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#ifndef CONTENT_CHILD_BROWSER_FONT_RESOURCE_TRUSTED_H_
6#define CONTENT_CHILD_BROWSER_FONT_RESOURCE_TRUSTED_H_
7
8#include <string>
9
10#include "base/basictypes.h"
11#include "base/memory/scoped_ptr.h"
12#include "ppapi/c/pp_bool.h"
13#include "ppapi/c/pp_instance.h"
14#include "ppapi/c/pp_resource.h"
15#include "ppapi/c/pp_stdint.h"
16#include "ppapi/proxy/plugin_resource.h"
17#include "ppapi/shared_impl/ppapi_preferences.h"
18#include "ppapi/thunk/ppb_browser_font_trusted_api.h"
19
20class SkCanvas;
21
22namespace blink {
23class WebFont;
24}
25
26namespace content {
27
28class BrowserFontResource_Trusted
29    : public ppapi::proxy::PluginResource,
30      public ppapi::thunk::PPB_BrowserFont_Trusted_API {
31 public:
32  BrowserFontResource_Trusted(ppapi::proxy::Connection connection,
33                              PP_Instance instance,
34                              const PP_BrowserFont_Trusted_Description& desc,
35                              const ppapi::Preferences& prefs);
36
37  // Validates the parameters in thee description. Can be called on any thread.
38  static bool IsPPFontDescriptionValid(
39      const PP_BrowserFont_Trusted_Description& desc);
40
41  // Resource override.
42  virtual ::ppapi::thunk::PPB_BrowserFont_Trusted_API*
43      AsPPB_BrowserFont_Trusted_API() OVERRIDE;
44
45  // PPB_BrowserFont_Trusted_API implementation.
46  virtual PP_Bool Describe(PP_BrowserFont_Trusted_Description* description,
47                           PP_BrowserFont_Trusted_Metrics* metrics) OVERRIDE;
48  virtual PP_Bool DrawTextAt(PP_Resource image_data,
49                             const PP_BrowserFont_Trusted_TextRun* text,
50                             const PP_Point* position,
51                             uint32_t color,
52                             const PP_Rect* clip,
53                             PP_Bool image_data_is_opaque) OVERRIDE;
54  virtual int32_t MeasureText(
55      const PP_BrowserFont_Trusted_TextRun* text) OVERRIDE;
56  virtual uint32_t CharacterOffsetForPixel(
57      const PP_BrowserFont_Trusted_TextRun* text,
58      int32_t pixel_position) OVERRIDE;
59  virtual int32_t PixelOffsetForCharacter(
60      const PP_BrowserFont_Trusted_TextRun* text,
61      uint32_t char_offset) OVERRIDE;
62
63 private:
64  virtual ~BrowserFontResource_Trusted();
65
66  // Internal version of DrawTextAt that takes a mapped PlatformCanvas.
67  void DrawTextToCanvas(SkCanvas* destination,
68                        const PP_BrowserFont_Trusted_TextRun& text,
69                        const PP_Point* position,
70                        uint32_t color,
71                        const PP_Rect* clip,
72                        PP_Bool image_data_is_opaque);
73
74 private:
75  scoped_ptr<blink::WebFont> font_;
76
77  DISALLOW_COPY_AND_ASSIGN(BrowserFontResource_Trusted);
78};
79
80}  // namespace content
81
82#endif  // CONTENT_CHILD_BROWSER_FONT_RESOURCE_TRUSTED_H_
83