this, mGLState.getUnpackState(), target, level, area,
                                               format, imageSize,
                                               reinterpret_cast<const uint8_t *>(data)));
}

void Context::generateMipmap(GLenum target)
{
    Texture *texture = getTargetTexture(target);
    handleError(texture->generateMipmap(this));
}

void Context::copyTextureCHROMIUM(GLuint sourceId,
                                  GLint sourceLevel,
                                  GLenum destTarget,
                                  GLuint destId,
                                  GLint destLevel,
                                  GLint internalFormat,
                                  GLenum destType,
                                  GLboolean unpackFlipY,
                                  GLboolean unpackPremultiplyAlpha,
                                  GLboolean unpackUnmultiplyAlpha)
{
    syncStateForTexImage();

    gl::Texture *sourceTexture = getTexture(sourceId);
    gl::Texture *destTexture   = getTexture(destId);
    handleError(destTexture->copyTexture(
        this, destTarget, destLevel, internalFormat, destType, sourceLevel, unpackFlipY == GL_TRUE,
        unpackPremultiplyAlpha == GL_TRUE, unpackUnmultiplyAlpha == GL_TRUE, sourceTexture));
}

void Context::copySubTextureCHROMIUM(GLuint sourceId,
                                     GLint sourceLevel,
                                     GLenum destTarget,
                                     GLuint destId,
                                     GLint destLevel,
                                     GLint xoffset,
                                     GLint yoffset,
                                     GLint x,
                                     GLint y,
                                     GLsizei width,
                                     GLsizei height,
                                     GLboolean unpackFlipY,
                                     GLboolean unpackPremultiplyAlpha,
                                     GLboolean unpackUnmultiplyAlpha)
{
    // Zero sized copies are valid but no-ops
    if (width == 0 || height == 0)
    {
        return;
    }

    syncStateForTexImage();

    gl::Texture *sourceTexture = getTexture(sourceId);
    gl::Texture *destTexture   = getTexture(destId);
    Offset offset(xoffset, yoffset, 0);
    Rectangle area(x, y, width, height);
    handleError(destTexture->copySubTexture(
        this, destTarget, destLevel, offset, sourceLevel, area, unpackFlipY == GL_TRUE,
        unpackPremultiplyAlpha == GL_TRUE, unpackUnmultiplyAlpha == GL_TRUE, sourceTexture));
}

void Context::compressedCopyTextureCHROMIUM(GLuint sourceId, GLuint destId)
{
    syncStateForTexImage();

    gl::Texture *sourceTexture = getTexture(sourceId);
    gl::Texture *destTexture   = getTexture(destId);
    handleError(destTexture->copyCompressedTexture(this, sourceTexture));
}

void Context::getBufferPointerv(GLenum target, GLenum pname, void **params)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    ASSERT(buffer);

    QueryBufferPointerv(buffer, pname, params);
}

void *Context::mapBuffer(GLenum target, GLenum access)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    ASSERT(buffer);

    Error error = buffer->map(this, access);
    if (error.isError())
    {
        handleError(error);
        return nullptr;
    }

    return buffer->getMapPointer();
}

GLboolean Context::unmapBuffer(GLenum target)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    ASSERT(buffer);

    GLboolean result;
    Error error = buffer->unmap(this, &result);
    if (error.isError())
    {
        handleError(error);
        return GL_FALSE;
    }

    return result;
}

void *Context::mapBufferRange(GLenum target, GLintptr offset, GLsizeiptr length, GLbitfield access)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    ASSERT(buffer);

    Error error = buffer->mapRange(this, offset, length, access);
    if (error.isError())
    {
        handleError(error);
        return nullptr;
    }

    return buffer->getMapPointer();
}

void Context::flushMappedBufferRange(GLenum /*target*/, GLintptr /*offset*/, GLsizeiptr /*length*/)
{
    // We do not currently support a non-trivial implementation of FlushMappedBufferRange
}

void Context::syncStateForReadPixels()
{
    syncRendererState(mReadPixelsDirtyBits, mReadPixelsDirtyObjects);
}

void Context::syncStateForTexImage()
{
    syncRendererState(mTexImageDirtyBits, mTexImageDirtyObjects);
}

void Context::syncStateForClear()
{
    syncRendererState(mClearDirtyBits, mClearDirtyObjects);
}

void Context::syncStateForBlit()
{
    syncRendererState(mBlitDirtyBits, mBlitDirtyObjects);
}

void Context::activeTexture(GLenum texture)
{
    mGLState.setActiveSampler(texture - GL_TEXTURE0);
}

void Context::blendColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
{
    mGLState.setBlendColor(clamp01(red), clamp01(green), clamp01(blue), clamp01(alpha));
}

void Context::blendEquation(GLenum mode)
{
    mGLState.setBlendEquation(mode, mode);
}

void Context::blendEquationSeparate(GLenum modeRGB, GLenum modeAlpha)
{
    mGLState.setBlendEquation(modeRGB, modeAlpha);
}

void Context::blendFunc(GLenum sfactor, GLenum dfactor)
{
    mGLState.setBlendFactors(sfactor, dfactor, sfactor, dfactor);
}

void Context::blendFuncSeparate(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha)
{
    mGLState.setBlendFactors(srcRGB, dstRGB, srcAlpha, dstAlpha);
}

void Context::clearColor(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
{
    mGLState.setColorClearValue(red, green, blue, alpha);
}

void Context::clearDepthf(GLfloat depth)
{
    mGLState.setDepthClearValue(depth);
}

void Context::clearStencil(GLint s)
{
    mGLState.setStencilClearValue(s);
}

void Context::colorMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha)
{
    mGLState.setColorMask(red == GL_TRUE, green == GL_TRUE, blue == GL_TRUE, alpha == GL_TRUE);
}

void Context::cullFace(CullFaceMode mode)
{
    mGLState.setCullMode(mode);
}

void Context::depthFunc(GLenum func)
{
    mGLState.setDepthFunc(func);
}

void Context::depthMask(GLboolean flag)
{
    mGLState.setDepthMask(flag != GL_FALSE);
}

void Context::depthRangef(GLfloat zNear, GLfloat zFar)
{
    mGLState.setDepthRange(zNear, zFar);
}

void Context::disable(GLenum cap)
{
    mGLState.setEnableFeature(cap, false);
}

void Context::disableVertexAttribArray(GLuint index)
{
    mGLState.setEnableVertexAttribArray(index, false);
}

void Context::enable(GLenum cap)
{
    mGLState.setEnableFeature(cap, true);
}

void Context::enableVertexAttribArray(GLuint index)
{
    mGLState.setEnableVertexAttribArray(index, true);
}

void Context::frontFace(GLenum mode)
{
    mGLState.setFrontFace(mode);
}

void Context::hint(GLenum target, GLenum mode)
{
    switch (target)
    {
        case GL_GENERATE_MIPMAP_HINT:
            mGLState.setGenerateMipmapHint(mode);
            break;

        case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
            mGLState.setFragmentShaderDerivativeHint(mode);
            break;

        default:
            UNREACHABLE();
            return;
    }
}

void Context::lineWidth(GLfloat width)
{
    mGLState.setLineWidth(width);
}

void Context::pixelStorei(GLenum pname, GLint param)
{
    switch (pname)
    {
        case GL_UNPACK_ALIGNMENT:
            mGLState.setUnpackAlignment(param);
            break;

        case GL_PACK_ALIGNMENT:
            mGLState.setPackAlignment(param);
            break;

        case GL_PACK_REVERSE_ROW_ORDER_ANGLE:
            mGLState.setPackReverseRowOrder(param != 0);
            break;

        case GL_UNPACK_ROW_LENGTH:
            ASSERT((getClientMajorVersion() >= 3) || getExtensions().unpackSubimage);
            mGLState.setUnpackRowLength(param);
            break;

        case GL_UNPACK_IMAGE_HEIGHT:
            ASSERT(getClientMajorVersion() >= 3);
            mGLState.setUnpackImageHeight(param);
            break;

        case GL_UNPACK_SKIP_IMAGES:
            ASSERT(getClientMajorVersion() >= 3);
            mGLState.setUnpackSkipImages(param);
            break;

        case GL_UNPACK_SKIP_ROWS:
            ASSERT((getClientMajorVersion() >= 3) || getExtensions().unpackSubimage);
            mGLState.setUnpackSkipRows(param);
            break;

        case GL_UNPACK_SKIP_PIXELS:
            ASSERT((getClientMajorVersion() >= 3) || getExtensions().unpackSubimage);
            mGLState.setUnpackSkipPixels(param);
            break;

        case GL_PACK_ROW_LENGTH:
            ASSERT((getClientMajorVersion() >= 3) || getExtensions().packSubimage);
            mGLState.setPackRowLength(param);
            break;

        case GL_PACK_SKIP_ROWS:
            ASSERT((getClientMajorVersion() >= 3) || getExtensions().packSubimage);
            mGLState.setPackSkipRows(param);
            break;

        case GL_PACK_SKIP_PIXELS:
            ASSERT((getClientMajorVersion() >= 3) || getExtensions().packSubimage);
            mGLState.setPackSkipPixels(param);
            break;

        default:
            UNREACHABLE();
            return;
    }
}

void Context::polygonOffset(GLfloat factor, GLfloat units)
{
    mGLState.setPolygonOffsetParams(factor, units);
}

void Context::sampleCoverage(GLfloat value, GLboolean invert)
{
    mGLState.setSampleCoverageParams(clamp01(value), invert == GL_TRUE);
}

void Context::sampleMaski(GLuint maskNumber, GLbitfield mask)
{
    mGLState.setSampleMaskParams(maskNumber, mask);
}

void Context::scissor(GLint x, GLint y, GLsizei width, GLsizei height)
{
    mGLState.setScissorParams(x, y, width, height);
}

void Context::stencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
{
    if (face == GL_FRONT || face == GL_FRONT_AND_BACK)
    {
        mGLState.setStencilParams(func, ref, mask);
    }

    if (face == GL_BACK || face == GL_FRONT_AND_BACK)
    {
        mGLState.setStencilBackParams(func, ref, mask);
    }
}

void Context::stencilMaskSeparate(GLenum face, GLuint mask)
{
    if (face == GL_FRONT || face == GL_FRONT_AND_BACK)
    {
        mGLState.setStencilWritemask(mask);
    }

    if (face == GL_BACK || face == GL_FRONT_AND_BACK)
    {
        mGLState.setStencilBackWritemask(mask);
    }
}

void Context::stencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass)
{
    if (face == GL_FRONT || face == GL_FRONT_AND_BACK)
    {
        mGLState.setStencilOperations(fail, zfail, zpass);
    }

    if (face == GL_BACK || face == GL_FRONT_AND_BACK)
    {
        mGLState.setStencilBackOperations(fail, zfail, zpass);
    }
}

void Context::vertexAttrib1f(GLuint index, GLfloat x)
{
    GLfloat vals[4] = {x, 0, 0, 1};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib1fv(GLuint index, const GLfloat *values)
{
    GLfloat vals[4] = {values[0], 0, 0, 1};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib2f(GLuint index, GLfloat x, GLfloat y)
{
    GLfloat vals[4] = {x, y, 0, 1};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib2fv(GLuint index, const GLfloat *values)
{
    GLfloat vals[4] = {values[0], values[1], 0, 1};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib3f(GLuint index, GLfloat x, GLfloat y, GLfloat z)
{
    GLfloat vals[4] = {x, y, z, 1};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib3fv(GLuint index, const GLfloat *values)
{
    GLfloat vals[4] = {values[0], values[1], values[2], 1};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
    GLfloat vals[4] = {x, y, z, w};
    mGLState.setVertexAttribf(index, vals);
}

void Context::vertexAttrib4fv(GLuint index, const GLfloat *values)
{
    mGLState.setVertexAttribf(index, values);
}

void Context::vertexAttribPointer(GLuint index,
                                  GLint size,
                                  GLenum type,
                                  GLboolean normalized,
                                  GLsizei stride,
                                  const void *ptr)
{
    mGLState.setVertexAttribPointer(this, index, mGLState.getTargetBuffer(GL_ARRAY_BUFFER), size,
                                    type, normalized == GL_TRUE, false, stride, ptr);
}

void Context::vertexAttribFormat(GLuint attribIndex,
                                 GLint size,
                                 GLenum type,
                                 GLboolean normalized,
                                 GLuint relativeOffset)
{
    mGLState.setVertexAttribFormat(attribIndex, size, type, normalized == GL_TRUE, false,
                                   relativeOffset);
}

void Context::vertexAttribIFormat(GLuint attribIndex,
                                  GLint size,
                                  GLenum type,
                                  GLuint relativeOffset)
{
    mGLState.setVertexAttribFormat(attribIndex, size, type, false, true, relativeOffset);
}

void Context::vertexAttribBinding(GLuint attribIndex, GLuint bindingIndex)
{
    mGLState.setVertexAttribBinding(this, attribIndex, bindingIndex);
}

void Context::setVertexBindingDivisor(GLuint bindingIndex, GLuint divisor)
{
    mGLState.setVertexBindingDivisor(bindingIndex, divisor);
}

void Context::viewport(GLint x, GLint y, GLsizei width, GLsizei height)
{
    mGLState.setViewportParams(x, y, width, height);
}

void Context::vertexAttribIPointer(GLuint index,
                                   GLint size,
                                   GLenum type,
                                   GLsizei stride,
                                   const void *pointer)
{
    mGLState.setVertexAttribPointer(this, index, mGLState.getTargetBuffer(GL_ARRAY_BUFFER), size,
                                    type, false, true, stride, pointer);
}

void Context::vertexAttribI4i(GLuint index, GLint x, GLint y, GLint z, GLint w)
{
    GLint vals[4] = {x, y, z, w};
    mGLState.setVertexAttribi(index, vals);
}

void Context::vertexAttribI4ui(GLuint index, GLuint x, GLuint y, GLuint z, GLuint w)
{
    GLuint vals[4] = {x, y, z, w};
    mGLState.setVertexAttribu(index, vals);
}

void Context::vertexAttribI4iv(GLuint index, const GLint *v)
{
    mGLState.setVertexAttribi(index, v);
}

void Context::vertexAttribI4uiv(GLuint index, const GLuint *v)
{
    mGLState.setVertexAttribu(index, v);
}

void Context::getVertexAttribiv(GLuint index, GLenum pname, GLint *params)
{
    const VertexAttribCurrentValueData &currentValues =
        getGLState().getVertexAttribCurrentValue(index);
    const VertexArray *vao = getGLState().getVertexArray();
    QueryVertexAttribiv(vao->getVertexAttribute(index), vao->getBindingFromAttribIndex(index),
                        currentValues, pname, params);
}

void Context::getVertexAttribfv(GLuint index, GLenum pname, GLfloat *params)
{
    const VertexAttribCurrentValueData &currentValues =
        getGLState().getVertexAttribCurrentValue(index);
    const VertexArray *vao = getGLState().getVertexArray();
    QueryVertexAttribfv(vao->getVertexAttribute(index), vao->getBindingFromAttribIndex(index),
                        currentValues, pname, params);
}

void Context::getVertexAttribIiv(GLuint index, GLenum pname, GLint *params)
{
    const VertexAttribCurrentValueData &currentValues =
        getGLState().getVertexAttribCurrentValue(index);
    const VertexArray *vao = getGLState().getVertexArray();
    QueryVertexAttribIiv(vao->getVertexAttribute(index), vao->getBindingFromAttribIndex(index),
                         currentValues, pname, params);
}

void Context::getVertexAttribIuiv(GLuint index, GLenum pname, GLuint *params)
{
    const VertexAttribCurrentValueData &currentValues =
        getGLState().getVertexAttribCurrentValue(index);
    const VertexArray *vao = getGLState().getVertexArray();
    QueryVertexAttribIuiv(vao->getVertexAttribute(index), vao->getBindingFromAttribIndex(index),
                          currentValues, pname, params);
}

void Context::getVertexAttribPointerv(GLuint index, GLenum pname, void **pointer)
{
    const VertexAttribute &attrib = getGLState().getVertexArray()->getVertexAttribute(index);
    QueryVertexAttribPointerv(attrib, pname, pointer);
}

void Context::debugMessageControl(GLenum source,
                                  GLenum type,
                                  GLenum severity,
                                  GLsizei count,
                                  const GLuint *ids,
                                  GLboolean enabled)
{
    std::vector<GLuint> idVector(ids, ids + count);
    mGLState.getDebug().setMessageControl(source, type, severity, std::move(idVector),
                                          (enabled != GL_FALSE));
}

void Context::debugMessageInsert(GLenum source,
                                 GLenum type,
                                 GLuint id,
                                 GLenum severity,
                                 GLsizei length,
                                 const GLchar *buf)
{
    std::string msg(buf, (length > 0) ? static_cast<size_t>(length) : strlen(buf));
    mGLState.getDebug().insertMessage(source, type, id, severity, std::move(msg));
}

void Context::debugMessageCallback(GLDEBUGPROCKHR callback, const void *userParam)
{
    mGLState.getDebug().setCallback(callback, userParam);
}

GLuint Context::getDebugMessageLog(GLuint count,
                                   GLsizei bufSize,
                                   GLenum *sources,
                                   GLenum *types,
                                   GLuint *ids,
                                   GLenum *severities,
                                   GLsizei *lengths,
                                   GLchar *messageLog)
{
    return static_cast<GLuint>(mGLState.getDebug().getMessages(count, bufSize, sources, types, ids,
                                                               severities, lengths, messageLog));
}

void Context::pushDebugGroup(GLenum source, GLuint id, GLsizei length, const GLchar *message)
{
    std::string msg(message, (length > 0) ? static_cast<size_t>(length) : strlen(message));
    mGLState.getDebug().pushGroup(source, id, std::move(msg));
}

void Context::popDebugGroup()
{
    mGLState.getDebug().popGroup();
}

void Context::bufferData(GLenum target, GLsizeiptr size, const void *data, BufferUsage usage)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    ASSERT(buffer);
    handleError(buffer->bufferData(this, target, data, size, usage));
}

void Context::bufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const void *data)
{
    if (data == nullptr)
    {
        return;
    }

    Buffer *buffer = mGLState.getTargetBuffer(target);
    ASSERT(buffer);
    handleError(buffer->bufferSubData(this, target, data, size, offset));
}

void Context::attachShader(GLuint program, GLuint shader)
{
    auto programObject = mState.mShaderPrograms->getProgram(program);
    auto shaderObject  = mState.mShaderPrograms->getShader(shader);
    ASSERT(programObject && shaderObject);
    programObject->attachShader(shaderObject);
}

const Workarounds &Context::getWorkarounds() const
{
    return mWorkarounds;
}

void Context::copyBufferSubData(GLenum readTarget,
                                GLenum writeTarget,
                                GLintptr readOffset,
                                GLintptr writeOffset,
                                GLsizeiptr size)
{
    // if size is zero, the copy is a successful no-op
    if (size == 0)
    {
        return;
    }

    // TODO(jmadill): cache these.
    Buffer *readBuffer  = mGLState.getTargetBuffer(readTarget);
    Buffer *writeBuffer = mGLState.getTargetBuffer(writeTarget);

    handleError(writeBuffer->copyBufferSubData(this, readBuffer, readOffset, writeOffset, size));
}

void Context::bindAttribLocation(GLuint program, GLuint index, const GLchar *name)
{
    Program *programObject = getProgram(program);
    // TODO(jmadill): Re-use this from the validation if possible.
    ASSERT(programObject);
    programObject->bindAttributeLocation(index, name);
}

void Context::bindBuffer(GLenum target, GLuint buffer)
{
    switch (target)
    {
        case GL_ARRAY_BUFFER:
            bindArrayBuffer(buffer);
            break;
        case GL_ELEMENT_ARRAY_BUFFER:
            bindElementArrayBuffer(buffer);
            break;
        case GL_COPY_READ_BUFFER:
            bindCopyReadBuffer(buffer);
            break;
        case GL_COPY_WRITE_BUFFER:
            bindCopyWriteBuffer(buffer);
            break;
        case GL_PIXEL_PACK_BUFFER:
            bindPixelPackBuffer(buffer);
            break;
        case GL_PIXEL_UNPACK_BUFFER:
            bindPixelUnpackBuffer(buffer);
            break;
        case GL_UNIFORM_BUFFER:
            bindGenericUniformBuffer(buffer);
            break;
        case GL_TRANSFORM_FEEDBACK_BUFFER:
            bindGenericTransformFeedbackBuffer(buffer);
            break;
        case GL_ATOMIC_COUNTER_BUFFER:
            bindGenericAtomicCounterBuffer(buffer);
            break;
        case GL_SHADER_STORAGE_BUFFER:
            bindGenericShaderStorageBuffer(buffer);
            break;
        case GL_DRAW_INDIRECT_BUFFER:
            bindDrawIndirectBuffer(buffer);
            break;
        case GL_DISPATCH_INDIRECT_BUFFER:
            if (buffer != 0)
            {
                // Binding buffers to this binding point is not implemented yet.
                UNIMPLEMENTED();
            }
            break;

        default:
            UNREACHABLE();
            break;
    }
}

void Context::bindBufferBase(GLenum target, GLuint index, GLuint buffer)
{
    bindBufferRange(target, index, buffer, 0, 0);
}

void Context::bindBufferRange(GLenum target,
                              GLuint index,
                              GLuint buffer,
                              GLintptr offset,
                              GLsizeiptr size)
{
    switch (target)
    {
        case GL_TRANSFORM_FEEDBACK_BUFFER:
            bindIndexedTransformFeedbackBuffer(buffer, index, offset, size);
            bindGenericTransformFeedbackBuffer(buffer);
            break;
        case GL_UNIFORM_BUFFER:
            bindIndexedUniformBuffer(buffer, index, offset, size);
            bindGenericUniformBuffer(buffer);
            break;
        case GL_ATOMIC_COUNTER_BUFFER:
            bindIndexedAtomicCounterBuffer(buffer, index, offset, size);
            bindGenericAtomicCounterBuffer(buffer);
            break;
        case GL_SHADER_STORAGE_BUFFER:
            bindIndexedShaderStorageBuffer(buffer, index, offset, size);
            bindGenericShaderStorageBuffer(buffer);
            break;
        default:
            UNREACHABLE();
            break;
    }
}

void Context::bindFramebuffer(GLenum target, GLuint framebuffer)
{
    if (target == GL_READ_FRAMEBUFFER || target == GL_FRAMEBUFFER)
    {
        bindReadFramebuffer(framebuffer);
    }

    if (target == GL_DRAW_FRAMEBUFFER || target == GL_FRAMEBUFFER)
    {
        bindDrawFramebuffer(framebuffer);
    }
}

void Context::bindRenderbuffer(GLenum target, GLuint renderbuffer)
{
    ASSERT(target == GL_RENDERBUFFER);
    Renderbuffer *object =
        mState.mRenderbuffers->checkRenderbufferAllocation(mImplementation.get(), renderbuffer);
    mGLState.setRenderbufferBinding(this, object);
}

void Context::texStorage2DMultisample(GLenum target,
                                      GLsizei samples,
                                      GLenum internalformat,
                                      GLsizei width,
                                      GLsizei height,
                                      GLboolean fixedsamplelocations)
{
    Extents size(width, height, 1);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setStorageMultisample(this, target, samples, internalformat, size,
                                               fixedsamplelocations));
}

void Context::getMultisamplefv(GLenum pname, GLuint index, GLfloat *val)
{
    // According to spec 3.1 Table 20.49: Framebuffer Dependent Values,
    // the sample position should be queried by DRAW_FRAMEBUFFER.
    mGLState.syncDirtyObject(this, GL_DRAW_FRAMEBUFFER);
    const Framebuffer *framebuffer = mGLState.getDrawFramebuffer();

    switch (pname)
    {
        case GL_SAMPLE_POSITION:
            handleError(framebuffer->getSamplePosition(index, val));
            break;
        default:
            UNREACHABLE();
    }
}

void Context::renderbufferStorage(GLenum target,
                                  GLenum internalformat,
                                  GLsizei width,
                                  GLsizei height)
{
    // Hack for the special WebGL 1 "DEPTH_STENCIL" internal format.
    GLenum convertedInternalFormat = getConvertedRenderbufferFormat(internalformat);

    Renderbuffer *renderbuffer = mGLState.getCurrentRenderbuffer();
    handleError(renderbuffer->setStorage(this, convertedInternalFormat, width, height));
}

void Context::renderbufferStorageMultisample(GLenum target,
                                             GLsizei samples,
                                             GLenum internalformat,
                                             GLsizei width,
                                             GLsizei height)
{
    // Hack for the special WebGL 1 "DEPTH_STENCIL" internal format.
    GLenum convertedInternalFormat = getConvertedRenderbufferFormat(internalformat);

    Renderbuffer *renderbuffer = mGLState.getCurrentRenderbuffer();
    handleError(
        renderbuffer->setStorageMultisample(this, samples, convertedInternalFormat, width, height));
}

void Context::getSynciv(GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values)
{
    const Sync *syncObject = getSync(sync);
    handleError(QuerySynciv(syncObject, pname, bufSize, length, values));
}

void Context::getFramebufferParameteriv(GLenum target, GLenum pname, GLint *params)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    QueryFramebufferParameteriv(framebuffer, pname, params);
}

void Context::setFramebufferParameteri(GLenum target, GLenum pname, GLint param)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    SetFramebufferParameteri(framebuffer, pname, param);
}

Error Context::getScratchBuffer(size_t requstedSizeBytes,
                                angle::MemoryBuffer **scratchBufferOut) const
{
    if (!mScratchBuffer.get(requstedSizeBytes, scratchBufferOut))
    {
        return OutOfMemory() << "Failed to allocate internal buffer.";
    }
    return NoError();
}

Error Context::getZeroFilledBuffer(size_t requstedSizeBytes,
                                   angle::MemoryBuffer **zeroBufferOut) const
{
    if (!mZeroFilledBuffer.getInitialized(requstedSizeBytes, zeroBufferOut, 0))
    {
        return OutOfMemory() << "Failed to allocate internal buffer.";
    }
    return NoError();
}

void Context::dispatchCompute(GLuint numGroupsX, GLuint numGroupsY, GLuint numGroupsZ)
{
    if (numGroupsX == 0u || numGroupsY == 0u || numGroupsZ == 0u)
    {
        return;
    }

    // TODO(jmadill): Dirty bits for compute.
    ANGLE_CONTEXT_TRY(mGLState.clearUnclearedActiveTextures(this));

    handleError(mImplementation->dispatchCompute(this, numGroupsX, numGroupsY, numGroupsZ));
}

void Context::texStorage2D(GLenum target,
                           GLsizei levels,
                           GLenum internalFormat,
                           GLsizei width,
                           GLsizei height)
{
    Extents size(width, height, 1);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setStorage(this, target, levels, internalFormat, size));
}

void Context::texStorage3D(GLenum target,
                           GLsizei levels,
                           GLenum internalFormat,
                           GLsizei width,
                           GLsizei height,
                           GLsizei depth)
{
    Extents size(width, height, depth);
    Texture *texture = getTargetTexture(target);
    handleError(texture->setStorage(this, target, levels, internalFormat, size));
}

GLenum Context::checkFramebufferStatus(GLenum target)
{
    Framebuffer *framebuffer = mGLState.getTargetFramebuffer(target);
    ASSERT(framebuffer);

    return framebuffer->checkStatus(this);
}

void Context::compileShader(GLuint shader)
{
    Shader *shaderObject = GetValidShader(this, shader);
    if (!shaderObject)
    {
        return;
    }
    shaderObject->compile(this);
}

void Context::deleteBuffers(GLsizei n, const GLuint *buffers)
{
    for (int i = 0; i < n; i++)
    {
        deleteBuffer(buffers[i]);
    }
}

void Context::deleteFramebuffers(GLsizei n, const GLuint *framebuffers)
{
    for (int i = 0; i < n; i++)
    {
        if (framebuffers[i] != 0)
        {
            deleteFramebuffer(framebuffers[i]);
        }
    }
}

void Context::deleteRenderbuffers(GLsizei n, const GLuint *renderbuffers)
{
    for (int i = 0; i < n; i++)
    {
        deleteRenderbuffer(renderbuffers[i]);
    }
}

void Context::deleteTextures(GLsizei n, const GLuint *textures)
{
    for (int i = 0; i < n; i++)
    {
        if (textures[i] != 0)
        {
            deleteTexture(textures[i]);
        }
    }
}

void Context::detachShader(GLuint program, GLuint shader)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);

    Shader *shaderObject = getShader(shader);
    ASSERT(shaderObject);

    programObject->detachShader(this, shaderObject);
}

void Context::genBuffers(GLsizei n, GLuint *buffers)
{
    for (int i = 0; i < n; i++)
    {
        buffers[i] = createBuffer();
    }
}

void Context::genFramebuffers(GLsizei n, GLuint *framebuffers)
{
    for (int i = 0; i < n; i++)
    {
        framebuffers[i] = createFramebuffer();
    }
}

void Context::genRenderbuffers(GLsizei n, GLuint *renderbuffers)
{
    for (int i = 0; i < n; i++)
    {
        renderbuffers[i] = createRenderbuffer();
    }
}

void Context::genTextures(GLsizei n, GLuint *textures)
{
    for (int i = 0; i < n; i++)
    {
        textures[i] = createTexture();
    }
}

void Context::getActiveAttrib(GLuint program,
                              GLuint index,
                              GLsizei bufsize,
                              GLsizei *length,
                              GLint *size,
                              GLenum *type,
                              GLchar *name)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getActiveAttribute(index, bufsize, length, size, type, name);
}

void Context::getActiveUniform(GLuint program,
                               GLuint index,
                               GLsizei bufsize,
                               GLsizei *length,
                               GLint *size,
                               GLenum *type,
                               GLchar *name)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getActiveUniform(index, bufsize, length, size, type, name);
}

void Context::getAttachedShaders(GLuint program, GLsizei maxcount, GLsizei *count, GLuint *shaders)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getAttachedShaders(maxcount, count, shaders);
}

GLint Context::getAttribLocation(GLuint program, const GLchar *name)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    return programObject->getAttributeLocation(name);
}

void Context::getBooleanv(GLenum pname, GLboolean *params)
{
    GLenum nativeType;
    unsigned int numParams = 0;
    getQueryParameterInfo(pname, &nativeType, &numParams);

    if (nativeType == GL_BOOL)
    {
        getBooleanvImpl(pname, params);
    }
    else
    {
        CastStateValues(this, nativeType, pname, numParams, params);
    }
}

void Context::getFloatv(GLenum pname, GLfloat *params)
{
    GLenum nativeType;
    unsigned int numParams = 0;
    getQueryParameterInfo(pname, &nativeType, &numParams);

    if (nativeType == GL_FLOAT)
    {
        getFloatvImpl(pname, params);
    }
    else
    {
        CastStateValues(this, nativeType, pname, numParams, params);
    }
}

void Context::getIntegerv(GLenum pname, GLint *params)
{
    GLenum nativeType;
    unsigned int numParams = 0;
    getQueryParameterInfo(pname, &nativeType, &numParams);

    if (nativeType == GL_INT)
    {
        getIntegervImpl(pname, params);
    }
    else
    {
        CastStateValues(this, nativeType, pname, numParams, params);
    }
}

void Context::getProgramiv(GLuint program, GLenum pname, GLint *params)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    QueryProgramiv(this, programObject, pname, params);
}

void Context::getProgramInfoLog(GLuint program, GLsizei bufsize, GLsizei *length, GLchar *infolog)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getInfoLog(bufsize, length, infolog);
}

void Context::getShaderiv(GLuint shader, GLenum pname, GLint *params)
{
    Shader *shaderObject = getShader(shader);
    ASSERT(shaderObject);
    QueryShaderiv(this, shaderObject, pname, params);
}

void Context::getShaderInfoLog(GLuint shader, GLsizei bufsize, GLsizei *length, GLchar *infolog)
{
    Shader *shaderObject = getShader(shader);
    ASSERT(shaderObject);
    shaderObject->getInfoLog(this, bufsize, length, infolog);
}

void Context::getShaderPrecisionFormat(GLenum shadertype,
                                       GLenum precisiontype,
                                       GLint *range,
                                       GLint *precision)
{
    // TODO(jmadill): Compute shaders.

    switch (shadertype)
    {
        case GL_VERTEX_SHADER:
            switch (precisiontype)
            {
                case GL_LOW_FLOAT:
                    mCaps.vertexLowpFloat.get(range, precision);
                    break;
                case GL_MEDIUM_FLOAT:
                    mCaps.vertexMediumpFloat.get(range, precision);
                    break;
                case GL_HIGH_FLOAT:
                    mCaps.vertexHighpFloat.get(range, precision);
                    break;

                case GL_LOW_INT:
                    mCaps.vertexLowpInt.get(range, precision);
                    break;
                case GL_MEDIUM_INT:
                    mCaps.vertexMediumpInt.get(range, precision);
                    break;
                case GL_HIGH_INT:
                    mCaps.vertexHighpInt.get(range, precision);
                    break;

                default:
                    UNREACHABLE();
                    return;
            }
            break;

        case GL_FRAGMENT_SHADER:
            switch (precisiontype)
            {
                case GL_LOW_FLOAT:
                    mCaps.fragmentLowpFloat.get(range, precision);
                    break;
                case GL_MEDIUM_FLOAT:
                    mCaps.fragmentMediumpFloat.get(range, precision);
                    break;
                case GL_HIGH_FLOAT:
                    mCaps.fragmentHighpFloat.get(range, precision);
                    break;

                case GL_LOW_INT:
                    mCaps.fragmentLowpInt.get(range, precision);
                    break;
                case GL_MEDIUM_INT:
                    mCaps.fragmentMediumpInt.get(range, precision);
                    break;
                case GL_HIGH_INT:
                    mCaps.fragmentHighpInt.get(range, precision);
                    break;

                default:
                    UNREACHABLE();
                    return;
            }
            break;

        default:
            UNREACHABLE();
            return;
    }
}

void Context::getShaderSource(GLuint shader, GLsizei bufsize, GLsizei *length, GLchar *source)
{
    Shader *shaderObject = getShader(shader);
    ASSERT(shaderObject);
    shaderObject->getSource(bufsize, length, source);
}

void Context::getUniformfv(GLuint program, GLint location, GLfloat *params)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getUniformfv(this, location, params);
}

void Context::getUniformiv(GLuint program, GLint location, GLint *params)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getUniformiv(this, location, params);
}

GLint Context::getUniformLocation(GLuint program, const GLchar *name)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    return programObject->getUniformLocation(name);
}

GLboolean Context::isBuffer(GLuint buffer)
{
    if (buffer == 0)
    {
        return GL_FALSE;
    }

    return (getBuffer(buffer) ? GL_TRUE : GL_FALSE);
}

GLboolean Context::isEnabled(GLenum cap)
{
    return mGLState.getEnableFeature(cap);
}

GLboolean Context::isFramebuffer(GLuint framebuffer)
{
    if (framebuffer == 0)
    {
        return GL_FALSE;
    }

    return (getFramebuffer(framebuffer) ? GL_TRUE : GL_FALSE);
}

GLboolean Context::isProgram(GLuint program)
{
    if (program == 0)
    {
        return GL_FALSE;
    }

    return (getProgram(program) ? GL_TRUE : GL_FALSE);
}

GLboolean Context::isRenderbuffer(GLuint renderbuffer)
{
    if (renderbuffer == 0)
    {
        return GL_FALSE;
    }

    return (getRenderbuffer(renderbuffer) ? GL_TRUE : GL_FALSE);
}

GLboolean Context::isShader(GLuint shader)
{
    if (shader == 0)
    {
        return GL_FALSE;
    }

    return (getShader(shader) ? GL_TRUE : GL_FALSE);
}

GLboolean Context::isTexture(GLuint texture)
{
    if (texture == 0)
    {
        return GL_FALSE;
    }

    return (getTexture(texture) ? GL_TRUE : GL_FALSE);
}

void Context::linkProgram(GLuint program)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    handleError(programObject->link(this));
    mGLState.onProgramExecutableChange(programObject);
}

void Context::releaseShaderCompiler()
{
    mCompiler.set(this, nullptr);
}

void Context::shaderBinary(GLsizei n,
                           const GLuint *shaders,
                           GLenum binaryformat,
                           const void *binary,
                           GLsizei length)
{
    // No binary shader formats are supported.
    UNIMPLEMENTED();
}

void Context::shaderSource(GLuint shader,
                           GLsizei count,
                           const GLchar *const *string,
                           const GLint *length)
{
    Shader *shaderObject = getShader(shader);
    ASSERT(shaderObject);
    shaderObject->setSource(count, string, length);
}

void Context::stencilFunc(GLenum func, GLint ref, GLuint mask)
{
    stencilFuncSeparate(GL_FRONT_AND_BACK, func, ref, mask);
}

void Context::stencilMask(GLuint mask)
{
    stencilMaskSeparate(GL_FRONT_AND_BACK, mask);
}

void Context::stencilOp(GLenum fail, GLenum zfail, GLenum zpass)
{
    stencilOpSeparate(GL_FRONT_AND_BACK, fail, zfail, zpass);
}

void Context::uniform1f(GLint location, GLfloat x)
{
    Program *program = mGLState.getProgram();
    program->setUniform1fv(location, 1, &x);
}

void Context::uniform1fv(GLint location, GLsizei count, const GLfloat *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform1fv(location, count, v);
}

void Context::uniform1i(GLint location, GLint x)
{
    Program *program = mGLState.getProgram();
    if (program->setUniform1iv(location, 1, &x) == Program::SetUniformResult::SamplerChanged)
    {
        mGLState.setObjectDirty(GL_PROGRAM);
    }
}

void Context::uniform1iv(GLint location, GLsizei count, const GLint *v)
{
    Program *program = mGLState.getProgram();
    if (program->setUniform1iv(location, count, v) == Program::SetUniformResult::SamplerChanged)
    {
        mGLState.setObjectDirty(GL_PROGRAM);
    }
}

void Context::uniform2f(GLint location, GLfloat x, GLfloat y)
{
    GLfloat xy[2]    = {x, y};
    Program *program = mGLState.getProgram();
    program->setUniform2fv(location, 1, xy);
}

void Context::uniform2fv(GLint location, GLsizei count, const GLfloat *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform2fv(location, count, v);
}

void Context::uniform2i(GLint location, GLint x, GLint y)
{
    GLint xy[2]      = {x, y};
    Program *program = mGLState.getProgram();
    program->setUniform2iv(location, 1, xy);
}

void Context::uniform2iv(GLint location, GLsizei count, const GLint *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform2iv(location, count, v);
}

void Context::uniform3f(GLint location, GLfloat x, GLfloat y, GLfloat z)
{
    GLfloat xyz[3]   = {x, y, z};
    Program *program = mGLState.getProgram();
    program->setUniform3fv(location, 1, xyz);
}

void Context::uniform3fv(GLint location, GLsizei count, const GLfloat *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform3fv(location, count, v);
}

void Context::uniform3i(GLint location, GLint x, GLint y, GLint z)
{
    GLint xyz[3]     = {x, y, z};
    Program *program = mGLState.getProgram();
    program->setUniform3iv(location, 1, xyz);
}

void Context::uniform3iv(GLint location, GLsizei count, const GLint *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform3iv(location, count, v);
}

void Context::uniform4f(GLint location, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
    GLfloat xyzw[4]  = {x, y, z, w};
    Program *program = mGLState.getProgram();
    program->setUniform4fv(location, 1, xyzw);
}

void Context::uniform4fv(GLint location, GLsizei count, const GLfloat *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform4fv(location, count, v);
}

void Context::uniform4i(GLint location, GLint x, GLint y, GLint z, GLint w)
{
    GLint xyzw[4]    = {x, y, z, w};
    Program *program = mGLState.getProgram();
    program->setUniform4iv(location, 1, xyzw);
}

void Context::uniform4iv(GLint location, GLsizei count, const GLint *v)
{
    Program *program = mGLState.getProgram();
    program->setUniform4iv(location, count, v);
}

void Context::uniformMatrix2fv(GLint location,
                               GLsizei count,
                               GLboolean transpose,
                               const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix2fv(location, count, transpose, value);
}

void Context::uniformMatrix3fv(GLint location,
                               GLsizei count,
                               GLboolean transpose,
                               const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix3fv(location, count, transpose, value);
}

void Context::uniformMatrix4fv(GLint location,
                               GLsizei count,
                               GLboolean transpose,
                               const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix4fv(location, count, transpose, value);
}

void Context::validateProgram(GLuint program)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->validate(mCaps);
}

void Context::getProgramBinary(GLuint program,
                               GLsizei bufSize,
                               GLsizei *length,
                               GLenum *binaryFormat,
                               void *binary)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject != nullptr);

    handleError(programObject->saveBinary(this, binaryFormat, binary, bufSize, length));
}

void Context::programBinary(GLuint program, GLenum binaryFormat, const void *binary, GLsizei length)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject != nullptr);

    handleError(programObject->loadBinary(this, binaryFormat, binary, length));
}

void Context::uniform1ui(GLint location, GLuint v0)
{
    Program *program = mGLState.getProgram();
    program->setUniform1uiv(location, 1, &v0);
}

void Context::uniform2ui(GLint location, GLuint v0, GLuint v1)
{
    Program *program  = mGLState.getProgram();
    const GLuint xy[] = {v0, v1};
    program->setUniform2uiv(location, 1, xy);
}

void Context::uniform3ui(GLint location, GLuint v0, GLuint v1, GLuint v2)
{
    Program *program   = mGLState.getProgram();
    const GLuint xyz[] = {v0, v1, v2};
    program->setUniform3uiv(location, 1, xyz);
}

void Context::uniform4ui(GLint location, GLuint v0, GLuint v1, GLuint v2, GLuint v3)
{
    Program *program    = mGLState.getProgram();
    const GLuint xyzw[] = {v0, v1, v2, v3};
    program->setUniform4uiv(location, 1, xyzw);
}

void Context::uniform1uiv(GLint location, GLsizei count, const GLuint *value)
{
    Program *program = mGLState.getProgram();
    program->setUniform1uiv(location, count, value);
}
void Context::uniform2uiv(GLint location, GLsizei count, const GLuint *value)
{
    Program *program = mGLState.getProgram();
    program->setUniform2uiv(location, count, value);
}

void Context::uniform3uiv(GLint location, GLsizei count, const GLuint *value)
{
    Program *program = mGLState.getProgram();
    program->setUniform3uiv(location, count, value);
}

void Context::uniform4uiv(GLint location, GLsizei count, const GLuint *value)
{
    Program *program = mGLState.getProgram();
    program->setUniform4uiv(location, count, value);
}

void Context::genQueries(GLsizei n, GLuint *ids)
{
    for (GLsizei i = 0; i < n; i++)
    {
        GLuint handle = mQueryHandleAllocator.allocate();
        mQueryMap.assign(handle, nullptr);
        ids[i] = handle;
    }
}

void Context::deleteQueries(GLsizei n, const GLuint *ids)
{
    for (int i = 0; i < n; i++)
    {
        GLuint query = ids[i];

        Query *queryObject = nullptr;
        if (mQueryMap.erase(query, &queryObject))
        {
            mQueryHandleAllocator.release(query);
            if (queryObject)
            {
                queryObject->release(this);
            }
        }
    }
}

GLboolean Context::isQuery(GLuint id)
{
    return (getQuery(id, false, GL_NONE) != nullptr) ? GL_TRUE : GL_FALSE;
}

void Context::uniformMatrix2x3fv(GLint location,
                                 GLsizei count,
                                 GLboolean transpose,
                                 const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix2x3fv(location, count, transpose, value);
}

void Context::uniformMatrix3x2fv(GLint location,
                                 GLsizei count,
                                 GLboolean transpose,
                                 const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix3x2fv(location, count, transpose, value);
}

void Context::uniformMatrix2x4fv(GLint location,
                                 GLsizei count,
                                 GLboolean transpose,
                                 const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix2x4fv(location, count, transpose, value);
}

void Context::uniformMatrix4x2fv(GLint location,
                                 GLsizei count,
                                 GLboolean transpose,
                                 const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix4x2fv(location, count, transpose, value);
}

void Context::uniformMatrix3x4fv(GLint location,
                                 GLsizei count,
                                 GLboolean transpose,
                                 const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix3x4fv(location, count, transpose, value);
}

void Context::uniformMatrix4x3fv(GLint location,
                                 GLsizei count,
                                 GLboolean transpose,
                                 const GLfloat *value)
{
    Program *program = mGLState.getProgram();
    program->setUniformMatrix4x3fv(location, count, transpose, value);
}

void Context::deleteVertexArrays(GLsizei n, const GLuint *arrays)
{
    for (int arrayIndex = 0; arrayIndex < n; arrayIndex++)
    {
        GLuint vertexArray = arrays[arrayIndex];

        if (arrays[arrayIndex] != 0)
        {
            VertexArray *vertexArrayObject = nullptr;
            if (mVertexArrayMap.erase(vertexArray, &vertexArrayObject))
            {
                if (vertexArrayObject != nullptr)
                {
                    detachVertexArray(vertexArray);
                    vertexArrayObject->onDestroy(this);
                }

                mVertexArrayHandleAllocator.release(vertexArray);
            }
        }
    }
}

void Context::genVertexArrays(GLsizei n, GLuint *arrays)
{
    for (int arrayIndex = 0; arrayIndex < n; arrayIndex++)
    {
        GLuint vertexArray = mVertexArrayHandleAllocator.allocate();
        mVertexArrayMap.assign(vertexArray, nullptr);
        arrays[arrayIndex] = vertexArray;
    }
}

bool Context::isVertexArray(GLuint array)
{
    if (array == 0)
    {
        return GL_FALSE;
    }

    VertexArray *vao = getVertexArray(array);
    return (vao != nullptr ? GL_TRUE : GL_FALSE);
}

void Context::endTransformFeedback()
{
    TransformFeedback *transformFeedback = mGLState.getCurrentTransformFeedback();
    transformFeedback->end(this);
}

void Context::transformFeedbackVaryings(GLuint program,
                                        GLsizei count,
                                        const GLchar *const *varyings,
                                        GLenum bufferMode)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->setTransformFeedbackVaryings(count, varyings, bufferMode);
}

void Context::getTransformFeedbackVarying(GLuint program,
                                          GLuint index,
                                          GLsizei bufSize,
                                          GLsizei *length,
                                          GLsizei *size,
                                          GLenum *type,
                                          GLchar *name)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    programObject->getTransformFeedbackVarying(index, bufSize, length, size, type, name);
}

void Context::deleteTransformFeedbacks(GLsizei n, const GLuint *ids)
{
    for (int i = 0; i < n; i++)
    {
        GLuint transformFeedback = ids[i];
        if (transformFeedback == 0)
        {
            continue;
        }

        TransformFeedback *transformFeedbackObject = nullptr;
        if (mTransformFeedbackMap.erase(transformFeedback, &transformFeedbackObject))
        {
            if (transformFeedbackObject != nullptr)
            {
                detachTransformFeedback(transformFeedback);
                transformFeedbackObject->release(this);
            }

            mTransformFeedbackHandleAllocator.release(transformFeedback);
        }
    }
}

void Context::genTransformFeedbacks(GLsizei n, GLuint *ids)
{
    for (int i = 0; i < n; i++)
    {
        GLuint transformFeedback = mTransformFeedbackHandleAllocator.allocate();
        mTransformFeedbackMap.assign(transformFeedback, nullptr);
        ids[i] = transformFeedback;
    }
}

bool Context::isTransformFeedback(GLuint id)
{
    if (id == 0)
    {
        // The 3.0.4 spec [section 6.1.11] states that if ID is zero, IsTransformFeedback
        // returns FALSE
        return GL_FALSE;
    }

    const TransformFeedback *transformFeedback = getTransformFeedback(id);
    return ((transformFeedback != nullptr) ? GL_TRUE : GL_FALSE);
}

void Context::pauseTransformFeedback()
{
    TransformFeedback *transformFeedback = mGLState.getCurrentTransformFeedback();
    transformFeedback->pause();
}

void Context::resumeTransformFeedback()
{
    TransformFeedback *transformFeedback = mGLState.getCurrentTransformFeedback();
    transformFeedback->resume();
}

void Context::getUniformuiv(GLuint program, GLint location, GLuint *params)
{
    const Program *programObject = getProgram(program);
    programObject->getUniformuiv(this, location, params);
}

GLint Context::getFragDataLocation(GLuint program, const GLchar *name)
{
    const Program *programObject = getProgram(program);
    return programObject->getFragDataLocation(name);
}

void Context::getUniformIndices(GLuint program,
                                GLsizei uniformCount,
                                const GLchar *const *uniformNames,
                                GLuint *uniformIndices)
{
    const Program *programObject = getProgram(program);
    if (!programObject->isLinked())
    {
        for (int uniformId = 0; uniformId < uniformCount; uniformId++)
        {
            uniformIndices[uniformId] = GL_INVALID_INDEX;
        }
    }
    else
    {
        for (int uniformId = 0; uniformId < uniformCount; uniformId++)
        {
            uniformIndices[uniformId] = programObject->getUniformIndex(uniformNames[uniformId]);
        }
    }
}

void Context::getActiveUniformsiv(GLuint program,
                                  GLsizei uniformCount,
                                  const GLuint *uniformIndices,
                                  GLenum pname,
                                  GLint *params)
{
    const Program *programObject = getProgram(program);
    for (int uniformId = 0; uniformId < uniformCount; uniformId++)
    {
        const GLuint index = uniformIndices[uniformId];
        params[uniformId]  = GetUniformResourceProperty(programObject, index, pname);
    }
}

GLuint Context::getUniformBlockIndex(GLuint program, const GLchar *uniformBlockName)
{
    const Program *programObject = getProgram(program);
    return programObject->getUniformBlockIndex(uniformBlockName);
}

void Context::getActiveUniformBlockiv(GLuint program,
                                      GLuint uniformBlockIndex,
                                      GLenum pname,
                                      GLint *params)
{
    const Program *programObject = getProgram(program);
    QueryActiveUniformBlockiv(programObject, uniformBlockIndex, pname, params);
}

void Context::getActiveUniformBlockName(GLuint program,
                                        GLuint uniformBlockIndex,
                                        GLsizei bufSize,
                                        GLsizei *length,
                                        GLchar *uniformBlockName)
{
    const Program *programObject = getProgram(program);
    programObject->getActiveUniformBlockName(uniformBlockIndex, bufSize, length, uniformBlockName);
}

void Context::uniformBlockBinding(GLuint program,
                                  GLuint uniformBlockIndex,
                                  GLuint uniformBlockBinding)
{
    Program *programObject = getProgram(program);
    programObject->bindUniformBlock(uniformBlockIndex, uniformBlockBinding);
}

GLsync Context::fenceSync(GLenum condition, GLbitfield flags)
{
    GLuint handle     = mState.mSyncs->createSync(mImplementation.get());
    GLsync syncHandle = reinterpret_cast<GLsync>(static_cast<uintptr_t>(handle));

    Sync *syncObject = getSync(syncHandle);
    Error error      = syncObject->set(condition, flags);
    if (error.isError())
    {
        deleteSync(syncHandle);
        handleError(error);
        return nullptr;
    }

    return syncHandle;
}

GLboolean Context::isSync(GLsync sync)
{
    return (getSync(sync) != nullptr);
}

GLenum Context::clientWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout)
{
    Sync *syncObject = getSync(sync);

    GLenum result = GL_WAIT_FAILED;
    handleError(syncObject->clientWait(flags, timeout, &result));
    return result;
}

void Context::waitSync(GLsync sync, GLbitfield flags, GLuint64 timeout)
{
    Sync *syncObject = getSync(sync);
    handleError(syncObject->serverWait(flags, timeout));
}

void Context::getInteger64v(GLenum pname, GLint64 *params)
{
    GLenum nativeType      = GL_NONE;
    unsigned int numParams = 0;
    getQueryParameterInfo(pname, &nativeType, &numParams);

    if (nativeType == GL_INT_64_ANGLEX)
    {
        getInteger64vImpl(pname, params);
    }
    else
    {
        CastStateValues(this, nativeType, pname, numParams, params);
    }
}

void Context::getBufferParameteri64v(GLenum target, GLenum pname, GLint64 *params)
{
    Buffer *buffer = mGLState.getTargetBuffer(target);
    QueryBufferParameteri64v(buffer, pname, params);
}

void Context::genSamplers(GLsizei count, GLuint *samplers)
{
    for (int i = 0; i < count; i++)
    {
        samplers[i] = mState.mSamplers->createSampler();
    }
}

void Context::deleteSamplers(GLsizei count, const GLuint *samplers)
{
    for (int i = 0; i < count; i++)
    {
        GLuint sampler = samplers[i];

        if (mState.mSamplers->getSampler(sampler))
        {
            detachSampler(sampler);
        }

        mState.mSamplers->deleteObject(this, sampler);
    }
}

void Context::getInternalformativ(GLenum target,
                                  GLenum internalformat,
                                  GLenum pname,
                                  GLsizei bufSize,
                                  GLint *params)
{
    const TextureCaps &formatCaps = mTextureCaps.get(internalformat);
    QueryInternalFormativ(formatCaps, pname, bufSize, params);
}

void Context::programUniform1iv(GLuint program, GLint location, GLsizei count, const GLint *value)
{
    Program *programObject = getProgram(program);
    ASSERT(programObject);
    if (programObject->setUniform1iv(location, count, value) ==
        Program::SetUniformResult::SamplerChanged)
    {
        mGLState.setObjectDirty(GL_PROGRAM);
    }
}

void Context::onTextureChange(const Texture *texture)
{
    // Conservatively assume all textures are dirty.
    // TODO(jmadill): More fine-grained update.
    mGLState.setObjectDirty(GL_TEXTURE);
}

void Context::genProgramPipelines(GLsizei count, GLuint *pipelines)
{
    for (int i = 0; i < count; i++)
    {
        pipelines[i] = createProgramPipeline();
    }
}

void Context::deleteProgramPipelines(GLsizei count, const GLuint *pipelines)
{
    for (int i = 0; i < count; i++)
    {
        if (pipelines[i] != 0)
        {
            deleteProgramPipeline(pipelines[i]);
        }
    }
}

GLboolean Context::isProgramPipeline(GLuint pipeline)
{
    if (pipeline == 0)
    {
        return GL_FALSE;
    }

    return (getProgramPipeline(pipeline) ? GL_TRUE : GL_FALSE);
}

}  // namespace gl
kc3-lang/angle/src/libANGLE/Context.cpp

Commit

kc3-lang/angle /src/libANGLE/Context.cpp
