cc: Adding ETC1 support to UIResourceBitmap and ResourceProvider

cc/resources/ui_resource_bitmap.h

 // Copyright 2013 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.
 
 #ifndef CC_RESOURCES_UI_RESOURCE_BITMAP_H_
 #define CC_RESOURCES_UI_RESOURCE_BITMAP_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkPixelRef.h"
 #include "third_party/skia/include/core/SkTypes.h"
 #include "ui/gfx/size.h"
 
 class SkBitmap;
 
 namespace cc {
 
 // A bitmap class that contains a ref-counted reference to a SkPixelRef* that
 // holds the content of the bitmap (cannot use SkBitmap because of ETC1).
 // Thread-safety (by ways of SkPixelRef) ensures that both main and impl threads
 // can hold references to the bitmap and that asynchronous uploads are allowed.
 class CC_EXPORT UIResourceBitmap {
  public:
   enum UIResourceFormat {
-    RGBA8
+    RGBA8,
+    ETC1
   };
   enum UIResourceWrapMode {
     CLAMP_TO_EDGE,
     REPEAT
   };
 
   gfx::Size GetSize() const { return size_; }
   UIResourceFormat GetFormat() const { return format_; }
   UIResourceWrapMode GetWrapMode() const { return wrap_mode_; }
+  void SetWrapMode(UIResourceWrapMode wrap_mode) { wrap_mode_ = wrap_mode; }
 
   // The constructor for the UIResourceBitmap.  User must ensure that |skbitmap|
   // is immutable.  The SkBitmap format should be in 32-bit RGBA.  Wrap mode is
   // unnecessary for most UI resources and is defaulted to CLAMP_TO_EDGE.
-  UIResourceBitmap(const SkBitmap& skbitmap,
-                   UIResourceWrapMode wrap_mode = CLAMP_TO_EDGE);
+  explicit UIResourceBitmap(const SkBitmap& skbitmap);
+
+  UIResourceBitmap(const skia::RefPtr<SkPixelRef>& pixel_ref,
+                   UIResourceFormat format,
+                   gfx::Size size);
 
   ~UIResourceBitmap();
 
  private:
   friend class AutoLockUIResourceBitmap;
   void Create(const skia::RefPtr<SkPixelRef>& pixel_ref,
               UIResourceFormat format,
-              UIResourceWrapMode wrap_mode,
               gfx::Size size);
 
   skia::RefPtr<SkPixelRef> pixel_ref_;
   UIResourceFormat format_;
   UIResourceWrapMode wrap_mode_;
   gfx::Size size_;
 };
 
 class CC_EXPORT AutoLockUIResourceBitmap {
  public:
   explicit AutoLockUIResourceBitmap(const UIResourceBitmap& bitmap);
   ~AutoLockUIResourceBitmap();
   const uint8_t* GetPixels() const;
 
  private:
   const UIResourceBitmap& bitmap_;
 };
 
 }  // namespace cc
 
 #endif  // CC_RESOURCES_UI_RESOURCE_BITMAP_H_