ui/ozone/platform/dri/dri_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_DRI_DRI_CONSOLE_BUFFER_H_
   6 #define UI_OZONE_PLATFORM_DRI_DRI_CONSOLE_BUFFER_H_
   7
   8 #include "base/macros.h"
   9 #include "skia/ext/refptr.h"
  10 #include "third_party/skia/include/core/SkSurface.h"
  11
  12 class SkCanvas;
  13
  14 namespace ui {
  15
  16 class DriWrapper;
  17
  18 // Wrapper for the console buffer. This is the buffer that is allocated by
  19 // default by the system and is used when no application is controlling the
  20 // CRTC. Keeps track of the native properties of the buffer and wraps the pixel
  21 // memory into a SkSurface which can be used to draw into using Skia.
  22 class DriConsoleBuffer {
  23  public:
  24   DriConsoleBuffer(DriWrapper* dri, uint32_t framebuffer);
  25   ~DriConsoleBuffer();
  26
  27   SkCanvas* canvas() { return surface_->getCanvas(); }
  28
  29   // Memory map the backing pixels and wrap them in |surface_|.
  30   bool Initialize();
  31
  32  protected:
  33   DriWrapper* dri_;  // Not owned.
  34
  35   // Wrapper around the native pixel memory.
  36   skia::RefPtr<SkSurface> surface_;
  37
  38   // Length of a row of pixels.
  39   uint32_t stride_;
  40
  41   // Buffer handle used by the DRM allocator.
  42   uint32_t handle_;
  43
  44   // Buffer ID used by the DRM modesettings API.
  45   uint32_t framebuffer_;
  46
  47   // Memory map base address.
  48   void* mmap_base_;
  49
  50   // Memory map size.
  51   size_t mmap_size_;
  52
  53   DISALLOW_COPY_AND_ASSIGN(DriConsoleBuffer);
  54 };
  55
  56 }  // namespace ui
  57
  58 #endif  // UI_OZONE_PLATFORM_DRI_DRI_CONSOLE_BUFFER_H_