cc/software_output_device.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_SOFTWARE_OUTPUT_DEVICE_H_
   6 #define CC_SOFTWARE_OUTPUT_DEVICE_H_
   7
   8 #include "third_party/WebKit/Source/Platform/chromium/public/WebImage.h"
   9 #include "ui/gfx/size.h"
  10
  11 namespace cc {
  12
  13 // This is a "tear-off" class providing software drawing support to
  14 // OutputSurface, such as to a platform-provided window framebuffer.
  15 class SoftwareOutputDevice {
  16  public:
  17   virtual ~SoftwareOutputDevice() {}
  18
  19   // Lock the framebuffer and return a pointer to a WebImage referring to its
  20   // pixels. Set forWrite if you intend to change the pixels. Readback
  21   // is supported whether or not forWrite is set.
  22   // TODO(danakj): Switch this from WebImage to a Skia type.
  23   virtual WebKit::WebImage* Lock(bool forWrite) = 0;
  24   virtual void Unlock() = 0;
  25
  26   virtual void DidChangeViewportSize(gfx::Size) = 0;
  27 };
  28
  29 }  // namespace cc
  30
  31 #endif // CC_SOFTWARE_OUTPUT_DEVICE_H_