ui/ozone/platform/drm/gpu/drm_console_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_DRM_CONSOLE_BUFFER_H_
   6 #define UI_OZONE_PLATFORM_DRM_GPU_DRM_CONSOLE_BUFFER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "skia/ext/refptr.h"
  11 #include "third_party/skia/include/core/SkSurface.h"
  12
  13 class SkCanvas;
  14
  15 namespace ui {
  16
  17 class DrmDevice;
  18
  19 // Wrapper for the console buffer. This is the buffer that is allocated by
  20 // default by the system and is used when no application is controlling the
  21 // CRTC. Keeps track of the native properties of the buffer and wraps the pixel
  22 // memory into a SkSurface which can be used to draw into using Skia.
  23 class DrmConsoleBuffer {
  24  public:
  25   DrmConsoleBuffer(const scoped_refptr<DrmDevice>& drm, uint32_t framebuffer);
  26   ~DrmConsoleBuffer();
  27
  28   SkCanvas* canvas() { return surface_->getCanvas(); }
  29   skia::RefPtr<SkImage> image() {
  30     return skia::AdoptRef(surface_->newImageSnapshot());
  31   }
  32
  33   // Memory map the backing pixels and wrap them in |surface_|.
  34   bool Initialize();
  35
  36  protected:
  37   scoped_refptr<DrmDevice> drm_;
  38
  39   // Wrapper around the native pixel memory.
  40   skia::RefPtr<SkSurface> surface_;
  41
  42   // Length of a row of pixels.
  43   uint32_t stride_;
  44
  45   // Buffer handle used by the DRM allocator.
  46   uint32_t handle_;
  47
  48   // Buffer ID used by the DRM modesettings API.
  49   uint32_t framebuffer_;
  50
  51   // Memory map base address.
  52   void* mmap_base_;
  53
  54   // Memory map size.
  55   size_t mmap_size_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(DrmConsoleBuffer);
  58 };
  59
  60 }  // namespace ui
  61
  62 #endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_CONSOLE_BUFFER_H_