gfx/thebes/gfxFT2Fonts.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_FT2FONTS_H
   7 #define GFX_FT2FONTS_H
   8
   9 #include "mozilla/MemoryReporting.h"
  10 #include "cairo.h"
  11 #include "gfxTypes.h"
  12 #include "gfxFont.h"
  13 #include "gfxFT2FontBase.h"
  14 #include "gfxContext.h"
  15 #include "gfxFontUtils.h"
  16 #include "gfxUserFontSet.h"
  17
  18 class FT2FontEntry;
  19
  20 class gfxFT2Font : public gfxFT2FontBase {
  21 public: // new functions
  22     gfxFT2Font(cairo_scaled_font_t *aCairoFont,
  23                FT2FontEntry *aFontEntry,
  24                const gfxFontStyle *aFontStyle,
  25                bool aNeedsBold);
  26     virtual ~gfxFT2Font ();
  27
  28     FT2FontEntry *GetFontEntry();
  29
  30     static already_AddRefed<gfxFT2Font>
  31     GetOrMakeFont(const nsAString& aName, const gfxFontStyle *aStyle,
  32                   bool aNeedsBold = false);
  33
  34     static already_AddRefed<gfxFT2Font>
  35     GetOrMakeFont(FT2FontEntry *aFontEntry, const gfxFontStyle *aStyle,
  36                   bool aNeedsBold = false);
  37
  38     struct CachedGlyphData {
  39         CachedGlyphData()
  40             : glyphIndex(0xffffffffU) { }
  41
  42         CachedGlyphData(uint32_t gid)
  43             : glyphIndex(gid) { }
  44
  45         uint32_t glyphIndex;
  46         int32_t lsbDelta;
  47         int32_t rsbDelta;
  48         int32_t xAdvance;
  49     };
  50
  51     const CachedGlyphData* GetGlyphDataForChar(uint32_t ch) {
  52         CharGlyphMapEntryType *entry = mCharGlyphCache.PutEntry(ch);
  53
  54         if (!entry)
  55             return nullptr;
  56
  57         if (entry->mData.glyphIndex == 0xffffffffU) {
  58             // this is a new entry, fill it
  59             FillGlyphDataForChar(ch, &entry->mData);
  60         }
  61
  62         return &entry->mData;
  63     }
  64
  65     virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
  66                                         FontCacheSizes* aSizes) const;
  67     virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
  68                                         FontCacheSizes* aSizes) const;
  69
  70 #ifdef USE_SKIA
  71     virtual mozilla::TemporaryRef<mozilla::gfx::GlyphRenderingOptions> GetGlyphRenderingOptions();
  72 #endif
  73
  74 protected:
  75     virtual bool ShapeText(gfxContext      *aContext,
  76                            const char16_t *aText,
  77                            uint32_t         aOffset,
  78                            uint32_t         aLength,
  79                            int32_t          aScript,
  80                            gfxShapedText   *aShapedText);
  81
  82     void FillGlyphDataForChar(uint32_t ch, CachedGlyphData *gd);
  83
  84     void AddRange(const char16_t *aText,
  85                   uint32_t         aOffset,
  86                   uint32_t         aLength,
  87                   gfxShapedText   *aShapedText);
  88
  89     typedef nsBaseHashtableET<nsUint32HashKey, CachedGlyphData> CharGlyphMapEntryType;
  90     typedef nsTHashtable<CharGlyphMapEntryType> CharGlyphMap;
  91     CharGlyphMap mCharGlyphCache;
  92 };
  93
  94 #endif /* GFX_FT2FONTS_H */
  95