Make CopyTexImage2D and CopyTexSubImage2D fail if...

gpu/command_buffer/common/gles2_cmd_utils.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_
 #define GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_
 
@@ skipping 62 matching lines @@
   static uint32 GetGLDataTypeSizeForUniforms(int type);
 
   static size_t GetGLTypeSizeForTexturesAndBuffers(uint32 type);
 
   static uint32 GLErrorToErrorBit(uint32 gl_error);
 
   static uint32 GLErrorBitToGLError(uint32 error_bit);
 
   static uint32 IndexToGLFaceTarget(int index);
 
+  // Returns a bitmask for the channels the given format supports where
+  // 0x1 is red
+  // 0x2 is green
+  // 0x4 is blue
+  // 0x8 is alpha
+  static uint32 GetChannelsForFormat(int format);
+
   static bool IsNPOT(uint32 value) {
     return value > 0 && (value & (value - 1)) != 0;
   }
 
  private:
   int num_compressed_texture_formats_;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_