gl_bindings: add support for more extensions

ui/gl/gl_bindings_autogen_gl.cc

 // Copyright 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 auto-generated from
 // ui/gl/generate_bindings.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 487 matching lines @@
   ext.b_GL_ARB_instanced_arrays =
       extensions.find("GL_ARB_instanced_arrays ") != std::string::npos;
   ext.b_GL_ARB_map_buffer_range =
       extensions.find("GL_ARB_map_buffer_range ") != std::string::npos;
   ext.b_GL_ARB_occlusion_query =
       extensions.find("GL_ARB_occlusion_query ") != std::string::npos;
   ext.b_GL_ARB_program_interface_query =
       extensions.find("GL_ARB_program_interface_query ") != std::string::npos;
   ext.b_GL_ARB_robustness =
       extensions.find("GL_ARB_robustness ") != std::string::npos;
+  ext.b_GL_ARB_sampler_objects =
+      extensions.find("GL_ARB_sampler_objects ") != std::string::npos;
   ext.b_GL_ARB_shader_image_load_store =
       extensions.find("GL_ARB_shader_image_load_store ") != std::string::npos;
   ext.b_GL_ARB_sync = extensions.find("GL_ARB_sync ") != std::string::npos;
   ext.b_GL_ARB_texture_storage =
       extensions.find("GL_ARB_texture_storage ") != std::string::npos;
   ext.b_GL_ARB_timer_query =
       extensions.find("GL_ARB_timer_query ") != std::string::npos;
+  ext.b_GL_ARB_transform_feedback2 =
+      extensions.find("GL_ARB_transform_feedback2 ") != std::string::npos;
   ext.b_GL_ARB_vertex_array_object =
       extensions.find("GL_ARB_vertex_array_object ") != std::string::npos;
   ext.b_GL_CHROMIUM_bind_uniform_location =
       extensions.find("GL_CHROMIUM_bind_uniform_location ") !=
       std::string::npos;
   ext.b_GL_CHROMIUM_gles_depth_binding_hack =
       extensions.find("GL_CHROMIUM_gles_depth_binding_hack ") !=
       std::string::npos;
   ext.b_GL_CHROMIUM_glgetstringi_hack =
       extensions.find("GL_CHROMIUM_glgetstringi_hack ") != std::string::npos;
@@ skipping 25 matching lines @@
   ext.b_GL_EXT_occlusion_query_boolean =
       extensions.find("GL_EXT_occlusion_query_boolean ") != std::string::npos;
   ext.b_GL_EXT_robustness =
       extensions.find("GL_EXT_robustness ") != std::string::npos;
   ext.b_GL_EXT_shader_image_load_store =
       extensions.find("GL_EXT_shader_image_load_store ") != std::string::npos;
   ext.b_GL_EXT_texture_storage =
       extensions.find("GL_EXT_texture_storage ") != std::string::npos;
   ext.b_GL_EXT_timer_query =
       extensions.find("GL_EXT_timer_query ") != std::string::npos;
+  ext.b_GL_EXT_transform_feedback =
+      extensions.find("GL_EXT_transform_feedback ") != std::string::npos;
   ext.b_GL_EXT_unpack_subimage =
       extensions.find("GL_EXT_unpack_subimage ") != std::string::npos;
   ext.b_GL_IMG_multisampled_render_to_texture =
       extensions.find("GL_IMG_multisampled_render_to_texture ") !=
       std::string::npos;
   ext.b_GL_INTEL_framebuffer_CMAA =
       extensions.find("GL_INTEL_framebuffer_CMAA ") != std::string::npos;
   ext.b_GL_KHR_blend_equation_advanced =
       extensions.find("GL_KHR_blend_equation_advanced ") != std::string::npos;
   ext.b_GL_KHR_robustness =
@@ skipping 32 matching lines @@
              ext.b_GL_EXT_occlusion_query_boolean) {
     fn.glBeginQueryFn =
         reinterpret_cast<glBeginQueryProc>(GetGLProcAddress("glBeginQueryEXT"));
   }
 
   debug_fn.glBeginTransformFeedbackFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glBeginTransformFeedbackFn =
         reinterpret_cast<glBeginTransformFeedbackProc>(
             GetGLProcAddress("glBeginTransformFeedback"));
+  } else if (ext.b_GL_EXT_transform_feedback) {
+    fn.glBeginTransformFeedbackFn =
+        reinterpret_cast<glBeginTransformFeedbackProc>(
+            GetGLProcAddress("glBeginTransformFeedbackEXT"));
   }
 
   debug_fn.glBindBufferBaseFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glBindBufferBaseFn = reinterpret_cast<glBindBufferBaseProc>(
         GetGLProcAddress("glBindBufferBase"));
+  } else if (ext.b_GL_EXT_transform_feedback) {
+    fn.glBindBufferBaseFn = reinterpret_cast<glBindBufferBaseProc>(
+        GetGLProcAddress("glBindBufferBaseEXT"));
   }
 
   debug_fn.glBindBufferRangeFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glBindBufferRangeFn = reinterpret_cast<glBindBufferRangeProc>(
         GetGLProcAddress("glBindBufferRange"));
+  } else if (ext.b_GL_EXT_transform_feedback) {
+    fn.glBindBufferRangeFn = reinterpret_cast<glBindBufferRangeProc>(
+        GetGLProcAddress("glBindBufferRangeEXT"));
   }
 
   debug_fn.glBindFragDataLocationFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ext.b_GL_ARB_blend_func_extended) {
     fn.glBindFragDataLocationFn = reinterpret_cast<glBindFragDataLocationProc>(
         GetGLProcAddress("glBindFragDataLocation"));
   } else if (ext.b_GL_EXT_gpu_shader4 || ext.b_GL_EXT_blend_func_extended) {
     fn.glBindFragDataLocationFn = reinterpret_cast<glBindFragDataLocationProc>(
         GetGLProcAddress("glBindFragDataLocationEXT"));
   }
@@ skipping 31 matching lines @@
   debug_fn.glBindRenderbufferEXTFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->is_es) {
     fn.glBindRenderbufferEXTFn = reinterpret_cast<glBindRenderbufferEXTProc>(
         GetGLProcAddress("glBindRenderbuffer"));
   } else if (ext.b_GL_EXT_framebuffer_object) {
     fn.glBindRenderbufferEXTFn = reinterpret_cast<glBindRenderbufferEXTProc>(
         GetGLProcAddress("glBindRenderbufferEXT"));
   }
 
   debug_fn.glBindSamplerFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glBindSamplerFn =
         reinterpret_cast<glBindSamplerProc>(GetGLProcAddress("glBindSampler"));
   }
 
   debug_fn.glBindTransformFeedbackFn = 0;
-  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u)) {
+  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u) ||
+      ext.b_GL_ARB_transform_feedback2) {
     fn.glBindTransformFeedbackFn =
         reinterpret_cast<glBindTransformFeedbackProc>(
             GetGLProcAddress("glBindTransformFeedback"));
   }
 
   debug_fn.glBindUniformLocationCHROMIUMFn = 0;
   if (ext.b_GL_CHROMIUM_bind_uniform_location) {
     fn.glBindUniformLocationCHROMIUMFn =
         reinterpret_cast<glBindUniformLocationCHROMIUMProc>(
             GetGLProcAddress("glBindUniformLocationCHROMIUM"));
@@ skipping 197 matching lines @@
     fn.glDeleteRenderbuffersEXTFn =
         reinterpret_cast<glDeleteRenderbuffersEXTProc>(
             GetGLProcAddress("glDeleteRenderbuffers"));
   } else if (ext.b_GL_EXT_framebuffer_object) {
     fn.glDeleteRenderbuffersEXTFn =
         reinterpret_cast<glDeleteRenderbuffersEXTProc>(
             GetGLProcAddress("glDeleteRenderbuffersEXT"));
   }
 
   debug_fn.glDeleteSamplersFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glDeleteSamplersFn = reinterpret_cast<glDeleteSamplersProc>(
         GetGLProcAddress("glDeleteSamplers"));
   }
 
   debug_fn.glDeleteSyncFn = 0;
   if (ver->IsAtLeastGL(3u, 2u) || ver->IsAtLeastGLES(3u, 0u) ||
       ext.b_GL_ARB_sync) {
     fn.glDeleteSyncFn =
         reinterpret_cast<glDeleteSyncProc>(GetGLProcAddress("glDeleteSync"));
   }
 
   debug_fn.glDeleteTransformFeedbacksFn = 0;
-  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u)) {
+  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u) ||
+      ext.b_GL_ARB_transform_feedback2) {
     fn.glDeleteTransformFeedbacksFn =
         reinterpret_cast<glDeleteTransformFeedbacksProc>(
             GetGLProcAddress("glDeleteTransformFeedbacks"));
   }
 
   debug_fn.glDeleteVertexArraysOESFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u) ||
       ext.b_GL_ARB_vertex_array_object) {
     fn.glDeleteVertexArraysOESFn =
         reinterpret_cast<glDeleteVertexArraysOESProc>(
@@ skipping 99 matching lines @@
   } else if (ext.b_GL_EXT_disjoint_timer_query ||
              ext.b_GL_EXT_occlusion_query_boolean) {
     fn.glEndQueryFn =
         reinterpret_cast<glEndQueryProc>(GetGLProcAddress("glEndQueryEXT"));
   }
 
   debug_fn.glEndTransformFeedbackFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glEndTransformFeedbackFn = reinterpret_cast<glEndTransformFeedbackProc>(
         GetGLProcAddress("glEndTransformFeedback"));
+  } else if (ext.b_GL_EXT_transform_feedback) {
+    fn.glEndTransformFeedbackFn = reinterpret_cast<glEndTransformFeedbackProc>(
+        GetGLProcAddress("glEndTransformFeedbackEXT"));
   }
 
   debug_fn.glFenceSyncFn = 0;
   if (ver->IsAtLeastGL(3u, 2u) || ver->IsAtLeastGLES(3u, 0u) ||
       ext.b_GL_ARB_sync) {
     fn.glFenceSyncFn =
         reinterpret_cast<glFenceSyncProc>(GetGLProcAddress("glFenceSync"));
   }
 
   debug_fn.glFinishFenceAPPLEFn = 0;
@@ skipping 110 matching lines @@
   debug_fn.glGenRenderbuffersEXTFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->is_es) {
     fn.glGenRenderbuffersEXTFn = reinterpret_cast<glGenRenderbuffersEXTProc>(
         GetGLProcAddress("glGenRenderbuffers"));
   } else if (ext.b_GL_EXT_framebuffer_object) {
     fn.glGenRenderbuffersEXTFn = reinterpret_cast<glGenRenderbuffersEXTProc>(
         GetGLProcAddress("glGenRenderbuffersEXT"));
   }
 
   debug_fn.glGenSamplersFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glGenSamplersFn =
         reinterpret_cast<glGenSamplersProc>(GetGLProcAddress("glGenSamplers"));
   }
 
   debug_fn.glGenTransformFeedbacksFn = 0;
-  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u)) {
+  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u) ||
+      ext.b_GL_ARB_transform_feedback2) {
     fn.glGenTransformFeedbacksFn =
         reinterpret_cast<glGenTransformFeedbacksProc>(
             GetGLProcAddress("glGenTransformFeedbacks"));
   }
 
   debug_fn.glGenVertexArraysOESFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u) ||
       ext.b_GL_ARB_vertex_array_object) {
     fn.glGenVertexArraysOESFn = reinterpret_cast<glGenVertexArraysOESProc>(
         GetGLProcAddress("glGenVertexArrays"));
@@ skipping 201 matching lines @@
     fn.glGetRenderbufferParameterivEXTFn =
         reinterpret_cast<glGetRenderbufferParameterivEXTProc>(
             GetGLProcAddress("glGetRenderbufferParameteriv"));
   } else if (ext.b_GL_EXT_framebuffer_object) {
     fn.glGetRenderbufferParameterivEXTFn =
         reinterpret_cast<glGetRenderbufferParameterivEXTProc>(
             GetGLProcAddress("glGetRenderbufferParameterivEXT"));
   }
 
   debug_fn.glGetSamplerParameterfvFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glGetSamplerParameterfvFn =
         reinterpret_cast<glGetSamplerParameterfvProc>(
             GetGLProcAddress("glGetSamplerParameterfv"));
   }
 
   debug_fn.glGetSamplerParameterivFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glGetSamplerParameterivFn =
         reinterpret_cast<glGetSamplerParameterivProc>(
             GetGLProcAddress("glGetSamplerParameteriv"));
   }
 
   debug_fn.glGetShaderPrecisionFormatFn = 0;
   if (ver->IsAtLeastGL(4u, 1u) || ver->is_es) {
     fn.glGetShaderPrecisionFormatFn =
         reinterpret_cast<glGetShaderPrecisionFormatProc>(
             GetGLProcAddress("glGetShaderPrecisionFormat"));
@@ skipping 18 matching lines @@
     fn.glGetTexLevelParameterivFn =
         reinterpret_cast<glGetTexLevelParameterivProc>(
             GetGLProcAddress("glGetTexLevelParameteriv"));
   }
 
   debug_fn.glGetTransformFeedbackVaryingFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glGetTransformFeedbackVaryingFn =
         reinterpret_cast<glGetTransformFeedbackVaryingProc>(
             GetGLProcAddress("glGetTransformFeedbackVarying"));
+  } else if (ext.b_GL_EXT_transform_feedback) {
+    fn.glGetTransformFeedbackVaryingFn =
+        reinterpret_cast<glGetTransformFeedbackVaryingProc>(
+            GetGLProcAddress("glGetTransformFeedbackVaryingEXT"));
   }
 
   debug_fn.glGetTranslatedShaderSourceANGLEFn = 0;
   if (ext.b_GL_ANGLE_translated_shader_source) {
     fn.glGetTranslatedShaderSourceANGLEFn =
         reinterpret_cast<glGetTranslatedShaderSourceANGLEProc>(
             GetGLProcAddress("glGetTranslatedShaderSourceANGLE"));
   }
 
   debug_fn.glGetUniformBlockIndexFn = 0;
@@ skipping 77 matching lines @@
   debug_fn.glIsRenderbufferEXTFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->is_es) {
     fn.glIsRenderbufferEXTFn = reinterpret_cast<glIsRenderbufferEXTProc>(
         GetGLProcAddress("glIsRenderbuffer"));
   } else if (ext.b_GL_EXT_framebuffer_object) {
     fn.glIsRenderbufferEXTFn = reinterpret_cast<glIsRenderbufferEXTProc>(
         GetGLProcAddress("glIsRenderbufferEXT"));
   }
 
   debug_fn.glIsSamplerFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glIsSamplerFn =
         reinterpret_cast<glIsSamplerProc>(GetGLProcAddress("glIsSampler"));
   }
 
   debug_fn.glIsSyncFn = 0;
   if (ver->IsAtLeastGL(3u, 2u) || ver->IsAtLeastGLES(3u, 0u) ||
       ext.b_GL_ARB_sync) {
     fn.glIsSyncFn =
         reinterpret_cast<glIsSyncProc>(GetGLProcAddress("glIsSync"));
   }
 
   debug_fn.glIsTransformFeedbackFn = 0;
-  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u)) {
+  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u) ||
+      ext.b_GL_ARB_transform_feedback2) {
     fn.glIsTransformFeedbackFn = reinterpret_cast<glIsTransformFeedbackProc>(
         GetGLProcAddress("glIsTransformFeedback"));
   }
 
   debug_fn.glIsVertexArrayOESFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u) ||
       ext.b_GL_ARB_vertex_array_object) {
     fn.glIsVertexArrayOESFn = reinterpret_cast<glIsVertexArrayOESProc>(
         GetGLProcAddress("glIsVertexArray"));
   } else if (ext.b_GL_OES_vertex_array_object) {
@@ skipping 64 matching lines @@
         GetGLProcAddress("glPathParameteriNV"));
   }
 
   debug_fn.glPathStencilFuncNVFn = 0;
   if (ext.b_GL_NV_path_rendering) {
     fn.glPathStencilFuncNVFn = reinterpret_cast<glPathStencilFuncNVProc>(
         GetGLProcAddress("glPathStencilFuncNV"));
   }
 
   debug_fn.glPauseTransformFeedbackFn = 0;
-  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u)) {
+  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u) ||
+      ext.b_GL_ARB_transform_feedback2) {
     fn.glPauseTransformFeedbackFn =
         reinterpret_cast<glPauseTransformFeedbackProc>(
             GetGLProcAddress("glPauseTransformFeedback"));
   }
 
   debug_fn.glPointParameteriFn = 0;
   if (!ver->is_es) {
     fn.glPointParameteriFn = reinterpret_cast<glPointParameteriProc>(
         GetGLProcAddress("glPointParameteri"));
   }
@@ skipping 97 matching lines @@
   }
 
   debug_fn.glRenderbufferStorageMultisampleIMGFn = 0;
   if (ext.b_GL_IMG_multisampled_render_to_texture) {
     fn.glRenderbufferStorageMultisampleIMGFn =
         reinterpret_cast<glRenderbufferStorageMultisampleIMGProc>(
             GetGLProcAddress("glRenderbufferStorageMultisampleIMG"));
   }
 
   debug_fn.glResumeTransformFeedbackFn = 0;
-  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u)) {
+  if (ver->IsAtLeastGLES(3u, 0u) || ver->IsAtLeastGL(4u, 0u) ||
+      ext.b_GL_ARB_transform_feedback2) {
     fn.glResumeTransformFeedbackFn =
         reinterpret_cast<glResumeTransformFeedbackProc>(
             GetGLProcAddress("glResumeTransformFeedback"));
   }
 
   debug_fn.glSamplerParameterfFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glSamplerParameterfFn = reinterpret_cast<glSamplerParameterfProc>(
         GetGLProcAddress("glSamplerParameterf"));
   }
 
   debug_fn.glSamplerParameterfvFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glSamplerParameterfvFn = reinterpret_cast<glSamplerParameterfvProc>(
         GetGLProcAddress("glSamplerParameterfv"));
   }
 
   debug_fn.glSamplerParameteriFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glSamplerParameteriFn = reinterpret_cast<glSamplerParameteriProc>(
         GetGLProcAddress("glSamplerParameteri"));
   }
 
   debug_fn.glSamplerParameterivFn = 0;
-  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u)) {
+  if (ver->IsAtLeastGL(3u, 3u) || ver->IsAtLeastGLES(3u, 0u) ||
+      ext.b_GL_ARB_sampler_objects) {
     fn.glSamplerParameterivFn = reinterpret_cast<glSamplerParameterivProc>(
         GetGLProcAddress("glSamplerParameteriv"));
   }
 
   debug_fn.glSetFenceAPPLEFn = 0;
   if (ext.b_GL_APPLE_fence) {
     fn.glSetFenceAPPLEFn = reinterpret_cast<glSetFenceAPPLEProc>(
         GetGLProcAddress("glSetFenceAPPLE"));
   }
 
@@ skipping 102 matching lines @@
   if (!ver->is_es || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glTexSubImage3DFn = reinterpret_cast<glTexSubImage3DProc>(
         GetGLProcAddress("glTexSubImage3D"));
   }
 
   debug_fn.glTransformFeedbackVaryingsFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glTransformFeedbackVaryingsFn =
         reinterpret_cast<glTransformFeedbackVaryingsProc>(
             GetGLProcAddress("glTransformFeedbackVaryings"));
+  } else if (ext.b_GL_EXT_transform_feedback) {
+    fn.glTransformFeedbackVaryingsFn =
+        reinterpret_cast<glTransformFeedbackVaryingsProc>(
+            GetGLProcAddress("glTransformFeedbackVaryingsEXT"));
   }
 
   debug_fn.glUniform1uiFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
     fn.glUniform1uiFn =
         reinterpret_cast<glUniform1uiProc>(GetGLProcAddress("glUniform1ui"));
   }
 
   debug_fn.glUniform1uivFn = 0;
   if (ver->IsAtLeastGL(3u, 0u) || ver->IsAtLeastGLES(3u, 0u)) {
@@ skipping 11638 matching lines @@
 
 GLenum NoContextGLApi::glWaitSyncFn(GLsync sync,
                                     GLbitfield flags,
                                     GLuint64 timeout) {
   NOTREACHED() << "Trying to call glWaitSync() without current GL context";
   LOG(ERROR) << "Trying to call glWaitSync() without current GL context";
   return static_cast<GLenum>(0);
 }
 
 }  // namespace gl