gpu: introduce glCopySubTextureCHROMIUM

gpu/GLES2/gl2extchromium.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.
 
 // This file contains Chromium-specific GLES2 extensions declarations.
 
 #ifndef GPU_GLES2_GL2EXTCHROMIUM_H_
 #define GPU_GLES2_GL2EXTCHROMIUM_H_
 
 #include <GLES2/gl2.h>
@@ skipping 379 matching lines @@
 #define GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM 0x9242
 #endif
 
 #ifndef GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM
 #define GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM 0x9241
 #endif
 #ifdef GL_GLEXT_PROTOTYPES
 GL_APICALL void GL_APIENTRY glCopyTextureCHROMIUM(
     GLenum target, GLenum source_id, GLenum dest_id, GLint level,
     GLint internalformat, GLenum dest_type);
+
+GL_APICALL void GL_APIENTRY glCopySubTextureCHROMIUM(GLenum target,
+                                                     GLenum source_id,
+                                                     GLenum dest_id,
+                                                     GLint level,
+                                                     GLint xoffset,
+                                                     GLint yoffset);
 #endif
 typedef void (GL_APIENTRYP PFNGLCOPYTEXTURECHROMIUMPROC) (
     GLenum target, GLenum source_id, GLenum dest_id, GLint level,
     GLint internalformat, GLenum dest_type);
+
+typedef void(GL_APIENTRYP PFNGLCOPYSUBTEXTURECHROMIUMPROC)(GLenum target,
+                                                           GLenum source_id,
+                                                           GLenum dest_id,
+                                                           GLint level,
+                                                           GLint xoffset,
+                                                           GLint yoffset);
 #endif  /* GL_CHROMIUM_copy_texture */
 
 /* GL_CHROMIUM_lose_context */
 #ifndef GL_CHROMIUM_lose_context
 #define GL_CHROMIUM_lose_context 1
 #ifdef GL_GLEXT_PROTOTYPES
 GL_APICALL void GL_APIENTRY glLoseContextCHROMIUM(GLenum current, GLenum other);
 #endif
 typedef void (GL_APIENTRYP PFNGLLOSECONTEXTCHROMIUMPROC) (
     GLenum current, GLenum other);
@@ skipping 349 matching lines @@
 typedef void(GL_APIENTRYP PFNGLMATRIXLOADIDENTITYCHROMIUMPROC)(
     GLenum matrixMode);
 
 #endif /* GL_CHROMIUM_path_rendering */
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // GPU_GLES2_GL2EXTCHROMIUM_H_