ppapi/proxy/browser_font_resource_trusted.h

   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 PPAPI_PROXY_BROWSER_FONT_TRUSTED_RESOURCE_H_
   6 #define PPAPI_PROXY_BROWSER_FONT_TRUSTED_RESOURCE_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/proxy/ppapi_proxy_export.h"
  18 #include "ppapi/shared_impl/ppapi_preferences.h"
  19 #include "ppapi/thunk/ppb_browser_font_trusted_api.h"
  20
  21 class SkCanvas;
  22
  23 namespace WebKit {
  24 class WebFont;
  25 }
  26
  27 namespace ppapi {
  28 namespace proxy {
  29
  30 class PPAPI_PROXY_EXPORT BrowserFontResource_Trusted
  31     : public PluginResource,
  32       public thunk::PPB_BrowserFont_Trusted_API {
  33  public:
  34   BrowserFontResource_Trusted(Connection connection,
  35                               PP_Instance instance,
  36                               const PP_BrowserFont_Trusted_Description& desc,
  37                               const Preferences& prefs);
  38
  39   virtual ~BrowserFontResource_Trusted();
  40
  41   // Validates the parameters in thee description. Can be called on any thread.
  42   static bool IsPPFontDescriptionValid(
  43       const PP_BrowserFont_Trusted_Description& desc);
  44
  45   // Resource override.
  46   virtual ::ppapi::thunk::PPB_BrowserFont_Trusted_API*
  47       AsPPB_BrowserFont_Trusted_API() OVERRIDE;
  48
  49   // PPB_BrowserFont_Trusted_API implementation.
  50   virtual PP_Bool Describe(PP_BrowserFont_Trusted_Description* description,
  51                            PP_BrowserFont_Trusted_Metrics* metrics) OVERRIDE;
  52   virtual PP_Bool DrawTextAt(PP_Resource image_data,
  53                              const PP_BrowserFont_Trusted_TextRun* text,
  54                              const PP_Point* position,
  55                              uint32_t color,
  56                              const PP_Rect* clip,
  57                              PP_Bool image_data_is_opaque) OVERRIDE;
  58   virtual int32_t MeasureText(
  59       const PP_BrowserFont_Trusted_TextRun* text) OVERRIDE;
  60   virtual uint32_t CharacterOffsetForPixel(
  61       const PP_BrowserFont_Trusted_TextRun* text,
  62       int32_t pixel_position) OVERRIDE;
  63   virtual int32_t PixelOffsetForCharacter(
  64       const PP_BrowserFont_Trusted_TextRun* text,
  65       uint32_t char_offset) OVERRIDE;
  66
  67  private:
  68   // Internal version of DrawTextAt that takes a mapped PlatformCanvas.
  69   void DrawTextToCanvas(SkCanvas* destination,
  70                         const PP_BrowserFont_Trusted_TextRun& text,
  71                         const PP_Point* position,
  72                         uint32_t color,
  73                         const PP_Rect* clip,
  74                         PP_Bool image_data_is_opaque);
  75
  76  private:
  77   scoped_ptr<WebKit::WebFont> font_;
  78
  79   DISALLOW_COPY_AND_ASSIGN(BrowserFontResource_Trusted);
  80 };
  81
  82 }  // namespace proxy
  83 }  // namespace ppapi
  84
  85 #endif  // PPAPI_PROXY_BROWSER_FONT_TRUSTED_RESOURCE_H_