cc: Adding ETC1 support to UIResourceBitmap and ResourceProvider

cc/resources/resource.cc

Index: cc/resources/resource.cc
diff --git a/cc/resources/resource.cc b/cc/resources/resource.cc
index 9bbcd4f498b96628507ce6da25eed352b932f009..43ab60661ca2f09a2704760b8364631c068afe0b 100644
--- a/cc/resources/resource.cc
+++ b/cc/resources/resource.cc
@@ -13,5 +13,11 @@ size_t Resource::bytes() const {
   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