gfx/thebes/gfxCoreTextShaper.h

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef GFX_CORETEXTSHAPER_H
   7 #define GFX_CORETEXTSHAPER_H
   8
   9 #include "gfxTypes.h"
  10 #include "gfxFont.h"
  11 #include "gfxFontUtils.h"
  12 #include "gfxPlatform.h"
  13 #include "gfxMacPlatformFontList.h"
  14
  15 #include <Carbon/Carbon.h>
  16
  17 class gfxMacFont;
  18
  19 class gfxCoreTextShaper : public gfxFontShaper {
  20 public:
  21     gfxCoreTextShaper(gfxMacFont *aFont);
  22
  23     virtual ~gfxCoreTextShaper();
  24
  25     virtual bool ShapeText(gfxContext      *aContext,
  26                            const PRUnichar *aText,
  27                            uint32_t         aOffset,
  28                            uint32_t         aLength,
  29                            int32_t          aScript,
  30                            gfxShapedText   *aShapedText);
  31
  32     // clean up static objects that may have been cached
  33     static void Shutdown();
  34
  35 protected:
  36     CTFontRef mCTFont;
  37     CFDictionaryRef mAttributesDict;
  38
  39     nsresult SetGlyphsFromRun(gfxShapedText *aShapedText,
  40                               uint32_t       aOffset,
  41                               uint32_t       aLength,
  42                               CTRunRef       aCTRun,
  43                               int32_t        aStringOffset);
  44
  45     CTFontRef CreateCTFontWithDisabledLigatures(CGFloat aSize);
  46
  47     static void CreateDefaultFeaturesDescriptor();
  48
  49     static CTFontDescriptorRef GetDefaultFeaturesDescriptor() {
  50         if (sDefaultFeaturesDescriptor == NULL) {
  51             CreateDefaultFeaturesDescriptor();
  52         }
  53         return sDefaultFeaturesDescriptor;
  54     }
  55
  56     // cached font descriptor, created the first time it's needed
  57     static CTFontDescriptorRef    sDefaultFeaturesDescriptor;
  58
  59     // cached descriptor for adding disable-ligatures setting to a font
  60     static CTFontDescriptorRef    sDisableLigaturesDescriptor;
  61 };
  62
  63 #endif /* GFX_CORETEXTSHAPER_H */