ui/ozone/platform/dri/dri_surface.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 UI_OZONE_PLATFORM_DRI_DRI_SURFACE_H_
   6 #define UI_OZONE_PLATFORM_DRI_DRI_SURFACE_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ui/gfx/geometry/size.h"
  11 #include "ui/gfx/skia_util.h"
  12 #include "ui/ozone/ozone_export.h"
  13 #include "ui/ozone/platform/dri/scanout_surface.h"
  14
  15 class SkCanvas;
  16
  17 namespace ui {
  18
  19 class DriBuffer;
  20 class DriWrapper;
  21
  22 // An implementation of ScanoutSurface which uses dumb buffers (used for
  23 // software rendering).
  24 class OZONE_EXPORT DriSurface : public ScanoutSurface {
  25  public:
  26   DriSurface(DriWrapper* dri, const gfx::Size& size);
  27   virtual ~DriSurface();
  28
  29   // Get a Skia canvas for a backbuffer.
  30   SkCanvas* GetDrawableForWidget();
  31
  32   // ScanoutSurface:
  33   virtual bool Initialize() OVERRIDE;
  34   virtual uint32_t GetFramebufferId() const OVERRIDE;
  35   virtual uint32_t GetHandle() const OVERRIDE;
  36   virtual void SwapBuffers() OVERRIDE;
  37   virtual gfx::Size Size() const OVERRIDE;
  38
  39  private:
  40   DriBuffer* frontbuffer() const { return bitmaps_[front_buffer_].get(); }
  41   DriBuffer* backbuffer() const { return bitmaps_[front_buffer_ ^ 1].get(); }
  42
  43   // Used to create the backing buffers.
  44   virtual DriBuffer* CreateBuffer();
  45
  46   // Stores the connection to the graphics card. Pointer not owned by this
  47   // class.
  48   DriWrapper* dri_;
  49
  50   // The actual buffers used for painting.
  51   scoped_ptr<DriBuffer> bitmaps_[2];
  52
  53   // Keeps track of which bitmap is |buffers_| is the frontbuffer.
  54   int front_buffer_;
  55
  56   // Surface size.
  57   gfx::Size size_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(DriSurface);
  60 };
  61
  62 }  // namespace ui
  63
  64 #endif  // UI_OZONE_PLATFORM_DRI_DRI_SURFACE_H_