cc/output/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_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_
   6 #define CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "cc/base/cc_export.h"
  10 #include "skia/ext/refptr.h"
  11 // TODO(robertphillips): change this to "class SkBaseDevice;"
  12 #include "third_party/skia/include/core/SkDevice.h"
  13 #include "ui/gfx/rect.h"
  14 #include "ui/gfx/size.h"
  15 #include "ui/gfx/vector2d.h"
  16
  17 class SkBitmap;
  18 class SkCanvas;
  19
  20 namespace cc {
  21
  22 class SoftwareFrameData;
  23
  24 // This is a "tear-off" class providing software drawing support to
  25 // OutputSurface, such as to a platform-provided window framebuffer.
  26 class CC_EXPORT SoftwareOutputDevice {
  27  public:
  28   SoftwareOutputDevice();
  29   virtual ~SoftwareOutputDevice();
  30
  31   // SoftwareOutputDevice implementation.
  32   virtual void Resize(gfx::Size size);
  33
  34   virtual SkCanvas* BeginPaint(gfx::Rect damage_rect);
  35   virtual void EndPaint(SoftwareFrameData* frame_data);
  36
  37   virtual void CopyToBitmap(gfx::Rect rect, SkBitmap* output);
  38   virtual void Scroll(gfx::Vector2d delta,
  39                       gfx::Rect clip_rect);
  40
  41   virtual void DiscardBackbuffer() {}
  42   virtual void EnsureBackbuffer() {}
  43
  44   // TODO(skaslev) Remove this after UberCompositor lands.
  45   virtual void ReclaimSoftwareFrame(unsigned id);
  46
  47  protected:
  48   gfx::Size viewport_size_;
  49   gfx::Rect damage_rect_;
  50   skia::RefPtr<SkBaseDevice> device_;
  51   skia::RefPtr<SkCanvas> canvas_;
  52
  53  private:
  54   DISALLOW_COPY_AND_ASSIGN(SoftwareOutputDevice);
  55 };
  56
  57 }  // namespace cc
  58
  59 #endif  // CC_OUTPUT_SOFTWARE_OUTPUT_DEVICE_H_