The Tor Browser: gfx/gl/GLContext.h@b8a032363ba2 (annotated)

gfx/gl/GLContext.h@b8a032363ba2 (annotated)

gfx/gl/GLContext.h

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* vim: set ts=8 sts=4 et sw=4 tw=80: */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #ifndef GLCONTEXT_H_
 #define GLCONTEXT_H_
 #include <stdio.h>
 #include <stdint.h>
 #include <ctype.h>
 #include <map>
 #include <bitset>
 #ifdef DEBUG
 #include <string.h>
 #endif
 #ifdef WIN32
 #include <windows.h>
 #endif
 #ifdef GetClassName
 #undef GetClassName
 #endif
 #include "GLDefs.h"
 #include "GLLibraryLoader.h"
 #include "gfx3DMatrix.h"
 #include "nsISupportsImpl.h"
 #include "plstr.h"
 #include "nsDataHashtable.h"
 #include "nsHashKeys.h"
 #include "nsAutoPtr.h"
 #include "GLContextTypes.h"
 #include "GLTextureImage.h"
 #include "SurfaceTypes.h"
 #include "GLScreenBuffer.h"
 #include "GLContextSymbols.h"
 #include "mozilla/GenericRefCounted.h"
 #include "mozilla/Scoped.h"
 #include "gfx2DGlue.h"
 #ifdef DEBUG
 #define MOZ_ENABLE_GL_TRACKING 1
 #endif
 class nsIntRegion;
 class nsIRunnable;
 class nsIThread;
 namespace android {
     class GraphicBuffer;
 }
 namespace mozilla {
     namespace gfx {
         class SourceSurface;
         class DataSourceSurface;
         struct SurfaceCaps;
     }
     namespace gl {
         class GLContext;
         class GLLibraryEGL;
         class GLScreenBuffer;
         class TextureGarbageBin;
         class GLBlitHelper;
         class GLBlitTextureImageHelper;
         class GLReadTexImageHelper;
         class SharedSurface_GL;
     }
     namespace layers {
         class ColorTextureLayerProgram;
     }
 }
 namespace mozilla {
 namespace gl {
 MOZ_BEGIN_ENUM_CLASS(GLFeature)
     bind_buffer_offset,
     blend_minmax,
     depth_texture,
     draw_buffers,
     draw_instanced,
     draw_range_elements,
     element_index_uint,
     ES2_compatibility,
     ES3_compatibility,
     frag_color_float,
     frag_depth,
     framebuffer_blit,
     framebuffer_multisample,
     framebuffer_object,
     get_query_object_iv,
     instanced_arrays,
     instanced_non_arrays,
     occlusion_query,
     occlusion_query_boolean,
     occlusion_query2,
     packed_depth_stencil,
     query_objects,
     renderbuffer_color_float,
     renderbuffer_color_half_float,
     robustness,
     sRGB,
     standard_derivatives,
     texture_float,
     texture_float_linear,
     texture_half_float,
     texture_half_float_linear,
     texture_non_power_of_two,
     transform_feedback,
     vertex_array_object,
     EnumMax
 MOZ_END_ENUM_CLASS(GLFeature)
 MOZ_BEGIN_ENUM_CLASS(ContextProfile, uint8_t)
     Unknown = 0,
     OpenGL, // only for IsAtLeast's <profile> parameter
     OpenGLCore,
     OpenGLCompatibility,
     OpenGLES
 MOZ_END_ENUM_CLASS(ContextProfile)
 MOZ_BEGIN_ENUM_CLASS(GLVendor)
     Intel,
     NVIDIA,
     ATI,
     Qualcomm,
     Imagination,
     Nouveau,
     Vivante,
     VMware,
     Other
 MOZ_END_ENUM_CLASS(GLVendor)
 MOZ_BEGIN_ENUM_CLASS(GLRenderer)
     Adreno200,
     Adreno205,
     AdrenoTM205,
     AdrenoTM320,
     SGX530,
     SGX540,
     Tegra,
     AndroidEmulator,
     GalliumLlvmpipe,
     Other
 MOZ_END_ENUM_CLASS(GLRenderer)
 class GLContext
     : public GLLibraryLoader
     , public GenericAtomicRefCounted
 {
 // -----------------------------------------------------------------------------
 // basic enums
 public:
 // -----------------------------------------------------------------------------
 // basic getters
 public:
     /**
      * Returns true if the context is using ANGLE. This should only be overridden
      * for an ANGLE implementation.
      */
     virtual bool IsANGLE() const {
         return false;
     }
     /**
      * Return true if we are running on a OpenGL core profile context
      */
     inline bool IsCoreProfile() const {
         MOZ_ASSERT(mProfile != ContextProfile::Unknown, "unknown context profile");
         return mProfile == ContextProfile::OpenGLCore;
     }
     /**
      * Return true if we are running on a OpenGL compatibility profile context
      * (legacy profile 2.1 on Max OS X)
      */
     inline bool IsCompatibilityProfile() const {
         MOZ_ASSERT(mProfile != ContextProfile::Unknown, "unknown context profile");
         return mProfile == ContextProfile::OpenGLCompatibility;
     }
     /**
      * Return true if the context is a true OpenGL ES context or an ANGLE context
      */
     inline bool IsGLES() const {
         MOZ_ASSERT(mProfile != ContextProfile::Unknown, "unknown context profile");
         return mProfile == ContextProfile::OpenGLES;
     }
     static const char* GetProfileName(ContextProfile profile)
     {
         switch (profile)
         {
             case ContextProfile::OpenGL:
                 return "OpenGL";
             case ContextProfile::OpenGLCore:
                 return "OpenGL Core";
             case ContextProfile::OpenGLCompatibility:
                 return "OpenGL Compatibility";
             case ContextProfile::OpenGLES:
                 return "OpenGL ES";
             default:
                 break;
         }
         MOZ_ASSERT(profile != ContextProfile::Unknown, "unknown context profile");
         return "OpenGL unknown profile";
     }
     /**
      * Return true if we are running on a OpenGL core profile context
      */
     const char* ProfileString() const {
         return GetProfileName(mProfile);
     }
     /**
      * Return true if the context is compatible with given parameters
      *
      * IsAtLeast(ContextProfile::OpenGL, N) is exactly same as
      * IsAtLeast(ContextProfile::OpenGLCore, N) || IsAtLeast(ContextProfile::OpenGLCompatibility, N)
      */
     inline bool IsAtLeast(ContextProfile profile, unsigned int version) const
     {
         MOZ_ASSERT(profile != ContextProfile::Unknown, "IsAtLeast: bad <profile> parameter");
         MOZ_ASSERT(mProfile != ContextProfile::Unknown, "unknown context profile");
         MOZ_ASSERT(mVersion != 0, "unknown context version");
         if (version > mVersion) {
             return false;
         }
         if (profile == ContextProfile::OpenGL) {
             return profile == ContextProfile::OpenGLCore ||
                    profile == ContextProfile::OpenGLCompatibility;
         }
         return profile == mProfile;
     }
     /**
      * Return the version of the context.
      * Example :
      *   If this a OpenGL 2.1, that will return 210
      */
     inline unsigned int Version() const {
         return mVersion;
     }
     const char* VersionString() const {
         return mVersionString.get();
     }
     GLVendor Vendor() const {
         return mVendor;
     }
     GLRenderer Renderer() const {
         return mRenderer;
     }
     bool IsContextLost() const {
         return mContextLost;
     }
     /**
      * If this context is double-buffered, returns TRUE.
      */
     virtual bool IsDoubleBuffered() const {
         return false;
     }
     virtual GLContextType GetContextType() const = 0;
     virtual bool IsCurrent() = 0;
 protected:
     bool mInitialized;
     bool mIsOffscreen;
     bool mIsGlobalSharedContext;
     bool mContextLost;
     /**
      * mVersion store the OpenGL's version, multiplied by 100. For example, if
      * the context is an OpenGL 2.1 context, mVersion value will be 210.
      */
     unsigned int mVersion;
     nsCString mVersionString;
     ContextProfile mProfile;
     GLVendor mVendor;
     GLRenderer mRenderer;
     inline void SetProfileVersion(ContextProfile profile, unsigned int version) {
         MOZ_ASSERT(!mInitialized, "SetProfileVersion can only be called before initialization!");
         MOZ_ASSERT(profile != ContextProfile::Unknown && profile != ContextProfile::OpenGL, "Invalid `profile` for SetProfileVersion");
         MOZ_ASSERT(version >= 100, "Invalid `version` for SetProfileVersion");
         mVersion = version;
         mProfile = profile;
     }
 // -----------------------------------------------------------------------------
 // Extensions management
 /**
  * This mechanism is designed to know if an extension is supported. In the long
  * term, we would like to only use the extension group queries XXX_* to have
  * full compatibility with context version and profiles (especialy the core that
  * officialy don't bring any extensions).
  */
 public:
     /**
      * Known GL extensions that can be queried by
      * IsExtensionSupported.  The results of this are cached, and as
      * such it's safe to use this even in performance critical code.
      * If you add to this array, remember to add to the string names
      * in GLContext.cpp.
      */
     enum GLExtensions {
         EXT_framebuffer_object,
         ARB_framebuffer_object,
         ARB_texture_rectangle,
         EXT_bgra,
         EXT_texture_format_BGRA8888,
         OES_depth24,
         OES_depth32,
         OES_stencil8,
         OES_texture_npot,
         ARB_depth_texture,
         OES_depth_texture,
         OES_packed_depth_stencil,
         IMG_read_format,
         EXT_read_format_bgra,
         APPLE_client_storage,
         APPLE_texture_range,
         ARB_texture_non_power_of_two,
         ARB_pixel_buffer_object,
         ARB_ES2_compatibility,
         ARB_ES3_compatibility,
         OES_texture_float,
         OES_texture_float_linear,
         ARB_texture_float,
         OES_texture_half_float,
         OES_texture_half_float_linear,
         NV_half_float,
         EXT_color_buffer_float,
         EXT_color_buffer_half_float,
         ARB_color_buffer_float,
         EXT_unpack_subimage,
         OES_standard_derivatives,
         EXT_texture_filter_anisotropic,
         EXT_texture_compression_s3tc,
         EXT_texture_compression_dxt1,
         ANGLE_texture_compression_dxt3,
         ANGLE_texture_compression_dxt5,
         AMD_compressed_ATC_texture,
         IMG_texture_compression_pvrtc,
         EXT_framebuffer_blit,
         ANGLE_framebuffer_blit,
         EXT_framebuffer_multisample,
         ANGLE_framebuffer_multisample,
         OES_rgb8_rgba8,
         ARB_robustness,
         EXT_robustness,
         ARB_sync,
         OES_EGL_image,
         OES_EGL_sync,
         OES_EGL_image_external,
         EXT_packed_depth_stencil,
         OES_element_index_uint,
         OES_vertex_array_object,
         ARB_vertex_array_object,
         APPLE_vertex_array_object,
         ARB_draw_buffers,
         EXT_draw_buffers,
         EXT_gpu_shader4,
         EXT_blend_minmax,
         ARB_draw_instanced,
         EXT_draw_instanced,
         NV_draw_instanced,
         ARB_instanced_arrays,
         NV_instanced_arrays,
         ANGLE_instanced_arrays,
         EXT_occlusion_query_boolean,
         ARB_occlusion_query2,
         EXT_transform_feedback,
         NV_transform_feedback,
         ANGLE_depth_texture,
         EXT_sRGB,
         EXT_texture_sRGB,
         ARB_framebuffer_sRGB,
         EXT_framebuffer_sRGB,
         KHR_debug,
         ARB_half_float_pixel,
         EXT_frag_depth,
         OES_compressed_ETC1_RGB8_texture,
         EXT_draw_range_elements,
         Extensions_Max,
         Extensions_End
     };
     bool IsExtensionSupported(GLExtensions aKnownExtension) const {
         return mAvailableExtensions[aKnownExtension];
     }
     void MarkExtensionUnsupported(GLExtensions aKnownExtension) {
         mAvailableExtensions[aKnownExtension] = 0;
     }
     void MarkExtensionSupported(GLExtensions aKnownExtension) {
         mAvailableExtensions[aKnownExtension] = 1;
     }
 public:
     template<size_t N>
     static void InitializeExtensionsBitSet(std::bitset<N>& extensionsBitset, const char* extStr, const char** extList, bool verbose = false)
     {
         char* exts = ::strdup(extStr);
         if (verbose)
             printf_stderr("Extensions: %s\n", exts);
         char* cur = exts;
         bool done = false;
         while (!done) {
             char* space = strchr(cur, ' ');
             if (space) {
                 *space = '\0';
             } else {
                 done = true;
             }
             for (int i = 0; extList[i]; ++i) {
                 if (PL_strcasecmp(cur, extList[i]) == 0) {
                     if (verbose)
                         printf_stderr("Found extension %s\n", cur);
                     extensionsBitset[i] = true;
                 }
             }
             cur = space + 1;
         }
         free(exts);
     }
 protected:
     std::bitset<Extensions_Max> mAvailableExtensions;
 // -----------------------------------------------------------------------------
 // Feature queries
 /*
  * This mecahnism introduces a new way to check if a OpenGL feature is
  * supported, regardless of whether it is supported by an extension or natively
  * by the context version/profile
  */
 public:
     bool IsSupported(GLFeature feature) const {
         return mAvailableFeatures[size_t(feature)];
     }
     static const char* GetFeatureName(GLFeature feature);
 private:
     std::bitset<size_t(GLFeature::EnumMax)> mAvailableFeatures;
     /**
      * Init features regarding OpenGL extension and context version and profile
      */
     void InitFeatures();
     /**
      * Mark the feature and associated extensions as unsupported
      */
     void MarkUnsupported(GLFeature feature);
 // -----------------------------------------------------------------------------
 // Robustness handling
 public:
     bool HasRobustness() const {
         return mHasRobustness;
     }
     /**
      * The derived class is expected to provide information on whether or not it
      * supports robustness.
      */
     virtual bool SupportsRobustness() const = 0;
 private:
     bool mHasRobustness;
 // -----------------------------------------------------------------------------
 // Error handling
 public:
     static const char* GLErrorToString(GLenum aError)
     {
         switch (aError) {
             case LOCAL_GL_INVALID_ENUM:
                 return "GL_INVALID_ENUM";
             case LOCAL_GL_INVALID_VALUE:
                 return "GL_INVALID_VALUE";
             case LOCAL_GL_INVALID_OPERATION:
                 return "GL_INVALID_OPERATION";
             case LOCAL_GL_STACK_OVERFLOW:
                 return "GL_STACK_OVERFLOW";
             case LOCAL_GL_STACK_UNDERFLOW:
                 return "GL_STACK_UNDERFLOW";
             case LOCAL_GL_OUT_OF_MEMORY:
                 return "GL_OUT_OF_MEMORY";
             case LOCAL_GL_TABLE_TOO_LARGE:
                 return "GL_TABLE_TOO_LARGE";
             case LOCAL_GL_INVALID_FRAMEBUFFER_OPERATION:
                 return "GL_INVALID_FRAMEBUFFER_OPERATION";
             default:
                 return "";
         }
     }
     /** \returns the first GL error, and guarantees that all GL error flags are cleared,
      * i.e. that a subsequent GetError call will return NO_ERROR
      */
     GLenum GetAndClearError()
     {
         // the first error is what we want to return
         GLenum error = fGetError();
         if (error) {
             // clear all pending errors
             while(fGetError()) {}
         }
         return error;
     }
     /*** In GL debug mode, we completely override glGetError ***/
     GLenum fGetError()
     {
 #ifdef DEBUG
         // debug mode ends up eating the error in AFTER_GL_CALL
         if (DebugMode()) {
             GLenum err = mGLError;
             mGLError = LOCAL_GL_NO_ERROR;
             return err;
         }
 #endif // DEBUG
         return mSymbols.fGetError();
     }
 #ifdef DEBUG
 private:
     GLenum mGLError;
 #endif // DEBUG
 // -----------------------------------------------------------------------------
 // MOZ_GL_DEBUG implementation
 private:
 #undef BEFORE_GL_CALL
 #undef AFTER_GL_CALL
 #ifdef MOZ_ENABLE_GL_TRACKING
 #ifndef MOZ_FUNCTION_NAME
 # ifdef __GNUC__
 #  define MOZ_FUNCTION_NAME __PRETTY_FUNCTION__
 # elif defined(_MSC_VER)
 #  define MOZ_FUNCTION_NAME __FUNCTION__
 # else
 #  define MOZ_FUNCTION_NAME __func__  // defined in C99, supported in various C++ compilers. Just raw function name.
 # endif
 #endif
     void BeforeGLCall(const char* glFunction)
     {
         MOZ_ASSERT(IsCurrent());
         if (DebugMode()) {
             GLContext *currentGLContext = nullptr;
             currentGLContext = (GLContext*)PR_GetThreadPrivate(sCurrentGLContextTLS);
             if (DebugMode() & DebugTrace)
                 printf_stderr("[gl:%p] > %s\n", this, glFunction);
             if (this != currentGLContext) {
                 printf_stderr("Fatal: %s called on non-current context %p. "
                               "The current context for this thread is %p.\n",
                               glFunction, this, currentGLContext);
                 NS_ABORT();
             }
         }
     }
     void AfterGLCall(const char* glFunction)
     {
         if (DebugMode()) {
             // calling fFinish() immediately after every GL call makes sure that if this GL command crashes,
             // the stack trace will actually point to it. Otherwise, OpenGL being an asynchronous API, stack traces
             // tend to be meaningless
             mSymbols.fFinish();
             mGLError = mSymbols.fGetError();
             if (DebugMode() & DebugTrace)
                 printf_stderr("[gl:%p] < %s [0x%04x]\n", this, glFunction, mGLError);
             if (mGLError != LOCAL_GL_NO_ERROR) {
                 printf_stderr("GL ERROR: %s generated GL error %s(0x%04x)\n",
                               glFunction,
                               GLErrorToString(mGLError),
                               mGLError);
                 if (DebugMode() & DebugAbortOnError)
                     NS_ABORT();
             }
         }
     }
     GLContext *TrackingContext()
     {
         GLContext *tip = this;
         while (tip->mSharedContext)
             tip = tip->mSharedContext;
         return tip;
     }
 #define BEFORE_GL_CALL                              \
             do {                                    \
                 BeforeGLCall(MOZ_FUNCTION_NAME);    \
             } while (0)
 #define AFTER_GL_CALL                               \
             do {                                    \
                 AfterGLCall(MOZ_FUNCTION_NAME);     \
             } while (0)
 #define TRACKING_CONTEXT(a)                         \
             do {                                    \
                 TrackingContext()->a;               \
             } while (0)
 #else // ifdef DEBUG
 #define BEFORE_GL_CALL do { } while (0)
 #define AFTER_GL_CALL do { } while (0)
 #define TRACKING_CONTEXT(a) do {} while (0)
 #endif // ifdef DEBUG
 #define ASSERT_SYMBOL_PRESENT(func) \
             do {\
                 MOZ_ASSERT(strstr(MOZ_FUNCTION_NAME, #func) != nullptr, "Mismatched symbol check.");\
                 if (MOZ_UNLIKELY(!mSymbols.func)) {\
                     printf_stderr("RUNTIME ASSERT: Uninitialized GL function: %s\n", #func);\
                     MOZ_CRASH();\
                 }\
             } while (0)
     // Do whatever setup is necessary to draw to our offscreen FBO, if it's
     // bound.
     void BeforeGLDrawCall() {
     }
     // Do whatever tear-down is necessary after drawing to our offscreen FBO,
     // if it's bound.
     void AfterGLDrawCall()
     {
         if (mScreen)
             mScreen->AfterDrawCall();
     }
     // Do whatever setup is necessary to read from our offscreen FBO, if it's
     // bound.
     void BeforeGLReadCall()
     {
         if (mScreen)
             mScreen->BeforeReadCall();
     }
     // Do whatever tear-down is necessary after reading from our offscreen FBO,
     // if it's bound.
     void AfterGLReadCall() {
     }
 // -----------------------------------------------------------------------------
 // GL official entry points
 public:
     void fActiveTexture(GLenum texture) {
         BEFORE_GL_CALL;
         mSymbols.fActiveTexture(texture);
         AFTER_GL_CALL;
     }
     void fAttachShader(GLuint program, GLuint shader) {
         BEFORE_GL_CALL;
         mSymbols.fAttachShader(program, shader);
         AFTER_GL_CALL;
     }
     void fBeginQuery(GLenum target, GLuint id) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBeginQuery);
         mSymbols.fBeginQuery(target, id);
         AFTER_GL_CALL;
     }
     void fBindAttribLocation(GLuint program, GLuint index, const GLchar* name) {
         BEFORE_GL_CALL;
         mSymbols.fBindAttribLocation(program, index, name);
         AFTER_GL_CALL;
     }
     void fBindBuffer(GLenum target, GLuint buffer) {
         BEFORE_GL_CALL;
         mSymbols.fBindBuffer(target, buffer);
         AFTER_GL_CALL;
     }
     void fBindFramebuffer(GLenum target, GLuint framebuffer) {
         if (!mScreen) {
             raw_fBindFramebuffer(target, framebuffer);
             return;
         }
         switch (target) {
             case LOCAL_GL_DRAW_FRAMEBUFFER_EXT:
                 mScreen->BindDrawFB(framebuffer);
                 return;
             case LOCAL_GL_READ_FRAMEBUFFER_EXT:
                 mScreen->BindReadFB(framebuffer);
                 return;
             case LOCAL_GL_FRAMEBUFFER:
                 mScreen->BindFB(framebuffer);
                 return;
             default:
                 // Nothing we care about, likely an error.
                 break;
         }
         raw_fBindFramebuffer(target, framebuffer);
     }
     void fBindTexture(GLenum target, GLuint texture) {
         BEFORE_GL_CALL;
         mSymbols.fBindTexture(target, texture);
         AFTER_GL_CALL;
     }
     void fBlendColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha) {
         BEFORE_GL_CALL;
         mSymbols.fBlendColor(red, green, blue, alpha);
         AFTER_GL_CALL;
     }
     void fBlendEquation(GLenum mode) {
         BEFORE_GL_CALL;
         mSymbols.fBlendEquation(mode);
         AFTER_GL_CALL;
     }
     void fBlendEquationSeparate(GLenum modeRGB, GLenum modeAlpha) {
         BEFORE_GL_CALL;
         mSymbols.fBlendEquationSeparate(modeRGB, modeAlpha);
         AFTER_GL_CALL;
     }
     void fBlendFunc(GLenum sfactor, GLenum dfactor) {
         BEFORE_GL_CALL;
         mSymbols.fBlendFunc(sfactor, dfactor);
         AFTER_GL_CALL;
     }
     void fBlendFuncSeparate(GLenum sfactorRGB, GLenum dfactorRGB, GLenum sfactorAlpha, GLenum dfactorAlpha) {
         BEFORE_GL_CALL;
         mSymbols.fBlendFuncSeparate(sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha);
         AFTER_GL_CALL;
     }
 private:
     void raw_fBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage) {
         BEFORE_GL_CALL;
         mSymbols.fBufferData(target, size, data, usage);
         AFTER_GL_CALL;
     }
 public:
     void fBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage) {
         raw_fBufferData(target, size, data, usage);
         // bug 744888
         if (WorkAroundDriverBugs() &&
             !data &&
             Vendor() == GLVendor::NVIDIA)
         {
             char c = 0;
             fBufferSubData(target, size-1, 1, &c);
         }
     }
     void fBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid* data) {
         BEFORE_GL_CALL;
         mSymbols.fBufferSubData(target, offset, size, data);
         AFTER_GL_CALL;
     }
 private:
     void raw_fClear(GLbitfield mask) {
         BEFORE_GL_CALL;
         mSymbols.fClear(mask);
         AFTER_GL_CALL;
     }
 public:
     void fClear(GLbitfield mask) {
         BeforeGLDrawCall();
         raw_fClear(mask);
         AfterGLDrawCall();
     }
     void fClearColor(GLclampf r, GLclampf g, GLclampf b, GLclampf a) {
         BEFORE_GL_CALL;
         mSymbols.fClearColor(r, g, b, a);
         AFTER_GL_CALL;
     }
     void fClearStencil(GLint s) {
         BEFORE_GL_CALL;
         mSymbols.fClearStencil(s);
         AFTER_GL_CALL;
     }
     void fClientActiveTexture(GLenum texture) {
         BEFORE_GL_CALL;
         mSymbols.fClientActiveTexture(texture);
         AFTER_GL_CALL;
     }
     void fColorMask(realGLboolean red, realGLboolean green, realGLboolean blue, realGLboolean alpha) {
         BEFORE_GL_CALL;
         mSymbols.fColorMask(red, green, blue, alpha);
         AFTER_GL_CALL;
     }
     void fCompressedTexImage2D(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLint border, GLsizei imageSize, const GLvoid *pixels) {
         BEFORE_GL_CALL;
         mSymbols.fCompressedTexImage2D(target, level, internalformat, width, height, border, imageSize, pixels);
         AFTER_GL_CALL;
     }
     void fCompressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const GLvoid *pixels) {
         BEFORE_GL_CALL;
         mSymbols.fCompressedTexSubImage2D(target, level, xoffset, yoffset, width, height, format, imageSize, pixels);
         AFTER_GL_CALL;
     }
     void fCopyTexImage2D(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border) {
         if (!IsTextureSizeSafeToPassToDriver(target, width, height)) {
             // pass wrong values to cause the GL to generate GL_INVALID_VALUE.
             // See bug 737182 and the comment in IsTextureSizeSafeToPassToDriver.
             level = -1;
             width = -1;
             height = -1;
             border = -1;
         }
         BeforeGLReadCall();
         raw_fCopyTexImage2D(target, level, internalformat,
                             x, y, width, height, border);
         AfterGLReadCall();
     }
     void fCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height) {
         BeforeGLReadCall();
         raw_fCopyTexSubImage2D(target, level, xoffset, yoffset,
                                x, y, width, height);
         AfterGLReadCall();
     }
     void fCullFace(GLenum mode) {
         BEFORE_GL_CALL;
         mSymbols.fCullFace(mode);
         AFTER_GL_CALL;
     }
     void fDebugMessageCallback(GLDEBUGPROC callback, const GLvoid* userParam) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDebugMessageCallback);
         mSymbols.fDebugMessageCallback(callback, userParam);
         AFTER_GL_CALL;
     }
     void fDebugMessageControl(GLenum source, GLenum type, GLenum severity, GLsizei count, const GLuint* ids, realGLboolean enabled) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDebugMessageControl);
         mSymbols.fDebugMessageControl(source, type, severity, count, ids, enabled);
         AFTER_GL_CALL;
     }
     void fDebugMessageInsert(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* buf) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDebugMessageInsert);
         mSymbols.fDebugMessageInsert(source, type, id, severity, length, buf);
         AFTER_GL_CALL;
     }
     void fDetachShader(GLuint program, GLuint shader) {
         BEFORE_GL_CALL;
         mSymbols.fDetachShader(program, shader);
         AFTER_GL_CALL;
     }
     void fDepthFunc(GLenum func) {
         BEFORE_GL_CALL;
         mSymbols.fDepthFunc(func);
         AFTER_GL_CALL;
     }
     void fDepthMask(realGLboolean flag) {
         BEFORE_GL_CALL;
         mSymbols.fDepthMask(flag);
         AFTER_GL_CALL;
     }
     void fDisable(GLenum capability) {
         BEFORE_GL_CALL;
         mSymbols.fDisable(capability);
         AFTER_GL_CALL;
     }
     void fDisableClientState(GLenum capability) {
         BEFORE_GL_CALL;
         mSymbols.fDisableClientState(capability);
         AFTER_GL_CALL;
     }
     void fDisableVertexAttribArray(GLuint index) {
         BEFORE_GL_CALL;
         mSymbols.fDisableVertexAttribArray(index);
         AFTER_GL_CALL;
     }
     void fDrawBuffer(GLenum mode) {
         BEFORE_GL_CALL;
         mSymbols.fDrawBuffer(mode);
         AFTER_GL_CALL;
     }
 private:
     void raw_fDrawArrays(GLenum mode, GLint first, GLsizei count) {
         BEFORE_GL_CALL;
         mSymbols.fDrawArrays(mode, first, count);
         AFTER_GL_CALL;
     }
     void raw_fDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices) {
         BEFORE_GL_CALL;
         mSymbols.fDrawElements(mode, count, type, indices);
         AFTER_GL_CALL;
     }
 public:
     void fDrawArrays(GLenum mode, GLint first, GLsizei count) {
         BeforeGLDrawCall();
         raw_fDrawArrays(mode, first, count);
         AfterGLDrawCall();
     }
     void fDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid *indices) {
         BeforeGLDrawCall();
         raw_fDrawElements(mode, count, type, indices);
         AfterGLDrawCall();
     }
     void fEnable(GLenum capability) {
         BEFORE_GL_CALL;
         mSymbols.fEnable(capability);
         AFTER_GL_CALL;
     }
     void fEnableClientState(GLenum capability) {
         BEFORE_GL_CALL;
         mSymbols.fEnableClientState(capability);
         AFTER_GL_CALL;
     }
     void fEnableVertexAttribArray(GLuint index) {
         BEFORE_GL_CALL;
         mSymbols.fEnableVertexAttribArray(index);
         AFTER_GL_CALL;
     }
     void fEndQuery(GLenum target) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fEndQuery);
         mSymbols.fEndQuery(target);
         AFTER_GL_CALL;
     }
     void fFinish() {
         BEFORE_GL_CALL;
         mSymbols.fFinish();
         AFTER_GL_CALL;
     }
     void fFlush() {
         BEFORE_GL_CALL;
         mSymbols.fFlush();
         AFTER_GL_CALL;
     }
     void fFrontFace(GLenum face) {
         BEFORE_GL_CALL;
         mSymbols.fFrontFace(face);
         AFTER_GL_CALL;
     }
     void fGetActiveAttrib(GLuint program, GLuint index, GLsizei maxLength, GLsizei* length, GLint* size, GLenum* type, GLchar* name) {
         BEFORE_GL_CALL;
         mSymbols.fGetActiveAttrib(program, index, maxLength, length, size, type, name);
         AFTER_GL_CALL;
     }
     void fGetActiveUniform(GLuint program, GLuint index, GLsizei maxLength, GLsizei* length, GLint* size, GLenum* type, GLchar* name) {
         BEFORE_GL_CALL;
         mSymbols.fGetActiveUniform(program, index, maxLength, length, size, type, name);
         AFTER_GL_CALL;
     }
     void fGetAttachedShaders(GLuint program, GLsizei maxCount, GLsizei* count, GLuint* shaders) {
         BEFORE_GL_CALL;
         mSymbols.fGetAttachedShaders(program, maxCount, count, shaders);
         AFTER_GL_CALL;
     }
     GLint fGetAttribLocation(GLuint program, const GLchar* name) {
         BEFORE_GL_CALL;
         GLint retval = mSymbols.fGetAttribLocation(program, name);
         AFTER_GL_CALL;
         return retval;
     }
 private:
     void raw_fGetIntegerv(GLenum pname, GLint *params) {
         BEFORE_GL_CALL;
         mSymbols.fGetIntegerv(pname, params);
         AFTER_GL_CALL;
     }
 public:
     void fGetIntegerv(GLenum pname, GLint *params) {
         switch (pname)
         {
             // LOCAL_GL_FRAMEBUFFER_BINDING is equal to
             // LOCAL_GL_DRAW_FRAMEBUFFER_BINDING_EXT,
             // so we don't need two cases.
             case LOCAL_GL_DRAW_FRAMEBUFFER_BINDING_EXT:
                 if (mScreen) {
                     *params = mScreen->GetDrawFB();
                 } else {
                     raw_fGetIntegerv(pname, params);
                 }
                 break;
             case LOCAL_GL_READ_FRAMEBUFFER_BINDING_EXT:
                 if (mScreen) {
                     *params = mScreen->GetReadFB();
                 } else {
                     raw_fGetIntegerv(pname, params);
                 }
                 break;
             case LOCAL_GL_MAX_TEXTURE_SIZE:
                 MOZ_ASSERT(mMaxTextureSize>0);
                 *params = mMaxTextureSize;
                 break;
             case LOCAL_GL_MAX_CUBE_MAP_TEXTURE_SIZE:
                 MOZ_ASSERT(mMaxCubeMapTextureSize>0);
                 *params = mMaxCubeMapTextureSize;
                 break;
             case LOCAL_GL_MAX_RENDERBUFFER_SIZE:
                 MOZ_ASSERT(mMaxRenderbufferSize>0);
                 *params = mMaxRenderbufferSize;
                 break;
             case LOCAL_GL_VIEWPORT:
                 for (size_t i = 0; i < 4; i++) {
                     params[i] = mViewportRect[i];
                 }
                 break;
             case LOCAL_GL_SCISSOR_BOX:
                 for (size_t i = 0; i < 4; i++) {
                     params[i] = mScissorRect[i];
                 }
                 break;
             default:
                 raw_fGetIntegerv(pname, params);
                 break;
         }
     }
     void GetUIntegerv(GLenum pname, GLuint *params) {
         fGetIntegerv(pname, reinterpret_cast<GLint*>(params));
     }
     void fGetFloatv(GLenum pname, GLfloat *params) {
         BEFORE_GL_CALL;
         mSymbols.fGetFloatv(pname, params);
         AFTER_GL_CALL;
     }
     void fGetBooleanv(GLenum pname, realGLboolean *params) {
         BEFORE_GL_CALL;
         mSymbols.fGetBooleanv(pname, params);
         AFTER_GL_CALL;
     }
     void fGetBufferParameteriv(GLenum target, GLenum pname, GLint* params) {
         BEFORE_GL_CALL;
         mSymbols.fGetBufferParameteriv(target, pname, params);
         AFTER_GL_CALL;
     }
     GLuint fGetDebugMessageLog(GLuint count, GLsizei bufsize, GLenum* sources, GLenum* types, GLuint* ids, GLenum* severities, GLsizei* lengths, GLchar* messageLog) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetDebugMessageLog);
         GLuint ret = mSymbols.fGetDebugMessageLog(count, bufsize, sources, types, ids, severities, lengths, messageLog);
         AFTER_GL_CALL;
         return ret;
     }
     void fGetPointerv(GLenum pname, GLvoid** params) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetPointerv);
         mSymbols.fGetPointerv(pname, params);
         AFTER_GL_CALL;
     }
     void fGetObjectLabel(GLenum identifier, GLuint name, GLsizei bufSize, GLsizei* length, GLchar* label) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetObjectLabel);
         mSymbols.fGetObjectLabel(identifier, name, bufSize, length, label);
         AFTER_GL_CALL;
     }
     void fGetObjectPtrLabel(const GLvoid* ptr, GLsizei bufSize, GLsizei* length, GLchar* label) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetObjectPtrLabel);
         mSymbols.fGetObjectPtrLabel(ptr, bufSize, length, label);
         AFTER_GL_CALL;
     }
     void fGenerateMipmap(GLenum target) {
         BEFORE_GL_CALL;
         mSymbols.fGenerateMipmap(target);
         AFTER_GL_CALL;
     }
     void fGetProgramiv(GLuint program, GLenum pname, GLint* param) {
         BEFORE_GL_CALL;
         mSymbols.fGetProgramiv(program, pname, param);
         AFTER_GL_CALL;
     }
     void fGetProgramInfoLog(GLuint program, GLsizei bufSize, GLsizei* length, GLchar* infoLog) {
         BEFORE_GL_CALL;
         mSymbols.fGetProgramInfoLog(program, bufSize, length, infoLog);
         AFTER_GL_CALL;
     }
     void fTexParameteri(GLenum target, GLenum pname, GLint param) {
         BEFORE_GL_CALL;
         mSymbols.fTexParameteri(target, pname, param);
         AFTER_GL_CALL;
     }
     void fTexParameteriv(GLenum target, GLenum pname, const GLint* params) {
         BEFORE_GL_CALL;
         mSymbols.fTexParameteriv(target, pname, params);
         AFTER_GL_CALL;
     }
     void fTexParameterf(GLenum target, GLenum pname, GLfloat param) {
         BEFORE_GL_CALL;
         mSymbols.fTexParameterf(target, pname, param);
         AFTER_GL_CALL;
     }
     const GLubyte* fGetString(GLenum name) {
         BEFORE_GL_CALL;
         const GLubyte *result = mSymbols.fGetString(name);
         AFTER_GL_CALL;
         return result;
     }
     void fGetTexImage(GLenum target, GLint level, GLenum format, GLenum type, GLvoid *img) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetTexImage);
         mSymbols.fGetTexImage(target, level, format, type, img);
         AFTER_GL_CALL;
     }
     void fGetTexLevelParameteriv(GLenum target, GLint level, GLenum pname, GLint *params)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetTexLevelParameteriv);
         mSymbols.fGetTexLevelParameteriv(target, level, pname, params);
         AFTER_GL_CALL;
     }
     void fGetTexParameterfv(GLenum target, GLenum pname, GLfloat* params) {
         BEFORE_GL_CALL;
         mSymbols.fGetTexParameterfv(target, pname, params);
         AFTER_GL_CALL;
     }
     void fGetTexParameteriv(GLenum target, GLenum pname, GLint* params) {
         BEFORE_GL_CALL;
         mSymbols.fGetTexParameteriv(target, pname, params);
         AFTER_GL_CALL;
     }
     void fGetUniformfv(GLuint program, GLint location, GLfloat* params) {
         BEFORE_GL_CALL;
         mSymbols.fGetUniformfv(program, location, params);
         AFTER_GL_CALL;
     }
     void fGetUniformiv(GLuint program, GLint location, GLint* params) {
         BEFORE_GL_CALL;
         mSymbols.fGetUniformiv(program, location, params);
         AFTER_GL_CALL;
     }
     GLint fGetUniformLocation (GLint programObj, const GLchar* name) {
         BEFORE_GL_CALL;
         GLint retval = mSymbols.fGetUniformLocation(programObj, name);
         AFTER_GL_CALL;
         return retval;
     }
     void fGetVertexAttribfv(GLuint index, GLenum pname, GLfloat* retval) {
         BEFORE_GL_CALL;
         mSymbols.fGetVertexAttribfv(index, pname, retval);
         AFTER_GL_CALL;
     }
     void fGetVertexAttribiv(GLuint index, GLenum pname, GLint* retval) {
         BEFORE_GL_CALL;
         mSymbols.fGetVertexAttribiv(index, pname, retval);
         AFTER_GL_CALL;
     }
     void fGetVertexAttribPointerv(GLuint index, GLenum pname, GLvoid** retval) {
         BEFORE_GL_CALL;
         mSymbols.fGetVertexAttribPointerv(index, pname, retval);
         AFTER_GL_CALL;
     }
     void fHint(GLenum target, GLenum mode) {
         BEFORE_GL_CALL;
         mSymbols.fHint(target, mode);
         AFTER_GL_CALL;
     }
     realGLboolean fIsBuffer(GLuint buffer) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsBuffer(buffer);
         AFTER_GL_CALL;
         return retval;
     }
     realGLboolean fIsEnabled(GLenum capability) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsEnabled(capability);
         AFTER_GL_CALL;
         return retval;
     }
     realGLboolean fIsProgram(GLuint program) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsProgram(program);
         AFTER_GL_CALL;
         return retval;
     }
     realGLboolean fIsShader(GLuint shader) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsShader(shader);
         AFTER_GL_CALL;
         return retval;
     }
     realGLboolean fIsTexture(GLuint texture) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsTexture(texture);
         AFTER_GL_CALL;
         return retval;
     }
     void fLineWidth(GLfloat width) {
         BEFORE_GL_CALL;
         mSymbols.fLineWidth(width);
         AFTER_GL_CALL;
     }
     void fLinkProgram(GLuint program) {
         BEFORE_GL_CALL;
         mSymbols.fLinkProgram(program);
         AFTER_GL_CALL;
     }
     void fObjectLabel(GLenum identifier, GLuint name, GLsizei length, const GLchar* label) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fObjectLabel);
         mSymbols.fObjectLabel(identifier, name, length, label);
         AFTER_GL_CALL;
     }
     void fObjectPtrLabel(const GLvoid* ptr, GLsizei length, const GLchar* label) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fObjectPtrLabel);
         mSymbols.fObjectPtrLabel(ptr, length, label);
         AFTER_GL_CALL;
     }
     void fLoadIdentity() {
         BEFORE_GL_CALL;
         mSymbols.fLoadIdentity();
         AFTER_GL_CALL;
     }
     void fLoadMatrixf(const GLfloat *matrix) {
         BEFORE_GL_CALL;
         mSymbols.fLoadMatrixf(matrix);
         AFTER_GL_CALL;
     }
     void fMatrixMode(GLenum mode) {
         BEFORE_GL_CALL;
         mSymbols.fMatrixMode(mode);
         AFTER_GL_CALL;
     }
     void fPixelStorei(GLenum pname, GLint param) {
         BEFORE_GL_CALL;
         mSymbols.fPixelStorei(pname, param);
         AFTER_GL_CALL;
     }
     void fTextureRangeAPPLE(GLenum target, GLsizei length, GLvoid *pointer) {
         BEFORE_GL_CALL;
         mSymbols.fTextureRangeAPPLE(target, length, pointer);
         AFTER_GL_CALL;
     }
     void fPointParameterf(GLenum pname, GLfloat param) {
         BEFORE_GL_CALL;
         mSymbols.fPointParameterf(pname, param);
         AFTER_GL_CALL;
     }
     void fPolygonOffset(GLfloat factor, GLfloat bias) {
         BEFORE_GL_CALL;
         mSymbols.fPolygonOffset(factor, bias);
         AFTER_GL_CALL;
     }
     void fPopDebugGroup() {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fPopDebugGroup);
         mSymbols.fPopDebugGroup();
         AFTER_GL_CALL;
     }
     void fPushDebugGroup(GLenum source, GLuint id, GLsizei length, const GLchar* message) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fPushDebugGroup);
         mSymbols.fPushDebugGroup(source, id, length, message);
         AFTER_GL_CALL;
     }
     void fReadBuffer(GLenum mode) {
         BEFORE_GL_CALL;
         mSymbols.fReadBuffer(mode);
         AFTER_GL_CALL;
     }
 private:
     void raw_fReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels) {
         BEFORE_GL_CALL;
         mSymbols.fReadPixels(x, y, width, height, format, type, pixels);
         AFTER_GL_CALL;
     }
 public:
     void fReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid *pixels) {
         BeforeGLReadCall();
         bool didReadPixels = false;
         if (mScreen) {
             didReadPixels = mScreen->ReadPixels(x, y, width, height, format, type, pixels);
         }
         if (!didReadPixels) {
             raw_fReadPixels(x, y, width, height, format, type, pixels);
         }
         AfterGLReadCall();
     }
 public:
     void fSampleCoverage(GLclampf value, realGLboolean invert) {
         BEFORE_GL_CALL;
         mSymbols.fSampleCoverage(value, invert);
         AFTER_GL_CALL;
     }
     void fScissor(GLint x, GLint y, GLsizei width, GLsizei height) {
         if (mScissorRect[0] == x &&
             mScissorRect[1] == y &&
             mScissorRect[2] == width &&
             mScissorRect[3] == height)
         {
             return;
         }
         mScissorRect[0] = x;
         mScissorRect[1] = y;
         mScissorRect[2] = width;
         mScissorRect[3] = height;
         BEFORE_GL_CALL;
         mSymbols.fScissor(x, y, width, height);
         AFTER_GL_CALL;
     }
     void fStencilFunc(GLenum func, GLint ref, GLuint mask) {
         BEFORE_GL_CALL;
         mSymbols.fStencilFunc(func, ref, mask);
         AFTER_GL_CALL;
     }
     void fStencilFuncSeparate(GLenum frontfunc, GLenum backfunc, GLint ref, GLuint mask) {
         BEFORE_GL_CALL;
         mSymbols.fStencilFuncSeparate(frontfunc, backfunc, ref, mask);
         AFTER_GL_CALL;
     }
     void fStencilMask(GLuint mask) {
         BEFORE_GL_CALL;
         mSymbols.fStencilMask(mask);
         AFTER_GL_CALL;
     }
     void fStencilMaskSeparate(GLenum face, GLuint mask) {
         BEFORE_GL_CALL;
         mSymbols.fStencilMaskSeparate(face, mask);
         AFTER_GL_CALL;
     }
     void fStencilOp(GLenum fail, GLenum zfail, GLenum zpass) {
         BEFORE_GL_CALL;
         mSymbols.fStencilOp(fail, zfail, zpass);
         AFTER_GL_CALL;
     }
     void fStencilOpSeparate(GLenum face, GLenum sfail, GLenum dpfail, GLenum dppass) {
         BEFORE_GL_CALL;
         mSymbols.fStencilOpSeparate(face, sfail, dpfail, dppass);
         AFTER_GL_CALL;
     }
     void fTexGeni(GLenum coord, GLenum pname, GLint param) {
         BEFORE_GL_CALL;
         mSymbols.fTexGeni(coord, pname, param);
         AFTER_GL_CALL;
     }
     void fTexGenf(GLenum coord, GLenum pname, GLfloat param) {
         BEFORE_GL_CALL;
         mSymbols.fTexGenf(coord, pname, param);
         AFTER_GL_CALL;
     }
     void fTexGenfv(GLenum coord, GLenum pname, const GLfloat *params) {
         BEFORE_GL_CALL;
         mSymbols.fTexGenfv(coord, pname, params);
         AFTER_GL_CALL;
     }
 private:
     void raw_fTexImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels) {
         BEFORE_GL_CALL;
         mSymbols.fTexImage2D(target, level, internalformat, width, height, border, format, type, pixels);
         AFTER_GL_CALL;
     }
 public:
     void fTexImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height, GLint border, GLenum format, GLenum type, const GLvoid *pixels) {
         if (!IsTextureSizeSafeToPassToDriver(target, width, height)) {
             // pass wrong values to cause the GL to generate GL_INVALID_VALUE.
             // See bug 737182 and the comment in IsTextureSizeSafeToPassToDriver.
             level = -1;
             width = -1;
             height = -1;
             border = -1;
         }
         raw_fTexImage2D(target, level, internalformat, width, height, border, format, type, pixels);
     }
     void fTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid* pixels) {
         BEFORE_GL_CALL;
         mSymbols.fTexSubImage2D(target, level, xoffset, yoffset, width, height, format, type, pixels);
         AFTER_GL_CALL;
     }
     void fUniform1f(GLint location, GLfloat v0) {
         BEFORE_GL_CALL;
         mSymbols.fUniform1f(location, v0);
         AFTER_GL_CALL;
     }
     void fUniform1fv(GLint location, GLsizei count, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform1fv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform1i(GLint location, GLint v0) {
         BEFORE_GL_CALL;
         mSymbols.fUniform1i(location, v0);
         AFTER_GL_CALL;
     }
     void fUniform1iv(GLint location, GLsizei count, const GLint* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform1iv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform2f(GLint location, GLfloat v0, GLfloat v1) {
         BEFORE_GL_CALL;
         mSymbols.fUniform2f(location, v0, v1);
         AFTER_GL_CALL;
     }
     void fUniform2fv(GLint location, GLsizei count, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform2fv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform2i(GLint location, GLint v0, GLint v1) {
         BEFORE_GL_CALL;
         mSymbols.fUniform2i(location, v0, v1);
         AFTER_GL_CALL;
     }
     void fUniform2iv(GLint location, GLsizei count, const GLint* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform2iv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform3f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2) {
         BEFORE_GL_CALL;
         mSymbols.fUniform3f(location, v0, v1, v2);
         AFTER_GL_CALL;
     }
     void fUniform3fv(GLint location, GLsizei count, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform3fv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform3i(GLint location, GLint v0, GLint v1, GLint v2) {
         BEFORE_GL_CALL;
         mSymbols.fUniform3i(location, v0, v1, v2);
         AFTER_GL_CALL;
     }
     void fUniform3iv(GLint location, GLsizei count, const GLint* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform3iv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform4f(GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3) {
         BEFORE_GL_CALL;
         mSymbols.fUniform4f(location, v0, v1, v2, v3);
         AFTER_GL_CALL;
     }
     void fUniform4fv(GLint location, GLsizei count, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform4fv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniform4i(GLint location, GLint v0, GLint v1, GLint v2, GLint v3) {
         BEFORE_GL_CALL;
         mSymbols.fUniform4i(location, v0, v1, v2, v3);
         AFTER_GL_CALL;
     }
     void fUniform4iv(GLint location, GLsizei count, const GLint* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniform4iv(location, count, value);
         AFTER_GL_CALL;
     }
     void fUniformMatrix2fv(GLint location, GLsizei count, realGLboolean transpose, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniformMatrix2fv(location, count, transpose, value);
         AFTER_GL_CALL;
     }
     void fUniformMatrix3fv(GLint location, GLsizei count, realGLboolean transpose, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniformMatrix3fv(location, count, transpose, value);
         AFTER_GL_CALL;
     }
     void fUniformMatrix4fv(GLint location, GLsizei count, realGLboolean transpose, const GLfloat* value) {
         BEFORE_GL_CALL;
         mSymbols.fUniformMatrix4fv(location, count, transpose, value);
         AFTER_GL_CALL;
     }
     void fUseProgram(GLuint program) {
         BEFORE_GL_CALL;
         mSymbols.fUseProgram(program);
         AFTER_GL_CALL;
     }
     void fValidateProgram(GLuint program) {
         BEFORE_GL_CALL;
         mSymbols.fValidateProgram(program);
         AFTER_GL_CALL;
     }
     void fVertexAttribPointer(GLuint index, GLint size, GLenum type, realGLboolean normalized, GLsizei stride, const GLvoid* pointer) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttribPointer(index, size, type, normalized, stride, pointer);
         AFTER_GL_CALL;
     }
     void fVertexAttrib1f(GLuint index, GLfloat x) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib1f(index, x);
         AFTER_GL_CALL;
     }
     void fVertexAttrib2f(GLuint index, GLfloat x, GLfloat y) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib2f(index, x, y);
         AFTER_GL_CALL;
     }
     void fVertexAttrib3f(GLuint index, GLfloat x, GLfloat y, GLfloat z) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib3f(index, x, y, z);
         AFTER_GL_CALL;
     }
     void fVertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib4f(index, x, y, z, w);
         AFTER_GL_CALL;
     }
     void fVertexAttrib1fv(GLuint index, const GLfloat* v) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib1fv(index, v);
         AFTER_GL_CALL;
     }
     void fVertexAttrib2fv(GLuint index, const GLfloat* v) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib2fv(index, v);
         AFTER_GL_CALL;
     }
     void fVertexAttrib3fv(GLuint index, const GLfloat* v) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib3fv(index, v);
         AFTER_GL_CALL;
     }
     void fVertexAttrib4fv(GLuint index, const GLfloat* v) {
         BEFORE_GL_CALL;
         mSymbols.fVertexAttrib4fv(index, v);
         AFTER_GL_CALL;
     }
     void fVertexPointer(GLint size, GLenum type, GLsizei stride, const GLvoid* pointer) {
         BEFORE_GL_CALL;
         mSymbols.fVertexPointer(size, type, stride, pointer);
         AFTER_GL_CALL;
     }
     void fCompileShader(GLuint shader) {
         BEFORE_GL_CALL;
         mSymbols.fCompileShader(shader);
         AFTER_GL_CALL;
     }
 private:
     void raw_fCopyTexImage2D(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border) {
         BEFORE_GL_CALL;
         mSymbols.fCopyTexImage2D(target, level, internalformat, x, y, width, height, border);
         AFTER_GL_CALL;
     }
     void raw_fCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height) {
         BEFORE_GL_CALL;
         mSymbols.fCopyTexSubImage2D(target, level, xoffset, yoffset, x, y, width, height);
         AFTER_GL_CALL;
     }
 public:
     void fGetShaderiv(GLuint shader, GLenum pname, GLint* param) {
         BEFORE_GL_CALL;
         mSymbols.fGetShaderiv(shader, pname, param);
         AFTER_GL_CALL;
     }
     void fGetShaderInfoLog(GLuint shader, GLsizei bufSize, GLsizei* length, GLchar* infoLog) {
         BEFORE_GL_CALL;
         mSymbols.fGetShaderInfoLog(shader, bufSize, length, infoLog);
         AFTER_GL_CALL;
     }
 private:
     void raw_fGetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision) {
         MOZ_ASSERT(IsGLES());
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetShaderPrecisionFormat);
         mSymbols.fGetShaderPrecisionFormat(shadertype, precisiontype, range, precision);
         AFTER_GL_CALL;
     }
 public:
     void fGetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision) {
         if (IsGLES()) {
             raw_fGetShaderPrecisionFormat(shadertype, precisiontype, range, precision);
         } else {
             // Fall back to automatic values because almost all desktop hardware supports the OpenGL standard precisions.
             GetShaderPrecisionFormatNonES2(shadertype, precisiontype, range, precision);
         }
     }
     void fGetShaderSource(GLint obj, GLsizei maxLength, GLsizei* length, GLchar* source) {
         BEFORE_GL_CALL;
         mSymbols.fGetShaderSource(obj, maxLength, length, source);
         AFTER_GL_CALL;
     }
     void fShaderSource(GLuint shader, GLsizei count, const GLchar** strings, const GLint* lengths) {
         BEFORE_GL_CALL;
         mSymbols.fShaderSource(shader, count, strings, lengths);
         AFTER_GL_CALL;
     }
 private:
     void raw_fBindFramebuffer(GLenum target, GLuint framebuffer) {
         BEFORE_GL_CALL;
         mSymbols.fBindFramebuffer(target, framebuffer);
         AFTER_GL_CALL;
     }
 public:
     void fBindRenderbuffer(GLenum target, GLuint renderbuffer) {
         BEFORE_GL_CALL;
         mSymbols.fBindRenderbuffer(target, renderbuffer);
         AFTER_GL_CALL;
     }
     GLenum fCheckFramebufferStatus(GLenum target) {
         BEFORE_GL_CALL;
         GLenum retval = mSymbols.fCheckFramebufferStatus(target);
         AFTER_GL_CALL;
         return retval;
     }
     void fFramebufferRenderbuffer(GLenum target, GLenum attachmentPoint, GLenum renderbufferTarget, GLuint renderbuffer) {
         BEFORE_GL_CALL;
         mSymbols.fFramebufferRenderbuffer(target, attachmentPoint, renderbufferTarget, renderbuffer);
         AFTER_GL_CALL;
     }
     void fFramebufferTexture2D(GLenum target, GLenum attachmentPoint, GLenum textureTarget, GLuint texture, GLint level) {
         BEFORE_GL_CALL;
         mSymbols.fFramebufferTexture2D(target, attachmentPoint, textureTarget, texture, level);
         AFTER_GL_CALL;
     }
     void fGetFramebufferAttachmentParameteriv(GLenum target, GLenum attachment, GLenum pname, GLint* value) {
         BEFORE_GL_CALL;
         mSymbols.fGetFramebufferAttachmentParameteriv(target, attachment, pname, value);
         AFTER_GL_CALL;
     }
     void fGetRenderbufferParameteriv(GLenum target, GLenum pname, GLint* value) {
         BEFORE_GL_CALL;
         mSymbols.fGetRenderbufferParameteriv(target, pname, value);
         AFTER_GL_CALL;
     }
     realGLboolean fIsFramebuffer (GLuint framebuffer) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsFramebuffer(framebuffer);
         AFTER_GL_CALL;
         return retval;
     }
 public:
     realGLboolean fIsRenderbuffer (GLuint renderbuffer) {
         BEFORE_GL_CALL;
         realGLboolean retval = mSymbols.fIsRenderbuffer(renderbuffer);
         AFTER_GL_CALL;
         return retval;
     }
     void fRenderbufferStorage(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height) {
         BEFORE_GL_CALL;
         mSymbols.fRenderbufferStorage(target, internalFormat, width, height);
         AFTER_GL_CALL;
     }
 private:
     void raw_fDepthRange(GLclampf a, GLclampf b) {
         MOZ_ASSERT(!IsGLES());
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDepthRange);
         mSymbols.fDepthRange(a, b);
         AFTER_GL_CALL;
     }
     void raw_fDepthRangef(GLclampf a, GLclampf b) {
         MOZ_ASSERT(IsGLES());
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDepthRangef);
         mSymbols.fDepthRangef(a, b);
         AFTER_GL_CALL;
     }
     void raw_fClearDepth(GLclampf v) {
         MOZ_ASSERT(!IsGLES());
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fClearDepth);
         mSymbols.fClearDepth(v);
         AFTER_GL_CALL;
     }
     void raw_fClearDepthf(GLclampf v) {
         MOZ_ASSERT(IsGLES());
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fClearDepthf);
         mSymbols.fClearDepthf(v);
         AFTER_GL_CALL;
     }
 public:
     void fDepthRange(GLclampf a, GLclampf b) {
         if (IsGLES()) {
             raw_fDepthRangef(a, b);
         } else {
             raw_fDepthRange(a, b);
         }
     }
     void fClearDepth(GLclampf v) {
         if (IsGLES()) {
             raw_fClearDepthf(v);
         } else {
             raw_fClearDepth(v);
         }
     }
     void* fMapBuffer(GLenum target, GLenum access) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fMapBuffer);
         void *ret = mSymbols.fMapBuffer(target, access);
         AFTER_GL_CALL;
         return ret;
     }
     realGLboolean fUnmapBuffer(GLenum target) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fUnmapBuffer);
         realGLboolean ret = mSymbols.fUnmapBuffer(target);
         AFTER_GL_CALL;
         return ret;
     }
 private:
     GLuint raw_fCreateProgram() {
         BEFORE_GL_CALL;
         GLuint ret = mSymbols.fCreateProgram();
         AFTER_GL_CALL;
         return ret;
     }
     GLuint raw_fCreateShader(GLenum t) {
         BEFORE_GL_CALL;
         GLuint ret = mSymbols.fCreateShader(t);
         AFTER_GL_CALL;
         return ret;
     }
     void raw_fGenBuffers(GLsizei n, GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fGenBuffers(n, names);
         AFTER_GL_CALL;
     }
     void raw_fGenFramebuffers(GLsizei n, GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fGenFramebuffers(n, names);
         AFTER_GL_CALL;
     }
     void raw_fGenRenderbuffers(GLsizei n, GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fGenRenderbuffers(n, names);
         AFTER_GL_CALL;
     }
     void raw_fGenTextures(GLsizei n, GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fGenTextures(n, names);
         AFTER_GL_CALL;
     }
 public:
     GLuint fCreateProgram() {
         GLuint ret = raw_fCreateProgram();
         TRACKING_CONTEXT(CreatedProgram(this, ret));
         return ret;
     }
     GLuint fCreateShader(GLenum t) {
         GLuint ret = raw_fCreateShader(t);
         TRACKING_CONTEXT(CreatedShader(this, ret));
         return ret;
     }
     void fGenBuffers(GLsizei n, GLuint* names) {
         raw_fGenBuffers(n, names);
         TRACKING_CONTEXT(CreatedBuffers(this, n, names));
     }
     void fGenFramebuffers(GLsizei n, GLuint* names) {
         raw_fGenFramebuffers(n, names);
         TRACKING_CONTEXT(CreatedFramebuffers(this, n, names));
     }
     void fGenRenderbuffers(GLsizei n, GLuint* names) {
         raw_fGenRenderbuffers(n, names);
         TRACKING_CONTEXT(CreatedRenderbuffers(this, n, names));
     }
     void fGenTextures(GLsizei n, GLuint* names) {
         raw_fGenTextures(n, names);
         TRACKING_CONTEXT(CreatedTextures(this, n, names));
     }
 private:
     void raw_fDeleteProgram(GLuint program) {
         BEFORE_GL_CALL;
         mSymbols.fDeleteProgram(program);
         AFTER_GL_CALL;
     }
     void raw_fDeleteShader(GLuint shader) {
         BEFORE_GL_CALL;
         mSymbols.fDeleteShader(shader);
         AFTER_GL_CALL;
     }
     void raw_fDeleteBuffers(GLsizei n, const GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fDeleteBuffers(n, names);
         AFTER_GL_CALL;
     }
     void raw_fDeleteFramebuffers(GLsizei n, const GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fDeleteFramebuffers(n, names);
         AFTER_GL_CALL;
     }
     void raw_fDeleteRenderbuffers(GLsizei n, const GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fDeleteRenderbuffers(n, names);
         AFTER_GL_CALL;
     }
     void raw_fDeleteTextures(GLsizei n, const GLuint* names) {
         BEFORE_GL_CALL;
         mSymbols.fDeleteTextures(n, names);
         AFTER_GL_CALL;
     }
 public:
     void fDeleteProgram(GLuint program) {
         raw_fDeleteProgram(program);
         TRACKING_CONTEXT(DeletedProgram(this, program));
     }
     void fDeleteShader(GLuint shader) {
         raw_fDeleteShader(shader);
         TRACKING_CONTEXT(DeletedShader(this, shader));
     }
     void fDeleteBuffers(GLsizei n, const GLuint* names) {
         raw_fDeleteBuffers(n, names);
         TRACKING_CONTEXT(DeletedBuffers(this, n, names));
     }
     void fDeleteFramebuffers(GLsizei n, const GLuint* names) {
         if (mScreen) {
             // Notify mScreen which framebuffers we're deleting.
             // Otherwise, we will get framebuffer binding mispredictions.
             for (int i = 0; i < n; i++) {
                 mScreen->DeletingFB(names[i]);
             }
         }
         if (n == 1 && *names == 0) {
             // Deleting framebuffer 0 causes hangs on the DROID. See bug 623228.
         } else {
             raw_fDeleteFramebuffers(n, names);
         }
         TRACKING_CONTEXT(DeletedFramebuffers(this, n, names));
     }
     void fDeleteRenderbuffers(GLsizei n, const GLuint* names) {
         raw_fDeleteRenderbuffers(n, names);
         TRACKING_CONTEXT(DeletedRenderbuffers(this, n, names));
     }
     void fDeleteTextures(GLsizei n, const GLuint* names) {
         raw_fDeleteTextures(n, names);
         TRACKING_CONTEXT(DeletedTextures(this, n, names));
     }
     GLenum fGetGraphicsResetStatus() {
         MOZ_ASSERT(mHasRobustness);
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetGraphicsResetStatus);
         GLenum ret = mSymbols.fGetGraphicsResetStatus();
         AFTER_GL_CALL;
         return ret;
     }
 // -----------------------------------------------------------------------------
 // Extension ARB_sync (GL)
 public:
     GLsync fFenceSync(GLenum condition, GLbitfield flags) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fFenceSync);
         GLsync ret = mSymbols.fFenceSync(condition, flags);
         AFTER_GL_CALL;
         return ret;
     }
     realGLboolean fIsSync(GLsync sync) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fIsSync);
         realGLboolean ret = mSymbols.fIsSync(sync);
         AFTER_GL_CALL;
         return ret;
     }
     void fDeleteSync(GLsync sync) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDeleteSync);
         mSymbols.fDeleteSync(sync);
         AFTER_GL_CALL;
     }
     GLenum fClientWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fClientWaitSync);
         GLenum ret = mSymbols.fClientWaitSync(sync, flags, timeout);
         AFTER_GL_CALL;
         return ret;
     }
     void fWaitSync(GLsync sync, GLbitfield flags, GLuint64 timeout) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fWaitSync);
         mSymbols.fWaitSync(sync, flags, timeout);
         AFTER_GL_CALL;
     }
     void fGetInteger64v(GLenum pname, GLint64 *params) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetInteger64v);
         mSymbols.fGetInteger64v(pname, params);
         AFTER_GL_CALL;
     }
     void fGetSynciv(GLsync sync, GLenum pname, GLsizei bufSize, GLsizei *length, GLint *values) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetSynciv);
         mSymbols.fGetSynciv(sync, pname, bufSize, length, values);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Extension OES_EGL_image (GLES)
 public:
     void fEGLImageTargetTexture2D(GLenum target, GLeglImage image) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fEGLImageTargetTexture2D);
         mSymbols.fEGLImageTargetTexture2D(target, image);
         AFTER_GL_CALL;
     }
     void fEGLImageTargetRenderbufferStorage(GLenum target, GLeglImage image)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fEGLImageTargetRenderbufferStorage);
         mSymbols.fEGLImageTargetRenderbufferStorage(target, image);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_bind_buffer_offset
 public:
     void fBindBufferOffset(GLenum target, GLuint index, GLuint buffer, GLintptr offset)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBindBufferOffset);
         mSymbols.fBindBufferOffset(target, index, buffer, offset);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_draw_buffers
 public:
     void fDrawBuffers(GLsizei n, const GLenum* bufs) {
         BEFORE_GL_CALL;
         mSymbols.fDrawBuffers(n, bufs);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_draw_instanced
 public:
     void fDrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount)
     {
         BeforeGLDrawCall();
         raw_fDrawArraysInstanced(mode, first, count, primcount);
         AfterGLDrawCall();
     }
     void fDrawElementsInstanced(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices, GLsizei primcount)
     {
         BeforeGLDrawCall();
         raw_fDrawElementsInstanced(mode, count, type, indices, primcount);
         AfterGLDrawCall();
     }
 private:
     void raw_fDrawArraysInstanced(GLenum mode, GLint first, GLsizei count, GLsizei primcount)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDrawArraysInstanced);
         mSymbols.fDrawArraysInstanced(mode, first, count, primcount);
         AFTER_GL_CALL;
     }
     void raw_fDrawElementsInstanced(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices, GLsizei primcount)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDrawElementsInstanced);
         mSymbols.fDrawElementsInstanced(mode, count, type, indices, primcount);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Feature draw_range_elements
 public:
     void fDrawRangeElements(GLenum mode, GLuint start, GLuint end,
                             GLsizei count, GLenum type, const GLvoid* indices)
     {
         BeforeGLDrawCall();
         raw_fDrawRangeElements(mode, start, end, count, type, indices);
         AfterGLDrawCall();
     }
 private:
     void raw_fDrawRangeElements(GLenum mode, GLuint start, GLuint end,
                                 GLsizei count, GLenum type, const GLvoid* indices)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDrawRangeElements);
         mSymbols.fDrawRangeElements(mode, start, end, count, type, indices);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_framebuffer_blit
 public:
     // Draw/Read
     void fBlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) {
         BeforeGLDrawCall();
         BeforeGLReadCall();
         raw_fBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
         AfterGLReadCall();
         AfterGLDrawCall();
     }
 private:
     void raw_fBlitFramebuffer(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBlitFramebuffer);
         mSymbols.fBlitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask, filter);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_framebuffer_multisample
 public:
     void fRenderbufferStorageMultisample(GLenum target, GLsizei samples, GLenum internalFormat, GLsizei width, GLsizei height) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fRenderbufferStorageMultisample);
         mSymbols.fRenderbufferStorageMultisample(target, samples, internalFormat, width, height);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_instanced_arrays
 public:
     void fVertexAttribDivisor(GLuint index, GLuint divisor)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fVertexAttribDivisor);
         mSymbols.fVertexAttribDivisor(index, divisor);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_query_objects
 /**
  * XXX_query_objects:
  *  - provide all followed entry points
  *
  * XXX_occlusion_query2:
  *  - depends on XXX_query_objects
  *  - provide ANY_SAMPLES_PASSED
  *
  * XXX_occlusion_query_boolean:
  *  - depends on XXX_occlusion_query2
  *  - provide ANY_SAMPLES_PASSED_CONSERVATIVE
  */
 public:
     void fDeleteQueries(GLsizei n, const GLuint* names) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDeleteQueries);
         mSymbols.fDeleteQueries(n, names);
         AFTER_GL_CALL;
         TRACKING_CONTEXT(DeletedQueries(this, n, names));
     }
     void fGenQueries(GLsizei n, GLuint* names) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGenQueries);
         mSymbols.fGenQueries(n, names);
         AFTER_GL_CALL;
         TRACKING_CONTEXT(CreatedQueries(this, n, names));
     }
     void fGetQueryiv(GLenum target, GLenum pname, GLint* params) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetQueryiv);
         mSymbols.fGetQueryiv(target, pname, params);
         AFTER_GL_CALL;
     }
     void fGetQueryObjectuiv(GLuint id, GLenum pname, GLuint* params) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetQueryObjectuiv);
         mSymbols.fGetQueryObjectuiv(id, pname, params);
         AFTER_GL_CALL;
     }
     realGLboolean fIsQuery(GLuint query) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fIsQuery);
         realGLboolean retval = mSymbols.fIsQuery(query);
         AFTER_GL_CALL;
         return retval;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_get_query_object_iv
 /**
  * XXX_get_query_object_iv:
  *  - depends on XXX_query_objects
  *  - provide the followed entry point
  *
  * XXX_occlusion_query:
  *  - depends on XXX_get_query_object_iv
  *  - provide LOCAL_GL_SAMPLES_PASSED
  */
 public:
     void fGetQueryObjectiv(GLuint id, GLenum pname, GLint* params) {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetQueryObjectiv);
         mSymbols.fGetQueryObjectiv(id, pname, params);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_transform_feedback
 public:
     void fBindBufferBase(GLenum target, GLuint index, GLuint buffer)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBindBufferBase);
         mSymbols.fBindBufferBase(target, index, buffer);
         AFTER_GL_CALL;
     }
     void fBindBufferRange(GLenum target, GLuint index, GLuint buffer, GLintptr offset, GLsizeiptr size)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBindBufferRange);
         mSymbols.fBindBufferRange(target, index, buffer, offset, size);
         AFTER_GL_CALL;
     }
     void fBeginTransformFeedback(GLenum primitiveMode)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBeginTransformFeedback);
         mSymbols.fBeginTransformFeedback(primitiveMode);
         AFTER_GL_CALL;
     }
     void fEndTransformFeedback()
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fEndTransformFeedback);
         mSymbols.fEndTransformFeedback();
         AFTER_GL_CALL;
     }
     void fTransformFeedbackVaryings(GLuint program, GLsizei count, const GLchar* const* varyings, GLenum bufferMode)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fTransformFeedbackVaryings);
         mSymbols.fTransformFeedbackVaryings(program, count, varyings, bufferMode);
         AFTER_GL_CALL;
     }
     void fGetTransformFeedbackVarying(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLsizei* size, GLenum* type, GLchar* name)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetTransformFeedbackVarying);
         mSymbols.fGetTransformFeedbackVarying(program, index, bufSize, length, size, type, name);
         AFTER_GL_CALL;
     }
     void fGetIntegeri_v(GLenum param, GLuint index, GLint* values)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGetIntegeri_v);
         mSymbols.fGetIntegeri_v(param, index, values);
         AFTER_GL_CALL;
     }
 // -----------------------------------------------------------------------------
 // Package XXX_vertex_array_object
 public:
     void fBindVertexArray(GLuint array)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fBindVertexArray);
         mSymbols.fBindVertexArray(array);
         AFTER_GL_CALL;
     }
     void fDeleteVertexArrays(GLsizei n, const GLuint *arrays)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fDeleteVertexArrays);
         mSymbols.fDeleteVertexArrays(n, arrays);
         AFTER_GL_CALL;
     }
     void fGenVertexArrays(GLsizei n, GLuint *arrays)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fGenVertexArrays);
         mSymbols.fGenVertexArrays(n, arrays);
         AFTER_GL_CALL;
     }
     realGLboolean fIsVertexArray(GLuint array)
     {
         BEFORE_GL_CALL;
         ASSERT_SYMBOL_PRESENT(fIsVertexArray);
         realGLboolean ret = mSymbols.fIsVertexArray(array);
         AFTER_GL_CALL;
         return ret;
     }
 // -----------------------------------------------------------------------------
 // Constructor
 public:
     typedef struct gfx::SurfaceCaps SurfaceCaps;
 protected:
     GLContext(const SurfaceCaps& caps,
               GLContext* sharedContext = nullptr,
               bool isOffscreen = false);
 // -----------------------------------------------------------------------------
 // Destructor
 public:
     virtual ~GLContext();
 // -----------------------------------------------------------------------------
 // Everything that isn't standard GL APIs
 protected:
     typedef class gfx::SharedSurface SharedSurface;
     typedef gfx::SharedSurfaceType SharedSurfaceType;
     typedef gfx::SurfaceFormat SurfaceFormat;
     virtual bool MakeCurrentImpl(bool aForce) = 0;
 public:
 #ifdef MOZ_ENABLE_GL_TRACKING
     static void StaticInit() {
         PR_NewThreadPrivateIndex(&sCurrentGLContextTLS, nullptr);
     }
 #endif
     bool MakeCurrent(bool aForce = false) {
         if (IsDestroyed()) {
             return false;
         }
 #ifdef MOZ_ENABLE_GL_TRACKING
     PR_SetThreadPrivate(sCurrentGLContextTLS, this);
     // XXX this assertion is disabled because it's triggering on Mac;
     // we need to figure out why and reenable it.
 #if 0
         // IsOwningThreadCurrent is a bit of a misnomer;
         // the "owning thread" is the creation thread,
         // and the only thread that can own this.  We don't
         // support contexts used on multiple threads.
         NS_ASSERTION(IsOwningThreadCurrent(),
                      "MakeCurrent() called on different thread than this context was created on!");
 #endif
 #endif
         return MakeCurrentImpl(aForce);
     }
     virtual bool Init() = 0;
     virtual bool SetupLookupFunction() = 0;
     virtual void ReleaseSurface() {}
     // Mark this context as destroyed.  This will nullptr out all
     // the GL function pointers!
     void MarkDestroyed();
     bool IsDestroyed() {
         // MarkDestroyed will mark all these as null.
         return mSymbols.fUseProgram == nullptr;
     }
     GLContext *GetSharedContext() { return mSharedContext; }
     /**
      * Returns true if the thread on which this context was created is the currently
      * executing thread.
      */
     bool IsOwningThreadCurrent();
     void DispatchToOwningThread(nsIRunnable *event);
     static void PlatformStartup();
 public:
     /**
      * If this context wraps a double-buffered target, swap the back
      * and front buffers.  It should be assumed that after a swap, the
      * contents of the new back buffer are undefined.
      */
     virtual bool SwapBuffers() { return false; }
     /**
      * Defines a two-dimensional texture image for context target surface
      */
     virtual bool BindTexImage() { return false; }
     /*
      * Releases a color buffer that is being used as a texture
      */
     virtual bool ReleaseTexImage() { return false; }
     // Before reads from offscreen texture
     void GuaranteeResolve();
     /*
      * Resize the current offscreen buffer.  Returns true on success.
      * If it returns false, the context should be treated as unusable
      * and should be recreated.  After the resize, the viewport is not
      * changed; glViewport should be called as appropriate.
      *
      * Only valid if IsOffscreen() returns true.
      */
     bool ResizeOffscreen(const gfx::IntSize& size) {
         return ResizeScreenBuffer(size);
     }
     /*
      * Return size of this offscreen context.
      *
      * Only valid if IsOffscreen() returns true.
      */
     const gfx::IntSize& OffscreenSize() const;
     void BindFB(GLuint fb) {
         fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, fb);
         MOZ_ASSERT(!fb || fIsFramebuffer(fb));
     }
     void BindDrawFB(GLuint fb) {
         fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER_EXT, fb);
     }
     void BindReadFB(GLuint fb) {
         fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, fb);
     }
     GLuint GetDrawFB() {
         if (mScreen)
             return mScreen->GetDrawFB();
         GLuint ret = 0;
         GetUIntegerv(LOCAL_GL_DRAW_FRAMEBUFFER_BINDING_EXT, &ret);
         return ret;
     }
     GLuint GetReadFB() {
         if (mScreen)
             return mScreen->GetReadFB();
         GLenum bindEnum = IsSupported(GLFeature::framebuffer_blit)
                             ? LOCAL_GL_READ_FRAMEBUFFER_BINDING_EXT
                             : LOCAL_GL_FRAMEBUFFER_BINDING;
         GLuint ret = 0;
         GetUIntegerv(bindEnum, &ret);
         return ret;
     }
     GLuint GetFB() {
         if (mScreen) {
             // This has a very important extra assert that checks that we're
             // not accidentally ignoring a situation where the draw and read
             // FBs differ.
             return mScreen->GetFB();
         }
         GLuint ret = 0;
         GetUIntegerv(LOCAL_GL_FRAMEBUFFER_BINDING, &ret);
         return ret;
     }
 private:
     void GetShaderPrecisionFormatNonES2(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision) {
         switch (precisiontype) {
             case LOCAL_GL_LOW_FLOAT:
             case LOCAL_GL_MEDIUM_FLOAT:
             case LOCAL_GL_HIGH_FLOAT:
                 // Assume IEEE 754 precision
                 range[0] = 127;
                 range[1] = 127;
                 *precision = 23;
                 break;
             case LOCAL_GL_LOW_INT:
             case LOCAL_GL_MEDIUM_INT:
             case LOCAL_GL_HIGH_INT:
                 // Some (most) hardware only supports single-precision floating-point numbers,
                 // which can accurately represent integers up to +/-16777216
                 range[0] = 24;
                 range[1] = 24;
                 *precision = 0;
                 break;
         }
     }
 public:
     void ForceDirtyScreen();
     void CleanDirtyScreen();
     virtual GLenum GetPreferredARGB32Format() const { return LOCAL_GL_RGBA; }
     virtual bool RenewSurface() { return false; }
     // Shared code for GL extensions and GLX extensions.
     static bool ListHasExtension(const GLubyte *extensions,
                                  const char *extension);
     GLint GetMaxTextureImageSize() { return mMaxTextureImageSize; }
 public:
     /**
      * Context reset constants.
      * These are used to determine who is guilty when a context reset
      * happens.
      */
     enum ContextResetARB {
         CONTEXT_NO_ERROR = 0,
         CONTEXT_GUILTY_CONTEXT_RESET_ARB = 0x8253,
         CONTEXT_INNOCENT_CONTEXT_RESET_ARB = 0x8254,
         CONTEXT_UNKNOWN_CONTEXT_RESET_ARB = 0x8255
     };
 public:
     std::map<GLuint, SharedSurface_GL*> mFBOMapping;
     enum {
         DebugEnabled = 1 << 0,
         DebugTrace = 1 << 1,
         DebugAbortOnError = 1 << 2
     };
     static uint32_t sDebugMode;
     static uint32_t DebugMode() {
 #ifdef DEBUG
         return sDebugMode;
 #else
         return 0;
 #endif
     }
 protected:
     nsRefPtr<GLContext> mSharedContext;
     // The thread on which this context was created.
     nsCOMPtr<nsIThread> mOwningThread;
     GLContextSymbols mSymbols;
 #ifdef DEBUG
     // GLDebugMode will check that we don't send call
     // to a GLContext that isn't current on the current
     // thread.
     // Store the current context when binding to thread local
     // storage to support DebugMode on an arbitrary thread.
     static unsigned sCurrentGLContextTLS;
 #endif
     ScopedDeletePtr<GLBlitHelper> mBlitHelper;
     ScopedDeletePtr<GLBlitTextureImageHelper> mBlitTextureImageHelper;
     ScopedDeletePtr<GLReadTexImageHelper> mReadTexImageHelper;
 public:
     GLBlitHelper* BlitHelper();
     GLBlitTextureImageHelper* BlitTextureImageHelper();
     GLReadTexImageHelper* ReadTexImageHelper();
     // Assumes shares are created by all sharing with the same global context.
     bool SharesWith(const GLContext* other) const {
         MOZ_ASSERT(!this->mSharedContext || !this->mSharedContext->mSharedContext);
         MOZ_ASSERT(!other->mSharedContext || !other->mSharedContext->mSharedContext);
         MOZ_ASSERT(!this->mSharedContext ||
                    !other->mSharedContext ||
                    this->mSharedContext == other->mSharedContext);
         const GLContext* thisShared = this->mSharedContext ? this->mSharedContext
                                                            : this;
         const GLContext* otherShared = other->mSharedContext ? other->mSharedContext
                                                              : other;
         return thisShared == otherShared;
     }
     bool InitOffscreen(const gfx::IntSize& size, const SurfaceCaps& caps) {
         if (!CreateScreenBuffer(size, caps))
             return false;
         MakeCurrent();
         fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, 0);
         fScissor(0, 0, size.width, size.height);
         fViewport(0, 0, size.width, size.height);
         mCaps = mScreen->Caps();
         if (mCaps.any)
             DetermineCaps();
         UpdateGLFormats(mCaps);
         UpdatePixelFormat();
         return true;
     }
 protected:
     // Note that it does -not- clear the resized buffers.
     bool CreateScreenBuffer(const gfx::IntSize& size, const SurfaceCaps& caps) {
         if (!IsOffscreenSizeAllowed(size))
             return false;
         SurfaceCaps tryCaps = caps;
         if (tryCaps.antialias) {
             // AA path
             if (CreateScreenBufferImpl(size, tryCaps))
                 return true;
             NS_WARNING("CreateScreenBuffer failed to initialize an AA context! Falling back to no AA...");
             tryCaps.antialias = false;
         }
         MOZ_ASSERT(!tryCaps.antialias);
         if (CreateScreenBufferImpl(size, tryCaps))
             return true;
         NS_WARNING("CreateScreenBuffer failed to initialize non-AA context!");
         return false;
     }
     bool CreateScreenBufferImpl(const gfx::IntSize& size,
                                 const SurfaceCaps& caps);
 public:
     bool ResizeScreenBuffer(const gfx::IntSize& size);
 protected:
     SurfaceCaps mCaps;
     nsAutoPtr<GLFormats> mGLFormats;
     nsAutoPtr<PixelBufferFormat> mPixelFormat;
 public:
     void DetermineCaps();
     const SurfaceCaps& Caps() const {
         return mCaps;
     }
     // Only varies based on bpp16 and alpha.
     GLFormats ChooseGLFormats(const SurfaceCaps& caps) const;
     void UpdateGLFormats(const SurfaceCaps& caps) {
         mGLFormats = new GLFormats(ChooseGLFormats(caps));
     }
     const GLFormats& GetGLFormats() const {
         MOZ_ASSERT(mGLFormats);
         return *mGLFormats;
     }
     PixelBufferFormat QueryPixelFormat();
     void UpdatePixelFormat();
     const PixelBufferFormat& GetPixelFormat() const {
         MOZ_ASSERT(mPixelFormat);
         return *mPixelFormat;
     }
     bool IsFramebufferComplete(GLuint fb, GLenum* status = nullptr);
     // Does not check completeness.
     void AttachBuffersToFB(GLuint colorTex, GLuint colorRB,
                            GLuint depthRB, GLuint stencilRB,
                            GLuint fb, GLenum target = LOCAL_GL_TEXTURE_2D);
     // Passing null is fine if the value you'd get is 0.
     bool AssembleOffscreenFBs(const GLuint colorMSRB,
                               const GLuint depthRB,
                               const GLuint stencilRB,
                               const GLuint texture,
                               GLuint* drawFB,
                               GLuint* readFB);
 protected:
     friend class GLScreenBuffer;
     GLScreenBuffer* mScreen;
     void DestroyScreenBuffer();
     SharedSurface_GL* mLockedSurface;
 public:
     void LockSurface(SharedSurface_GL* surf) {
         MOZ_ASSERT(!mLockedSurface);
         mLockedSurface = surf;
     }
     void UnlockSurface(SharedSurface_GL* surf) {
         MOZ_ASSERT(mLockedSurface == surf);
         mLockedSurface = nullptr;
     }
     SharedSurface_GL* GetLockedSurface() const {
         return mLockedSurface;
     }
     bool IsOffscreen() const {
         return mScreen;
     }
     GLScreenBuffer* Screen() const {
         return mScreen;
     }
     bool PublishFrame();
     SharedSurface_GL* RequestFrame();
     /* Clear to transparent black, with 0 depth and stencil,
      * while preserving current ClearColor etc. values.
      * Useful for resizing offscreen buffers.
      */
     void ClearSafely();
     bool WorkAroundDriverBugs() const { return mWorkAroundDriverBugs; }
 protected:
     nsRefPtr<TextureGarbageBin> mTexGarbageBin;
 public:
     TextureGarbageBin* TexGarbageBin() {
         MOZ_ASSERT(mTexGarbageBin);
         return mTexGarbageBin;
     }
     void EmptyTexGarbageBin();
     bool IsOffscreenSizeAllowed(const gfx::IntSize& aSize) const;
 protected:
     bool InitWithPrefix(const char *prefix, bool trygl);
     void InitExtensions();
     GLint mViewportRect[4];
     GLint mScissorRect[4];
     GLint mMaxTextureSize;
     GLint mMaxCubeMapTextureSize;
     GLint mMaxTextureImageSize;
     GLint mMaxRenderbufferSize;
     GLsizei mMaxSamples;
     bool mNeedsTextureSizeChecks;
     bool mWorkAroundDriverBugs;
     bool IsTextureSizeSafeToPassToDriver(GLenum target, GLsizei width, GLsizei height) const {
         if (mNeedsTextureSizeChecks) {
             // some drivers incorrectly handle some large texture sizes that are below the
             // max texture size that they report. So we check ourselves against our own values
             // (mMax[CubeMap]TextureSize).
             // see bug 737182 for Mac Intel 2D textures
             // see bug 684882 for Mac Intel cube map textures
             // see bug 814716 for Mesa Nouveau
             GLsizei maxSize = target == LOCAL_GL_TEXTURE_CUBE_MAP ||
                                 (target >= LOCAL_GL_TEXTURE_CUBE_MAP_POSITIVE_X &&
                                 target <= LOCAL_GL_TEXTURE_CUBE_MAP_NEGATIVE_Z)
                               ? mMaxCubeMapTextureSize
                               : mMaxTextureSize;
             return width <= maxSize && height <= maxSize;
         }
         return true;
     }
 public:
     void fViewport(GLint x, GLint y, GLsizei width, GLsizei height) {
         if (mViewportRect[0] == x &&
             mViewportRect[1] == y &&
             mViewportRect[2] == width &&
             mViewportRect[3] == height)
         {
             return;
         }
         mViewportRect[0] = x;
         mViewportRect[1] = y;
         mViewportRect[2] = width;
         mViewportRect[3] = height;
         BEFORE_GL_CALL;
         mSymbols.fViewport(x, y, width, height);
         AFTER_GL_CALL;
     }
 #undef ASSERT_SYMBOL_PRESENT
 #ifdef MOZ_ENABLE_GL_TRACKING
     void CreatedProgram(GLContext *aOrigin, GLuint aName);
     void CreatedShader(GLContext *aOrigin, GLuint aName);
     void CreatedBuffers(GLContext *aOrigin, GLsizei aCount, GLuint *aNames);
     void CreatedQueries(GLContext *aOrigin, GLsizei aCount, GLuint *aNames);
     void CreatedTextures(GLContext *aOrigin, GLsizei aCount, GLuint *aNames);
     void CreatedFramebuffers(GLContext *aOrigin, GLsizei aCount, GLuint *aNames);
     void CreatedRenderbuffers(GLContext *aOrigin, GLsizei aCount, GLuint *aNames);
     void DeletedProgram(GLContext *aOrigin, GLuint aName);
     void DeletedShader(GLContext *aOrigin, GLuint aName);
     void DeletedBuffers(GLContext *aOrigin, GLsizei aCount, const GLuint *aNames);
     void DeletedQueries(GLContext *aOrigin, GLsizei aCount, const GLuint *aNames);
     void DeletedTextures(GLContext *aOrigin, GLsizei aCount, const GLuint *aNames);
     void DeletedFramebuffers(GLContext *aOrigin, GLsizei aCount, const GLuint *aNames);
     void DeletedRenderbuffers(GLContext *aOrigin, GLsizei aCount, const GLuint *aNames);
     void SharedContextDestroyed(GLContext *aChild);
     void ReportOutstandingNames();
     struct NamedResource {
         NamedResource()
             : origin(nullptr), name(0), originDeleted(false)
         { }
         NamedResource(GLContext *aOrigin, GLuint aName)
             : origin(aOrigin), name(aName), originDeleted(false)
         { }
         GLContext *origin;
         GLuint name;
         bool originDeleted;
         // for sorting
         bool operator<(const NamedResource& aOther) const {
             if (intptr_t(origin) < intptr_t(aOther.origin))
                 return true;
             if (name < aOther.name)
                 return true;
             return false;
         }
         bool operator==(const NamedResource& aOther) const {
             return origin == aOther.origin &&
                 name == aOther.name &&
                 originDeleted == aOther.originDeleted;
         }
     };
     nsTArray<NamedResource> mTrackedPrograms;
     nsTArray<NamedResource> mTrackedShaders;
     nsTArray<NamedResource> mTrackedTextures;
     nsTArray<NamedResource> mTrackedFramebuffers;
     nsTArray<NamedResource> mTrackedRenderbuffers;
     nsTArray<NamedResource> mTrackedBuffers;
     nsTArray<NamedResource> mTrackedQueries;
 #endif
 };
 bool DoesStringMatch(const char* aString, const char *aWantedString);
 } /* namespace gl */
 } /* namespace mozilla */
 #endif /* GLCONTEXT_H_ */

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gfx/gl/GLContext.h@b8a032363ba2 (annotated)

gfx/gl/GLContext.h