Quelle  State.cpp   Sprache: C

//
// Copyright 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.
//

// State.cpp: Implements the State class, encapsulating raw GL state.

#include "libANGLE/State.h"

#include <string.h>
#include <limits>

#include "common/bitset_utils.h"
#include "common/mathutil.h"
#include "common/matrix_utils.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Caps.h"
#include "libANGLE/Context.h"
#include "libANGLE/Debug.h"
#include "libANGLE/Framebuffer.h"
#include "libANGLE/FramebufferAttachment.h"
#include "libANGLE/PixelLocalStorage.h"
#include "libANGLE/Query.h"
#include "libANGLE/VertexArray.h"
#include "libANGLE/formatutils.h"
#include "libANGLE/queryconversions.h"
#include "libANGLE/queryutils.h"
#include "libANGLE/renderer/ContextImpl.h"
#include "libANGLE/renderer/TextureImpl.h"

namespace gl
{

namespace
{
bool GetAlternativeQueryType(QueryType type, QueryType *alternativeType)
{
    switch (type)
    {
        case QueryType::AnySamples:
            *alternativeType = QueryType::AnySamplesConservative;
            return true;
        case QueryType::AnySamplesConservative:
            *alternativeType = QueryType::AnySamples;
            return true;
        default:
            return false;
    }
}

// Mapping from a buffer binding type to a dirty bit type.
constexpr angle::PackedEnumMap<BufferBinding, size_t> kBufferBindingDirtyBits = {{
    {BufferBinding::AtomicCounter, State::DIRTY_BIT_ATOMIC_COUNTER_BUFFER_BINDING},
    {BufferBinding::DispatchIndirect, State::DIRTY_BIT_DISPATCH_INDIRECT_BUFFER_BINDING},
    {BufferBinding::DrawIndirect, State::DIRTY_BIT_DRAW_INDIRECT_BUFFER_BINDING},
    {BufferBinding::PixelPack, State::DIRTY_BIT_PACK_BUFFER_BINDING},
    {BufferBinding::PixelUnpack, State::DIRTY_BIT_UNPACK_BUFFER_BINDING},
    {BufferBinding::ShaderStorage, State::DIRTY_BIT_SHADER_STORAGE_BUFFER_BINDING},
    {BufferBinding::Uniform, State::DIRTY_BIT_UNIFORM_BUFFER_BINDINGS},
}};

// Returns a buffer binding function depending on if a dirty bit is set.
template <BufferBinding Target>
constexpr std::pair<BufferBinding, State::BufferBindingSetter> GetBufferBindingSetter()
{
    return std::make_pair(Target, kBufferBindingDirtyBits[Target] != 0
                                      ? &State::setGenericBufferBindingWithBit<Target>
                                      : &State::setGenericBufferBinding<Target>);
}

template <typename T>
using ContextStateMember = T *(State::*);

template <typename T>
T *AllocateOrGetSharedResourceManager(const State *shareContextState,
                                      ContextStateMember<T> member,
                                      T *shareResources = nullptr)
{
    if (shareContextState)
    {
        T *resourceManager = (*shareContextState).*member;
        ASSERT(!resourceManager || resourceManager == shareResources || !shareResources);
        resourceManager->addRef();
        return resourceManager;
    }
    else if (shareResources)
    {
        shareResources->addRef();
        return shareResources;
    }
    else
    {
        return new T();
    }
}

// TODO(https://anglebug.com/3889): Remove this helper function after blink and chromium part
// refactory done.
bool IsTextureCompatibleWithSampler(TextureType texture, TextureType sampler)
{
    if (sampler == texture)
    {
        return true;
    }

    if (sampler == TextureType::VideoImage)
    {
        if (texture == TextureType::VideoImage || texture == TextureType::_2D)
        {
            return true;
        }
    }

    return false;
}

uint32_t gIDCounter = 1;
}  // namespace

template <typename BindingT, typename... ArgsT>
ANGLE_INLINE void UpdateNonTFBufferBindingWebGL(const Context *context,
                                                BindingT *binding,
                                                Buffer *buffer,
                                                ArgsT... args)
{
    Buffer *oldBuffer = binding->get();
    if (oldBuffer)
    {
        oldBuffer->onNonTFBindingChanged(-1);
        oldBuffer->release(context);
    }
    binding->assign(buffer, args...);
    if (buffer)
    {
        buffer->addRef();
        buffer->onNonTFBindingChanged(1);
    }
}

template <typename BindingT, typename... ArgsT>
void UpdateTFBufferBindingWebGL(const Context *context,
                                BindingT *binding,
                                bool indexed,
                                ArgsT... args)
{
    if (binding->get())
        (*binding)->onTFBindingChanged(context, false, indexed);
    binding->set(context, args...);
    if (binding->get())
        (*binding)->onTFBindingChanged(context, true, indexed);
}

void UpdateBufferBinding(const Context *context,
                         BindingPointer<Buffer> *binding,
                         Buffer *buffer,
                         BufferBinding target)
{
    if (context->isWebGL())
    {
        if (target == BufferBinding::TransformFeedback)
        {
            UpdateTFBufferBindingWebGL(context, binding, false, buffer);
        }
        else
        {
            UpdateNonTFBufferBindingWebGL(context, binding, buffer);
        }
    }
    else
    {
        binding->set(context, buffer);
    }
}

void UpdateIndexedBufferBinding(const Context *context,
                                OffsetBindingPointer<Buffer> *binding,
                                Buffer *buffer,
                                BufferBinding target,
                                GLintptr offset,
                                GLsizeiptr size)
{
    if (context->isWebGL())
    {
        if (target == BufferBinding::TransformFeedback)
        {
            UpdateTFBufferBindingWebGL(context, binding, true, buffer, offset, size);
        }
        else
        {
            UpdateNonTFBufferBindingWebGL(context, binding, buffer, offset, size);
        }
    }
    else
    {
        binding->set(context, buffer, offset, size);
    }
}

// These template functions must be defined before they are instantiated in kBufferSetters.
template <BufferBinding Target>
void State::setGenericBufferBindingWithBit(const Context *context, Buffer *buffer)
{
    if (context->isWebGL())
    {
        UpdateNonTFBufferBindingWebGL(context, &mBoundBuffers[Target], buffer);
    }
    else
    {
        mBoundBuffers[Target].set(context, buffer);
    }
    mDirtyBits.set(kBufferBindingDirtyBits[Target]);
}

template <BufferBinding Target>
void State::setGenericBufferBinding(const Context *context, Buffer *buffer)
{
    if (context->isWebGL())
    {
        UpdateNonTFBufferBindingWebGL(context, &mBoundBuffers[Target], buffer);
    }
    else
    {
        mBoundBuffers[Target].set(context, buffer);
    }
}

template <>
void State::setGenericBufferBinding<BufferBinding::TransformFeedback>(const Context *context,
                                                                      Buffer *buffer)
{
    if (context->isWebGL())
    {
        UpdateTFBufferBindingWebGL(context, &mBoundBuffers[BufferBinding::TransformFeedback], false,
                                   buffer);
    }
    else
    {
        mBoundBuffers[BufferBinding::TransformFeedback].set(context, buffer);
    }
}

template <>
void State::setGenericBufferBinding<BufferBinding::ElementArray>(const Context *context,
                                                                 Buffer *buffer)
{
    Buffer *oldBuffer = mVertexArray->mState.mElementArrayBuffer.get();
    if (oldBuffer)
    {
        oldBuffer->removeObserver(&mVertexArray->mState.mElementArrayBuffer);
        oldBuffer->removeContentsObserver(mVertexArray, kElementArrayBufferIndex);
        if (context->isWebGL())
        {
            oldBuffer->onNonTFBindingChanged(-1);
        }
        oldBuffer->release(context);
    }
    mVertexArray->mState.mElementArrayBuffer.assign(buffer);
    if (buffer)
    {
        buffer->addObserver(&mVertexArray->mState.mElementArrayBuffer);
        buffer->addContentsObserver(mVertexArray, kElementArrayBufferIndex);
        if (context->isWebGL())
        {
            buffer->onNonTFBindingChanged(1);
        }
        buffer->addRef();
    }
    mVertexArray->mDirtyBits.set(VertexArray::DIRTY_BIT_ELEMENT_ARRAY_BUFFER);
    mVertexArray->mIndexRangeCache.invalidate();
    mDirtyObjects.set(DIRTY_OBJECT_VERTEX_ARRAY);
}

const angle::PackedEnumMap<BufferBinding, State::BufferBindingSetter> State::kBufferSetters = {{
    GetBufferBindingSetter<BufferBinding::Array>(),
    GetBufferBindingSetter<BufferBinding::AtomicCounter>(),
    GetBufferBindingSetter<BufferBinding::CopyRead>(),
    GetBufferBindingSetter<BufferBinding::CopyWrite>(),
    GetBufferBindingSetter<BufferBinding::DispatchIndirect>(),
    GetBufferBindingSetter<BufferBinding::DrawIndirect>(),
    GetBufferBindingSetter<BufferBinding::ElementArray>(),
    GetBufferBindingSetter<BufferBinding::PixelPack>(),
    GetBufferBindingSetter<BufferBinding::PixelUnpack>(),
    GetBufferBindingSetter<BufferBinding::ShaderStorage>(),
    GetBufferBindingSetter<BufferBinding::Texture>(),
    GetBufferBindingSetter<BufferBinding::TransformFeedback>(),
    GetBufferBindingSetter<BufferBinding::Uniform>(),
}};

ActiveTexturesCache::ActiveTexturesCache() : mTextures{} {}

ActiveTexturesCache::~ActiveTexturesCache()
{
    ASSERT(empty());
}

void ActiveTexturesCache::clear()
{
    for (size_t textureIndex = 0; textureIndex < mTextures.size(); ++textureIndex)
    {
        reset(textureIndex);
    }
}

bool ActiveTexturesCache::empty() const
{
    for (Texture *texture : mTextures)
    {
        if (texture)
        {
            return false;
        }
    }

    return true;
}

ANGLE_INLINE void ActiveTexturesCache::reset(size_t textureIndex)
{
    if (mTextures[textureIndex])
    {
        mTextures[textureIndex] = nullptr;
    }
}

ANGLE_INLINE void ActiveTexturesCache::set(size_t textureIndex, Texture *texture)
{
    ASSERT(texture);
    mTextures[textureIndex] = texture;
}

State::State(const State *shareContextState,
             egl::ShareGroup *shareGroup,
             TextureManager *shareTextures,
             SemaphoreManager *shareSemaphores,
             const OverlayType *overlay,
             const EGLenum clientType,
             const Version &clientVersion,
             EGLint profileMask,
             bool debug,
             bool bindGeneratesResourceCHROMIUM,
             bool clientArraysEnabled,
             bool robustResourceInit,
             bool programBinaryCacheEnabled,
             EGLenum contextPriority,
             bool hasRobustAccess,
             bool hasProtectedContent)
    : mID({gIDCounter++}),
      mClientType(clientType),
      mProfileMask(profileMask),
      mContextPriority(contextPriority),
      mHasRobustAccess(hasRobustAccess),
      mHasProtectedContent(hasProtectedContent),
      mIsDebugContext(debug),
      mClientVersion(clientVersion),
      mShareGroup(shareGroup),
      mBufferManager(AllocateOrGetSharedResourceManager(shareContextState, &State::mBufferManager)),
      mShaderProgramManager(
          AllocateOrGetSharedResourceManager(shareContextState, &State::mShaderProgramManager)),
      mTextureManager(AllocateOrGetSharedResourceManager(shareContextState,
                                                         &State::mTextureManager,
                                                         shareTextures)),
      mRenderbufferManager(
          AllocateOrGetSharedResourceManager(shareContextState, &State::mRenderbufferManager)),
      mSamplerManager(
          AllocateOrGetSharedResourceManager(shareContextState, &State::mSamplerManager)),
      mSyncManager(AllocateOrGetSharedResourceManager(shareContextState, &State::mSyncManager)),
      mFramebufferManager(new FramebufferManager()),
      mProgramPipelineManager(new ProgramPipelineManager()),
      mMemoryObjectManager(
          AllocateOrGetSharedResourceManager(shareContextState, &State::mMemoryObjectManager)),
      mSemaphoreManager(AllocateOrGetSharedResourceManager(shareContextState,
                                                           &State::mSemaphoreManager,
                                                           shareSemaphores)),
      mDepthClearValue(0),
      mStencilClearValue(0),
      mScissorTest(false),
      mSampleAlphaToCoverage(false),
      mSampleCoverage(false),
      mSampleCoverageValue(0),
      mSampleCoverageInvert(false),
      mSampleMask(false),
      mMaxSampleMaskWords(0),
      mIsSampleShadingEnabled(false),
      mMinSampleShading(0.0f),
      mStencilRef(0),
      mStencilBackRef(0),
      mLineWidth(0),
      mGenerateMipmapHint(GL_NONE),
      mTextureFilteringHint(GL_NONE),
      mFragmentShaderDerivativeHint(GL_NONE),
      mBindGeneratesResource(bindGeneratesResourceCHROMIUM),
      mClientArraysEnabled(clientArraysEnabled),
      mNearZ(0),
      mFarZ(0),
      mReadFramebuffer(nullptr),
      mDrawFramebuffer(nullptr),
      mProgram(nullptr),
      mExecutable(nullptr),
      mProvokingVertex(gl::ProvokingVertexConvention::LastVertexConvention),
      mVertexArray(nullptr),
      mActiveSampler(0),
      mPrimitiveRestart(false),
      mDebug(debug),
      mMultiSampling(false),
      mSampleAlphaToOne(false),
      mFramebufferSRGB(true),
      mRobustResourceInit(robustResourceInit),
      mProgramBinaryCacheEnabled(programBinaryCacheEnabled),
      mTextureRectangleEnabled(true),
      mLogicOpEnabled(false),
      mLogicOp(LogicalOperation::Copy),
      mMaxShaderCompilerThreads(std::numeric_limits<GLuint>::max()),
      mPatchVertices(3),
      mPixelLocalStorageActive(false),
      mOverlay(overlay),
      mNoSimultaneousConstantColorAndAlphaBlendFunc(false),
      mSetBlendIndexedInvoked(false),
      mSetBlendFactorsIndexedInvoked(false),
      mSetBlendEquationsIndexedInvoked(false),
      mDisplayTextureShareGroup(shareTextures != nullptr),
      mBoundingBoxMinX(-1.0f),
      mBoundingBoxMinY(-1.0f),
      mBoundingBoxMinZ(-1.0f),
      mBoundingBoxMinW(1.0f),
      mBoundingBoxMaxX(1.0f),
      mBoundingBoxMaxY(1.0f),
      mBoundingBoxMaxZ(1.0f),
      mBoundingBoxMaxW(1.0f),
      mShadingRatePreserveAspectRatio(false),
      mShadingRate(ShadingRate::Undefined)
{}

State::~State() {}

void State::initialize(Context *context)
{
    const Extensions &nativeExtensions = context->getImplementation()->getNativeExtensions();
    const Version &clientVersion       = context->getClientVersion();

    mBlendStateExt = BlendStateExt(mCaps.maxDrawBuffers);

    setColorClearValue(0.0f, 0.0f, 0.0f, 0.0f);

    mDepthClearValue   = 1.0f;
    mStencilClearValue = 0;

    mScissorTest    = false;
    mScissor.x      = 0;
    mScissor.y      = 0;
    mScissor.width  = 0;
    mScissor.height = 0;

    mBlendColor.red   = 0;
    mBlendColor.green = 0;
    mBlendColor.blue  = 0;
    mBlendColor.alpha = 0;

    mStencilRef     = 0;
    mStencilBackRef = 0;

    mSampleCoverage       = false;
    mSampleCoverageValue  = 1.0f;
    mSampleCoverageInvert = false;

    mMaxSampleMaskWords = static_cast<GLuint>(mCaps.maxSampleMaskWords);
    mSampleMask         = false;
    mSampleMaskValues.fill(~GLbitfield(0));

    mGenerateMipmapHint           = GL_DONT_CARE;
    mTextureFilteringHint         = GL_DONT_CARE;
    mFragmentShaderDerivativeHint = GL_DONT_CARE;

    mLineWidth = 1.0f;

    mViewport.x      = 0;
    mViewport.y      = 0;
    mViewport.width  = 0;
    mViewport.height = 0;
    mNearZ           = 0.0f;
    mFarZ            = 1.0f;

    mClipControlOrigin = GL_LOWER_LEFT_EXT;
    mClipControlDepth  = GL_NEGATIVE_ONE_TO_ONE_EXT;

    mActiveSampler = 0;

    mVertexAttribCurrentValues.resize(mCaps.maxVertexAttributes);

    // Set all indexes in state attributes type mask to float (default)
    for (int i = 0; i < MAX_VERTEX_ATTRIBS; i++)
    {
        SetComponentTypeMask(ComponentType::Float, i, &mCurrentValuesTypeMask);
    }

    mUniformBuffers.resize(mCaps.maxUniformBufferBindings);

    mSamplerTextures[TextureType::_2D].resize(mCaps.maxCombinedTextureImageUnits);
    mSamplerTextures[TextureType::CubeMap].resize(mCaps.maxCombinedTextureImageUnits);
    if (clientVersion >= Version(3, 0) || nativeExtensions.texture3DOES)
    {
        mSamplerTextures[TextureType::_3D].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (clientVersion >= Version(3, 0))
    {
        mSamplerTextures[TextureType::_2DArray].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (clientVersion >= Version(3, 1) || nativeExtensions.textureMultisampleANGLE)
    {
        mSamplerTextures[TextureType::_2DMultisample].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (clientVersion >= Version(3, 1))
    {
        mSamplerTextures[TextureType::_2DMultisampleArray].resize(
            mCaps.maxCombinedTextureImageUnits);

        mAtomicCounterBuffers.resize(mCaps.maxAtomicCounterBufferBindings);
        mShaderStorageBuffers.resize(mCaps.maxShaderStorageBufferBindings);
    }
    if (clientVersion >= Version(3, 1) ||
        (mExtensions.shaderPixelLocalStorageANGLE &&
         ShPixelLocalStorageTypeUsesImages(
             context->getImplementation()->getNativePixelLocalStorageType())))
    {
        mImageUnits.resize(mCaps.maxImageUnits);
    }
    if (clientVersion >= Version(3, 2) || mExtensions.textureCubeMapArrayAny())
    {
        mSamplerTextures[TextureType::CubeMapArray].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (clientVersion >= Version(3, 2) || mExtensions.textureBufferAny())
    {
        mSamplerTextures[TextureType::Buffer].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (nativeExtensions.textureRectangleANGLE)
    {
        mSamplerTextures[TextureType::Rectangle].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (nativeExtensions.EGLImageExternalOES || nativeExtensions.EGLStreamConsumerExternalNV)
    {
        mSamplerTextures[TextureType::External].resize(mCaps.maxCombinedTextureImageUnits);
    }
    if (nativeExtensions.videoTextureWEBGL)
    {
        mSamplerTextures[TextureType::VideoImage].resize(mCaps.maxCombinedTextureImageUnits);
    }
    mCompleteTextureBindings.reserve(mCaps.maxCombinedTextureImageUnits);
    for (int32_t textureIndex = 0; textureIndex < mCaps.maxCombinedTextureImageUnits;
         ++textureIndex)
    {
        mCompleteTextureBindings.emplace_back(context, textureIndex);
    }

    mSamplers.resize(mCaps.maxCombinedTextureImageUnits);

    for (QueryType type : angle::AllEnums<QueryType>())
    {
        mActiveQueries[type].set(context, nullptr);
    }

    mProgram    = nullptr;
    mExecutable = nullptr;

    mReadFramebuffer = nullptr;
    mDrawFramebuffer = nullptr;

    mPrimitiveRestart = false;

    mDebug.setMaxLoggedMessages(mCaps.maxDebugLoggedMessages);

    mMultiSampling    = true;
    mSampleAlphaToOne = false;

    mCoverageModulation = GL_NONE;

    mNoSimultaneousConstantColorAndAlphaBlendFunc =
        context->getLimitations().noSimultaneousConstantColorAndAlphaBlendFunc ||
        context->getExtensions().webglCompatibilityANGLE;

    mNoUnclampedBlendColor = context->getLimitations().noUnclampedBlendColor;

    // GLES1 emulation: Initialize state for GLES1 if version applies
    // TODO(http://anglebug.com/3745): When on desktop client only do this in compatibility profile
    if (clientVersion < Version(2, 0) || mClientType == EGL_OPENGL_API)
    {
        mGLES1State.initialize(context, this);
    }
}

void State::reset(const Context *context)
{
    // Force a sync so clear doesn't end up dereferencing stale pointers.
    (void)syncActiveTextures(context, Command::Other);
    mActiveTexturesCache.clear();

    for (TextureBindingVector &bindingVec : mSamplerTextures)
    {
        for (BindingPointer<Texture> &texBinding : bindingVec)
        {
            texBinding.set(context, nullptr);
        }
    }
    for (size_t samplerIdx = 0; samplerIdx < mSamplers.size(); samplerIdx++)
    {
        mSamplers[samplerIdx].set(context, nullptr);
    }

    for (ImageUnit &imageUnit : mImageUnits)
    {
        imageUnit.texture.set(context, nullptr);
        imageUnit.level   = 0;
        imageUnit.layered = false;
        imageUnit.layer   = 0;
        imageUnit.access  = GL_READ_ONLY;
        imageUnit.format  = GL_R32UI;
    }

    mRenderbuffer.set(context, nullptr);

    for (BufferBinding type : angle::AllEnums<BufferBinding>())
    {
        UpdateBufferBinding(context, &mBoundBuffers[type], nullptr, type);
    }

    if (mProgram)
    {
        mProgram->release(context);
    }
    mProgram = nullptr;
    mProgramPipeline.set(context, nullptr);
    mExecutable = nullptr;

    if (mTransformFeedback.get())
    {
        mTransformFeedback->onBindingChanged(context, false);
    }
    mTransformFeedback.set(context, nullptr);

    for (QueryType type : angle::AllEnums<QueryType>())
    {
        mActiveQueries[type].set(context, nullptr);
    }

    for (OffsetBindingPointer<Buffer> &buf : mUniformBuffers)
    {
        UpdateIndexedBufferBinding(context, &buf, nullptr, BufferBinding::Uniform, 0, 0);
    }
    mBoundUniformBuffersMask.reset();

    for (OffsetBindingPointer<Buffer> &buf : mAtomicCounterBuffers)
    {
        UpdateIndexedBufferBinding(context, &buf, nullptr, BufferBinding::AtomicCounter, 0, 0);
    }
    mBoundAtomicCounterBuffersMask.reset();

    for (OffsetBindingPointer<Buffer> &buf : mShaderStorageBuffers)
    {
        UpdateIndexedBufferBinding(context, &buf, nullptr, BufferBinding::ShaderStorage, 0, 0);
    }
    mBoundShaderStorageBuffersMask.reset();

    mClipDistancesEnabled.reset();

    setAllDirtyBits();
}

ANGLE_INLINE void State::unsetActiveTextures(const ActiveTextureMask &textureMask)
{
    // Unset any relevant bound textures.
    for (size_t textureIndex : textureMask)
    {
        mActiveTexturesCache.reset(textureIndex);
        mCompleteTextureBindings[textureIndex].reset();
    }
}

ANGLE_INLINE void State::updateActiveTextureStateOnSync(const Context *context,
                                                        size_t textureIndex,
                                                        const Sampler *sampler,
                                                        Texture *texture)
{
    if (!texture || !texture->isSamplerComplete(context, sampler))
    {
        mActiveTexturesCache.reset(textureIndex);
    }
    else
    {
        mActiveTexturesCache.set(textureIndex, texture);
    }

    mDirtyBits.set(DIRTY_BIT_TEXTURE_BINDINGS);
}

ANGLE_INLINE void State::setActiveTextureDirty(size_t textureIndex, Texture *texture)
{
    mDirtyObjects.set(DIRTY_OBJECT_ACTIVE_TEXTURES);
    mDirtyActiveTextures.set(textureIndex);

    if (!texture)
    {
        return;
    }

    if (texture->hasAnyDirtyBit())
    {
        setTextureDirty(textureIndex);
    }

    if (mRobustResourceInit && texture->initState() == InitState::MayNeedInit)
    {
        mDirtyObjects.set(DIRTY_OBJECT_TEXTURES_INIT);
    }

    // This cache is updated immediately because we use the cache in the validation layer.
    // If we defer the update until syncState it's too late and we've already passed validation.
    if (texture && mExecutable)
    {
        // It is invalid to try to sample a non-yuv texture with a yuv sampler.
        mTexturesIncompatibleWithSamplers[textureIndex] =
            mExecutable->getActiveYUVSamplers().test(textureIndex) && !texture->isYUV();

        if (isWebGL())
        {
            const Sampler *sampler = mSamplers[textureIndex].get();
            const SamplerState &samplerState =
                sampler ? sampler->getSamplerState() : texture->getSamplerState();
            if (!texture->getTextureState().compatibleWithSamplerFormatForWebGL(
                    mExecutable->getSamplerFormatForTextureUnitIndex(textureIndex), samplerState))
            {
                mTexturesIncompatibleWithSamplers[textureIndex] = true;
            }
        }
    }
    else
    {
        mTexturesIncompatibleWithSamplers[textureIndex] = false;
    }
}

ANGLE_INLINE void State::updateTextureBinding(const Context *context,
                                              size_t textureIndex,
                                              Texture *texture)
{
    mCompleteTextureBindings[textureIndex].bind(texture);
    mActiveTexturesCache.reset(textureIndex);
    setActiveTextureDirty(textureIndex, texture);
}

ANGLE_INLINE bool State::hasConstantColor(GLenum sourceRGB, GLenum destRGB) const
{
    return sourceRGB == GL_CONSTANT_COLOR || sourceRGB == GL_ONE_MINUS_CONSTANT_COLOR ||
           destRGB == GL_CONSTANT_COLOR || destRGB == GL_ONE_MINUS_CONSTANT_COLOR;
}

ANGLE_INLINE bool State::hasConstantAlpha(GLenum sourceRGB, GLenum destRGB) const
{
    return sourceRGB == GL_CONSTANT_ALPHA || sourceRGB == GL_ONE_MINUS_CONSTANT_ALPHA ||
           destRGB == GL_CONSTANT_ALPHA || destRGB == GL_ONE_MINUS_CONSTANT_ALPHA;
}

const RasterizerState &State::getRasterizerState() const
{
    return mRasterizer;
}

const DepthStencilState &State::getDepthStencilState() const
{
    return mDepthStencil;
}

void State::setColorClearValue(float red, float green, float blue, float alpha)
{
    mColorClearValue.red   = red;
    mColorClearValue.green = green;
    mColorClearValue.blue  = blue;
    mColorClearValue.alpha = alpha;
    mDirtyBits.set(DIRTY_BIT_CLEAR_COLOR);
}

void State::setDepthClearValue(float depth)
{
    mDepthClearValue = depth;
    mDirtyBits.set(DIRTY_BIT_CLEAR_DEPTH);
}

void State::setStencilClearValue(int stencil)
{
    mStencilClearValue = stencil;
    mDirtyBits.set(DIRTY_BIT_CLEAR_STENCIL);
}

void State::setColorMask(bool red, bool green, bool blue, bool alpha)
{
    mBlendState.colorMaskRed   = red;
    mBlendState.colorMaskGreen = green;
    mBlendState.colorMaskBlue  = blue;
    mBlendState.colorMaskAlpha = alpha;

    mBlendStateExt.setColorMask(red, green, blue, alpha);
    mDirtyBits.set(DIRTY_BIT_COLOR_MASK);
}

void State::setColorMaskIndexed(bool red, bool green, bool blue, bool alpha, GLuint index)
{
    mBlendStateExt.setColorMaskIndexed(index, red, green, blue, alpha);
    mDirtyBits.set(DIRTY_BIT_COLOR_MASK);
}

bool State::allActiveDrawBufferChannelsMasked() const
{
    // Compare current color mask with all-disabled color mask, while ignoring disabled draw
    // buffers.
    return (mBlendStateExt.compareColorMask(0) & mDrawFramebuffer->getDrawBufferMask()).none();
}

bool State::anyActiveDrawBufferChannelMasked() const
{
    // Compare current color mask with all-enabled color mask, while ignoring disabled draw
    // buffers.
    return (mBlendStateExt.compareColorMask(mBlendStateExt.getAllColorMaskBits()) &
            mDrawFramebuffer->getDrawBufferMask())
        .any();
}

void State::setDepthMask(bool mask)
{
    if (mDepthStencil.depthMask != mask)
    {
        mDepthStencil.depthMask = mask;
        mDirtyBits.set(DIRTY_BIT_DEPTH_MASK);
    }
}

void State::setRasterizerDiscard(bool enabled)
{
    if (mRasterizer.rasterizerDiscard != enabled)
    {
        mRasterizer.rasterizerDiscard = enabled;
        mDirtyBits.set(DIRTY_BIT_RASTERIZER_DISCARD_ENABLED);
    }
}

void State::setCullFace(bool enabled)
{
    if (mRasterizer.cullFace != enabled)
    {
        mRasterizer.cullFace = enabled;
        mDirtyBits.set(DIRTY_BIT_CULL_FACE_ENABLED);
    }
}

void State::setCullMode(CullFaceMode mode)
{
    if (mRasterizer.cullMode != mode)
    {
        mRasterizer.cullMode = mode;
        mDirtyBits.set(DIRTY_BIT_CULL_FACE);
    }
}

void State::setFrontFace(GLenum front)
{
    if (mRasterizer.frontFace != front)
    {
        mRasterizer.frontFace = front;
        mDirtyBits.set(DIRTY_BIT_FRONT_FACE);
    }
}

void State::setDepthTest(bool enabled)
{
    if (mDepthStencil.depthTest != enabled)
    {
        mDepthStencil.depthTest = enabled;
        mDirtyBits.set(DIRTY_BIT_DEPTH_TEST_ENABLED);
    }
}

void State::setDepthFunc(GLenum depthFunc)
{
    if (mDepthStencil.depthFunc != depthFunc)
    {
        mDepthStencil.depthFunc = depthFunc;
        mDirtyBits.set(DIRTY_BIT_DEPTH_FUNC);
    }
}

void State::setDepthRange(float zNear, float zFar)
{
    if (mNearZ != zNear || mFarZ != zFar)
    {
        mNearZ = zNear;
        mFarZ  = zFar;
        mDirtyBits.set(DIRTY_BIT_DEPTH_RANGE);
    }
}

void State::setClipControl(GLenum origin, GLenum depth)
{
    bool updated = false;
    if (mClipControlOrigin != origin)
    {
        mClipControlOrigin = origin;
        updated            = true;
    }

    if (mClipControlDepth != depth)
    {
        mClipControlDepth = depth;
        updated           = true;
    }

    if (updated)
    {
        mDirtyBits.set(DIRTY_BIT_EXTENDED);
        mExtendedDirtyBits.set(EXTENDED_DIRTY_BIT_CLIP_CONTROL);
    }
}

void State::setBlend(bool enabled)
{
    if (mSetBlendIndexedInvoked || mBlendState.blend != enabled)
    {
        mBlendState.blend = enabled;

        mSetBlendIndexedInvoked = false;
        mBlendStateExt.setEnabled(enabled);
        mDirtyBits.set(DIRTY_BIT_BLEND_ENABLED);
    }
}

void State::setBlendIndexed(bool enabled, GLuint index)
{
    mSetBlendIndexedInvoked = true;
    mBlendStateExt.setEnabledIndexed(index, enabled);
    mDirtyBits.set(DIRTY_BIT_BLEND_ENABLED);
}

void State::setBlendFactors(GLenum sourceRGB, GLenum destRGB, GLenum sourceAlpha, GLenum destAlpha)
{
    if (!mSetBlendFactorsIndexedInvoked && mBlendState.sourceBlendRGB == sourceRGB &&
        mBlendState.destBlendRGB == destRGB && mBlendState.sourceBlendAlpha == sourceAlpha &&
        mBlendState.destBlendAlpha == destAlpha)
    {
        return;
    }

    mBlendState.sourceBlendRGB   = sourceRGB;
    mBlendState.destBlendRGB     = destRGB;
    mBlendState.sourceBlendAlpha = sourceAlpha;
    mBlendState.destBlendAlpha   = destAlpha;

    if (mNoSimultaneousConstantColorAndAlphaBlendFunc)
    {
        if (hasConstantColor(sourceRGB, destRGB))
        {
            mBlendFuncConstantColorDrawBuffers.set();
        }
        else
        {
            mBlendFuncConstantColorDrawBuffers.reset();
        }

        if (hasConstantAlpha(sourceRGB, destRGB))
        {
            mBlendFuncConstantAlphaDrawBuffers.set();
        }
        else
        {
            mBlendFuncConstantAlphaDrawBuffers.reset();
        }
    }

    mSetBlendFactorsIndexedInvoked = false;
    mBlendStateExt.setFactors(sourceRGB, destRGB, sourceAlpha, destAlpha);
    mDirtyBits.set(DIRTY_BIT_BLEND_FUNCS);
}

void State::setBlendFactorsIndexed(GLenum sourceRGB,
                                   GLenum destRGB,
                                   GLenum sourceAlpha,
                                   GLenum destAlpha,
                                   GLuint index)
{
    if (mNoSimultaneousConstantColorAndAlphaBlendFunc)
    {
        mBlendFuncConstantColorDrawBuffers.set(index, hasConstantColor(sourceRGB, destRGB));
        mBlendFuncConstantAlphaDrawBuffers.set(index, hasConstantAlpha(sourceRGB, destRGB));
    }

    mSetBlendFactorsIndexedInvoked = true;
    mBlendStateExt.setFactorsIndexed(index, sourceRGB, destRGB, sourceAlpha, destAlpha);
    mDirtyBits.set(DIRTY_BIT_BLEND_FUNCS);
}

void State::setBlendColor(float red, float green, float blue, float alpha)
{
    // In ES2 without render-to-float extensions, BlendColor clamps to [0,1] on store.
    // On ES3+, or with render-to-float exts enabled, it does not clamp on store.
    const bool isES2 = mClientVersion.major == 2;
    const bool hasFloatBlending =
        mExtensions.colorBufferFloatEXT || mExtensions.colorBufferHalfFloatEXT ||
        mExtensions.colorBufferFloatRgbCHROMIUM || mExtensions.colorBufferFloatRgbaCHROMIUM;
    if ((isES2 && !hasFloatBlending) || mNoUnclampedBlendColor)
    {
        red   = clamp01(red);
        green = clamp01(green);
        blue  = clamp01(blue);
        alpha = clamp01(alpha);
    }

    if (mBlendColor.red != red || mBlendColor.green != green || mBlendColor.blue != blue ||
        mBlendColor.alpha != alpha)
    {
        mBlendColor.red   = red;
        mBlendColor.green = green;
        mBlendColor.blue  = blue;
        mBlendColor.alpha = alpha;
        mDirtyBits.set(DIRTY_BIT_BLEND_COLOR);
    }
}

void State::setBlendEquation(GLenum rgbEquation, GLenum alphaEquation)
{
    if (mSetBlendEquationsIndexedInvoked || mBlendState.blendEquationRGB != rgbEquation ||
        mBlendState.blendEquationAlpha != alphaEquation)
    {
        mBlendState.blendEquationRGB   = rgbEquation;
        mBlendState.blendEquationAlpha = alphaEquation;

        mSetBlendEquationsIndexedInvoked = false;
        mBlendStateExt.setEquations(rgbEquation, alphaEquation);
        mDirtyBits.set(DIRTY_BIT_BLEND_EQUATIONS);
    }
}

void State::setBlendEquationIndexed(GLenum rgbEquation, GLenum alphaEquation, GLuint index)
{
    mSetBlendEquationsIndexedInvoked = true;
    mBlendStateExt.setEquationsIndexed(index, rgbEquation, alphaEquation);
    mDirtyBits.set(DIRTY_BIT_BLEND_EQUATIONS);
}

void State::setStencilTest(bool enabled)
{
    if (mDepthStencil.stencilTest != enabled)
    {
        mDepthStencil.stencilTest = enabled;
        mDirtyBits.set(DIRTY_BIT_STENCIL_TEST_ENABLED);
    }
}

void State::setStencilParams(GLenum stencilFunc, GLint stencilRef, GLuint stencilMask)
{
    if (mDepthStencil.stencilFunc != stencilFunc || mStencilRef != stencilRef ||
        mDepthStencil.stencilMask != stencilMask)
    {
        mDepthStencil.stencilFunc = stencilFunc;
        mStencilRef               = stencilRef;
        mDepthStencil.stencilMask = stencilMask;
        mDirtyBits.set(DIRTY_BIT_STENCIL_FUNCS_FRONT);
    }
}

void State::setStencilBackParams(GLenum stencilBackFunc,
                                 GLint stencilBackRef,
                                 GLuint stencilBackMask)
{
    if (mDepthStencil.stencilBackFunc != stencilBackFunc || mStencilBackRef != stencilBackRef ||
        mDepthStencil.stencilBackMask != stencilBackMask)
    {
        mDepthStencil.stencilBackFunc = stencilBackFunc;
        mStencilBackRef               = stencilBackRef;
        mDepthStencil.stencilBackMask = stencilBackMask;
        mDirtyBits.set(DIRTY_BIT_STENCIL_FUNCS_BACK);
    }
}

void State::setStencilWritemask(GLuint stencilWritemask)
{
    if (mDepthStencil.stencilWritemask != stencilWritemask)
    {
        mDepthStencil.stencilWritemask = stencilWritemask;
        mDirtyBits.set(DIRTY_BIT_STENCIL_WRITEMASK_FRONT);
    }
}

void State::setStencilBackWritemask(GLuint stencilBackWritemask)
{
    if (mDepthStencil.stencilBackWritemask != stencilBackWritemask)
    {
        mDepthStencil.stencilBackWritemask = stencilBackWritemask;
        mDirtyBits.set(DIRTY_BIT_STENCIL_WRITEMASK_BACK);
    }
}

void State::setStencilOperations(GLenum stencilFail,
                                 GLenum stencilPassDepthFail,
                                 GLenum stencilPassDepthPass)
{
    if (mDepthStencil.stencilFail != stencilFail ||
        mDepthStencil.stencilPassDepthFail != stencilPassDepthFail ||
        mDepthStencil.stencilPassDepthPass != stencilPassDepthPass)
    {
        mDepthStencil.stencilFail          = stencilFail;
        mDepthStencil.stencilPassDepthFail = stencilPassDepthFail;
        mDepthStencil.stencilPassDepthPass = stencilPassDepthPass;
        mDirtyBits.set(DIRTY_BIT_STENCIL_OPS_FRONT);
    }
}

void State::setStencilBackOperations(GLenum stencilBackFail,
                                     GLenum stencilBackPassDepthFail,
                                     GLenum stencilBackPassDepthPass)
{
    if (mDepthStencil.stencilBackFail != stencilBackFail ||
        mDepthStencil.stencilBackPassDepthFail != stencilBackPassDepthFail ||
        mDepthStencil.stencilBackPassDepthPass != stencilBackPassDepthPass)
    {
        mDepthStencil.stencilBackFail          = stencilBackFail;
        mDepthStencil.stencilBackPassDepthFail = stencilBackPassDepthFail;
        mDepthStencil.stencilBackPassDepthPass = stencilBackPassDepthPass;
        mDirtyBits.set(DIRTY_BIT_STENCIL_OPS_BACK);
    }
}

void State::setPolygonOffsetFill(bool enabled)
{
    if (mRasterizer.polygonOffsetFill != enabled)
    {
        mRasterizer.polygonOffsetFill = enabled;
        mDirtyBits.set(DIRTY_BIT_POLYGON_OFFSET_FILL_ENABLED);
    }
}

void State::setPolygonOffsetParams(GLfloat factor, GLfloat units)
{
    // An application can pass NaN values here, so handle this gracefully
    mRasterizer.polygonOffsetFactor = factor != factor ? 0.0f : factor;
    mRasterizer.polygonOffsetUnits  = units != units ? 0.0f : units;
    mDirtyBits.set(DIRTY_BIT_POLYGON_OFFSET);
}

void State::setSampleAlphaToCoverage(bool enabled)
{
    if (mSampleAlphaToCoverage != enabled)
    {
        mSampleAlphaToCoverage = enabled;
        mDirtyBits.set(DIRTY_BIT_SAMPLE_ALPHA_TO_COVERAGE_ENABLED);
    }
}

void State::setSampleCoverage(bool enabled)
{
    if (mSampleCoverage != enabled)
    {
        mSampleCoverage = enabled;
        mDirtyBits.set(DIRTY_BIT_SAMPLE_COVERAGE_ENABLED);
    }
}

void State::setSampleCoverageParams(GLclampf value, bool invert)
{
    mSampleCoverageValue  = value;
    mSampleCoverageInvert = invert;
    mDirtyBits.set(DIRTY_BIT_SAMPLE_COVERAGE);
}

void State::setSampleMaskEnabled(bool enabled)
{
    if (mSampleMask != enabled)
    {
        mSampleMask = enabled;
        mDirtyBits.set(DIRTY_BIT_SAMPLE_MASK_ENABLED);
    }
}

void State::setSampleMaskParams(GLuint maskNumber, GLbitfield mask)
{
    ASSERT(maskNumber < mMaxSampleMaskWords);
    mSampleMaskValues[maskNumber] = mask;
    // TODO(jmadill): Use a child dirty bit if we ever use more than two words.
    mDirtyBits.set(DIRTY_BIT_SAMPLE_MASK);
}

void State::setSampleAlphaToOne(bool enabled)
{
    if (mSampleAlphaToOne != enabled)
    {
        mSampleAlphaToOne = enabled;
        mDirtyBits.set(DIRTY_BIT_SAMPLE_ALPHA_TO_ONE);
    }
}

void State::setMultisampling(bool enabled)
{
    if (mMultiSampling != enabled)
    {
        mMultiSampling = enabled;
        mDirtyBits.set(DIRTY_BIT_MULTISAMPLING);
    }
}

void State::setSampleShading(bool enabled)
{
    if (mIsSampleShadingEnabled != enabled)
    {
        mIsSampleShadingEnabled = enabled;
        mMinSampleShading       = (enabled) ? 1.0f : mMinSampleShading;
        mDirtyBits.set(DIRTY_BIT_SAMPLE_SHADING);
    }
}

void State::setMinSampleShading(float value)
{
    value = gl::clamp01(value);

    if (mMinSampleShading != value)
    {
        mMinSampleShading = value;
        mDirtyBits.set(DIRTY_BIT_SAMPLE_SHADING);
    }
}

void State::setScissorTest(bool enabled)
{
    if (mScissorTest != enabled)
    {
        mScissorTest = enabled;
        mDirtyBits.set(DIRTY_BIT_SCISSOR_TEST_ENABLED);
    }
}

void State::setScissorParams(GLint x, GLint y, GLsizei width, GLsizei height)
{
    // Skip if same scissor info
    if (mScissor.x != x || mScissor.y != y || mScissor.width != width || mScissor.height != height)
    {
        mScissor.x      = x;
        mScissor.y      = y;
        mScissor.width  = width;
        mScissor.height = height;
        mDirtyBits.set(DIRTY_BIT_SCISSOR);
    }
}

void State::setDither(bool enabled)
{
    if (mRasterizer.dither != enabled)
    {
        mRasterizer.dither = enabled;
        mDirtyBits.set(DIRTY_BIT_DITHER_ENABLED);
    }
}

void State::setPrimitiveRestart(bool enabled)
{
    if (mPrimitiveRestart != enabled)
    {
        mPrimitiveRestart = enabled;
        mDirtyBits.set(DIRTY_BIT_PRIMITIVE_RESTART_ENABLED);
    }
}

void State::setClipDistanceEnable(int idx, bool enable)
{
    if (enable)
    {
        mClipDistancesEnabled.set(idx);
    }
    else
    {
        mClipDistancesEnabled.reset(idx);
    }

    mDirtyBits.set(DIRTY_BIT_EXTENDED);
    mExtendedDirtyBits.set(EXTENDED_DIRTY_BIT_CLIP_DISTANCES);
}

void State::setEnableFeature(GLenum feature, bool enabled)
{
    switch (feature)
    {
        case GL_MULTISAMPLE_EXT:
            setMultisampling(enabled);
            return;
        case GL_SAMPLE_ALPHA_TO_ONE_EXT:
            setSampleAlphaToOne(enabled);
            return;
        case GL_CULL_FACE:
            setCullFace(enabled);
            return;
        case GL_POLYGON_OFFSET_FILL:
            setPolygonOffsetFill(enabled);
            return;
        case GL_SAMPLE_ALPHA_TO_COVERAGE:
            setSampleAlphaToCoverage(enabled);
            return;
        case GL_SAMPLE_COVERAGE:
            setSampleCoverage(enabled);
            return;
        case GL_SCISSOR_TEST:
            setScissorTest(enabled);
            return;
        case GL_STENCIL_TEST:
            setStencilTest(enabled);
            return;
        case GL_DEPTH_TEST:
            setDepthTest(enabled);
            return;
        case GL_BLEND:
            setBlend(enabled);
            return;
        case GL_DITHER:
            setDither(enabled);
            return;
        case GL_COLOR_LOGIC_OP:
            if (mClientVersion.major == 1)
            {
                // Handle logicOp in GLES1 through the GLES1 state management and emulation.
                // Otherwise this state could be set as part of ANGLE_logic_op.
                break;
            }
            setLogicOpEnabled(enabled);
            return;
        case GL_PRIMITIVE_RESTART_FIXED_INDEX:
            setPrimitiveRestart(enabled);
            return;
        case GL_RASTERIZER_DISCARD:
            setRasterizerDiscard(enabled);
            return;
        case GL_SAMPLE_MASK:
            setSampleMaskEnabled(enabled);
            return;
        case GL_DEBUG_OUTPUT_SYNCHRONOUS:
            mDebug.setOutputSynchronous(enabled);
            return;
        case GL_DEBUG_OUTPUT:
            mDebug.setOutputEnabled(enabled);
            return;
        case GL_FRAMEBUFFER_SRGB_EXT:
            setFramebufferSRGB(enabled);
            return;
        case GL_TEXTURE_RECTANGLE_ANGLE:
            mTextureRectangleEnabled = enabled;
            return;
        case GL_SAMPLE_SHADING:
            setSampleShading(enabled);
            return;
        // GL_APPLE_clip_distance/GL_EXT_clip_cull_distance
        case GL_CLIP_DISTANCE0_EXT:
        case GL_CLIP_DISTANCE1_EXT:
        case GL_CLIP_DISTANCE2_EXT:
        case GL_CLIP_DISTANCE3_EXT:
        case GL_CLIP_DISTANCE4_EXT:
        case GL_CLIP_DISTANCE5_EXT:
        case GL_CLIP_DISTANCE6_EXT:
        case GL_CLIP_DISTANCE7_EXT:
            // NOTE(hqle): These enums are conflicted with GLES1's enums, need
            // to do additional check here:
            if (mClientVersion.major >= 2)
            {
                setClipDistanceEnable(feature - GL_CLIP_DISTANCE0_EXT, enabled);
                return;
            }
            break;
        case GL_SHADING_RATE_PRESERVE_ASPECT_RATIO_QCOM:
            mShadingRatePreserveAspectRatio = enabled;
            return;
    }

    ASSERT(mClientVersion.major == 1);

    // GLES1 emulation. Need to separate from main switch due to conflict enum between
    // GL_CLIP_DISTANCE0_EXT & GL_CLIP_PLANE0
    switch (feature)
    {
        case GL_ALPHA_TEST:
            mGLES1State.mAlphaTestEnabled = enabled;
            break;
        case GL_TEXTURE_2D:
            mGLES1State.mTexUnitEnables[mActiveSampler].set(TextureType::_2D, enabled);
            break;
        case GL_TEXTURE_CUBE_MAP:
            mGLES1State.mTexUnitEnables[mActiveSampler].set(TextureType::CubeMap, enabled);
            break;
        case GL_LIGHTING:
            mGLES1State.mLightingEnabled = enabled;
            break;
        case GL_LIGHT0:
        case GL_LIGHT1:
        case GL_LIGHT2:
        case GL_LIGHT3:
        case GL_LIGHT4:
        case GL_LIGHT5:
        case GL_LIGHT6:
        case GL_LIGHT7:
            mGLES1State.mLights[feature - GL_LIGHT0].enabled = enabled;
            break;
        case GL_NORMALIZE:
            mGLES1State.mNormalizeEnabled = enabled;
            break;
        case GL_RESCALE_NORMAL:
            mGLES1State.mRescaleNormalEnabled = enabled;
            break;
        case GL_COLOR_MATERIAL:
            mGLES1State.mColorMaterialEnabled = enabled;
            break;
        case GL_CLIP_PLANE0:
        case GL_CLIP_PLANE1:
        case GL_CLIP_PLANE2:
        case GL_CLIP_PLANE3:
        case GL_CLIP_PLANE4:
        case GL_CLIP_PLANE5:
            mGLES1State.mClipPlanes[feature - GL_CLIP_PLANE0].enabled = enabled;
            break;
        case GL_FOG:
            mGLES1State.mFogEnabled = enabled;
            break;
        case GL_POINT_SMOOTH:
            mGLES1State.mPointSmoothEnabled = enabled;
            break;
        case GL_LINE_SMOOTH:
            mGLES1State.mLineSmoothEnabled = enabled;
            break;
        case GL_POINT_SPRITE_OES:
            mGLES1State.mPointSpriteEnabled = enabled;
            break;
        case GL_COLOR_LOGIC_OP:
            mGLES1State.setLogicOpEnabled(enabled);
            break;
        default:
            UNREACHABLE();
    }
}

void State::setEnableFeatureIndexed(GLenum feature, bool enabled, GLuint index)
{
    switch (feature)
    {
        case GL_BLEND:
            setBlendIndexed(enabled, index);
            break;
        default:
            UNREACHABLE();
    }
}

bool State::getEnableFeature(GLenum feature) const
{
    switch (feature)
    {
        case GL_MULTISAMPLE_EXT:
            return isMultisamplingEnabled();
        case GL_SAMPLE_ALPHA_TO_ONE_EXT:
            return isSampleAlphaToOneEnabled();
        case GL_CULL_FACE:
            return isCullFaceEnabled();
        case GL_POLYGON_OFFSET_FILL:
            return isPolygonOffsetFillEnabled();
        case GL_SAMPLE_ALPHA_TO_COVERAGE:
            return isSampleAlphaToCoverageEnabled();
        case GL_SAMPLE_COVERAGE:
            return isSampleCoverageEnabled();
        case GL_SCISSOR_TEST:
            return isScissorTestEnabled();
        case GL_STENCIL_TEST:
            return isStencilTestEnabled();
        case GL_DEPTH_TEST:
            return isDepthTestEnabled();
        case GL_BLEND:
            return isBlendEnabled();
        case GL_DITHER:
            return isDitherEnabled();
        case GL_COLOR_LOGIC_OP:
            if (mClientVersion.major == 1)
            {
                // Handle logicOp in GLES1 through the GLES1 state management and emulation.
                break;
            }
            return isLogicOpEnabled();
        case GL_PRIMITIVE_RESTART_FIXED_INDEX:
            return isPrimitiveRestartEnabled();
        case GL_RASTERIZER_DISCARD:
            return isRasterizerDiscardEnabled();
        case GL_SAMPLE_MASK:
            return isSampleMaskEnabled();
        case GL_DEBUG_OUTPUT_SYNCHRONOUS:
            return mDebug.isOutputSynchronous();
        case GL_DEBUG_OUTPUT:
            return mDebug.isOutputEnabled();
        case GL_BIND_GENERATES_RESOURCE_CHROMIUM:
            return isBindGeneratesResourceEnabled();
        case GL_CLIENT_ARRAYS_ANGLE:
            return areClientArraysEnabled();
        case GL_FRAMEBUFFER_SRGB_EXT:
            return getFramebufferSRGB();
        case GL_ROBUST_RESOURCE_INITIALIZATION_ANGLE:
            return mRobustResourceInit;
        case GL_PROGRAM_CACHE_ENABLED_ANGLE:
            return mProgramBinaryCacheEnabled;
        case GL_TEXTURE_RECTANGLE_ANGLE:
            return mTextureRectangleEnabled;
        case GL_SAMPLE_SHADING:
            return isSampleShadingEnabled();
        // GL_APPLE_clip_distance/GL_EXT_clip_cull_distance
        case GL_CLIP_DISTANCE0_EXT:
        case GL_CLIP_DISTANCE1_EXT:
        case GL_CLIP_DISTANCE2_EXT:
        case GL_CLIP_DISTANCE3_EXT:
        case GL_CLIP_DISTANCE4_EXT:
        case GL_CLIP_DISTANCE5_EXT:
        case GL_CLIP_DISTANCE6_EXT:
        case GL_CLIP_DISTANCE7_EXT:
            if (mClientVersion.major >= 2)
            {
                // If GLES version is 1, the GL_CLIP_DISTANCE0_EXT enum will be used as
                // GL_CLIP_PLANE0 instead.
                return mClipDistancesEnabled.test(feature - GL_CLIP_DISTANCE0_EXT);
            }
            break;
        case GL_SHADING_RATE_PRESERVE_ASPECT_RATIO_QCOM:
            return mShadingRatePreserveAspectRatio;
    }

    ASSERT(mClientVersion.major == 1);

    switch (feature)
    {
        // GLES1 emulation
        case GL_ALPHA_TEST:
            return mGLES1State.mAlphaTestEnabled;
        case GL_VERTEX_ARRAY:
            return mGLES1State.mVertexArrayEnabled;
        case GL_NORMAL_ARRAY:
            return mGLES1State.mNormalArrayEnabled;
        case GL_COLOR_ARRAY:
            return mGLES1State.mColorArrayEnabled;
        case GL_POINT_SIZE_ARRAY_OES:
            return mGLES1State.mPointSizeArrayEnabled;
        case GL_TEXTURE_COORD_ARRAY:
            return mGLES1State.mTexCoordArrayEnabled[mGLES1State.mClientActiveTexture];
        case GL_TEXTURE_2D:
            return mGLES1State.isTextureTargetEnabled(getActiveSampler(), TextureType::_2D);
        case GL_TEXTURE_CUBE_MAP:
            return mGLES1State.isTextureTargetEnabled(getActiveSampler(), TextureType::CubeMap);
        case GL_LIGHTING:
            return mGLES1State.mLightingEnabled;
        case GL_LIGHT0:
        case GL_LIGHT1:
        case GL_LIGHT2:
        case GL_LIGHT3:
        case GL_LIGHT4:
        case GL_LIGHT5:
        case GL_LIGHT6:
        case GL_LIGHT7:
            return mGLES1State.mLights[feature - GL_LIGHT0].enabled;
        case GL_NORMALIZE:
            return mGLES1State.mNormalizeEnabled;
        case GL_RESCALE_NORMAL:
            return mGLES1State.mRescaleNormalEnabled;
        case GL_COLOR_MATERIAL:
            return mGLES1State.mColorMaterialEnabled;
        case GL_CLIP_PLANE0:
        case GL_CLIP_PLANE1:
        case GL_CLIP_PLANE2:
        case GL_CLIP_PLANE3:
        case GL_CLIP_PLANE4:
        case GL_CLIP_PLANE5:
            return mGLES1State.mClipPlanes[feature - GL_CLIP_PLANE0].enabled;
        case GL_FOG:
            return mGLES1State.mFogEnabled;
        case GL_POINT_SMOOTH:
            return mGLES1State.mPointSmoothEnabled;
        case GL_LINE_SMOOTH:
            return mGLES1State.mLineSmoothEnabled;
        case GL_POINT_SPRITE_OES:
            return mGLES1State.mPointSpriteEnabled;
        case GL_COLOR_LOGIC_OP:
            return mGLES1State.mLogicOpEnabled;
        default:
            UNREACHABLE();
            return false;
    }
}

bool State::getEnableFeatureIndexed(GLenum feature, GLuint index) const
{
    switch (feature)
    {
        case GL_BLEND:
            return isBlendEnabledIndexed(index);
        default:
            UNREACHABLE();
            return false;
    }
}

void State::setLineWidth(GLfloat width)
{
    mLineWidth = width;
    mDirtyBits.set(DIRTY_BIT_LINE_WIDTH);
}

void State::setGenerateMipmapHint(GLenum hint)
{
    mGenerateMipmapHint = hint;
    mDirtyBits.set(DIRTY_BIT_EXTENDED);
    mExtendedDirtyBits.set(EXTENDED_DIRTY_BIT_MIPMAP_GENERATION_HINT);
}

GLenum State::getGenerateMipmapHint() const
{
    return mGenerateMipmapHint;
}

void State::setTextureFilteringHint(GLenum hint)
{
    mTextureFilteringHint = hint;
    // Note: we don't add a dirty bit for this flag as it's not expected to be toggled at
    // runtime.
}

GLenum State::getTextureFilteringHint() const
{
    return mTextureFilteringHint;
}

void State::setFragmentShaderDerivativeHint(GLenum hint)
{
    mFragmentShaderDerivativeHint = hint;
    mDirtyBits.set(DIRTY_BIT_EXTENDED);
    mExtendedDirtyBits.set(EXTENDED_DIRTY_BIT_SHADER_DERIVATIVE_HINT);
    // TODO: Propagate the hint to shader translator so we can write
    // ddx, ddx_coarse, or ddx_fine depending on the hint.
    // Ignore for now. It is valid for implementations to ignore hint.
}

void State::setViewportParams(GLint x, GLint y, GLsizei width, GLsizei height)
{
    // [OpenGL ES 2.0.25] section 2.12.1 page 45:
    // Viewport width and height are clamped to implementation-dependent maximums when specified.
    width  = std::min(width, mCaps.maxViewportWidth);
    height = std::min(height, mCaps.maxViewportHeight);

    // Skip if same viewport info
    if (mViewport.x != x || mViewport.y != y || mViewport.width != width ||
        mViewport.height != height)
    {
        mViewport.x      = x;
        mViewport.y      = y;
        mViewport.width  = width;
        mViewport.height = height;
        mDirtyBits.set(DIRTY_BIT_VIEWPORT);
    }
}

void State::setActiveSampler(unsigned int active)
{
    mActiveSampler = active;
}

void State::setSamplerTexture(const Context *context, TextureType type, Texture *texture)
{
    if (mExecutable && mExecutable->getActiveSamplersMask()[mActiveSampler] &&
        IsTextureCompatibleWithSampler(type, mExecutable->getActiveSamplerTypes()[mActiveSampler]))
    {
        updateTextureBinding(context, mActiveSampler, texture);
    }

    mSamplerTextures[type][mActiveSampler].set(context, texture);

    mDirtyBits.set(DIRTY_BIT_TEXTURE_BINDINGS);
}

Texture *State::getTargetTexture(TextureType type) const
{
    return getSamplerTexture(static_cast<unsigned int>(mActiveSampler), type);
}

TextureID State::getSamplerTextureId(unsigned int sampler, TextureType type) const
{
    ASSERT(sampler < mSamplerTextures[type].size());
    return mSamplerTextures[type][sampler].id();
}

void State::detachTexture(const Context *context, const TextureMap &zeroTextures, TextureID texture)
{
    // Textures have a detach method on State rather than a simple
    // removeBinding, because the zero/null texture objects are managed
    // separately, and don't have to go through the Context's maps or
    // the ResourceManager.

    // [OpenGL ES 2.0.24] section 3.8 page 84:
    // If a texture object is deleted, it is as if all texture units which are bound to that texture
    // object are rebound to texture object zero

    for (TextureType type : angle::AllEnums<TextureType>())
    {
        TextureBindingVector &textureVector = mSamplerTextures[type];

        for (size_t bindingIndex = 0; bindingIndex < textureVector.size(); ++bindingIndex)
        {
            BindingPointer<Texture> &binding = textureVector[bindingIndex];
            if (binding.id() == texture)
            {
                // Zero textures are the "default" textures instead of NULL
                Texture *zeroTexture = zeroTextures[type].get();
                ASSERT(zeroTexture != nullptr);
                if (mCompleteTextureBindings[bindingIndex].getSubject() == binding.get())
                {
                    updateTextureBinding(context, bindingIndex, zeroTexture);
                }
                binding.set(context, zeroTexture);
            }
        }
    }

    for (auto &bindingImageUnit : mImageUnits)
    {
        if (bindingImageUnit.texture.id() == texture)
        {
            bindingImageUnit.texture.set(context, nullptr);
            bindingImageUnit.level   = 0;
            bindingImageUnit.layered = false;
            bindingImageUnit.layer   = 0;
            bindingImageUnit.access  = GL_READ_ONLY;
            bindingImageUnit.format  = GL_R32UI;
        }
    }

    // [OpenGL ES 2.0.24] section 4.4 page 112:
    // If a texture object is deleted while its image is attached to the currently bound
    // framebuffer, then it is as if Texture2DAttachment had been called, with a texture of 0, for
    // each attachment point to which this image was attached in the currently bound framebuffer.

    if (mReadFramebuffer && mReadFramebuffer->detachTexture(context, texture))
    {
        mDirtyObjects.set(DIRTY_OBJECT_READ_FRAMEBUFFER);
    }

    if (mDrawFramebuffer && mDrawFramebuffer->detachTexture(context, texture))
    {
        setDrawFramebufferDirty();
    }
}

void State::initializeZeroTextures(const Context *context, const TextureMap &zeroTextures)
{
    for (TextureType type : angle::AllEnums<TextureType>())
    {
        for (size_t textureUnit = 0; textureUnit < mSamplerTextures[type].size(); ++textureUnit)
        {
            mSamplerTextures[type][textureUnit].set(context, zeroTextures[type].get());
        }
    }
}

void State::invalidateTextureBindings(TextureType type)
{
    mDirtyBits.set(DIRTY_BIT_TEXTURE_BINDINGS);
}

void State::setSamplerBinding(const Context *context, GLuint textureUnit, Sampler *sampler)
{
    if (mSamplers[textureUnit].get() == sampler)
    {
        return;
    }

    mSamplers[textureUnit].set(context, sampler);
    mDirtyBits.set(DIRTY_BIT_SAMPLER_BINDINGS);
    // This is overly conservative as it assumes the sampler has never been bound.
    setSamplerDirty(textureUnit);
    onActiveTextureChange(context, textureUnit);
}

void State::detachSampler(const Context *context, SamplerID sampler)
{
    // [OpenGL ES 3.0.2] section 3.8.2 pages 123-124:
    // If a sampler object that is currently bound to one or more texture units is
    // deleted, it is as though BindSampler is called once for each texture unit to
    // which the sampler is bound, with unit set to the texture unit and sampler set to zero.
    for (size_t i = 0; i < mSamplers.size(); i++)
    {
        if (mSamplers[i].id() == sampler)
        {
            setSamplerBinding(context, static_cast<GLuint>(i), nullptr);
        }
    }
}

void State::setRenderbufferBinding(const Context *context, Renderbuffer *renderbuffer)
{
    mRenderbuffer.set(context, renderbuffer);
    mDirtyBits.set(DIRTY_BIT_RENDERBUFFER_BINDING);
}

void State::detachRenderbuffer(const Context *context, RenderbufferID renderbuffer)
{
    // [OpenGL ES 2.0.24] section 4.4 page 109:
    // If a renderbuffer that is currently bound to RENDERBUFFER is deleted, it is as though
    // BindRenderbuffer had been executed with the target RENDERBUFFER and name of zero.

    if (mRenderbuffer.id() == renderbuffer)
    {
        setRenderbufferBinding(context, nullptr);
    }

    // [OpenGL ES 2.0.24] section 4.4 page 111:
    // If a renderbuffer object is deleted while its image is attached to the currently bound
    // framebuffer, then it is as if FramebufferRenderbuffer had been called, with a renderbuffer of
    // 0, for each attachment point to which this image was attached in the currently bound
    // framebuffer.

    Framebuffer *readFramebuffer = mReadFramebuffer;
    Framebuffer *drawFramebuffer = mDrawFramebuffer;

    if (readFramebuffer && readFramebuffer->detachRenderbuffer(context, renderbuffer))
    {
        mDirtyObjects.set(DIRTY_OBJECT_READ_FRAMEBUFFER);
    }

    if (drawFramebuffer && drawFramebuffer != readFramebuffer)
    {
        if (drawFramebuffer->detachRenderbuffer(context, renderbuffer))
        {
            setDrawFramebufferDirty();
        }
    }
}

void State::setReadFramebufferBinding(Framebuffer *framebuffer)
{
    if (mReadFramebuffer == framebuffer)
        return;

    mReadFramebuffer = framebuffer;
    mDirtyBits.set(DIRTY_BIT_READ_FRAMEBUFFER_BINDING);

    if (mReadFramebuffer && mReadFramebuffer->hasAnyDirtyBit())
    {
        mDirtyObjects.set(DIRTY_OBJECT_READ_FRAMEBUFFER);
    }
}

void State::setDrawFramebufferBinding(Framebuffer *framebuffer)
{
    if (mDrawFramebuffer == framebuffer)
        return;

    mDrawFramebuffer = framebuffer;
    mDirtyBits.set(DIRTY_BIT_DRAW_FRAMEBUFFER_BINDING);

    if (mDrawFramebuffer)
    {
        mDrawFramebuffer->setWriteControlMode(getFramebufferSRGB() ? SrgbWriteControlMode::Default
                                                                   : SrgbWriteControlMode::Linear);

        if (mDrawFramebuffer->hasAnyDirtyBit())
        {
            mDirtyObjects.set(DIRTY_OBJECT_DRAW_FRAMEBUFFER);
        }

        if (mRobustResourceInit && mDrawFramebuffer->hasResourceThatNeedsInit())
        {
            mDirtyObjects.set(DIRTY_OBJECT_DRAW_ATTACHMENTS);
        }
    }
}

Framebuffer *State::getTargetFramebuffer(GLenum target) const
{
    switch (target)
    {
        case GL_READ_FRAMEBUFFER_ANGLE:
            return mReadFramebuffer;
        case GL_DRAW_FRAMEBUFFER_ANGLE:
        case GL_FRAMEBUFFER:
            return mDrawFramebuffer;
        default:
            UNREACHABLE();
            return nullptr;
    }
}

Framebuffer *State::getDefaultFramebuffer() const
{
    return mFramebufferManager->getDefaultFramebuffer();
}

bool State::removeReadFramebufferBinding(FramebufferID framebuffer)
{
    if (mReadFramebuffer != nullptr && mReadFramebuffer->id() == framebuffer)
    {
        setReadFramebufferBinding(nullptr);
        return true;
    }

    return false;
}

bool State::removeDrawFramebufferBinding(FramebufferID framebuffer)
{
    if (mReadFramebuffer != nullptr && mDrawFramebuffer->id() == framebuffer)
    {
        setDrawFramebufferBinding(nullptr);
        return true;
    }

    return false;
}

void State::setVertexArrayBinding(const Context *context, VertexArray *vertexArray)
{
    if (mVertexArray == vertexArray)
    {
        return;
    }

    if (mVertexArray)
    {
        mVertexArray->onBindingChanged(context, -1);
    }
    if (vertexArray)
    {
        vertexArray->onBindingChanged(context, 1);
    }

    mVertexArray = vertexArray;
    mDirtyBits.set(DIRTY_BIT_VERTEX_ARRAY_BINDING);

    if (mVertexArray && mVertexArray->hasAnyDirtyBit())
    {
        mDirtyObjects.set(DIRTY_OBJECT_VERTEX_ARRAY);
    }
}

bool State::removeVertexArrayBinding(const Context *context, VertexArrayID vertexArray)
{
    if (mVertexArray && mVertexArray->id().value == vertexArray.value)
    {
        mVertexArray->onBindingChanged(context, -1);
        mVertexArray = nullptr;
        mDirtyBits.set(DIRTY_BIT_VERTEX_ARRAY_BINDING);
        mDirtyObjects.set(DIRTY_OBJECT_VERTEX_ARRAY);
        return true;
    }

    return false;
}

VertexArrayID State::getVertexArrayId() const
{
    ASSERT(mVertexArray != nullptr);
    return mVertexArray->id();
}

void State::bindVertexBuffer(const Context *context,
                             GLuint bindingIndex,
                             Buffer *boundBuffer,
                             GLintptr offset,
                             GLsizei stride)
{
    getVertexArray()->bindVertexBuffer(context, bindingIndex, boundBuffer, offset, stride);
    mDirtyObjects.set(DIRTY_OBJECT_VERTEX_ARRAY);
}

void State::setVertexAttribFormat(GLuint attribIndex,
                                  GLint size,
                                  VertexAttribType type,
                                  bool normalized,
                                  bool pureInteger,
                                  GLuint relativeOffset)
{
    getVertexArray()->setVertexAttribFormat(attribIndex, size, type, normalized, pureInteger,
                                            relativeOffset);
    mDirtyObjects.set(DIRTY_OBJECT_VERTEX_ARRAY);
}

void State::setVertexBindingDivisor(const Context *context, GLuint bindingIndex, GLuint divisor)
{
    getVertexArray()->setVertexBindingDivisor(context, bindingIndex, divisor);
    mDirtyObjects.set(DIRTY_OBJECT_VERTEX_ARRAY);
}

angle::Result State::setProgram(const Context *context, Program *newProgram)
{
    if (newProgram && !newProgram->isLinked())
    {
        // Protect against applications that disable validation and try to use a program that was
        // not successfully linked.
        WARN() << "Attempted to use a program that was not successfully linked";
        return angle::Result::Continue;
    }

    if (mProgram != newProgram)
    {
        if (mProgram)
        {
            unsetActiveTextures(mExecutable->getActiveSamplersMask());
            mProgram->release(context);
        }

        mProgram    = newProgram;
        mExecutable = nullptr;

        if (mProgram)
        {
            mExecutable = &mProgram->getExecutable();
            newProgram->addRef();
            ANGLE_TRY(onProgramExecutableChange(context, newProgram));
        }
        else if (mProgramPipeline.get())
        {
            mExecutable = &mProgramPipeline->getExecutable();
            ANGLE_TRY(onProgramPipelineExecutableChange(context));
        }

        // Note that rendering is undefined if glUseProgram(0) is called. But ANGLE will generate
        // an error if the app tries to draw in this case.

        mDirtyBits.set(DIRTY_BIT_PROGRAM_BINDING);
    }

    return angle::Result::Continue;
}

void State::setTransformFeedbackBinding(const Context *context,
                                        TransformFeedback *transformFeedback)
{
    if (transformFeedback == mTransformFeedback.get())
        return;
    if (mTransformFeedback.get())
        mTransformFeedback->onBindingChanged(context, false);
    mTransformFeedback.set(context, transformFeedback);
    if (mTransformFeedback.get())
        mTransformFeedback->onBindingChanged(context, true);
    mDirtyBits.set(DIRTY_BIT_TRANSFORM_FEEDBACK_BINDING);
}

bool State::removeTransformFeedbackBinding(const Context *context,
                                           TransformFeedbackID transformFeedback)
{
    if (mTransformFeedback.id() == transformFeedback)
    {
        if (mTransformFeedback.get())
            mTransformFeedback->onBindingChanged(context, false);
        mTransformFeedback.set(context, nullptr);
        return true;
    }

    return false;
}

angle::Result State::setProgramPipelineBinding(const Context *context, ProgramPipeline *pipeline)
{
    if (mProgramPipeline.get() == pipeline)
    {
        return angle::Result::Continue;
    }

    if (mProgramPipeline.get())
    {
        unsetActiveTextures(mProgramPipeline->getExecutable().getActiveSamplersMask());
    }

    mProgramPipeline.set(context, pipeline);
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