#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

"""code generator for GL/GLES extension wrangler."""

import optparse
import os
import collections
import re
import sys

"""In case there are multiple versions of the same function, one that's listed
first takes priority if its conditions are met. If the function is an extension
function, finding the extension from the extension string is a condition for
binding it. The last version of the function is treated as a fallback option in
case no other versions were bound, so a non-null function pointer in the
bindings does not guarantee that the function is supported.

Function binding conditions can be specified manually by supplying a versions
array instead of the names array. Each version has the following keys:
   name: Mandatory. Name of the function. Multiple versions can have the same
         name but different conditions.
   gl_versions: List of GL versions where the function is found.
   extensions: Extensions where the function is found. If not specified, the
               extensions are determined based on GL header files.
               If the function exists in an extension header, you may specify
               an empty array to prevent making that a condition for binding.

By default, the function gets its name from the first name in its names or
versions array. This can be overridden by supplying a 'known_as' key.
"""
GL_FUNCTIONS = [
{ 'return_type': 'void',
  'names': ['glActiveTexture'],
  'arguments': 'GLenum texture', },
{ 'return_type': 'void',
  'names': ['glAttachShader'],
  'arguments': 'GLuint program, GLuint shader', },
{ 'return_type': 'void',
  'names': ['glBeginQuery'],
  'arguments': 'GLenum target, GLuint id', },
{ 'return_type': 'void',
  'names': ['glBeginQueryARB', 'glBeginQueryEXT'],
  'arguments': 'GLenum target, GLuint id', },
{ 'return_type': 'void',
  'names': ['glBindAttribLocation'],
  'arguments': 'GLuint program, GLuint index, const char* name', },
{ 'return_type': 'void',
  'names': ['glBindBuffer'],
  'arguments': 'GLenum target, GLuint buffer', },
{ 'return_type': 'void',
  'names': ['glBindFragDataLocation'],
  'arguments': 'GLuint program, GLuint colorNumber, const char* name', },
{ 'return_type': 'void',
  'names': ['glBindFragDataLocationIndexed'],
  'arguments':
      'GLuint program, GLuint colorNumber, GLuint index, const char* name', },
{ 'return_type': 'void',
  'names': ['glBindFramebufferEXT', 'glBindFramebuffer'],
  'arguments': 'GLenum target, GLuint framebuffer', },
{ 'return_type': 'void',
  'names': ['glBindRenderbufferEXT', 'glBindRenderbuffer'],
  'arguments': 'GLenum target, GLuint renderbuffer', },
{ 'return_type': 'void',
  'names': ['glBindTexture'],
  'arguments': 'GLenum target, GLuint texture', },
{ 'return_type': 'void',
  'names': ['glBlendColor'],
  'arguments': 'GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha', },
{ 'return_type': 'void',
  'names': ['glBlendEquation'],
  'arguments': ' GLenum mode ', },
{ 'return_type': 'void',
  'names': ['glBlendEquationSeparate'],
  'arguments': 'GLenum modeRGB, GLenum modeAlpha', },
{ 'return_type': 'void',
  'names': ['glBlendFunc'],
  'arguments': 'GLenum sfactor, GLenum dfactor', },
{ 'return_type': 'void',
  'names': ['glBlendFuncSeparate'],
  'arguments':
      'GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha', },
{ 'return_type': 'void',
  'names': ['glBlitFramebuffer'],
  'arguments': 'GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, '
               'GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, '
               'GLbitfield mask, GLenum filter', },
{ 'return_type': 'void',
  'names': ['glBlitFramebufferEXT', 'glBlitFramebuffer'],
  'arguments': 'GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, '
               'GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, '
               'GLbitfield mask, GLenum filter', },
{ 'return_type': 'void',
  'names': ['glBlitFramebufferANGLE', 'glBlitFramebuffer'],
  'arguments': 'GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, '
               'GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, '
               'GLbitfield mask, GLenum filter', },
{ 'return_type': 'void',
  'names': ['glBufferData'],
  'arguments':
      'GLenum target, GLsizeiptr size, const void* data, GLenum usage', },
{ 'return_type': 'void',
  'names': ['glBufferSubData'],
  'arguments':
      'GLenum target, GLintptr offset, GLsizeiptr size, const void* data', },
{ 'return_type': 'GLenum',
  'names': ['glCheckFramebufferStatusEXT',
            'glCheckFramebufferStatus'],
  'arguments': 'GLenum target',
  'logging_code': """
  GL_SERVICE_LOG("GL_RESULT: " << GLES2Util::GetStringEnum(result));
""", },
{ 'return_type': 'void',
  'names': ['glClear'],
  'arguments': 'GLbitfield mask', },
{ 'return_type': 'void',
  'names': ['glClearColor'],
  'arguments': 'GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha', },
{ 'return_type': 'void',
  'names': ['glClearDepth'],
  'arguments': 'GLclampd depth', },
{ 'return_type': 'void',
  'names': ['glClearDepthf'],
  'arguments': 'GLclampf depth', },
{ 'return_type': 'void',
  'names': ['glClearStencil'],
  'arguments': 'GLint s', },
{ 'return_type': 'void',
  'names': ['glColorMask'],
  'arguments':
      'GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha', },
{ 'return_type': 'void',
  'names': ['glCompileShader'],
  'arguments': 'GLuint shader', },
{ 'return_type': 'void',
  'names': ['glCompressedTexImage2D'],
  'arguments':
      'GLenum target, GLint level, GLenum internalformat, GLsizei width, '
      'GLsizei height, GLint border, GLsizei imageSize, const void* data', },
{ 'return_type': 'void',
  'names': ['glCompressedTexSubImage2D'],
  'arguments':
     'GLenum target, GLint level, GLint xoffset, GLint yoffset, '
     'GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, '
     'const void* data', },
{ 'return_type': 'void',
  'names': ['glCopyTexImage2D'],
  'arguments':
      'GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, '
      'GLsizei width, GLsizei height, GLint border', },
{ 'return_type': 'void',
  'names': ['glCopyTexSubImage2D'],
  'arguments':
      'GLenum target, GLint level, GLint xoffset, '
      'GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height', },
{ 'return_type': 'GLuint',
  'names': ['glCreateProgram'],
  'arguments': 'void', },
{ 'return_type': 'GLuint',
  'names': ['glCreateShader'],
  'arguments': 'GLenum type', },
{ 'return_type': 'void',
  'names': ['glCullFace'],
  'arguments': 'GLenum mode', },
{ 'return_type': 'void',
  'names': ['glDeleteBuffersARB', 'glDeleteBuffers'],
  'arguments': 'GLsizei n, const GLuint* buffers', },
{ 'return_type': 'void',
  'names': ['glDeleteFramebuffersEXT', 'glDeleteFramebuffers'],
  'arguments': 'GLsizei n, const GLuint* framebuffers', },
{ 'return_type': 'void',
  'names': ['glDeleteProgram'],
  'arguments': 'GLuint program', },
{ 'return_type': 'void',
  'names': ['glDeleteQueries'],
  'arguments': 'GLsizei n, const GLuint* ids', },
{ 'return_type': 'void',
  'names': ['glDeleteQueriesARB', 'glDeleteQueriesEXT'],
  'arguments': 'GLsizei n, const GLuint* ids', },
{ 'return_type': 'void',
  'names': ['glDeleteRenderbuffersEXT', 'glDeleteRenderbuffers'],
  'arguments': 'GLsizei n, const GLuint* renderbuffers', },
{ 'return_type': 'void',
  'names': ['glDeleteShader'],
  'arguments': 'GLuint shader', },
{ 'return_type': 'void',
  'names': ['glDeleteTextures'],
  'arguments': 'GLsizei n, const GLuint* textures', },
{ 'return_type': 'void',
  'names': ['glDepthFunc'],
  'arguments': 'GLenum func', },
{ 'return_type': 'void',
  'names': ['glDepthMask'],
  'arguments': 'GLboolean flag', },
{ 'return_type': 'void',
  'names': ['glDepthRange'],
  'arguments': 'GLclampd zNear, GLclampd zFar', },
{ 'return_type': 'void',
  'names': ['glDepthRangef'],
  'arguments': 'GLclampf zNear, GLclampf zFar', },
{ 'return_type': 'void',
  'names': ['glDetachShader'],
  'arguments': 'GLuint program, GLuint shader', },
{ 'return_type': 'void',
  'names': ['glDisable'],
  'arguments': 'GLenum cap', },
{ 'return_type': 'void',
  'names': ['glDisableVertexAttribArray'],
  'arguments': 'GLuint index', },
{ 'return_type': 'void',
  'names': ['glDrawArrays'],
  'arguments': 'GLenum mode, GLint first, GLsizei count', },
{ 'return_type': 'void',
  'names': ['glDrawBuffer'],
  'arguments': 'GLenum mode', },
{ 'return_type': 'void',
  'names': ['glDrawBuffersARB', 'glDrawBuffersEXT'],
  'arguments': 'GLsizei n, const GLenum* bufs', },
{ 'return_type': 'void',
  'names': ['glDrawElements'],
  'arguments':
      'GLenum mode, GLsizei count, GLenum type, const void* indices', },
{ 'return_type': 'void',
  'names': ['glEGLImageTargetTexture2DOES'],
  'arguments': 'GLenum target, GLeglImageOES image', },
{ 'return_type': 'void',
  'names': ['glEGLImageTargetRenderbufferStorageOES'],
  'arguments': 'GLenum target, GLeglImageOES image', },
{ 'return_type': 'void',
  'names': ['glEnable'],
  'arguments': 'GLenum cap', },
{ 'return_type': 'void',
  'names': ['glEnableVertexAttribArray'],
  'arguments': 'GLuint index', },
{ 'return_type': 'void',
  'names': ['glEndQuery'],
  'arguments': 'GLenum target', },
{ 'return_type': 'void',
  'names': ['glEndQueryARB', 'glEndQueryEXT'],
  'arguments': 'GLenum target', },
{ 'return_type': 'void',
  'names': ['glFinish'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['glFlush'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['glFramebufferRenderbufferEXT', 'glFramebufferRenderbuffer'],
  'arguments': \
      'GLenum target, GLenum attachment, GLenum renderbuffertarget, '
      'GLuint renderbuffer', },
{ 'return_type': 'void',
  'names': ['glFramebufferTexture2DEXT', 'glFramebufferTexture2D'],
  'arguments':
      'GLenum target, GLenum attachment, GLenum textarget, GLuint texture, '
      'GLint level', },
{ 'return_type': 'void',
  'names': ['glFramebufferTexture2DMultisampleEXT'],
  'arguments':
      'GLenum target, GLenum attachment, GLenum textarget, GLuint texture, '
      'GLint level, GLsizei samples', },
{ 'return_type': 'void',
  'names': ['glFramebufferTexture2DMultisampleIMG'],
  'arguments':
      'GLenum target, GLenum attachment, GLenum textarget, GLuint texture, '
      'GLint level, GLsizei samples', },
{ 'return_type': 'void',
  'names': ['glFrontFace'],
  'arguments': 'GLenum mode', },
{ 'return_type': 'void',
  'names': ['glGenBuffersARB', 'glGenBuffers'],
  'arguments': 'GLsizei n, GLuint* buffers', },
{ 'return_type': 'void',
  'names': ['glGenQueries'],
  'arguments': 'GLsizei n, GLuint* ids', },
{ 'return_type': 'void',
  'names': ['glGenQueriesARB', 'glGenQueriesEXT'],
  'arguments': 'GLsizei n, GLuint* ids', },
{ 'return_type': 'void',
  'names': ['glGenerateMipmapEXT', 'glGenerateMipmap'],
  'arguments': 'GLenum target', },
{ 'return_type': 'void',
  'names': ['glGenFramebuffersEXT', 'glGenFramebuffers'],
  'arguments': 'GLsizei n, GLuint* framebuffers', },
{ 'return_type': 'void',
  'names': ['glGenRenderbuffersEXT', 'glGenRenderbuffers'],
  'arguments': 'GLsizei n, GLuint* renderbuffers', },
{ 'return_type': 'void',
  'names': ['glGenTextures'],
  'arguments': 'GLsizei n, GLuint* textures', },
{ 'return_type': 'void',
  'names': ['glGetActiveAttrib'],
  'arguments':
      'GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, '
      'GLint* size, GLenum* type, char* name', },
{ 'return_type': 'void',
  'names': ['glGetActiveUniform'],
  'arguments':
      'GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, '
      'GLint* size, GLenum* type, char* name', },
{ 'return_type': 'void',
  'names': ['glGetAttachedShaders'],
  'arguments':
      'GLuint program, GLsizei maxcount, GLsizei* count, GLuint* shaders', },
{ 'return_type': 'GLint',
  'names': ['glGetAttribLocation'],
  'arguments': 'GLuint program, const char* name', },
{ 'return_type': 'void',
  'names': ['glGetBooleanv'],
  'arguments': 'GLenum pname, GLboolean* params', },
{ 'return_type': 'void',
  'names': ['glGetBufferParameteriv'],
  'arguments': 'GLenum target, GLenum pname, GLint* params', },
{ 'return_type': 'GLenum',
  'names': ['glGetError'],
  'arguments': 'void',
  'logging_code': """
  GL_SERVICE_LOG("GL_RESULT: " << GLES2Util::GetStringError(result));
""", },
{ 'return_type': 'void',
  'names': ['glGetFloatv'],
  'arguments': 'GLenum pname, GLfloat* params', },
{ 'return_type': 'void',
  'names': ['glGetFramebufferAttachmentParameterivEXT',
            'glGetFramebufferAttachmentParameteriv'],
  'arguments': 'GLenum target, '
               'GLenum attachment, GLenum pname, GLint* params', },
{ 'return_type': 'GLenum',
  'names': ['glGetGraphicsResetStatusARB',
            'glGetGraphicsResetStatusEXT'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['glGetIntegerv'],
  'arguments': 'GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'known_as': 'glGetProgramBinary',
  'versions': [{ 'name': 'glGetProgramBinaryOES' },
               { 'name': 'glGetProgramBinary',
                 'extensions': ['GL_ARB_get_program_binary'] },
               { 'name': 'glGetProgramBinary' }],
  'arguments': 'GLuint program, GLsizei bufSize, GLsizei* length, '
               'GLenum* binaryFormat, GLvoid* binary' },
{ 'return_type': 'void',
  'names': ['glGetProgramiv'],
  'arguments': 'GLuint program, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetProgramInfoLog'],
  'arguments':
      'GLuint program, GLsizei bufsize, GLsizei* length, char* infolog', },
{ 'return_type': 'void',
  'names': ['glGetQueryiv'],
  'arguments': 'GLenum target, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetQueryivARB', 'glGetQueryivEXT'],
  'arguments': 'GLenum target, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetQueryObjecti64v'],
  'arguments': 'GLuint id, GLenum pname, GLint64* params', },
{ 'return_type': 'void',
  'names': ['glGetQueryObjectiv'],
  'arguments': 'GLuint id, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetQueryObjectui64v'],
  'arguments': 'GLuint id, GLenum pname, GLuint64* params', },
{ 'return_type': 'void',
  'names': ['glGetQueryObjectuiv'],
  'arguments': 'GLuint id, GLenum pname, GLuint* params', },
{ 'return_type': 'void',
  'names': ['glGetQueryObjectuivARB', 'glGetQueryObjectuivEXT'],
  'arguments': 'GLuint id, GLenum pname, GLuint* params', },
{ 'return_type': 'void',
  'names': ['glGetRenderbufferParameterivEXT', 'glGetRenderbufferParameteriv'],
  'arguments': 'GLenum target, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetShaderiv'],
  'arguments': 'GLuint shader, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetShaderInfoLog'],
  'arguments':
      'GLuint shader, GLsizei bufsize, GLsizei* length, char* infolog', },
{ 'return_type': 'void',
  'names': ['glGetShaderPrecisionFormat'],
  'arguments': 'GLenum shadertype, GLenum precisiontype, '
               'GLint* range, GLint* precision', },
{ 'return_type': 'void',
  'names': ['glGetShaderSource'],
  'arguments':
      'GLuint shader, GLsizei bufsize, GLsizei* length, char* source', },
{ 'return_type': 'const GLubyte*',
  'names': ['glGetString'],
  'arguments': 'GLenum name', },
{ 'return_type': 'void',
  'names': ['glGetTexLevelParameterfv'],
  'arguments': 'GLenum target, GLint level, GLenum pname, GLfloat* params', },
{ 'return_type': 'void',
  'names': ['glGetTexLevelParameteriv'],
  'arguments': 'GLenum target, GLint level, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetTexParameterfv'],
  'arguments': 'GLenum target, GLenum pname, GLfloat* params', },
{ 'return_type': 'void',
  'names': ['glGetTexParameteriv'],
  'arguments': 'GLenum target, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetTranslatedShaderSourceANGLE'],
  'arguments':
      'GLuint shader, GLsizei bufsize, GLsizei* length, char* source', },
{ 'return_type': 'void',
  'names': ['glGetUniformfv'],
  'arguments': 'GLuint program, GLint location, GLfloat* params', },
{ 'return_type': 'void',
  'names': ['glGetUniformiv'],
  'arguments': 'GLuint program, GLint location, GLint* params', },
{ 'return_type': 'GLint',
  'names': ['glGetUniformLocation'],
  'arguments': 'GLuint program, const char* name', },
{ 'return_type': 'void',
  'names': ['glGetVertexAttribfv'],
  'arguments': 'GLuint index, GLenum pname, GLfloat* params', },
{ 'return_type': 'void',
  'names': ['glGetVertexAttribiv'],
  'arguments': 'GLuint index, GLenum pname, GLint* params', },
{ 'return_type': 'void',
  'names': ['glGetVertexAttribPointerv'],
  'arguments': 'GLuint index, GLenum pname, void** pointer', },
{ 'return_type': 'void',
  'names': ['glHint'],
  'arguments': 'GLenum target, GLenum mode', },
{ 'return_type': 'void',
  'names': ['glInsertEventMarkerEXT'],
  'arguments': 'GLsizei length, const char* marker', },
{ 'return_type': 'GLboolean',
  'names': ['glIsBuffer'],
  'arguments': 'GLuint buffer', },
{ 'return_type': 'GLboolean',
  'names': ['glIsEnabled'],
  'arguments': 'GLenum cap', },
{ 'return_type': 'GLboolean',
  'names': ['glIsFramebufferEXT', 'glIsFramebuffer'],
  'arguments': 'GLuint framebuffer', },
{ 'return_type': 'GLboolean',
  'names': ['glIsProgram'],
  'arguments': 'GLuint program', },
{ 'return_type': 'GLboolean',
  'names': ['glIsQueryARB', 'glIsQueryEXT'],
  'arguments': 'GLuint query', },
{ 'return_type': 'GLboolean',
  'names': ['glIsRenderbufferEXT', 'glIsRenderbuffer'],
  'arguments': 'GLuint renderbuffer', },
{ 'return_type': 'GLboolean',
  'names': ['glIsShader'],
  'arguments': 'GLuint shader', },
{ 'return_type': 'GLboolean',
  'names': ['glIsTexture'],
  'arguments': 'GLuint texture', },
{ 'return_type': 'void',
  'names': ['glLineWidth'],
  'arguments': 'GLfloat width', },
{ 'return_type': 'void',
  'names': ['glLinkProgram'],
  'arguments': 'GLuint program', },
{ 'return_type': 'void*',
  'known_as': 'glMapBuffer',
  'names': ['glMapBufferOES', 'glMapBuffer'],
  'arguments': 'GLenum target, GLenum access', },
{ 'return_type': 'void*',
  'names': ['glMapBufferRange'],
  'arguments':
      'GLenum target, GLintptr offset, GLsizeiptr length, GLenum access', },
{ 'return_type': 'void',
  'names': ['glFlushMappedBufferRange'],
  'arguments': 'GLenum target, GLintptr offset, GLsizeiptr length', },
{ 'return_type': 'void',
  'names': ['glPixelStorei'],
  'arguments': 'GLenum pname, GLint param', },
{ 'return_type': 'void',
  'names': ['glPointParameteri'],
  'arguments': 'GLenum pname, GLint param', },
{ 'return_type': 'void',
  'names': ['glPolygonOffset'],
  'arguments': 'GLfloat factor, GLfloat units', },
{ 'return_type': 'void',
  'names': ['glPopGroupMarkerEXT'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'known_as': 'glProgramBinary',
  'versions': [{ 'name': 'glProgramBinaryOES' },
               { 'name': 'glProgramBinary',
                 'extensions': ['GL_ARB_get_program_binary'] },
               { 'name': 'glProgramBinary' }],
  'arguments': 'GLuint program, GLenum binaryFormat, '
               'const GLvoid* binary, GLsizei length' },
{ 'return_type': 'void',
  'versions': [{ 'name': 'glProgramParameteri',
                 'extensions': ['GL_ARB_get_program_binary'] },
               { 'name': 'glProgramParameteri' }],
  'arguments': 'GLuint program, GLenum pname, GLint value' },
{ 'return_type': 'void',
  'names': ['glPushGroupMarkerEXT'],
  'arguments': 'GLsizei length, const char* marker', },
{ 'return_type': 'void',
  'names': ['glQueryCounter'],
  'arguments': 'GLuint id, GLenum target', },
{ 'return_type': 'void',
  'names': ['glReadBuffer'],
  'arguments': 'GLenum src', },
{ 'return_type': 'void',
  'names': ['glReadPixels'],
  'arguments':
    'GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, '
    'GLenum type, void* pixels', },
{ 'return_type': 'void',
  'names': ['glReleaseShaderCompiler'],
  'arguments': 'void', },
# Multisampling API is different in different GL versions, some require an
# explicit resolve step for renderbuffers and/or FBO texture attachments and
# some do not. Multiple alternatives might be present in a single
# implementation, which require different use of the API and may have
# different performance (explicit resolve performing worse, for example).
# So even though the function signature is the same across versions, we split
# their definitions so that the function to use can be chosen correctly at a
# higher level.
# TODO(oetuaho@nvidia.com): Some of these might still be possible to combine.
# This could also fix weirdness in the mock bindings that's caused by the same
# function name appearing multiple times.
# This is the ES3 function, which requires explicit resolve:
{ 'return_type': 'void',
  'names': ['glRenderbufferStorageMultisample'],
  'arguments': 'GLenum target, GLsizei samples, GLenum internalformat, '
               'GLsizei width, GLsizei height', },
# In desktop GL, EXT and core versions both have an explicit resolve step,
# though desktop core GL implicitly resolves when drawing to a window.
# TODO(oetuaho@nvidia.com): Right now this function also doubles as ES2 EXT
# function, which has implicit resolve, and for which the fallback is wrong.
# Fix this.
{ 'return_type': 'void',
  'names': ['glRenderbufferStorageMultisampleEXT',
            'glRenderbufferStorageMultisample'],
  'arguments': 'GLenum target, GLsizei samples, GLenum internalformat, '
               'GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glRenderbufferStorageMultisampleANGLE',
            'glRenderbufferStorageMultisample'],
  'arguments': 'GLenum target, GLsizei samples, GLenum internalformat, '
               'GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glRenderbufferStorageMultisampleIMG'],
  'arguments': 'GLenum target, GLsizei samples, GLenum internalformat, '
               'GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glRenderbufferStorageEXT', 'glRenderbufferStorage'],
  'arguments':
      'GLenum target, GLenum internalformat, GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glSampleCoverage'],
  'arguments': 'GLclampf value, GLboolean invert', },
{ 'return_type': 'void',
  'names': ['glScissor'],
  'arguments': 'GLint x, GLint y, GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glShaderBinary'],
  'arguments': 'GLsizei n, const GLuint* shaders, GLenum binaryformat, '
               'const void* binary, GLsizei length', },
{ 'return_type': 'void',
  'names': ['glShaderSource'],
  'arguments': 'GLuint shader, GLsizei count, const char* const* str, '
               'const GLint* length',
  'logging_code': """
  GL_SERVICE_LOG_CODE_BLOCK({
    for (GLsizei ii = 0; ii < count; ++ii) {
      if (str[ii]) {
        if (length && length[ii] >= 0) {
          std::string source(str[ii], length[ii]);
          GL_SERVICE_LOG("  " << ii << ": ---\\n" << source << "\\n---");
        } else {
          GL_SERVICE_LOG("  " << ii << ": ---\\n" << str[ii] << "\\n---");
        }
      } else {
        GL_SERVICE_LOG("  " << ii << ": NULL");
      }
    }
  });
""", },
{ 'return_type': 'void',
  'names': ['glStencilFunc'],
  'arguments': 'GLenum func, GLint ref, GLuint mask', },
{ 'return_type': 'void',
  'names': ['glStencilFuncSeparate'],
  'arguments': 'GLenum face, GLenum func, GLint ref, GLuint mask', },
{ 'return_type': 'void',
  'names': ['glStencilMask'],
  'arguments': 'GLuint mask', },
{ 'return_type': 'void',
  'names': ['glStencilMaskSeparate'],
  'arguments': 'GLenum face, GLuint mask', },
{ 'return_type': 'void',
  'names': ['glStencilOp'],
  'arguments': 'GLenum fail, GLenum zfail, GLenum zpass', },
{ 'return_type': 'void',
  'names': ['glStencilOpSeparate'],
  'arguments': 'GLenum face, GLenum fail, GLenum zfail, GLenum zpass', },
{ 'return_type': 'void',
  'names': ['glTexImage2D'],
  'arguments':
      'GLenum target, GLint level, GLint internalformat, GLsizei width, '
      'GLsizei height, GLint border, GLenum format, GLenum type, '
      'const void* pixels', },
{ 'return_type': 'void',
  'names': ['glTexParameterf'],
  'arguments': 'GLenum target, GLenum pname, GLfloat param', },
{ 'return_type': 'void',
  'names': ['glTexParameterfv'],
  'arguments': 'GLenum target, GLenum pname, const GLfloat* params', },
{ 'return_type': 'void',
  'names': ['glTexParameteri'],
  'arguments': 'GLenum target, GLenum pname, GLint param', },
{ 'return_type': 'void',
  'names': ['glTexParameteriv'],
  'arguments': 'GLenum target, GLenum pname, const GLint* params', },
{ 'return_type': 'void',
  'names': ['glTexStorage2DEXT'],
  'arguments': 'GLenum target, GLsizei levels, GLenum internalformat, '
               'GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glTexSubImage2D'],
  'arguments':
     'GLenum target, GLint level, GLint xoffset, GLint yoffset, '
     'GLsizei width, GLsizei height, GLenum format, GLenum type, '
     'const void* pixels', },
{ 'return_type': 'void',
  'names': ['glUniform1f'],
  'arguments': 'GLint location, GLfloat x', },
{ 'return_type': 'void',
  'names': ['glUniform1fv'],
  'arguments': 'GLint location, GLsizei count, const GLfloat* v', },
{ 'return_type': 'void',
  'names': ['glUniform1i'],
  'arguments': 'GLint location, GLint x', },
{ 'return_type': 'void',
  'names': ['glUniform1iv'],
  'arguments': 'GLint location, GLsizei count, const GLint* v', },
{ 'return_type': 'void',
  'names': ['glUniform2f'],
  'arguments': 'GLint location, GLfloat x, GLfloat y', },
{ 'return_type': 'void',
  'names': ['glUniform2fv'],
  'arguments': 'GLint location, GLsizei count, const GLfloat* v', },
{ 'return_type': 'void',
  'names': ['glUniform2i'],
  'arguments': 'GLint location, GLint x, GLint y', },
{ 'return_type': 'void',
  'names': ['glUniform2iv'],
  'arguments': 'GLint location, GLsizei count, const GLint* v', },
{ 'return_type': 'void',
  'names': ['glUniform3f'],
  'arguments': 'GLint location, GLfloat x, GLfloat y, GLfloat z', },
{ 'return_type': 'void',
  'names': ['glUniform3fv'],
  'arguments': 'GLint location, GLsizei count, const GLfloat* v', },
{ 'return_type': 'void',
  'names': ['glUniform3i'],
  'arguments': 'GLint location, GLint x, GLint y, GLint z', },
{ 'return_type': 'void',
  'names': ['glUniform3iv'],
  'arguments': 'GLint location, GLsizei count, const GLint* v', },
{ 'return_type': 'void',
  'names': ['glUniform4f'],
  'arguments': 'GLint location, GLfloat x, GLfloat y, GLfloat z, GLfloat w', },
{ 'return_type': 'void',
  'names': ['glUniform4fv'],
  'arguments': 'GLint location, GLsizei count, const GLfloat* v', },
{ 'return_type': 'void',
  'names': ['glUniform4i'],
  'arguments': 'GLint location, GLint x, GLint y, GLint z, GLint w', },
{ 'return_type': 'void',
  'names': ['glUniform4iv'],
  'arguments': 'GLint location, GLsizei count, const GLint* v', },
{ 'return_type': 'void',
  'names': ['glUniformMatrix2fv'],
  'arguments': 'GLint location, GLsizei count, '
               'GLboolean transpose, const GLfloat* value', },
{ 'return_type': 'void',
  'names': ['glUniformMatrix3fv'],
  'arguments': 'GLint location, GLsizei count, '
               'GLboolean transpose, const GLfloat* value', },
{ 'return_type': 'void',
  'names': ['glUniformMatrix4fv'],
  'arguments': 'GLint location, GLsizei count, '
               'GLboolean transpose, const GLfloat* value', },
{ 'return_type': 'GLboolean',
  'known_as': 'glUnmapBuffer',
  'names': ['glUnmapBufferOES', 'glUnmapBuffer'],
  'arguments': 'GLenum target', },
{ 'return_type': 'void',
  'names': ['glUseProgram'],
  'arguments': 'GLuint program', },
{ 'return_type': 'void',
  'names': ['glValidateProgram'],
  'arguments': 'GLuint program', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib1f'],
  'arguments': 'GLuint indx, GLfloat x', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib1fv'],
  'arguments': 'GLuint indx, const GLfloat* values', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib2f'],
  'arguments': 'GLuint indx, GLfloat x, GLfloat y', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib2fv'],
  'arguments': 'GLuint indx, const GLfloat* values', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib3f'],
  'arguments': 'GLuint indx, GLfloat x, GLfloat y, GLfloat z', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib3fv'],
  'arguments': 'GLuint indx, const GLfloat* values', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib4f'],
  'arguments': 'GLuint indx, GLfloat x, GLfloat y, GLfloat z, GLfloat w', },
{ 'return_type': 'void',
  'names': ['glVertexAttrib4fv'],
  'arguments': 'GLuint indx, const GLfloat* values', },
{ 'return_type': 'void',
  'names': ['glVertexAttribPointer'],
  'arguments': 'GLuint indx, GLint size, GLenum type, GLboolean normalized, '
               'GLsizei stride, const void* ptr', },
{ 'return_type': 'void',
  'names': ['glViewport'],
  'arguments': 'GLint x, GLint y, GLsizei width, GLsizei height', },
{ 'return_type': 'void',
  'names': ['glGenFencesNV'],
  'arguments': 'GLsizei n, GLuint* fences', },
{ 'return_type': 'void',
  'names': ['glDeleteFencesNV'],
  'arguments': 'GLsizei n, const GLuint* fences', },
{ 'return_type': 'void',
  'names': ['glSetFenceNV'],
  'arguments': 'GLuint fence, GLenum condition', },
{ 'return_type': 'GLboolean',
  'names': ['glTestFenceNV'],
  'arguments': 'GLuint fence', },
{ 'return_type': 'void',
  'names': ['glFinishFenceNV'],
  'arguments': 'GLuint fence', },
{ 'return_type': 'GLboolean',
  'names': ['glIsFenceNV'],
  'arguments': 'GLuint fence', },
{ 'return_type': 'void',
  'names': ['glGetFenceivNV'],
  'arguments': 'GLuint fence, GLenum pname, GLint* params', },
{ 'return_type': 'GLsync',
  'names': ['glFenceSync'],
  'arguments': 'GLenum condition, GLbitfield flags', },
{ 'return_type': 'GLboolean',
  'names': ['glIsSync'],
  'arguments': 'GLsync sync', },
{ 'return_type': 'void',
  'names': ['glDeleteSync'],
  'arguments': 'GLsync sync', },
{ 'return_type': 'void',
  'names': ['glGetSynciv'],
  'arguments':
    'GLsync sync, GLenum pname, GLsizei bufSize, GLsizei* length,'
    'GLint* values', },
{ 'return_type': 'GLenum',
  'names': ['glClientWaitSync'],
  'arguments':
    'GLsync sync, GLbitfield flags, GLuint64 timeout', },
{ 'return_type': 'GLenum',
  'names': ['glWaitSync'],
  'arguments':
    'GLsync sync, GLbitfield flags, GLuint64 timeout', },
{ 'return_type': 'void',
  'known_as': 'glDrawArraysInstancedANGLE',
  'names': ['glDrawArraysInstancedARB', 'glDrawArraysInstancedANGLE',
            'glDrawArraysInstanced'],
  'arguments': 'GLenum mode, GLint first, GLsizei count, GLsizei primcount', },
{ 'return_type': 'void',
  'known_as': 'glDrawElementsInstancedANGLE',
  'names': ['glDrawElementsInstancedARB', 'glDrawElementsInstancedANGLE',
            'glDrawElementsInstanced'],
  'arguments':
      'GLenum mode, GLsizei count, GLenum type, const void* indices, '
      'GLsizei primcount', },
{ 'return_type': 'void',
  'known_as': 'glVertexAttribDivisorANGLE',
  'names': ['glVertexAttribDivisorARB', 'glVertexAttribDivisorANGLE',
            'glVertexAttribDivisor'],
  'arguments':
      'GLuint index, GLuint divisor', },
{ 'return_type': 'void',
  'known_as': 'glGenVertexArraysOES',
  'versions': [{ 'name': 'glGenVertexArrays',
                 'gl_versions': ['gl3', 'gl4'] },
               { 'name': 'glGenVertexArrays',
                 'extensions': ['GL_ARB_vertex_array_object'] },
               { 'name': 'glGenVertexArraysOES' },
               { 'name': 'glGenVertexArraysAPPLE',
                 'extensions': ['GL_APPLE_vertex_array_object'] }],
  'arguments': 'GLsizei n, GLuint* arrays', },
{ 'return_type': 'void',
  'known_as': 'glDeleteVertexArraysOES',
  'versions': [{ 'name': 'glDeleteVertexArrays',
                 'gl_versions': ['gl3', 'gl4'] },
               { 'name': 'glDeleteVertexArrays',
                 'extensions': ['GL_ARB_vertex_array_object'] },
               { 'name': 'glDeleteVertexArraysOES' },
               { 'name': 'glDeleteVertexArraysAPPLE',
                 'extensions': ['GL_APPLE_vertex_array_object'] }],
  'arguments': 'GLsizei n, const GLuint* arrays' },
{ 'return_type': 'void',
  'known_as': 'glBindVertexArrayOES',
  'versions': [{ 'name': 'glBindVertexArray',
                 'gl_versions': ['gl3', 'gl4'] },
               { 'name': 'glBindVertexArray',
                 'extensions': ['GL_ARB_vertex_array_object'] },
               { 'name': 'glBindVertexArrayOES' },
               { 'name': 'glBindVertexArrayAPPLE',
                 'extensions': ['GL_APPLE_vertex_array_object'] }],
  'arguments': 'GLuint array' },
{ 'return_type': 'GLboolean',
  'known_as': 'glIsVertexArrayOES',
  'versions': [{ 'name': 'glIsVertexArray',
                 'gl_versions': ['gl3', 'gl4'] },
               { 'name': 'glIsVertexArray',
                 'extensions': ['GL_ARB_vertex_array_object'] },
               { 'name': 'glIsVertexArrayOES' },
               { 'name': 'glIsVertexArrayAPPLE',
                 'extensions': ['GL_APPLE_vertex_array_object'] }],
  'arguments': 'GLuint array' },
{ 'return_type': 'void',
  'known_as': 'glDiscardFramebufferEXT',
  'versions': [{ 'name': 'glInvalidateFramebuffer',
                 'gl_versions': ['es3'],
                 'extensions': [] },
               { 'name': 'glDiscardFramebufferEXT',
                 'gl_versions': ['es1', 'es2'] }],
  'arguments': 'GLenum target, GLsizei numAttachments, '
      'const GLenum* attachments' },
]

OSMESA_FUNCTIONS = [
{ 'return_type': 'OSMesaContext',
  'names': ['OSMesaCreateContext'],
  'arguments': 'GLenum format, OSMesaContext sharelist', },
{ 'return_type': 'OSMesaContext',
  'names': ['OSMesaCreateContextExt'],
  'arguments':
      'GLenum format, GLint depthBits, GLint stencilBits, GLint accumBits, '
      'OSMesaContext sharelist', },
{ 'return_type': 'void',
  'names': ['OSMesaDestroyContext'],
  'arguments': 'OSMesaContext ctx', },
{ 'return_type': 'GLboolean',
  'names': ['OSMesaMakeCurrent'],
  'arguments': 'OSMesaContext ctx, void* buffer, GLenum type, GLsizei width, '
               'GLsizei height', },
{ 'return_type': 'OSMesaContext',
  'names': ['OSMesaGetCurrentContext'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['OSMesaPixelStore'],
  'arguments': 'GLint pname, GLint value', },
{ 'return_type': 'void',
  'names': ['OSMesaGetIntegerv'],
  'arguments': 'GLint pname, GLint* value', },
{ 'return_type': 'GLboolean',
  'names': ['OSMesaGetDepthBuffer'],
  'arguments':
      'OSMesaContext c, GLint* width, GLint* height, GLint* bytesPerValue, '
      'void** buffer', },
{ 'return_type': 'GLboolean',
  'names': ['OSMesaGetColorBuffer'],
  'arguments': 'OSMesaContext c, GLint* width, GLint* height, GLint* format, '
               'void** buffer', },
{ 'return_type': 'OSMESAproc',
  'names': ['OSMesaGetProcAddress'],
  'arguments': 'const char* funcName', },
{ 'return_type': 'void',
  'names': ['OSMesaColorClamp'],
  'arguments': 'GLboolean enable', },
]

EGL_FUNCTIONS = [
{ 'return_type': 'EGLint',
  'names': ['eglGetError'],
  'arguments': 'void', },
{ 'return_type': 'EGLDisplay',
  'names': ['eglGetDisplay'],
  'arguments': 'EGLNativeDisplayType display_id', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglInitialize'],
  'arguments': 'EGLDisplay dpy, EGLint* major, EGLint* minor', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglTerminate'],
  'arguments': 'EGLDisplay dpy', },
{ 'return_type': 'const char*',
  'names': ['eglQueryString'],
  'arguments': 'EGLDisplay dpy, EGLint name', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglGetConfigs'],
  'arguments': 'EGLDisplay dpy, EGLConfig* configs, EGLint config_size, '
               'EGLint* num_config', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglChooseConfig'],
  'arguments': 'EGLDisplay dpy, const EGLint* attrib_list, EGLConfig* configs, '
               'EGLint config_size, EGLint* num_config', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglGetConfigAttrib'],
  'arguments':
      'EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint* value', },
{ 'return_type': 'EGLImageKHR',
  'versions': [{ 'name': 'eglCreateImageKHR',
                 'extensions':
                     ['EGL_KHR_image_base', 'EGL_KHR_gl_texture_2D_image'] }],
  'arguments':
      'EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, '
      'const EGLint* attrib_list' },
{ 'return_type': 'EGLBoolean',
  'versions': [{ 'name' : 'eglDestroyImageKHR',
                 'extensions': ['EGL_KHR_image_base'] }],
  'arguments': 'EGLDisplay dpy, EGLImageKHR image' },
{ 'return_type': 'EGLSurface',
  'names': ['eglCreateWindowSurface'],
  'arguments': 'EGLDisplay dpy, EGLConfig config, EGLNativeWindowType win, '
               'const EGLint* attrib_list', },
{ 'return_type': 'EGLSurface',
  'names': ['eglCreatePbufferSurface'],
  'arguments': 'EGLDisplay dpy, EGLConfig config, const EGLint* attrib_list', },
{ 'return_type': 'EGLSurface',
  'names': ['eglCreatePixmapSurface'],
  'arguments': 'EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, '
               'const EGLint* attrib_list', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglDestroySurface'],
  'arguments': 'EGLDisplay dpy, EGLSurface surface', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglQuerySurface'],
  'arguments':
      'EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint* value', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglBindAPI'],
  'arguments': 'EGLenum api', },
{ 'return_type': 'EGLenum',
  'names': ['eglQueryAPI'],
  'arguments': 'void', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglWaitClient'],
  'arguments': 'void', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglReleaseThread'],
  'arguments': 'void', },
{ 'return_type': 'EGLSurface',
  'names': ['eglCreatePbufferFromClientBuffer'],
  'arguments':
      'EGLDisplay dpy, EGLenum buftype, void* buffer, EGLConfig config, '
      'const EGLint* attrib_list', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglSurfaceAttrib'],
  'arguments':
      'EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglBindTexImage'],
  'arguments': 'EGLDisplay dpy, EGLSurface surface, EGLint buffer', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglReleaseTexImage'],
  'arguments': 'EGLDisplay dpy, EGLSurface surface, EGLint buffer', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglSwapInterval'],
  'arguments': 'EGLDisplay dpy, EGLint interval', },
{ 'return_type': 'EGLContext',
  'names': ['eglCreateContext'],
  'arguments': 'EGLDisplay dpy, EGLConfig config, EGLContext share_context, '
              'const EGLint* attrib_list', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglDestroyContext'],
  'arguments': 'EGLDisplay dpy, EGLContext ctx', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglMakeCurrent'],
  'arguments':
      'EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx', },
{ 'return_type': 'EGLContext',
  'names': ['eglGetCurrentContext'],
  'arguments': 'void', },
{ 'return_type': 'EGLSurface',
  'names': ['eglGetCurrentSurface'],
  'arguments': 'EGLint readdraw', },
{ 'return_type': 'EGLDisplay',
  'names': ['eglGetCurrentDisplay'],
  'arguments': 'void', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglQueryContext'],
  'arguments':
      'EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint* value', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglWaitGL'],
  'arguments': 'void', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglWaitNative'],
  'arguments': 'EGLint engine', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglSwapBuffers'],
  'arguments': 'EGLDisplay dpy, EGLSurface surface', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglCopyBuffers'],
  'arguments':
      'EGLDisplay dpy, EGLSurface surface, EGLNativePixmapType target', },
{ 'return_type': '__eglMustCastToProperFunctionPointerType',
  'names': ['eglGetProcAddress'],
  'arguments': 'const char* procname', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglPostSubBufferNV'],
  'arguments': 'EGLDisplay dpy, EGLSurface surface, '
    'EGLint x, EGLint y, EGLint width, EGLint height', },
{ 'return_type': 'EGLBoolean',
  'names': ['eglQuerySurfacePointerANGLE'],
  'arguments':
      'EGLDisplay dpy, EGLSurface surface, EGLint attribute, void** value', },
{ 'return_type': 'EGLSyncKHR',
  'versions': [{ 'name': 'eglCreateSyncKHR',
                 'extensions': ['EGL_KHR_fence_sync'] }],
  'arguments': 'EGLDisplay dpy, EGLenum type, const EGLint* attrib_list' },
{ 'return_type': 'EGLint',
  'versions': [{ 'name': 'eglClientWaitSyncKHR',
                 'extensions': ['EGL_KHR_fence_sync'] }],
  'arguments': 'EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, '
      'EGLTimeKHR timeout' },
{ 'return_type': 'EGLBoolean',
  'versions': [{ 'name': 'eglGetSyncAttribKHR',
                 'extensions': ['EGL_KHR_fence_sync'] }],
  'arguments': 'EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, '
      'EGLint* value' },
{ 'return_type': 'EGLBoolean',
  'versions': [{ 'name': 'eglDestroySyncKHR',
                 'extensions': ['EGL_KHR_fence_sync'] }],
  'arguments': 'EGLDisplay dpy, EGLSyncKHR sync' },
{ 'return_type': 'EGLBoolean',
  'names': ['eglGetSyncValuesCHROMIUM'],
  'arguments':
      'EGLDisplay dpy, EGLSurface surface, '
      'EGLuint64CHROMIUM* ust, EGLuint64CHROMIUM* msc, '
      'EGLuint64CHROMIUM* sbc', },
{ 'return_type': 'EGLint',
  'versions': [{ 'name': 'eglWaitSyncKHR',
                 'extensions': ['EGL_KHR_fence_sync'] }],
  'arguments': 'EGLDisplay dpy, EGLSyncKHR sync, EGLint flags' }
]

WGL_FUNCTIONS = [
{ 'return_type': 'HGLRC',
  'names': ['wglCreateContext'],
  'arguments': 'HDC hdc', },
{ 'return_type': 'HGLRC',
  'names': ['wglCreateLayerContext'],
  'arguments': 'HDC hdc, int iLayerPlane', },
{ 'return_type': 'BOOL',
  'names': ['wglCopyContext'],
  'arguments': 'HGLRC hglrcSrc, HGLRC hglrcDst, UINT mask', },
{ 'return_type': 'BOOL',
  'names': ['wglDeleteContext'],
  'arguments': 'HGLRC hglrc', },
{ 'return_type': 'HGLRC',
  'names': ['wglGetCurrentContext'],
  'arguments': '', },
{ 'return_type': 'HDC',
  'names': ['wglGetCurrentDC'],
  'arguments': '', },
{ 'return_type': 'BOOL',
  'names': ['wglMakeCurrent'],
  'arguments': 'HDC hdc, HGLRC hglrc', },
{ 'return_type': 'BOOL',
  'names': ['wglShareLists'],
  'arguments': 'HGLRC hglrc1, HGLRC hglrc2', },
{ 'return_type': 'BOOL',
  'names': ['wglSwapIntervalEXT'],
  'arguments': 'int interval', },
{ 'return_type': 'BOOL',
  'names': ['wglSwapLayerBuffers'],
  'arguments': 'HDC hdc, UINT fuPlanes', },
{ 'return_type': 'const char*',
  'names': ['wglGetExtensionsStringARB'],
  'arguments': 'HDC hDC', },
{ 'return_type': 'const char*',
  'names': ['wglGetExtensionsStringEXT'],
  'arguments': '', },
{ 'return_type': 'BOOL',
  'names': ['wglChoosePixelFormatARB'],
  'arguments':
      'HDC dc, const int* int_attrib_list, const float* float_attrib_list, '
      'UINT max_formats, int* formats, UINT* num_formats', },
{ 'return_type': 'HPBUFFERARB',
  'names': ['wglCreatePbufferARB'],
  'arguments': 'HDC hDC, int iPixelFormat, int iWidth, int iHeight, '
               'const int* piAttribList', },
{ 'return_type': 'HDC',
  'names': ['wglGetPbufferDCARB'],
  'arguments': 'HPBUFFERARB hPbuffer', },
{ 'return_type': 'int',
  'names': ['wglReleasePbufferDCARB'],
  'arguments': 'HPBUFFERARB hPbuffer, HDC hDC', },
{ 'return_type': 'BOOL',
  'names': ['wglDestroyPbufferARB'],
  'arguments': 'HPBUFFERARB hPbuffer', },
{ 'return_type': 'BOOL',
  'names': ['wglQueryPbufferARB'],
  'arguments': 'HPBUFFERARB hPbuffer, int iAttribute, int* piValue', },
]

GLX_FUNCTIONS = [
{ 'return_type': 'int',
  'names': ['glXWaitVideoSyncSGI'],
  'arguments': 'int divisor, int remainder, unsigned int* count', },
{ 'return_type': 'XVisualInfo*',
  'names': ['glXChooseVisual'],
  'arguments': 'Display* dpy, int screen, int* attribList', },
{ 'return_type': 'void',
  'names': ['glXCopySubBufferMESA'],
  'arguments': 'Display* dpy, GLXDrawable drawable, '
               'int x, int y, int width, int height', },
{ 'return_type': 'GLXContext',
  'names': ['glXCreateContext'],
  'arguments':
      'Display* dpy, XVisualInfo* vis, GLXContext shareList, int direct', },
{ 'return_type': 'void',
  'names': ['glXBindTexImageEXT'],
  'arguments':
      'Display* dpy, GLXDrawable drawable, int buffer, int* attribList', },
{ 'return_type': 'void',
  'names': ['glXReleaseTexImageEXT'],
  'arguments': 'Display* dpy, GLXDrawable drawable, int buffer', },
{ 'return_type': 'void',
  'names': ['glXDestroyContext'],
  'arguments': 'Display* dpy, GLXContext ctx', },
{ 'return_type': 'int',
  'names': ['glXMakeCurrent'],
  'arguments': 'Display* dpy, GLXDrawable drawable, GLXContext ctx', },
{ 'return_type': 'void',
  'names': ['glXCopyContext'],
  'arguments':
      'Display* dpy, GLXContext src, GLXContext dst, unsigned long mask', },
{ 'return_type': 'void',
  'names': ['glXSwapBuffers'],
  'arguments': 'Display* dpy, GLXDrawable drawable', },
{ 'return_type': 'GLXPixmap',
  'names': ['glXCreateGLXPixmap'],
  'arguments': 'Display* dpy, XVisualInfo* visual, Pixmap pixmap', },
{ 'return_type': 'void',
  'names': ['glXDestroyGLXPixmap'],
  'arguments': 'Display* dpy, GLXPixmap pixmap', },
{ 'return_type': 'int',
  'names': ['glXQueryExtension'],
  'arguments': 'Display* dpy, int* errorb, int* event', },
{ 'return_type': 'int',
  'names': ['glXQueryVersion'],
  'arguments': 'Display* dpy, int* maj, int* min', },
{ 'return_type': 'int',
  'names': ['glXIsDirect'],
  'arguments': 'Display* dpy, GLXContext ctx', },
{ 'return_type': 'int',
  'names': ['glXGetConfig'],
  'arguments': 'Display* dpy, XVisualInfo* visual, int attrib, int* value', },
{ 'return_type': 'GLXContext',
  'names': ['glXGetCurrentContext'],
  'arguments': 'void', },
{ 'return_type': 'GLXDrawable',
  'names': ['glXGetCurrentDrawable'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['glXWaitGL'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['glXWaitX'],
  'arguments': 'void', },
{ 'return_type': 'void',
  'names': ['glXUseXFont'],
  'arguments': 'Font font, int first, int count, int list', },
{ 'return_type': 'const char*',
  'names': ['glXQueryExtensionsString'],
  'arguments': 'Display* dpy, int screen', },
{ 'return_type': 'const char*',
  'names': ['glXQueryServerString'],
  'arguments': 'Display* dpy, int screen, int name', },
{ 'return_type': 'const char*',
  'names': ['glXGetClientString'],
  'arguments': 'Display* dpy, int name', },
{ 'return_type': 'Display*',
  'names': ['glXGetCurrentDisplay'],
  'arguments': 'void', },
{ 'return_type': 'GLXFBConfig*',
  'names': ['glXChooseFBConfig'],
  'arguments':
      'Display* dpy, int screen, const int* attribList, int* nitems', },
{ 'return_type': 'int',
  'names': ['glXGetFBConfigAttrib'],
  'arguments': 'Display* dpy, GLXFBConfig config, int attribute, int* value', },
{ 'return_type': 'GLXFBConfig*',
  'names': ['glXGetFBConfigs'],
  'arguments': 'Display* dpy, int screen, int* nelements', },
{ 'return_type': 'XVisualInfo*',
  'names': ['glXGetVisualFromFBConfig'],
  'arguments': 'Display* dpy, GLXFBConfig config', },
{ 'return_type': 'GLXWindow',
  'names': ['glXCreateWindow'],
  'arguments':
      'Display* dpy, GLXFBConfig config, Window win, const int* attribList', },
{ 'return_type': 'void',
  'names': ['glXDestroyWindow'],
  'arguments': 'Display* dpy, GLXWindow window', },
{ 'return_type': 'GLXPixmap',
  'names': ['glXCreatePixmap'],
  'arguments': 'Display* dpy, GLXFBConfig config, '
               'Pixmap pixmap, const int* attribList', },
{ 'return_type': 'void',
  'names': ['glXDestroyPixmap'],
  'arguments': 'Display* dpy, GLXPixmap pixmap', },
{ 'return_type': 'GLXPbuffer',
  'names': ['glXCreatePbuffer'],
  'arguments': 'Display* dpy, GLXFBConfig config, const int* attribList', },
{ 'return_type': 'void',
  'names': ['glXDestroyPbuffer'],
  'arguments': 'Display* dpy, GLXPbuffer pbuf', },
{ 'return_type': 'void',
  'names': ['glXQueryDrawable'],
  'arguments':
      'Display* dpy, GLXDrawable draw, int attribute, unsigned int* value', },
{ 'return_type': 'GLXContext',
  'names': ['glXCreateNewContext'],
  'arguments': 'Display* dpy, GLXFBConfig config, int renderType, '
               'GLXContext shareList, int direct', },
{ 'return_type': 'int',
  'names': ['glXMakeContextCurrent'],
  'arguments':
      'Display* dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx', },
{ 'return_type': 'GLXDrawable',
  'names': ['glXGetCurrentReadDrawable'],
  'arguments': 'void', },
{ 'return_type': 'int',
  'names': ['glXQueryContext'],
  'arguments': 'Display* dpy, GLXContext ctx, int attribute, int* value', },
{ 'return_type': 'void',
  'names': ['glXSelectEvent'],
  'arguments': 'Display* dpy, GLXDrawable drawable, unsigned long mask', },
{ 'return_type': 'void',
  'names': ['glXGetSelectedEvent'],
  'arguments': 'Display* dpy, GLXDrawable drawable, unsigned long* mask', },
{ 'return_type': 'void',
  'names': ['glXSwapIntervalMESA'],
  'arguments': 'unsigned int interval', },
{ 'return_type': 'void',
  'names': ['glXSwapIntervalEXT'],
  'arguments': 'Display* dpy, GLXDrawable drawable, int interval', },
{ 'return_type': 'GLXFBConfig',
  'names': ['glXGetFBConfigFromVisualSGIX'],
  'arguments': 'Display* dpy, XVisualInfo* visualInfo', },
{ 'return_type': 'GLXContext',
  'names': ['glXCreateContextAttribsARB'],
  'arguments':
      'Display* dpy, GLXFBConfig config, GLXContext share_context, int direct, '
      'const int* attrib_list', },
{ 'return_type': 'bool',
  'names': ['glXGetSyncValuesOML'],
  'arguments':
      'Display* dpy, GLXDrawable drawable, int64* ust, int64* msc, '
      'int64* sbc' },
{ 'return_type': 'bool',
  'names': ['glXGetMscRateOML'],
  'arguments':
      'Display* dpy, GLXDrawable drawable, int32* numerator, '
      'int32* denominator' },
]

FUNCTION_SETS = [
  [GL_FUNCTIONS, 'gl', [
      'GL/glext.h',
      'GLES2/gl2ext.h',
      # Files below are Chromium-specific and shipped with Chromium sources.
      'GL/glextchromium.h',
      'GLES2/gl2chromium.h',
      'GLES2/gl2extchromium.h'
  ], []],
  [OSMESA_FUNCTIONS, 'osmesa', [], []],
  [EGL_FUNCTIONS, 'egl', [
      'EGL/eglext.h',
      # Files below are Chromium-specific and shipped with Chromium sources.
      'EGL/eglextchromium.h',
    ],
    [
      'EGL_ANGLE_d3d_share_handle_client_buffer',
      'EGL_ANGLE_surface_d3d_texture_2d_share_handle',
    ],
  ],
  [WGL_FUNCTIONS, 'wgl', ['GL/wglext.h'], []],
  [GLX_FUNCTIONS, 'glx', ['GL/glx.h', 'GL/glxext.h'], []],
]

def GenerateHeader(file, functions, set_name, used_extensions):
  """Generates gl_bindings_autogen_x.h"""

  # Write file header.
  file.write(
"""// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This file is automatically generated.

#ifndef UI_GFX_GL_GL_BINDINGS_AUTOGEN_%(name)s_H_
#define UI_GFX_GL_GL_BINDINGS_AUTOGEN_%(name)s_H_

namespace gfx {

class GLContext;

""" % {'name': set_name.upper()})

  # Write typedefs for function pointer types. Always use the GL name for the
  # typedef.
  file.write('\n')
  for func in functions:
    file.write('typedef %s (GL_BINDING_CALL *%sProc)(%s);\n' %
        (func['return_type'], func['known_as'], func['arguments']))

  # Write declarations for booleans indicating which extensions are available.
  file.write('\n')
  file.write("struct Extensions%s {\n" % set_name.upper())
  for extension in sorted(used_extensions):
    file.write('  bool b_%s;\n' % extension)
  file.write('};\n')
  file.write('\n')

  # Write Procs struct.
  file.write("struct Procs%s {\n" % set_name.upper())
  for func in functions:
    file.write('  %sProc %sFn;\n' % (func['known_as'], func['known_as']))
  file.write('};\n')
  file.write('\n')

  # Write Api class.
  file.write(
"""class GL_EXPORT %(name)sApi {
 public:
  %(name)sApi();
  virtual ~%(name)sApi();

""" % {'name': set_name.upper()})
  for func in functions:
    file.write('  virtual %s %sFn(%s) = 0;\n' %
      (func['return_type'], func['known_as'], func['arguments']))
  file.write('};\n')
  file.write('\n')

  file.write( '}  // namespace gfx\n')

  # Write macros to invoke function pointers. Always use the GL name for the
  # macro.
  file.write('\n')
  for func in functions:
    file.write('#define %s ::gfx::g_current_%s_context->%sFn\n' %
        (func['known_as'], set_name.lower(), func['known_as']))

  file.write('\n')
  file.write('#endif  //  UI_GFX_GL_GL_BINDINGS_AUTOGEN_%s_H_\n' %
      set_name.upper())


def GenerateAPIHeader(file, functions, set_name):
  """Generates gl_bindings_api_autogen_x.h"""

  # Write file header.
  file.write(
"""// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This file is automatically generated.

""" % {'name': set_name.upper()})

  # Write API declaration.
  for func in functions:
    file.write('  virtual %s %sFn(%s) OVERRIDE;\n' %
      (func['return_type'], func['known_as'], func['arguments']))

  file.write('\n')


def GenerateMockHeader(file, functions, set_name):
  """Generates gl_mock_autogen_x.h"""

  # Write file header.
  file.write(
"""// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This file is automatically generated.

""" % {'name': set_name.upper()})

  # Write API declaration.
  for func in functions:
    args = func['arguments']
    if args == 'void':
      args = ''
    arg_count = 0
    if len(args):
      arg_count = func['arguments'].count(',') + 1
    file.write('  MOCK_METHOD%d(%s, %s(%s));\n' %
      (arg_count, func['known_as'][2:], func['return_type'], args))

  file.write('\n')


def GenerateSource(file, functions, set_name, used_extensions):
  """Generates gl_bindings_autogen_x.cc"""

  # Write file header.
  file.write(
"""// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This file is automatically generated.

#include <string>
#include "base/debug/trace_event.h"
#include "gpu/command_buffer/common/gles2_cmd_utils.h"
#include "ui/gl/gl_bindings.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_implementation.h"
#include "ui/gl/gl_version_info.h"
#include "ui/gl/gl_%s_api_implementation.h"

using gpu::gles2::GLES2Util;

namespace gfx {
""" % set_name.lower())

  file.write('\n')
  file.write('static bool g_debugBindingsInitialized;\n')
  file.write('Driver%s g_driver_%s;\n' % (set_name.upper(), set_name.lower()))
  file.write('\n')

  # Write stub functions that take the place of some functions before a context
  # is initialized. This is done to provide clear asserts on debug build and to
  # avoid crashing in case of a bug on release build.
  file.write('\n')
  for func in functions:
    unique_names = set([version['name'] for version in func['versions']])
    if len(unique_names) > 1:
      file.write('%s %sNotBound(%s) {\n' %
          (func['return_type'], func['known_as'], func['arguments']))
      file.write('  NOTREACHED();\n')
      return_type = func['return_type'].lower()
      # Returning 0 works for booleans, integers and pointers.
      if return_type != 'void':
        file.write('  return 0;\n')
      file.write('}\n')

  # Write function to initialize the function pointers that are always the same
  # and to initialize bindings where choice of the function depends on the
  # extension string or the GL version to point to stub functions.
  file.write('\n')
  file.write('void Driver%s::InitializeStaticBindings() {\n' %
             set_name.upper())

  def WriteFuncBinding(file, known_as, version_name):
    file.write(
        '  fn.%sFn = reinterpret_cast<%sProc>(GetGLProcAddress("%s"));\n' %
        (known_as, known_as, version_name))

  for func in functions:
    unique_names = set([version['name'] for version in func['versions']])
    if len(unique_names) == 1:
      WriteFuncBinding(file, func['known_as'], func['known_as'])
    else:
      file.write('  fn.%sFn = reinterpret_cast<%sProc>(%sNotBound);\n' %
          (func['known_as'], func['known_as'], func['known_as']))

  file.write('}\n')
  file.write('\n')

  # Write function to initialize bindings where choice of the function depends
  # on the extension string or the GL version.
  file.write("""void Driver%s::InitializeDynamicBindings(GLContext* context) {
  DCHECK(context && context->IsCurrent(NULL));
  const GLVersionInfo* ver ALLOW_UNUSED = context->GetVersionInfo();
  std::string extensions ALLOW_UNUSED = context->GetExtensions();
  extensions += " ";

""" % set_name.upper())
  for extension in sorted(used_extensions):
    # Extra space at the end of the extension name is intentional, it is used
    # as a separator
    file.write('  ext.b_%s = extensions.find("%s ") != std::string::npos;\n' %
        (extension, extension))

  def WrapOr(cond):
    if ' || ' in cond:
      return '(%s)' % cond
    return cond

  def WrapAnd(cond):
    if ' && ' in cond:
      return '(%s)' % cond
    return cond

  def VersionCondition(version):
    conditions = []
    if 'gl_versions' in version:
      gl_versions = version['gl_versions']
      version_cond = ' || '.join(['ver->is_%s' % gl for gl in gl_versions])
      conditions.append(WrapOr(version_cond))
    if 'extensions' in version and version['extensions']:
      ext_cond = ' || '.join(['ext.b_%s' % e for e in version['extensions']])
      conditions.append(WrapOr(ext_cond))
    return ' && '.join(conditions)

  def WriteConditionalFuncBinding(file, func):
    # Functions with only one version are always bound unconditionally
    assert len(func['versions']) > 1
    known_as = func['known_as']
    i = 0
    first_version = True
    while i < len(func['versions']):
      version = func['versions'][i]
      cond = VersionCondition(version)
      combined_conditions = [WrapAnd(cond)]
      last_version = i + 1 == len(func['versions'])
      while not last_version and \
          func['versions'][i + 1]['name'] == version['name']:
        i += 1
        combinable_cond = VersionCondition(func['versions'][i])
        combined_conditions.append(WrapAnd(combinable_cond))
        last_version = i + 1 == len(func['versions'])
      if len(combined_conditions) > 1:
        if [1 for cond in combined_conditions if cond == '']:
          cond = ''
        else:
          cond = ' || '.join(combined_conditions)
      # Don't make the last possible binding conditional on anything else but
      # that the function isn't already bound to avoid verbose specification
      # of functions which have both ARB and core versions with the same name,
      # and to be able to bind to mock extension functions in unit tests which
      # call InitializeDynamicGLBindings with a stub context that doesn't have
      # extensions in its extension string.
      # TODO(oetuaho@nvidia.com): Get rid of the fallback.
      # http://crbug.com/325668
      if cond != '' and not last_version:
        if not first_version:
          file.write('  if (!fn.%sFn && (%s))\n  ' % (known_as, cond))
        else:
          file.write('  if (%s)\n  ' % cond)
      elif not first_version:
        file.write('  if (!fn.%sFn)\n  ' % known_as)
      WriteFuncBinding(file, known_as, version['name'])
      i += 1
      first_version = False

  for func in functions:
    unique_names = set([version['name'] for version in func['versions']])
    if len(unique_names) > 1:
      file.write('\n')
      file.write('  fn.%sFn = 0;\n' % func['known_as'])
      file.write('  debug_fn.%sFn = 0;\n' % func['known_as'])
      WriteConditionalFuncBinding(file, func)

  # Some new function pointers have been added, so update them in debug bindings
  file.write('\n')
  file.write('  if (g_debugBindingsInitialized)\n')
  file.write('    InitializeDebugBindings();\n')
  file.write('}\n')
  file.write('\n')

  # Write logging wrappers for each function.
  file.write('extern "C" {\n')
  for func in functions:
    return_type = func['return_type']
    arguments = func['arguments']
    file.write('\n')
    file.write('static %s GL_BINDING_CALL Debug_%s(%s) {\n' %
        (return_type, func['known_as'], arguments))
    argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', arguments)
    argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', argument_names)
    log_argument_names = re.sub(
        r'const char\* ([a-zA-Z0-9_]+)', r'CONSTCHAR_\1', arguments)
    log_argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\* ([a-zA-Z0-9_]+)',
        r'CONSTVOID_\2', log_argument_names)
    log_argument_names = re.sub(
        r'(?<!E)GLenum ([a-zA-Z0-9_]+)', r'GLenum_\1', log_argument_names)
    log_argument_names = re.sub(
        r'(?<!E)GLboolean ([a-zA-Z0-9_]+)', r'GLboolean_\1', log_argument_names)
    log_argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2',
        log_argument_names)
    log_argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2',
        log_argument_names)
    log_argument_names = re.sub(
        r'CONSTVOID_([a-zA-Z0-9_]+)',
        r'static_cast<const void*>(\1)', log_argument_names)
    log_argument_names = re.sub(
        r'CONSTCHAR_([a-zA-Z0-9_]+)', r'\1', log_argument_names)
    log_argument_names = re.sub(
        r'GLenum_([a-zA-Z0-9_]+)', r'GLES2Util::GetStringEnum(\1)',
        log_argument_names)
    log_argument_names = re.sub(
        r'GLboolean_([a-zA-Z0-9_]+)', r'GLES2Util::GetStringBool(\1)',
        log_argument_names)
    log_argument_names = log_argument_names.replace(',', ' << ", " <<')
    if argument_names == 'void' or argument_names == '':
      argument_names = ''
      log_argument_names = ''
    else:
      log_argument_names = " << " + log_argument_names
    function_name = func['known_as']
    if return_type == 'void':
      file.write('  GL_SERVICE_LOG("%s" << "(" %s << ")");\n' %
          (function_name, log_argument_names))
      file.write('  g_driver_%s.debug_fn.%sFn(%s);\n' %
          (set_name.lower(), function_name, argument_names))
      if 'logging_code' in func:
        file.write("%s\n" % func['logging_code'])
    else:
      file.write('  GL_SERVICE_LOG("%s" << "(" %s << ")");\n' %
          (function_name, log_argument_names))
      file.write('  %s result = g_driver_%s.debug_fn.%sFn(%s);\n' %
          (return_type, set_name.lower(), function_name, argument_names))
      if 'logging_code' in func:
        file.write("%s\n" % func['logging_code'])
      else:
        file.write('  GL_SERVICE_LOG("GL_RESULT: " << result);\n')
      file.write('  return result;\n')
    file.write('}\n')
  file.write('}  // extern "C"\n')

  # Write function to initialize the debug function pointers.
  file.write('\n')
  file.write('void Driver%s::InitializeDebugBindings() {\n' %
             set_name.upper())
  for func in functions:
    first_name = func['known_as']
    file.write('  if (!debug_fn.%sFn) {\n' % first_name)
    file.write('    debug_fn.%sFn = fn.%sFn;\n' % (first_name, first_name))
    file.write('    fn.%sFn = Debug_%s;\n' % (first_name, first_name))
    file.write('  }\n')
  file.write('  g_debugBindingsInitialized = true;\n')
  file.write('}\n')

  # Write function to clear all function pointers.
  file.write('\n')
  file.write("""void Driver%s::ClearBindings() {
  memset(this, 0, sizeof(*this));
}
""" % set_name.upper())

  def MakeArgNames(arguments):
    argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', arguments)
    argument_names = re.sub(
        r'(const )?[a-zA-Z0-9_]+\** ([a-zA-Z0-9_]+)', r'\2', argument_names)
    if argument_names == 'void' or argument_names == '':
      argument_names = ''
    return argument_names

  # Write GLApiBase functions
  for func in functions:
    function_name = func['known_as']
    return_type = func['return_type']
    arguments = func['arguments']
    file.write('\n')
    file.write('%s %sApiBase::%sFn(%s) {\n' %
        (return_type, set_name.upper(), function_name, arguments))
    argument_names = MakeArgNames(arguments)
    if return_type == 'void':
      file.write('  driver_->fn.%sFn(%s);\n' %
          (function_name, argument_names))
    else:
      file.write('  return driver_->fn.%sFn(%s);\n' %
          (function_name, argument_names))
    file.write('}\n')

  # Write TraceGLApi functions
  for func in functions:
    function_name = func['known_as']
    return_type = func['return_type']
    arguments = func['arguments']
    file.write('\n')
    file.write('%s Trace%sApi::%sFn(%s) {\n' %
        (return_type, set_name.upper(), function_name, arguments))
    argument_names = MakeArgNames(arguments)
    file.write('  TRACE_EVENT_BINARY_EFFICIENT0("gpu", "TraceGLAPI::%s")\n' %
               function_name)
    if return_type == 'void':
      file.write('  %s_api_->%sFn(%s);\n' %
          (set_name.lower(), function_name, argument_names))
    else:
      file.write('  return %s_api_->%sFn(%s);\n' %
          (set_name.lower(), function_name, argument_names))
    file.write('}\n')

  # Write NoContextGLApi functions
  if set_name.upper() == "GL":
    for func in functions:
      function_name = func['known_as']
      return_type = func['return_type']
      arguments = func['arguments']
      file.write('\n')
      file.write('%s NoContextGLApi::%sFn(%s) {\n' %
          (return_type, function_name, arguments))
      argument_names = MakeArgNames(arguments)
      no_context_error = "Trying to call %s() without current GL context" % function_name
      file.write('  NOTREACHED() <<  "%s";\n' % no_context_error)
      file.write('  LOG(ERROR) <<  "%s";\n' % no_context_error)
      default_value = { 'GLenum': 'static_cast<GLenum>(0)',
                        'GLuint': '0U',
                        'GLint': '0',
                        'GLboolean': 'GL_FALSE',
                        'GLbyte': '0',
                        'GLubyte': '0',
                        'GLbutfield': '0',
                        'GLushort': '0',
                        'GLsizei': '0',
                        'GLfloat': '0.0f',
                        'GLdouble': '0.0',
                        'GLsync': 'NULL'}
      if return_type.endswith('*'):
        file.write('  return NULL;\n')
      elif return_type != 'void':
        file.write('  return %s;\n' % default_value[return_type])
      file.write('}\n')

  file.write('\n')
  file.write('}  // namespace gfx\n')


def GetUniquelyNamedFunctions(functions):
  uniquely_named_functions = {}

  for func in functions:
    for version in func['versions']:
      uniquely_named_functions[version['name']] = ({
        'name': version['name'],
        'return_type': func['return_type'],
        'arguments': func['arguments'],
        'known_as': func['known_as']
      })
  return uniquely_named_functions


def GenerateMockBindingsHeader(file, functions):
  """Headers for functions that invoke MockGLInterface members"""

  file.write(
"""// Copyright (c) 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This file is automatically generated.

""")
  uniquely_named_functions = GetUniquelyNamedFunctions(functions)

  for key in sorted(uniquely_named_functions.iterkeys()):
    func = uniquely_named_functions[key]
    file.write('static %s GL_BINDING_CALL Mock_%s(%s);\n' %
        (func['return_type'], func['name'], func['arguments']))


def GenerateMockBindingsSource(file, functions):
  """Generates functions that invoke MockGLInterface members and a
  GetGLProcAddress function that returns addresses to those functions."""

  file.write(
"""// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// This file is automatically generated.

#include <string.h>

#include "ui/gl/gl_mock.h"

namespace gfx {

// This is called mainly to prevent the compiler combining the code of mock
// functions with identical contents, so that their function pointers will be
// different.
void MakeFunctionUnique(const char *func_name) {
    VLOG(2) << "Calling mock " << func_name;
}

""")
  # Write functions that trampoline into the set MockGLInterface instance.
  uniquely_named_functions = GetUniquelyNamedFunctions(functions)
  sorted_function_names = sorted(uniquely_named_functions.iterkeys())

  for key in sorted_function_names:
    func = uniquely_named_functions[key]
    file.write('\n')
    file.write('%s GL_BINDING_CALL MockGLInterface::Mock_%s(%s) {\n' %
        (func['return_type'], func['name'], func['arguments']))
    file.write('  MakeFunctionUnique("%s");\n' % func['name'])
    arg_re = r'(const )?[a-zA-Z0-9]+((\s*const\s*)?\*)* ([a-zA-Z0-9]+)'
    argument_names = re.sub(arg_re, r'\4', func['arguments'])
    if argument_names == 'void':
      argument_names = ''
    function_name = func['known_as'][2:]
    if func['return_type'] == 'void':
      file.write('  interface_->%s(%s);\n' %
          (function_name, argument_names))
    else:
      file.write('  return interface_->%s(%s);\n' %
          (function_name, argument_names))
    file.write('}\n')

  # Write an 'invalid' function to catch code calling through uninitialized
  # function pointers or trying to interpret the return value of
  # GLProcAddress().
  file.write('\n')
  file.write('static void MockInvalidFunction() {\n')
  file.write('  NOTREACHED();\n')
  file.write('}\n')

  # Write a function to lookup a mock GL function based on its name.
  file.write('\n')
  file.write('void* GL_BINDING_CALL ' +
      'MockGLInterface::GetGLProcAddress(const char* name) {\n')
  for key in sorted_function_names:
    name = uniquely_named_functions[key]['name']
    file.write('  if (strcmp(name, "%s") == 0)\n' % name)
    file.write('    return reinterpret_cast<void*>(Mock_%s);\n' % name)
  # Always return a non-NULL pointer like some EGL implementations do.
  file.write('  return reinterpret_cast<void*>(&MockInvalidFunction);\n')
  file.write('}\n')

  file.write('\n')
  file.write('}  // namespace gfx\n')


def ParseExtensionFunctionsFromHeader(header_file):
  """Parse a C extension header file and return a map from extension names to
  a list of functions.

  Args:
    header_file: Line-iterable C header file.
  Returns:
    Map of extension name => functions.
  """
  extension_start = re.compile(
      r'#ifndef ((?:GL|EGL|WGL|GLX)_[A-Z]+_[a-zA-Z]\w+)')
  extension_function = re.compile(r'.+\s+([a-z]+\w+)\s*\(')
  typedef = re.compile(r'typedef .*')
  macro_start = re.compile(r'^#(if|ifdef|ifndef).*')
  macro_end = re.compile(r'^#endif.*')
  macro_depth = 0
  current_extension = None
  current_extension_depth = 0
  extensions = collections.defaultdict(lambda: [])
  for line in header_file:
    if macro_start.match(line):
      macro_depth += 1
    elif macro_end.match(line):
      macro_depth -= 1
      if macro_depth < current_extension_depth:
        current_extension = None
    match = extension_start.match(line)
    if match:
      current_extension = match.group(1)
      current_extension_depth = macro_depth
      assert current_extension not in extensions, \
          "Duplicate extension: " + current_extension
    match = extension_function.match(line)
    if match and current_extension and not typedef.match(line):
      extensions[current_extension].append(match.group(1))
  return extensions


def GetExtensionFunctions(extension_headers):
  """Parse extension functions from a list of header files.

  Args:
    extension_headers: List of header file names.
  Returns:
    Map of extension name => list of functions.
  """
  extensions = {}
  for header in extension_headers:
    extensions.update(ParseExtensionFunctionsFromHeader(open(header)))
  return extensions


def GetFunctionToExtensionMap(extensions):
  """Construct map from a function names to extensions which define the
  function.

  Args:
    extensions: Map of extension name => functions.
  Returns:
    Map of function name => extension name.
  """
  function_to_extensions = {}
  for extension, functions in extensions.items():
    for function in functions:
      if not function in function_to_extensions:
        function_to_extensions[function] = []
      function_to_extensions[function].append(extension)
  return function_to_extensions


def LooksLikeExtensionFunction(function):
  """Heuristic to see if a function name is consistent with extension function
  naming."""
  vendor = re.match(r'\w+?([A-Z][A-Z]+)$', function)
  return vendor is not None and not vendor.group(1) in ['GL', 'API', 'DC']


def FillExtensionsFromHeaders(functions, extension_headers, extra_extensions):
  """Determine which functions belong to extensions based on extension headers,
  and fill in this information to the functions table for functions that don't
  already have the information.

  Args:
    functions: List of (return type, function versions, arguments).
    extension_headers: List of header file names.
    extra_extensions: Extensions to add to the list.
  Returns:
    Set of used extensions.
  """
  # Parse known extensions.
  extensions = GetExtensionFunctions(extension_headers)
  functions_to_extensions = GetFunctionToExtensionMap(extensions)

  # Fill in the extension information.
  used_extensions = set()
  for func in functions:
    for version in func['versions']:
      name = version['name']
      # Make sure we know about all extensions and extension functions.
      if 'extensions' in version:
        used_extensions.update(version['extensions'])
      elif name in functions_to_extensions:
        # If there are multiple versions with the same name, assume that they
        # already have all the correct conditions, we can't just blindly add
        # the same extension conditions to all of them
        if len([v for v in func['versions'] if v['name'] == name]) == 1:
          version['extensions'] = functions_to_extensions[name]
          used_extensions.update(version['extensions'])
      elif LooksLikeExtensionFunction(name):
        raise RuntimeError('%s looks like an extension function but does not '
            'belong to any of the known extensions.' % name)

  # Add extensions that do not have any functions.
  used_extensions.update(extra_extensions)

  return used_extensions


def ResolveHeader(header, header_paths):
  paths = header_paths.split(':')

  for path in paths:
    result = os.path.join(path, header)
    if not os.path.isabs(path):
      result = os.path.relpath(os.path.join(os.getcwd(), result), os.getcwd())
    if os.path.exists(result):
      # Always use forward slashes as path separators. Otherwise backslashes
      # may be incorrectly interpreted as escape characters.
      return result.replace(os.path.sep, '/')

  raise Exception('Header %s not found.' % header)


def main(argv):
  """This is the main function."""

  parser = optparse.OptionParser()
  parser.add_option('--inputs', action='store_true')
  parser.add_option('--header-paths')

  options, args = parser.parse_args(argv)

  if options.inputs:
    for [_, _, headers, _] in FUNCTION_SETS:
      for header in headers:
        print ResolveHeader(header, options.header_paths)
    return 0

  directory = '.'
  if len(args) >= 1:
    directory = args[0]

  for [functions, set_name, extension_headers, extensions] in FUNCTION_SETS:
    # Function names can be specified in two ways (list of unique names or list
    # of versions with different binding conditions). Fill in the data to the
    # versions list in case it is missing, so that can be used from here on:
    for func in functions:
      assert 'versions' in func or 'names' in func, 'Function with no names'
      if 'versions' not in func:
        func['versions'] = [{'name': n} for n in func['names']]
      # Use the first version's name unless otherwise specified
      if 'known_as' not in func:
        func['known_as'] = func['versions'][0]['name']
      # Make sure that 'names' is not accidentally used instead of 'versions'
      if 'names' in func:
        del func['names']

    extension_headers = [ResolveHeader(h, options.header_paths)
                         for h in extension_headers]
    used_extensions = FillExtensionsFromHeaders(
        functions, extension_headers, extensions)

    header_file = open(
        os.path.join(directory, 'gl_bindings_autogen_%s.h' % set_name), 'wb')
    GenerateHeader(header_file, functions, set_name, used_extensions)
    header_file.close()

    header_file = open(
        os.path.join(directory, 'gl_bindings_api_autogen_%s.h' % set_name),
        'wb')
    GenerateAPIHeader(header_file, functions, set_name)
    header_file.close()

    source_file = open(
        os.path.join(directory, 'gl_bindings_autogen_%s.cc' % set_name), 'wb')
    GenerateSource(source_file, functions, set_name, used_extensions)
    source_file.close()

  header_file = open(
      os.path.join(directory, 'gl_mock_autogen_gl.h'), 'wb')
  GenerateMockHeader(header_file, GL_FUNCTIONS, 'gl')
  header_file.close()

  header_file = open(os.path.join(directory, 'gl_bindings_autogen_mock.h'),
                     'wb')
  GenerateMockBindingsHeader(header_file, GL_FUNCTIONS)
  header_file.close()

  source_file = open(os.path.join(directory, 'gl_bindings_autogen_mock.cc'),
                     'wb')
  GenerateMockBindingsSource(source_file, GL_FUNCTIONS)
  source_file.close()
  return 0


if __name__ == '__main__':
  sys.exit(main(sys.argv[1:]))