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