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71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GFX_CORETEXTSHAPER_H
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#define GFX_CORETEXTSHAPER_H
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#include "gfxFont.h"
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#include <CoreText/CoreText.h>
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class gfxMacFont;
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class gfxCoreTextShaper : public gfxFontShaper {
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public:
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explicit gfxCoreTextShaper(gfxMacFont* aFont);
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virtual ~gfxCoreTextShaper();
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bool ShapeText(DrawTarget* aDrawTarget, const char16_t* aText,
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uint32_t aOffset, uint32_t aLength, Script aScript,
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nsAtom* aLanguage, bool aVertical, RoundingFlags aRounding,
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gfxShapedText* aShapedText) override;
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// clean up static objects that may have been cached
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static void Shutdown();
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// Flags used to track what AAT features should be enabled on the Core Text
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// font instance. (Internal; only public so that we can use the
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// MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS macro below.)
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enum FeatureFlags : uint8_t {
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kDefaultFeatures = 0x00,
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// bit flags for non-default feature settings we might need
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// to use, which will require separate font instances
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kDisableLigatures = 0x01,
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kAddSmallCaps = 0x02,
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kIndicFeatures = 0x04,
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// number of font instances, indexed by OR-ing the flags above
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kMaxFontInstances = 8
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};
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protected:
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CTFontRef mCTFont[kMaxFontInstances];
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// attributes for shaping text with LTR or RTL directionality
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CFDictionaryRef mAttributesDictLTR;
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CFDictionaryRef mAttributesDictRTL;
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nsresult SetGlyphsFromRun(gfxShapedText* aShapedText, uint32_t aOffset,
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uint32_t aLength, CTRunRef aCTRun);
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CTFontRef CreateCTFontWithFeatures(CGFloat aSize,
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CTFontDescriptorRef aDescriptor);
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CFDictionaryRef CreateAttrDict(bool aRightToLeft);
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CFDictionaryRef CreateAttrDictWithoutDirection();
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static CTFontDescriptorRef CreateFontFeaturesDescriptor(
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const std::pair<SInt16, SInt16>* aFeatures, size_t aCount);
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static CTFontDescriptorRef GetFeaturesDescriptor(FeatureFlags aFeatureFlags);
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// cached font descriptors, created the first time they're needed
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static CTFontDescriptorRef sFeaturesDescriptor[kMaxFontInstances];
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};
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MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(gfxCoreTextShaper::FeatureFlags)
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#endif /* GFX_CORETEXTSHAPER_H */
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