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      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_BUFFER_H_
      6 #define UI_OZONE_PLATFORM_DRI_DRI_BUFFER_H_
      7 
      8 #include "base/macros.h"
      9 #include "skia/ext/refptr.h"
     10 #include "third_party/skia/include/core/SkSurface.h"
     11 #include "ui/ozone/platform/dri/scanout_buffer.h"
     12 
     13 namespace ui {
     14 
     15 class DriWrapper;
     16 
     17 // Wrapper for a DRM allocated buffer. Keeps track of the native properties of
     18 // the buffer and wraps the pixel memory into a SkSurface which can be used to
     19 // draw into using Skia.
     20 class DriBuffer : public ScanoutBuffer {
     21  public:
     22   DriBuffer(DriWrapper* dri);
     23 
     24   // Allocates the backing pixels and wraps them in |surface_|. |info| is used
     25   // to describe the buffer characteristics (size, color format).
     26   bool Initialize(const SkImageInfo& info);
     27 
     28   SkCanvas* GetCanvas() const;
     29 
     30   // ScanoutBuffer:
     31   virtual uint32_t GetFramebufferId() const OVERRIDE;
     32   virtual uint32_t GetHandle() const OVERRIDE;
     33   virtual gfx::Size GetSize() const OVERRIDE;
     34 
     35  protected:
     36   virtual ~DriBuffer();
     37 
     38   DriWrapper* dri_;  // Not owned.
     39 
     40   // Wrapper around the native pixel memory.
     41   skia::RefPtr<SkSurface> surface_;
     42 
     43   // Length of a row of pixels.
     44   uint32_t stride_;
     45 
     46   // Buffer handle used by the DRM allocator.
     47   uint32_t handle_;
     48 
     49   // Buffer ID used by the DRM modesettings API. This is set when the buffer is
     50   // registered with the CRTC.
     51   uint32_t framebuffer_;
     52 
     53   DISALLOW_COPY_AND_ASSIGN(DriBuffer);
     54 };
     55 
     56 class DriBufferGenerator : public ScanoutBufferGenerator {
     57  public:
     58   DriBufferGenerator(DriWrapper* dri);
     59   virtual ~DriBufferGenerator();
     60 
     61   // ScanoutBufferGenerator:
     62   virtual scoped_refptr<ScanoutBuffer> Create(const gfx::Size& size) OVERRIDE;
     63 
     64  private:
     65   DriWrapper* dri_;  // Not owned.
     66 
     67   DISALLOW_COPY_AND_ASSIGN(DriBufferGenerator);
     68 };
     69 
     70 }  // namespace ui
     71 
     72 #endif  // UI_OZONE_PLATFORM_DRI_DRI_BUFFER_H_
     73