command_buffer: Implement EXT_blend_func_extended

ui/gl/gl_bindings.h

 // 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.
 
 #ifndef UI_GL_GL_BINDINGS_H_
 #define UI_GL_GL_BINDINGS_H_
 
 #include <string>
 
 // Includes the platform independent and platform dependent GL headers.
@@ skipping 313 matching lines @@
 
 // This is from NV_path_rendering, but the Mesa GL header is not up-to-date with
 // the most recent
 // version of the extension. This definition could be removed once glext.h
 // r27498 or later is
 // imported.
 #ifndef GL_FRAGMENT_INPUT_NV
 #define GL_FRAGMENT_INPUT_NV 0x936D
 #endif
 
+#ifndef GL_EXT_blend_func_extended
+#define GL_EXT_blend_func_extended 1
+#define GL_SRC_ALPHA_SATURATE_EXT 0x0308
+#define GL_SRC1_ALPHA_EXT 0x8589  // OpenGL 1.5 token value
+#define GL_SRC1_COLOR_EXT 0x88F9
+#define GL_ONE_MINUS_SRC1_COLOR_EXT 0x88FA
+#define GL_ONE_MINUS_SRC1_ALPHA_EXT 0x88FB
+#define GL_MAX_DUAL_SOURCE_DRAW_BUFFERS_EXT 0x88FC
+#endif /* GL_EXT_blend_func_extended */
+
 #define GL_GLEXT_PROTOTYPES 1
 
 #if defined(OS_WIN)
 #define GL_BINDING_CALL WINAPI
 #else
 #define GL_BINDING_CALL
 #endif
 
 #define GL_SERVICE_LOG(args) DLOG(INFO) << args;
 #if defined(NDEBUG)
@@ skipping 138 matching lines @@
 #elif defined(OS_ANDROID)
 
 GL_EXPORT extern EGLApi* g_current_egl_context;
 GL_EXPORT extern DriverEGL g_driver_egl;
 
 #endif
 
 }  // namespace gfx
 
 #endif  // UI_GL_GL_BINDINGS_H_