gpu: Extend CopyTextureCHROMIUM with support for copying part of source texture.

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 390 matching lines @@
 GL_APICALL void GL_APIENTRY glCopyTextureCHROMIUM(GLenum target,
                                                   GLenum source_id,
                                                   GLenum dest_id,
                                                   GLint internalformat,
                                                   GLenum dest_type);
 
 GL_APICALL void GL_APIENTRY glCopySubTextureCHROMIUM(GLenum target,
                                                      GLenum source_id,
                                                      GLenum dest_id,
                                                      GLint xoffset,
-                                                     GLint yoffset);
+                                                     GLint yoffset,
+                                                     GLint x,
+                                                     GLint y,
+                                                     GLsizei width,
+                                                     GLsizei height);
 #endif
 typedef void(GL_APIENTRYP PFNGLCOPYTEXTURECHROMIUMPROC)(GLenum target,
                                                         GLenum source_id,
                                                         GLenum dest_id,
                                                         GLint internalformat,
                                                         GLenum dest_type);
 
 typedef void(GL_APIENTRYP PFNGLCOPYSUBTEXTURECHROMIUMPROC)(GLenum target,
                                                            GLenum source_id,
                                                            GLenum dest_id,
                                                            GLint xoffset,
-                                                           GLint yoffset);
+                                                           GLint yoffset,
+                                                           GLint x,
+                                                           GLint y,
+                                                           GLsizei width,
+                                                           GLsizei height);
 #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_