cc: Adding ETC1 support to UIResourceBitmap and ResourceProvider

cc/resources/resource.cc

 // Copyright 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.
 
 #include "cc/resources/resource.h"
 
 namespace cc {
 
 size_t Resource::bytes() const {
   if (size_.IsEmpty())
     return 0;
 
   return MemorySizeBytes(size_, format_);
 }
 
+size_t Resource::ETC1SizeInBytes(gfx::Size size) {
+  size_t block_size = 64;

[kaanb, 2013/10/18 16:54:49]

const size_t kBlockSize = 64;

as this is a compile time constant

[powei, 2013/10/23 05:36:15]

Done.

+  size_t compressed_width = size.width() / 4 + (size.width() % 4 ? 1 : 0);

[aelias_OOO_until_Jul13, 2013/10/18 01:59:24]

Could we just DCHECK that the resource size is divisible by 4 instead and avoid
this method?

[powei, 2013/10/23 05:36:15]

Done.  

+  size_t compressed_height = size.height() / 4 + (size.height() % 4 ? 1 : 0);
+  return block_size * compressed_width * compressed_height;
+}
 
 }  // namespace cc