ui/ozone/platform/drm/gpu/scanout_buffer.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_DRM_GPU_SCANOUT_BUFFER_H_
   6 #define UI_OZONE_PLATFORM_DRM_GPU_SCANOUT_BUFFER_H_
   7
   8 #include <stdint.h>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "ui/gfx/geometry/size.h"
  12
  13 namespace ui {
  14
  15 class DrmDevice;
  16
  17 // Abstraction for a DRM buffer that can be scanned-out of.
  18 class ScanoutBuffer : public base::RefCountedThreadSafe<ScanoutBuffer> {
  19  public:
  20   // ID allocated by the KMS API when the buffer is registered (via the handle).
  21   virtual uint32_t GetFramebufferId() const = 0;
  22
  23   // Handle for the buffer. This is received when allocating the buffer.
  24   virtual uint32_t GetHandle() const = 0;
  25
  26   // Size of the buffer.
  27   virtual gfx::Size GetSize() const = 0;
  28
  29   // Format of the buffer.
  30   virtual uint32_t GetFormat() const = 0;
  31
  32  protected:
  33   virtual ~ScanoutBuffer() {}
  34
  35   friend class base::RefCountedThreadSafe<ScanoutBuffer>;
  36 };
  37
  38 class ScanoutBufferGenerator {
  39  public:
  40   virtual ~ScanoutBufferGenerator() {}
  41
  42   virtual scoped_refptr<ScanoutBuffer> Create(
  43       const scoped_refptr<DrmDevice>& drm,
  44       const gfx::Size& size) = 0;
  45 };
  46
  47 }  // namespace ui
  48
  49 #endif  // UI_OZONE_PLATFORM_DRM_GPU_SCANOUT_BUFFER_H_