gfx/thebes/gfxMacFont.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_MACFONT_H
   7 #define GFX_MACFONT_H
   8
   9 #include "mozilla/MemoryReporting.h"
  10 #include "gfxFont.h"
  11 #include "cairo.h"
  12 #include <ApplicationServices/ApplicationServices.h>
  13
  14 class MacOSFontEntry;
  15
  16 class gfxMacFont : public gfxFont
  17 {
  18 public:
  19     gfxMacFont(MacOSFontEntry *aFontEntry, const gfxFontStyle *aFontStyle,
  20                bool aNeedsBold);
  21
  22     virtual ~gfxMacFont();
  23
  24     CGFontRef GetCGFontRef() const { return mCGFont; }
  25
  26     /* overrides for the pure virtual methods in gfxFont */
  27     virtual const gfxFont::Metrics& GetMetrics() {
  28         return mMetrics;
  29     }
  30
  31     virtual uint32_t GetSpaceGlyph() {
  32         return mSpaceGlyph;
  33     }
  34
  35     virtual bool SetupCairoFont(gfxContext *aContext);
  36
  37     /* override Measure to add padding for antialiasing */
  38     virtual RunMetrics Measure(gfxTextRun *aTextRun,
  39                                uint32_t aStart, uint32_t aEnd,
  40                                BoundingBoxType aBoundingBoxType,
  41                                gfxContext *aContextForTightBoundingBox,
  42                                Spacing *aSpacing);
  43
  44     virtual mozilla::TemporaryRef<mozilla::gfx::ScaledFont> GetScaledFont(mozilla::gfx::DrawTarget *aTarget);
  45
  46     virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
  47                                         FontCacheSizes* aSizes) const;
  48     virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
  49                                         FontCacheSizes* aSizes) const;
  50
  51     virtual FontType GetType() const { return FONT_TYPE_MAC; }
  52
  53 protected:
  54     virtual void CreatePlatformShaper();
  55
  56     // override to prefer CoreText shaping with fonts that depend on AAT
  57     virtual bool ShapeText(gfxContext      *aContext,
  58                            const PRUnichar *aText,
  59                            uint32_t         aOffset,
  60                            uint32_t         aLength,
  61                            int32_t          aScript,
  62                            gfxShapedText   *aShapedText,
  63                            bool             aPreferPlatformShaping = false);
  64
  65     void InitMetrics();
  66     void InitMetricsFromPlatform();
  67
  68     // Get width and glyph ID for a character; uses aConvFactor
  69     // to convert font units as returned by CG to actual dimensions
  70     gfxFloat GetCharWidth(CFDataRef aCmap, PRUnichar aUniChar,
  71                           uint32_t *aGlyphID, gfxFloat aConvFactor);
  72
  73     // a weak reference to the CoreGraphics font: this is owned by the
  74     // MacOSFontEntry, it is not retained or released by gfxMacFont
  75     CGFontRef             mCGFont;
  76
  77     cairo_font_face_t    *mFontFace;
  78
  79     Metrics               mMetrics;
  80     uint32_t              mSpaceGlyph;
  81 };
  82
  83 #endif /* GFX_MACFONT_H */