1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- 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 <ApplicationServices/ApplicationServices.h> 12 13 #include "mozilla/gfx/UnscaledFontMac.h" 14 15 class MacOSFontEntry; 16 17 class gfxMacFont : public gfxFont { 18 public: 19 gfxMacFont(const RefPtr<mozilla::gfx::UnscaledFontMac>& aUnscaledFont, MacOSFontEntry* aFontEntry, 20 const gfxFontStyle* aFontStyle); 21 22 virtual ~gfxMacFont(); 23 GetCGFontRef()24 CGFontRef GetCGFontRef() const { return mCGFont; } 25 26 /* override Measure to add padding for antialiasing */ 27 RunMetrics Measure(const gfxTextRun* aTextRun, uint32_t aStart, uint32_t aEnd, 28 BoundingBoxType aBoundingBoxType, DrawTarget* aDrawTargetForTightBoundingBox, 29 Spacing* aSpacing, mozilla::gfx::ShapedTextFlags aOrientation) override; 30 31 // We need to provide hinted (non-linear) glyph widths if using a font 32 // with embedded color bitmaps (Apple Color Emoji), as Core Text renders 33 // the glyphs with non-linear scaling at small pixel sizes. ProvidesGlyphWidths()34 bool ProvidesGlyphWidths() const override { 35 return mVariationFont || mFontEntry->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x')); 36 } 37 38 int32_t GetGlyphWidth(uint16_t aGID) override; 39 40 bool GetGlyphBounds(uint16_t aGID, gfxRect* aBounds, bool aTight) override; 41 42 already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont( 43 mozilla::gfx::DrawTarget* aTarget) override; 44 45 bool ShouldRoundXOffset(cairo_t* aCairo) const override; 46 47 void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf, 48 FontCacheSizes* aSizes) const override; 49 void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf, 50 FontCacheSizes* aSizes) const override; 51 GetType()52 FontType GetType() const override { return FONT_TYPE_MAC; } 53 54 // Helper to create a CTFont from a CGFont, with optional font descriptor 55 // (for features), and copying any variations that were set on the CGFont. 56 // This is public so that gfxCoreTextShaper can also use it. 57 static CTFontRef CreateCTFontFromCGFontWithVariations(CGFontRef aCGFont, CGFloat aSize, 58 bool aInstalledFont, 59 CTFontDescriptorRef aFontDesc = nullptr); 60 61 protected: GetHorizontalMetrics()62 const Metrics& GetHorizontalMetrics() override { return mMetrics; } 63 64 // override to prefer CoreText shaping with fonts that depend on AAT 65 bool ShapeText(DrawTarget* aDrawTarget, const char16_t* aText, uint32_t aOffset, uint32_t aLength, 66 Script aScript, nsAtom* aLanguage, bool aVertical, RoundingFlags aRounding, 67 gfxShapedText* aShapedText) override; 68 69 void InitMetrics(); 70 void InitMetricsFromPlatform(); 71 72 // Get width and glyph ID for a character; uses aConvFactor 73 // to convert font units as returned by CG to actual dimensions 74 gfxFloat GetCharWidth(CFDataRef aCmap, char16_t aUniChar, uint32_t* aGlyphID, 75 gfxFloat aConvFactor); 76 77 // a strong reference to the CoreGraphics font 78 CGFontRef mCGFont; 79 80 // a Core Text font reference, created only if we're using CT to measure 81 // glyph widths; otherwise null. 82 CTFontRef mCTFont; 83 84 mozilla::UniquePtr<gfxFontShaper> mCoreTextShaper; 85 86 Metrics mMetrics; 87 nscolor mFontSmoothingBackgroundColor; 88 89 bool mVariationFont; // true if font has OpenType variations 90 }; 91 92 #endif /* GFX_MACFONT_H */ 93