content/browser/compositor/software_output_device_win.h

   1 // Copyright 2014 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 CONTENT_BROWSER_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_WIN_H_
   6 #define CONTENT_BROWSER_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_WIN_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "cc/output/software_output_device.h"
  12
  13 #include <windows.h>
  14
  15 namespace base {
  16 class SharedMemory;
  17 }
  18
  19 namespace ui {
  20 class Compositor;
  21 }
  22
  23 namespace content {
  24 class SoftwareOutputDeviceWin;
  25
  26 class OutputDeviceBacking {
  27  public:
  28   OutputDeviceBacking();
  29   ~OutputDeviceBacking();
  30
  31   void Resized();
  32   void RegisterOutputDevice(SoftwareOutputDeviceWin* device);
  33   void UnregisterOutputDevice(SoftwareOutputDeviceWin* device);
  34   base::SharedMemory* GetSharedMemory();
  35
  36  private:
  37   size_t GetMaxByteSize();
  38
  39   std::vector<SoftwareOutputDeviceWin*> devices_;
  40   scoped_ptr<base::SharedMemory> backing_;
  41   size_t created_byte_size_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(OutputDeviceBacking);
  44 };
  45
  46 class SoftwareOutputDeviceWin : public cc::SoftwareOutputDevice {
  47  public:
  48   SoftwareOutputDeviceWin(OutputDeviceBacking* backing,
  49                           ui::Compositor* compositor);
  50   ~SoftwareOutputDeviceWin() override;
  51
  52   void Resize(const gfx::Size& viewport_pixel_size,
  53               float scale_factor) override;
  54   SkCanvas* BeginPaint(const gfx::Rect& damage_rect) override;
  55   void EndPaint() override;
  56
  57   gfx::Size viewport_pixel_size() const { return viewport_pixel_size_; }
  58   void ReleaseContents();
  59
  60  private:
  61   HWND hwnd_;
  62   skia::RefPtr<SkCanvas> contents_;
  63   bool is_hwnd_composited_;
  64   OutputDeviceBacking* backing_;
  65   bool in_paint_;
  66
  67   DISALLOW_COPY_AND_ASSIGN(SoftwareOutputDeviceWin);
  68 };
  69
  70 }  // namespace content
  71
  72 #endif  // CONTENT_BROWSER_COMPOSITOR_SOFTWARE_OUTPUT_DEVICE_WIN_H_