1 files changed, 901 insertions, 0 deletions

diff --git a/gfx/angle/checkout/src/libANGLE/Context.h b/gfx/angle/checkout/src/libANGLE/Context.h
new file mode 100644
index 0000000000..fec6a6653c
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/Context.h
@@ -0,0 +1,901 @@
+//
+// Copyright 2002 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.h: Defines the gl::Context class, managing all GL state and performing
+// rendering operations. It is the GLES2 specific implementation of EGLContext.
+
+#ifndef LIBANGLE_CONTEXT_H_
+#define LIBANGLE_CONTEXT_H_
+
+#include <mutex>
+#include <set>
+#include <string>
+
+#include "angle_gl.h"
+#include "common/MemoryBuffer.h"
+#include "common/PackedEnums.h"
+#include "common/angleutils.h"
+#include "libANGLE/Caps.h"
+#include "libANGLE/Constants.h"
+#include "libANGLE/Context_gl_1_autogen.h"
+#include "libANGLE/Context_gl_2_autogen.h"
+#include "libANGLE/Context_gl_3_autogen.h"
+#include "libANGLE/Context_gl_4_autogen.h"
+#include "libANGLE/Context_gles_1_0_autogen.h"
+#include "libANGLE/Context_gles_2_0_autogen.h"
+#include "libANGLE/Context_gles_3_0_autogen.h"
+#include "libANGLE/Context_gles_3_1_autogen.h"
+#include "libANGLE/Context_gles_3_2_autogen.h"
+#include "libANGLE/Context_gles_ext_autogen.h"
+#include "libANGLE/Error.h"
+#include "libANGLE/Framebuffer.h"
+#include "libANGLE/HandleAllocator.h"
+#include "libANGLE/RefCountObject.h"
+#include "libANGLE/ResourceManager.h"
+#include "libANGLE/ResourceMap.h"
+#include "libANGLE/State.h"
+#include "libANGLE/VertexAttribute.h"
+#include "libANGLE/WorkerThread.h"
+#include "libANGLE/angletypes.h"
+
+namespace angle
+{
+class FrameCapture;
+class FrameCaptureShared;
+struct FrontendFeatures;
+}  // namespace angle
+
+namespace rx
+{
+class ContextImpl;
+class EGLImplFactory;
+}  // namespace rx
+
+namespace egl
+{
+class AttributeMap;
+class Surface;
+struct Config;
+class Thread;
+}  // namespace egl
+
+namespace gl
+{
+class Buffer;
+class Compiler;
+class FenceNV;
+class GLES1Renderer;
+class MemoryProgramCache;
+class MemoryShaderCache;
+class MemoryObject;
+class Program;
+class ProgramPipeline;
+class Query;
+class Renderbuffer;
+class Sampler;
+class Semaphore;
+class Shader;
+class Sync;
+class Texture;
+class TransformFeedback;
+class VertexArray;
+struct VertexAttribute;
+
+class ErrorSet : angle::NonCopyable
+{
+  public:
+    explicit ErrorSet(Context *context);
+    ~ErrorSet();
+
+    bool empty() const;
+    GLenum popError();
+
+    void handleError(GLenum errorCode,
+                     const char *message,
+                     const char *file,
+                     const char *function,
+                     unsigned int line);
+
+    void validationError(angle::EntryPoint entryPoint, GLenum errorCode, const char *message);
+
+  private:
+    Context *mContext;
+    std::set<GLenum> mErrors;
+};
+
+enum class VertexAttribTypeCase
+{
+    Invalid        = 0,
+    Valid          = 1,
+    ValidSize4Only = 2,
+    ValidSize3or4  = 3,
+};
+
+// Helper class for managing cache variables and state changes.
+class StateCache final : angle::NonCopyable
+{
+  public:
+    StateCache();
+    ~StateCache();
+
+    void initialize(Context *context);
+
+    // Places that can trigger updateActiveAttribsMask:
+    // 1. onVertexArrayBindingChange.
+    // 2. onProgramExecutableChange.
+    // 3. onVertexArrayStateChange.
+    // 4. onGLES1ClientStateChange.
+    AttributesMask getActiveBufferedAttribsMask() const { return mCachedActiveBufferedAttribsMask; }
+    AttributesMask getActiveClientAttribsMask() const { return mCachedActiveClientAttribsMask; }
+    AttributesMask getActiveDefaultAttribsMask() const { return mCachedActiveDefaultAttribsMask; }
+    bool hasAnyEnabledClientAttrib() const { return mCachedHasAnyEnabledClientAttrib; }
+    bool hasAnyActiveClientAttrib() const { return mCachedActiveClientAttribsMask.any(); }
+
+    // Places that can trigger updateVertexElementLimits:
+    // 1. onVertexArrayBindingChange.
+    // 2. onProgramExecutableChange.
+    // 3. onVertexArrayFormatChange.
+    // 4. onVertexArrayBufferChange.
+    // 5. onVertexArrayStateChange.
+    GLint64 getNonInstancedVertexElementLimit() const
+    {
+        return mCachedNonInstancedVertexElementLimit;
+    }
+    GLint64 getInstancedVertexElementLimit() const { return mCachedInstancedVertexElementLimit; }
+
+    // Places that can trigger updateBasicDrawStatesError:
+    // 1. onVertexArrayBindingChange.
+    // 2. onProgramExecutableChange.
+    // 3. onVertexArrayBufferContentsChange.
+    // 4. onVertexArrayStateChange.
+    // 5. onVertexArrayBufferStateChange.
+    // 6. onDrawFramebufferChange.
+    // 7. onContextCapChange.
+    // 8. onStencilStateChange.
+    // 9. onDefaultVertexAttributeChange.
+    // 10. onActiveTextureChange.
+    // 11. onQueryChange.
+    // 12. onActiveTransformFeedbackChange.
+    // 13. onUniformBufferStateChange.
+    // 14. onColorMaskChange.
+    // 15. onBufferBindingChange.
+    // 16. onBlendFuncIndexedChange.
+    bool hasBasicDrawStatesError(Context *context) const
+    {
+        if (mCachedBasicDrawStatesError == 0)
+        {
+            return false;
+        }
+        if (mCachedBasicDrawStatesError != kInvalidPointer)
+        {
+            return true;
+        }
+        return getBasicDrawStatesErrorImpl(context) != 0;
+    }
+
+    intptr_t getBasicDrawStatesError(const Context *context) const
+    {
+        if (mCachedBasicDrawStatesError != kInvalidPointer)
+        {
+            return mCachedBasicDrawStatesError;
+        }
+
+        return getBasicDrawStatesErrorImpl(context);
+    }
+
+    // Places that can trigger updateProgramPipelineError:
+    // 1. onProgramExecutableChange.
+    intptr_t getProgramPipelineError(const Context *context) const
+    {
+        if (mCachedProgramPipelineError != kInvalidPointer)
+        {
+            return mCachedProgramPipelineError;
+        }
+
+        return getProgramPipelineErrorImpl(context);
+    }
+
+    // Places that can trigger updateBasicDrawElementsError:
+    // 1. onActiveTransformFeedbackChange.
+    // 2. onVertexArrayBufferStateChange.
+    // 3. onBufferBindingChange.
+    // 4. onVertexArrayStateChange.
+    // 5. onVertexArrayBindingStateChange.
+    intptr_t getBasicDrawElementsError(const Context *context) const
+    {
+        if (mCachedBasicDrawElementsError != kInvalidPointer)
+        {
+            return mCachedBasicDrawElementsError;
+        }
+
+        return getBasicDrawElementsErrorImpl(context);
+    }
+
+    // Places that can trigger updateValidDrawModes:
+    // 1. onProgramExecutableChange.
+    // 2. onActiveTransformFeedbackChange.
+    bool isValidDrawMode(PrimitiveMode primitiveMode) const
+    {
+        return mCachedValidDrawModes[primitiveMode];
+    }
+
+    // Cannot change except on Context/Extension init.
+    bool isValidBindTextureType(TextureType type) const
+    {
+        return mCachedValidBindTextureTypes[type];
+    }
+
+    // Cannot change except on Context/Extension init.
+    bool isValidDrawElementsType(DrawElementsType type) const
+    {
+        return mCachedValidDrawElementsTypes[type];
+    }
+
+    // Places that can trigger updateTransformFeedbackActiveUnpaused:
+    // 1. onActiveTransformFeedbackChange.
+    bool isTransformFeedbackActiveUnpaused() const
+    {
+        return mCachedTransformFeedbackActiveUnpaused;
+    }
+
+    // Cannot change except on Context/Extension init.
+    VertexAttribTypeCase getVertexAttribTypeValidation(VertexAttribType type) const
+    {
+        return mCachedVertexAttribTypesValidation[type];
+    }
+
+    VertexAttribTypeCase getIntegerVertexAttribTypeValidation(VertexAttribType type) const
+    {
+        return mCachedIntegerVertexAttribTypesValidation[type];
+    }
+
+    // Places that can trigger updateActiveShaderStorageBufferIndices:
+    // 1. onProgramExecutableChange.
+    StorageBuffersMask getActiveShaderStorageBufferIndices() const
+    {
+        return mCachedActiveShaderStorageBufferIndices;
+    }
+
+    // Places that can trigger updateActiveImageUnitIndices:
+    // 1. onProgramExecutableChange.
+    const ImageUnitMask &getActiveImageUnitIndices() const { return mCachedActiveImageUnitIndices; }
+
+    // Places that can trigger updateCanDraw:
+    // 1. onProgramExecutableChange.
+    bool getCanDraw() const { return mCachedCanDraw; }
+
+    // State change notifications.
+    void onVertexArrayBindingChange(Context *context);
+    void onProgramExecutableChange(Context *context);
+    void onVertexArrayFormatChange(Context *context);
+    void onVertexArrayBufferContentsChange(Context *context);
+    void onVertexArrayStateChange(Context *context);
+    void onVertexArrayBufferStateChange(Context *context);
+    void onGLES1ClientStateChange(Context *context);
+    void onDrawFramebufferChange(Context *context);
+    void onContextCapChange(Context *context);
+    void onStencilStateChange(Context *context);
+    void onDefaultVertexAttributeChange(Context *context);
+    void onActiveTextureChange(Context *context);
+    void onQueryChange(Context *context);
+    void onActiveTransformFeedbackChange(Context *context);
+    void onUniformBufferStateChange(Context *context);
+    void onAtomicCounterBufferStateChange(Context *context);
+    void onShaderStorageBufferStateChange(Context *context);
+    void onColorMaskChange(Context *context);
+    void onBufferBindingChange(Context *context);
+    void onBlendFuncIndexedChange(Context *context);
+    void onBlendEquationChange(Context *context);
+
+  private:
+    // Cache update functions.
+    void updateActiveAttribsMask(Context *context);
+    void updateVertexElementLimits(Context *context);
+    void updateVertexElementLimitsImpl(Context *context);
+    void updateValidDrawModes(Context *context);
+    void updateValidBindTextureTypes(Context *context);
+    void updateValidDrawElementsTypes(Context *context);
+    void updateBasicDrawStatesError();
+    void updateProgramPipelineError();
+    void updateBasicDrawElementsError();
+    void updateTransformFeedbackActiveUnpaused(Context *context);
+    void updateVertexAttribTypesValidation(Context *context);
+    void updateActiveShaderStorageBufferIndices(Context *context);
+    void updateActiveImageUnitIndices(Context *context);
+    void updateCanDraw(Context *context);
+
+    void setValidDrawModes(bool pointsOK,
+                           bool linesOK,
+                           bool trisOK,
+                           bool lineAdjOK,
+                           bool triAdjOK,
+                           bool patchOK);
+
+    intptr_t getBasicDrawStatesErrorImpl(const Context *context) const;
+    intptr_t getProgramPipelineErrorImpl(const Context *context) const;
+    intptr_t getBasicDrawElementsErrorImpl(const Context *context) const;
+
+    static constexpr intptr_t kInvalidPointer = 1;
+
+    AttributesMask mCachedActiveBufferedAttribsMask;
+    AttributesMask mCachedActiveClientAttribsMask;
+    AttributesMask mCachedActiveDefaultAttribsMask;
+    bool mCachedHasAnyEnabledClientAttrib;
+    GLint64 mCachedNonInstancedVertexElementLimit;
+    GLint64 mCachedInstancedVertexElementLimit;
+    mutable intptr_t mCachedBasicDrawStatesError;
+    mutable intptr_t mCachedBasicDrawElementsError;
+    // mCachedProgramPipelineError checks only the
+    // current-program-exists subset of mCachedBasicDrawStatesError.
+    // Therefore, mCachedProgramPipelineError follows
+    // mCachedBasicDrawStatesError in that if mCachedBasicDrawStatesError is
+    // no-error, so is mCachedProgramPipelineError.  Otherwise, if
+    // mCachedBasicDrawStatesError is in error, the state of
+    // mCachedProgramPipelineError can be no-error or also in error, or
+    // unknown due to early exiting.
+    mutable intptr_t mCachedProgramPipelineError;
+    bool mCachedTransformFeedbackActiveUnpaused;
+    StorageBuffersMask mCachedActiveShaderStorageBufferIndices;
+    ImageUnitMask mCachedActiveImageUnitIndices;
+
+    // Reserve an extra slot at the end of these maps for invalid enum.
+    angle::PackedEnumMap<PrimitiveMode, bool, angle::EnumSize<PrimitiveMode>() + 1>
+        mCachedValidDrawModes;
+    angle::PackedEnumMap<TextureType, bool, angle::EnumSize<TextureType>() + 1>
+        mCachedValidBindTextureTypes;
+    angle::PackedEnumMap<DrawElementsType, bool, angle::EnumSize<DrawElementsType>() + 1>
+        mCachedValidDrawElementsTypes;
+    angle::PackedEnumMap<VertexAttribType,
+                         VertexAttribTypeCase,
+                         angle::EnumSize<VertexAttribType>() + 1>
+        mCachedVertexAttribTypesValidation;
+    angle::PackedEnumMap<VertexAttribType,
+                         VertexAttribTypeCase,
+                         angle::EnumSize<VertexAttribType>() + 1>
+        mCachedIntegerVertexAttribTypesValidation;
+
+    bool mCachedCanDraw;
+};
+
+using VertexArrayMap       = ResourceMap<VertexArray, VertexArrayID>;
+using QueryMap             = ResourceMap<Query, QueryID>;
+using TransformFeedbackMap = ResourceMap<TransformFeedback, TransformFeedbackID>;
+
+class Context final : public egl::LabeledObject, angle::NonCopyable, public angle::ObserverInterface
+{
+  public:
+    Context(egl::Display *display,
+            const egl::Config *config,
+            const Context *shareContext,
+            TextureManager *shareTextures,
+            SemaphoreManager *shareSemaphores,
+            MemoryProgramCache *memoryProgramCache,
+            MemoryShaderCache *memoryShaderCache,
+            const EGLenum clientType,
+            const egl::AttributeMap &attribs,
+            const egl::DisplayExtensions &displayExtensions,
+            const egl::ClientExtensions &clientExtensions);
+
+    // Use for debugging.
+    ContextID id() const { return mState.getContextID(); }
+
+    egl::Error initialize();
+
+    egl::Error onDestroy(const egl::Display *display);
+    ~Context() override;
+
+    void setLabel(EGLLabelKHR label) override;
+    EGLLabelKHR getLabel() const override;
+
+    egl::Error makeCurrent(egl::Display *display,
+                           egl::Surface *drawSurface,
+                           egl::Surface *readSurface);
+    egl::Error unMakeCurrent(const egl::Display *display);
+
+    // These create and destroy methods pass through to ResourceManager, which owns these objects.
+    BufferID createBuffer();
+    TextureID createTexture();
+    RenderbufferID createRenderbuffer();
+    ProgramPipelineID createProgramPipeline();
+    MemoryObjectID createMemoryObject();
+    SemaphoreID createSemaphore();
+
+    void deleteBuffer(BufferID buffer);
+    void deleteTexture(TextureID texture);
+    void deleteRenderbuffer(RenderbufferID renderbuffer);
+    void deleteProgramPipeline(ProgramPipelineID pipeline);
+    void deleteMemoryObject(MemoryObjectID memoryObject);
+    void deleteSemaphore(SemaphoreID semaphore);
+
+    void bindReadFramebuffer(FramebufferID framebufferHandle);
+    void bindDrawFramebuffer(FramebufferID framebufferHandle);
+
+    Buffer *getBuffer(BufferID handle) const;
+    FenceNV *getFenceNV(FenceNVID handle) const;
+    Sync *getSync(GLsync handle) const;
+    ANGLE_INLINE Texture *getTexture(TextureID handle) const
+    {
+        return mState.mTextureManager->getTexture(handle);
+    }
+
+    Framebuffer *getFramebuffer(FramebufferID handle) const;
+    Renderbuffer *getRenderbuffer(RenderbufferID handle) const;
+    VertexArray *getVertexArray(VertexArrayID handle) const;
+    Sampler *getSampler(SamplerID handle) const;
+    Query *getOrCreateQuery(QueryID handle, QueryType type);
+    Query *getQuery(QueryID handle) const;
+    TransformFeedback *getTransformFeedback(TransformFeedbackID handle) const;
+    ProgramPipeline *getProgramPipeline(ProgramPipelineID handle) const;
+    MemoryObject *getMemoryObject(MemoryObjectID handle) const;
+    Semaphore *getSemaphore(SemaphoreID handle) const;
+
+    Texture *getTextureByType(TextureType type) const;
+    Texture *getTextureByTarget(TextureTarget target) const;
+    Texture *getSamplerTexture(unsigned int sampler, TextureType type) const;
+
+    Compiler *getCompiler() const;
+
+    bool isVertexArrayGenerated(VertexArrayID vertexArray) const;
+    bool isTransformFeedbackGenerated(TransformFeedbackID transformFeedback) const;
+
+    bool isExternal() const { return mIsExternal; }
+    bool saveAndRestoreState() const { return mSaveAndRestoreState; }
+
+    void getBooleanvImpl(GLenum pname, GLboolean *params) const;
+    void getFloatvImpl(GLenum pname, GLfloat *params) const;
+    void getIntegervImpl(GLenum pname, GLint *params) const;
+    void getInteger64vImpl(GLenum pname, GLint64 *params) const;
+    void getIntegerVertexAttribImpl(GLenum pname, GLenum attribpname, GLint *params) const;
+    void getVertexAttribivImpl(GLuint index, GLenum pname, GLint *params) const;
+
+    // Framebuffers are owned by the Context, so these methods do not pass through
+    FramebufferID createFramebuffer();
+    void deleteFramebuffer(FramebufferID framebuffer);
+
+    bool hasActiveTransformFeedback(ShaderProgramID program) const;
+
+    // Desktop GL entry point interface
+    ANGLE_GL_1_CONTEXT_API
+    ANGLE_GL_2_CONTEXT_API
+    ANGLE_GL_3_CONTEXT_API
+    ANGLE_GL_4_CONTEXT_API
+
+    // GLES entry point interface
+    ANGLE_GLES_1_0_CONTEXT_API
+    ANGLE_GLES_2_0_CONTEXT_API
+    ANGLE_GLES_3_0_CONTEXT_API
+    ANGLE_GLES_3_1_CONTEXT_API
+    ANGLE_GLES_3_2_CONTEXT_API
+    ANGLE_GLES_EXT_CONTEXT_API
+
+    angle::Result handleNoopDrawEvent();
+
+    // Consumes an error.
+    void handleError(GLenum errorCode,
+                     const char *message,
+                     const char *file,
+                     const char *function,
+                     unsigned int line);
+
+    void validationError(angle::EntryPoint entryPoint, GLenum errorCode, const char *message) const;
+    ANGLE_FORMAT_PRINTF(4, 5)
+    void validationErrorF(angle::EntryPoint entryPoint,
+                          GLenum errorCode,
+                          const char *format,
+                          ...) const;
+
+    void markContextLost(GraphicsResetStatus status);
+
+    bool isContextLost() const { return mContextLost; }
+    void setContextLost();
+
+    GLenum getGraphicsResetStrategy() const { return mResetStrategy; }
+    bool isResetNotificationEnabled() const;
+
+    bool isRobustnessEnabled() const;
+
+    const egl::Config *getConfig() const;
+    EGLenum getClientType() const;
+    EGLenum getRenderBuffer() const;
+    EGLenum getContextPriority() const;
+
+    const GLubyte *getString(GLenum name) const;
+    const GLubyte *getStringi(GLenum name, GLuint index) const;
+
+    size_t getExtensionStringCount() const;
+
+    bool isExtensionRequestable(const char *name) const;
+    bool isExtensionDisablable(const char *name) const;
+    size_t getRequestableExtensionStringCount() const;
+    void setExtensionEnabled(const char *name, bool enabled);
+    void reinitializeAfterExtensionsChanged();
+
+    rx::ContextImpl *getImplementation() const { return mImplementation.get(); }
+
+    [[nodiscard]] bool getScratchBuffer(size_t requestedSizeBytes,
+                                        angle::MemoryBuffer **scratchBufferOut) const;
+    [[nodiscard]] bool getZeroFilledBuffer(size_t requstedSizeBytes,
+                                           angle::MemoryBuffer **zeroBufferOut) const;
+    angle::ScratchBuffer *getScratchBuffer() const;
+
+    angle::Result prepareForCopyImage();
+    angle::Result prepareForDispatch();
+    angle::Result prepareForInvalidate(GLenum target);
+
+    MemoryProgramCache *getMemoryProgramCache() const { return mMemoryProgramCache; }
+    MemoryShaderCache *getMemoryShaderCache() const { return mMemoryShaderCache; }
+
+    std::mutex &getProgramCacheMutex() const;
+
+    bool hasBeenCurrent() const { return mHasBeenCurrent; }
+    egl::Display *getDisplay() const { return mDisplay; }
+    egl::Surface *getCurrentDrawSurface() const { return mCurrentDrawSurface; }
+    egl::Surface *getCurrentReadSurface() const { return mCurrentReadSurface; }
+
+    bool isRobustResourceInitEnabled() const { return mState.isRobustResourceInitEnabled(); }
+
+    bool isCurrentTransformFeedback(const TransformFeedback *tf) const;
+
+    bool isCurrentVertexArray(const VertexArray *va) const
+    {
+        return mState.isCurrentVertexArray(va);
+    }
+
+    ANGLE_INLINE bool isShared() const { return mShared; }
+    // Once a context is setShared() it cannot be undone
+    void setShared() { mShared = true; }
+
+    const State &getState() const { return mState; }
+    GLint getClientMajorVersion() const { return mState.getClientMajorVersion(); }
+    GLint getClientMinorVersion() const { return mState.getClientMinorVersion(); }
+    const Version &getClientVersion() const { return mState.getClientVersion(); }
+    const Caps &getCaps() const { return mState.getCaps(); }
+    const TextureCapsMap &getTextureCaps() const { return mState.getTextureCaps(); }
+    const Extensions &getExtensions() const { return mState.getExtensions(); }
+    const Limitations &getLimitations() const { return mState.getLimitations(); }
+    bool isGLES1() const;
+
+    bool skipValidation() const
+    {
+        // Ensure we don't skip validation when context becomes lost, since implementations
+        // generally assume a non-lost context, non-null objects, etc.
+        ASSERT(!isContextLost() || !mSkipValidation);
+        return mSkipValidation;
+    }
+
+    // Specific methods needed for validation.
+    bool getQueryParameterInfo(GLenum pname, GLenum *type, unsigned int *numParams) const;
+    bool getIndexedQueryParameterInfo(GLenum target, GLenum *type, unsigned int *numParams) const;
+
+    ANGLE_INLINE Program *getProgramResolveLink(ShaderProgramID handle) const
+    {
+        Program *program = mState.mShaderProgramManager->getProgram(handle);
+        if (program)
+        {
+            program->resolveLink(this);
+        }
+        return program;
+    }
+
+    Program *getProgramNoResolveLink(ShaderProgramID handle) const;
+    Shader *getShader(ShaderProgramID handle) const;
+
+    ANGLE_INLINE bool isTextureGenerated(TextureID texture) const
+    {
+        return mState.mTextureManager->isHandleGenerated(texture);
+    }
+
+    ANGLE_INLINE bool isBufferGenerated(BufferID buffer) const
+    {
+        return mState.mBufferManager->isHandleGenerated(buffer);
+    }
+
+    bool isRenderbufferGenerated(RenderbufferID renderbuffer) const;
+    bool isFramebufferGenerated(FramebufferID framebuffer) const;
+    bool isProgramPipelineGenerated(ProgramPipelineID pipeline) const;
+    bool isQueryGenerated(QueryID query) const;
+
+    bool usingDisplayTextureShareGroup() const;
+    bool usingDisplaySemaphoreShareGroup() const;
+
+    // Hack for the special WebGL 1 "DEPTH_STENCIL" internal format.
+    GLenum getConvertedRenderbufferFormat(GLenum internalformat) const;
+
+    bool isWebGL() const { return mState.isWebGL(); }
+    bool isWebGL1() const { return mState.isWebGL1(); }
+
+    bool isValidBufferBinding(BufferBinding binding) const { return mValidBufferBindings[binding]; }
+
+    // GLES1 emulation: Renderer level (for validation)
+    int vertexArrayIndex(ClientVertexArrayType type) const;
+    static int TexCoordArrayIndex(unsigned int unit);
+
+    // GL_KHR_parallel_shader_compile
+    std::shared_ptr<angle::WorkerThreadPool> getShaderCompileThreadPool() const
+    {
+        if (mState.mExtensions.parallelShaderCompileKHR)
+        {
+            return mMultiThreadPool;
+        }
+        return mSingleThreadPool;
+    }
+
+    // Generic multithread pool.
+    std::shared_ptr<angle::WorkerThreadPool> getWorkerThreadPool() const
+    {
+        return mMultiThreadPool;
+    }
+
+    const StateCache &getStateCache() const { return mStateCache; }
+    StateCache &getStateCache() { return mStateCache; }
+
+    void onSubjectStateChange(angle::SubjectIndex index, angle::SubjectMessage message) override;
+
+    void onSamplerUniformChange(size_t textureUnitIndex);
+
+    bool isBufferAccessValidationEnabled() const { return mBufferAccessValidationEnabled; }
+
+    const angle::FrontendFeatures &getFrontendFeatures() const;
+
+    angle::FrameCapture *getFrameCapture() const { return mFrameCapture.get(); }
+
+    const VertexArrayMap &getVertexArraysForCapture() const { return mVertexArrayMap; }
+    const QueryMap &getQueriesForCapture() const { return mQueryMap; }
+    const TransformFeedbackMap &getTransformFeedbacksForCapture() const
+    {
+        return mTransformFeedbackMap;
+    }
+
+    void onPreSwap() const;
+
+    Program *getActiveLinkedProgram() const;
+
+    // EGL_ANGLE_power_preference implementation.
+    egl::Error releaseHighPowerGPU();
+    egl::Error reacquireHighPowerGPU();
+    void onGPUSwitch();
+
+    bool noopDraw(PrimitiveMode mode, GLsizei count) const;
+    bool noopDrawInstanced(PrimitiveMode mode, GLsizei count, GLsizei instanceCount) const;
+
+    bool isClearBufferMaskedOut(GLenum buffer, GLint drawbuffer) const;
+    bool noopClearBuffer(GLenum buffer, GLint drawbuffer) const;
+
+    void addRef() const { mRefCount++; }
+    void release() const { mRefCount--; }
+    size_t getRefCount() const { return mRefCount; }
+
+    egl::ShareGroup *getShareGroup() const { return mState.getShareGroup(); }
+
+    bool supportsGeometryOrTesselation() const;
+    void dirtyAllState();
+
+    bool isDestroyed() const { return mIsDestroyed; }
+    void setIsDestroyed() { mIsDestroyed = true; }
+
+    void setLogicOpEnabled(bool enabled) { mState.setLogicOpEnabled(enabled); }
+    void setLogicOp(LogicalOperation opcode) { mState.setLogicOp(opcode); }
+
+    // Needed by capture serialization logic that works with a "const" Context pointer.
+    void finishImmutable() const;
+
+    const angle::PerfMonitorCounterGroups &getPerfMonitorCounterGroups() const;
+
+  private:
+    void initializeDefaultResources();
+
+    angle::Result prepareForDraw(PrimitiveMode mode);
+    angle::Result prepareForClear(GLbitfield mask);
+    angle::Result prepareForClearBuffer(GLenum buffer, GLint drawbuffer);
+    angle::Result syncState(const State::DirtyBits &bitMask,
+                            const State::DirtyObjects &objectMask,
+                            Command command);
+    angle::Result syncDirtyBits(Command command);
+    angle::Result syncDirtyBits(const State::DirtyBits &bitMask, Command command);
+    angle::Result syncDirtyObjects(const State::DirtyObjects &objectMask, Command command);
+    angle::Result syncStateForReadPixels();
+    angle::Result syncStateForTexImage();
+    angle::Result syncStateForBlit(GLbitfield mask);
+    angle::Result syncStateForClear();
+    angle::Result syncTextureForCopy(Texture *texture);
+
+    VertexArray *checkVertexArrayAllocation(VertexArrayID vertexArrayHandle);
+    TransformFeedback *checkTransformFeedbackAllocation(TransformFeedbackID transformFeedback);
+
+    angle::Result onProgramLink(Program *programObject);
+
+    void detachBuffer(Buffer *buffer);
+    void detachTexture(TextureID texture);
+    void detachFramebuffer(FramebufferID framebuffer);
+    void detachRenderbuffer(RenderbufferID renderbuffer);
+    void detachVertexArray(VertexArrayID vertexArray);
+    void detachTransformFeedback(TransformFeedbackID transformFeedback);
+    void detachSampler(SamplerID sampler);
+    void detachProgramPipeline(ProgramPipelineID pipeline);
+
+    egl::Error setDefaultFramebuffer(egl::Surface *drawSurface, egl::Surface *readSurface);
+    egl::Error unsetDefaultFramebuffer();
+
+    void initRendererString();
+    void initVersionStrings();
+    void initExtensionStrings();
+
+    Extensions generateSupportedExtensions() const;
+    void initCaps();
+    void updateCaps();
+
+    gl::LabeledObject *getLabeledObject(GLenum identifier, GLuint name) const;
+    gl::LabeledObject *getLabeledObjectFromPtr(const void *ptr) const;
+
+    void setUniform1iImpl(Program *program,
+                          UniformLocation location,
+                          GLsizei count,
+                          const GLint *v);
+    void renderbufferStorageMultisampleImpl(GLenum target,
+                                            GLsizei samples,
+                                            GLenum internalformat,
+                                            GLsizei width,
+                                            GLsizei height,
+                                            MultisamplingMode mode);
+
+    State mState;
+    bool mShared;
+    bool mSkipValidation;
+    bool mDisplayTextureShareGroup;
+    bool mDisplaySemaphoreShareGroup;
+
+    // Recorded errors
+    ErrorSet mErrors;
+
+    // Stores for each buffer binding type whether is it allowed to be used in this context.
+    angle::PackedEnumBitSet<BufferBinding> mValidBufferBindings;
+
+    std::unique_ptr<rx::ContextImpl> mImplementation;
+
+    EGLLabelKHR mLabel;
+
+    // Extensions supported by the implementation plus extensions that are implemented entirely
+    // within the frontend.
+    Extensions mSupportedExtensions;
+
+    // Shader compiler. Lazily initialized hence the mutable value.
+    mutable BindingPointer<Compiler> mCompiler;
+
+    const egl::Config *mConfig;
+
+    TextureMap mZeroTextures;
+
+    ResourceMap<FenceNV, FenceNVID> mFenceNVMap;
+    HandleAllocator mFenceNVHandleAllocator;
+
+    QueryMap mQueryMap;
+    HandleAllocator mQueryHandleAllocator;
+
+    VertexArrayMap mVertexArrayMap;
+    HandleAllocator mVertexArrayHandleAllocator;
+
+    TransformFeedbackMap mTransformFeedbackMap;
+    HandleAllocator mTransformFeedbackHandleAllocator;
+
+    const char *mVersionString;
+    const char *mShadingLanguageString;
+    const char *mRendererString;
+    const char *mExtensionString;
+    std::vector<const char *> mExtensionStrings;
+    const char *mRequestableExtensionString;
+    std::vector<const char *> mRequestableExtensionStrings;
+
+    // GLES1 renderer state
+    std::unique_ptr<GLES1Renderer> mGLES1Renderer;
+
+    // Current/lost context flags
+    bool mHasBeenCurrent;
+    bool mContextLost;  // Set with setContextLost so that we also set mSkipValidation=false.
+    GraphicsResetStatus mResetStatus;
+    bool mContextLostForced;
+    GLenum mResetStrategy;
+    const bool mSurfacelessSupported;
+    egl::Surface *mCurrentDrawSurface;
+    egl::Surface *mCurrentReadSurface;
+    egl::Display *mDisplay;
+    const bool mWebGLContext;
+    bool mBufferAccessValidationEnabled;
+    const bool mExtensionsEnabled;
+    MemoryProgramCache *mMemoryProgramCache;
+    MemoryShaderCache *mMemoryShaderCache;
+
+    State::DirtyObjects mDrawDirtyObjects;
+
+    StateCache mStateCache;
+
+    State::DirtyBits mAllDirtyBits;
+    State::DirtyBits mTexImageDirtyBits;
+    State::DirtyObjects mTexImageDirtyObjects;
+    State::DirtyBits mReadPixelsDirtyBits;
+    State::DirtyObjects mReadPixelsDirtyObjects;
+    State::DirtyBits mClearDirtyBits;
+    State::DirtyObjects mClearDirtyObjects;
+    State::DirtyBits mBlitDirtyBits;
+    State::DirtyObjects mBlitDirtyObjects;
+    State::DirtyBits mComputeDirtyBits;
+    State::DirtyObjects mComputeDirtyObjects;
+    State::DirtyBits mCopyImageDirtyBits;
+    State::DirtyObjects mCopyImageDirtyObjects;
+    State::DirtyBits mReadInvalidateDirtyBits;
+    State::DirtyBits mDrawInvalidateDirtyBits;
+
+    // Binding to container objects that use dependent state updates.
+    angle::ObserverBinding mVertexArrayObserverBinding;
+    angle::ObserverBinding mDrawFramebufferObserverBinding;
+    angle::ObserverBinding mReadFramebufferObserverBinding;
+    angle::ObserverBinding mProgramPipelineObserverBinding;
+    std::vector<angle::ObserverBinding> mUniformBufferObserverBindings;
+    std::vector<angle::ObserverBinding> mAtomicCounterBufferObserverBindings;
+    std::vector<angle::ObserverBinding> mShaderStorageBufferObserverBindings;
+    std::vector<angle::ObserverBinding> mSamplerObserverBindings;
+    std::vector<angle::ObserverBinding> mImageObserverBindings;
+
+    // Not really a property of context state. The size and contexts change per-api-call.
+    mutable Optional<angle::ScratchBuffer> mScratchBuffer;
+    mutable Optional<angle::ScratchBuffer> mZeroFilledBuffer;
+
+    // Single-threaded pool may not always be initialized. It currently depends on the extension
+    // GL_KHR_parallel_shader_compile being disabled.
+    std::shared_ptr<angle::WorkerThreadPool> mSingleThreadPool;
+    // Multithreaded pool will always be initialized so it can be used for more generic work.
+    std::shared_ptr<angle::WorkerThreadPool> mMultiThreadPool;
+
+    // Note: we use a raw pointer here so we can exclude frame capture sources from the build.
+    std::unique_ptr<angle::FrameCapture> mFrameCapture;
+
+    // Cache representation of the serialized context string.
+    mutable std::string mCachedSerializedStateString;
+
+    mutable size_t mRefCount;
+
+    OverlayType mOverlay;
+
+    const bool mIsExternal;
+    const bool mSaveAndRestoreState;
+
+    bool mIsDestroyed;
+
+    std::unique_ptr<Framebuffer> mDefaultFramebuffer;
+};
+
+class [[nodiscard]] ScopedContextRef
+{
+  public:
+    ScopedContextRef(Context *context) : mContext(context)
+    {
+        if (mContext)
+        {
+            mContext->addRef();
+        }
+    }
+    ~ScopedContextRef()
+    {
+        if (mContext)
+        {
+            mContext->release();
+        }
+    }
+
+  private:
+    Context *const mContext;
+};
+
+// Thread-local current valid context bound to the thread.
+#if defined(ANGLE_PLATFORM_APPLE)
+extern Context *GetCurrentValidContextTLS();
+extern void SetCurrentValidContextTLS(Context *context);
+#else
+extern thread_local Context *gCurrentValidContext;
+#endif
+
+}  // namespace gl
+
+#endif  // LIBANGLE_CONTEXT_H_