Ozone integration.

ui/ozone/platform/drm/gpu/drm_console_buffer.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_OZONE_PLATFORM_DRM_GPU_DRM_CONSOLE_BUFFER_H_
+#define UI_OZONE_PLATFORM_DRM_GPU_DRM_CONSOLE_BUFFER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "skia/ext/refptr.h"
+#include "third_party/skia/include/core/SkSurface.h"
+
+class SkCanvas;
+
+namespace ui {
+
+class DrmDevice;
+
+// Wrapper for the console buffer. This is the buffer that is allocated by
+// default by the system and is used when no application is controlling the
+// CRTC. Keeps track of the native properties of the buffer and wraps the pixel
+// memory into a SkSurface which can be used to draw into using Skia.
+class DrmConsoleBuffer {
+ public:
+  DrmConsoleBuffer(const scoped_refptr<DrmDevice>& drm, uint32_t framebuffer);
+  ~DrmConsoleBuffer();
+
+  SkCanvas* canvas() { return surface_->getCanvas(); }
+  skia::RefPtr<SkImage> image() {
+    return skia::AdoptRef(surface_->newImageSnapshot());
+  }
+
+  // Memory map the backing pixels and wrap them in |surface_|.
+  bool Initialize();
+
+ protected:
+  scoped_refptr<DrmDevice> drm_;
+
+  // Wrapper around the native pixel memory.
+  skia::RefPtr<SkSurface> surface_;
+
+  // Length of a row of pixels.
+  uint32_t stride_ = 0;
+
+  // Buffer handle used by the DRM allocator.
+  uint32_t handle_ = 0;
+
+  // Buffer ID used by the DRM modesettings API.
+  uint32_t framebuffer_ = 0;
+
+  // Memory map base address.
+  void* mmap_base_ = nullptr;
+
+  // Memory map size.
+  size_t mmap_size_ = 0;
+
+  DISALLOW_COPY_AND_ASSIGN(DrmConsoleBuffer);
+};
+
+}  // namespace ui
+
+#endif  // UI_OZONE_PLATFORM_DRM_GPU_DRM_CONSOLE_BUFFER_H_