ppb_graphics_2d_api.h revision 5821806d5e7f356e8fa4b058a389a808ea183019 
1// Copyright (c) 2012 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#include "base/memory/ref_counted.h"
6#include "ppapi/c/pp_bool.h"
7#include "ppapi/c/pp_completion_callback.h"
8#include "ppapi/c/pp_point.h"
9#include "ppapi/c/pp_rect.h"
10#include "ppapi/c/pp_resource.h"
11#include "ppapi/c/pp_size.h"
12
13namespace ppapi {
14
15class TrackedCallback;
16
17namespace thunk {
18
19class PPB_Graphics2D_API {
20 public:
21  virtual ~PPB_Graphics2D_API() {}
22
23  virtual PP_Bool Describe(PP_Size* size, PP_Bool* is_always_opaque) = 0;
24  virtual void PaintImageData(PP_Resource image_data,
25                              const PP_Point* top_left,
26                              const PP_Rect* src_rect) = 0;
27  virtual void Scroll(const PP_Rect* clip_rect,
28                      const PP_Point* amount) = 0;
29  virtual void ReplaceContents(PP_Resource image_data) = 0;
30  virtual bool SetScale(float scale) = 0;
31  virtual float GetScale() = 0;
32
33  // When |old_image_data| is non-null and the flush is executing a replace
34  // contents (which leaves the "old" ImageData unowned), the resource ID of
35  // the old image data will be placed into |*old_image_data| synchronously
36  // (not when the flush callback completes).
37  //
38  // When this happens, a reference to this resource will be transferred to the
39  // caller. If there is no replace contents operation, old_image_data will be
40  // ignored. If |*old_image_data| is null, then the old image data will be
41  // destroyed if there was one.
42  virtual int32_t Flush(scoped_refptr<TrackedCallback> callback,
43                        PP_Resource* old_image_data) = 0;
44};
45
46}  // namespace thunk
47}  // namespace ppapi
48