Make CopyTexImage2D and CopyTexSubImage2D fail if...

gpu/command_buffer/common/gles2_cmd_utils.cc

 // Copyright (c) 2009 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 here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 #include <GLES2/gles2_command_buffer.h>
@@ skipping 481 matching lines @@
     GL_TEXTURE_CUBE_MAP_POSITIVE_X,
     GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
     GL_TEXTURE_CUBE_MAP_POSITIVE_Y,
     GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
     GL_TEXTURE_CUBE_MAP_POSITIVE_Z,
     GL_TEXTURE_CUBE_MAP_NEGATIVE_Z,
   };
   return faces[index];
 }
 
+uint32 GLES2Util::GetChannelsForFormat(int format) {
+  switch (format) {
+    case GL_ALPHA:
+      return 0x0008;
+    case GL_LUMINANCE:
+      return 0x0007;
+    case GL_LUMINANCE_ALPHA:
+      return 0x000F;
+    case GL_RGB:
+    case GL_RGB565:
+      return 0x0007;
+    case GL_RGBA:
+    case GL_RGBA4:
+    case GL_RGB5_A1:
+      return 0x000F;
+    default:
+      return 0x0000;
+  }
+}
+
 }  // namespace gles2
 }  // namespace gpu