WIP RasterCanvasLayerAllocator experiment 2

skia/ext/bitmap_platform_device_skia.h

-// Copyright 2013 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 SKIA_EXT_BITMAP_PLATFORM_DEVICE_SKIA_H_
-#define SKIA_EXT_BITMAP_PLATFORM_DEVICE_SKIA_H_
-
-#include <stdint.h>
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "skia/ext/platform_device.h"
-
-namespace skia {
-
-class ScopedPlatformPaint;
-
-// -----------------------------------------------------------------------------
-// For now we just use SkBitmap for SkBitmapDevice
-//
-// This is all quite ok for test_shell. In the future we will want to use
-// shared memory between the renderer and the main process at least. In this
-// case we'll probably create the buffer from a precreated region of memory.
-// -----------------------------------------------------------------------------
-class BitmapPlatformDevice : public SkBitmapDevice, public PlatformDevice {
- public:
-  // Construct a BitmapPlatformDevice. |is_opaque| should be set if the caller
-  // knows the bitmap will be completely opaque and allows some optimizations.
-  // The bitmap is not initialized.
-  static BitmapPlatformDevice* Create(int width, int height, bool is_opaque);
-
-  // This doesn't take ownership of |data|. If |data| is null, the bitmap
-  // is not initialized to 0.
-  static BitmapPlatformDevice* Create(int width, int height, bool is_opaque,
-                                      uint8_t* data);
-
-  // Create a BitmapPlatformDevice from an already constructed bitmap;
-  // you should probably be using Create(). This may become private later if
-  // we ever have to share state between some native drawing UI and Skia, like
-  // the Windows and Mac versions of this class do.
-  explicit BitmapPlatformDevice(const SkBitmap& other);
-  ~BitmapPlatformDevice() override;
-
- protected:
-  SkBaseDevice* onCreateDevice(const CreateInfo&, const SkPaint*) override;
-
- private:
-  PlatformSurface BeginPlatformPaint(const SkMatrix& transform,
-                                     const SkIRect& clip_bounds) override;
-
-  DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDevice);
-
-  friend class ScopedPlatformPaint;
-};
-
-}  // namespace skia
-
-#endif  // SKIA_EXT_BITMAP_PLATFORM_DEVICE_SKIA_H_