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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_MACFONT_H
#define GFX_MACFONT_H
#include "mozilla/MemoryReporting.h"
#include "gfxFont.h"
#include <CoreText/CoreText.h>
#include "mozilla/gfx/UnscaledFontMac.h"
class CTFontEntry;
class gfxMacFont final : public gfxFont {
public:
gfxMacFont(const RefPtr<mozilla::gfx::UnscaledFontMac>& aUnscaledFont,
CTFontEntry* aFontEntry, const gfxFontStyle* aFontStyle);
CGFontRef GetCGFontRef() const { return mCGFont; }
/* override Measure to add padding for antialiasing */
RunMetrics Measure(const gfxTextRun* aTextRun, uint32_t aStart, uint32_t aEnd,
BoundingBoxType aBoundingBoxType,
DrawTarget* aDrawTargetForTightBoundingBox,
Spacing* aSpacing,
mozilla::gfx::ShapedTextFlags aOrientation) override;
// We need to provide hinted (non-linear) glyph widths if using a font
// with embedded color bitmaps (Apple Color Emoji), as Core Text renders
// the glyphs with non-linear scaling at small pixel sizes.
bool ProvidesGlyphWidths() const override {
return mVariationFont ||
mFontEntry->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x'));
}
int32_t GetGlyphWidth(uint16_t aGID) override;
bool GetGlyphBounds(uint16_t aGID, gfxRect* aBounds, bool aTight) override;
already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
const TextRunDrawParams& aRunParams) override;
bool ShouldRoundXOffset(cairo_t* aCairo) const override;
void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const override;
void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
FontCacheSizes* aSizes) const override;
FontType GetType() const override { return FONT_TYPE_MAC; }
bool UseNativeColrFontSupport() const override;
protected:
~gfxMacFont() override;
const Metrics& GetHorizontalMetrics() const override { return mMetrics; }
// override to prefer CoreText shaping with fonts that depend on AAT
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;
void InitMetrics();
void InitMetricsFromPlatform();
// Get width and glyph ID for a character; uses aConvFactor
// to convert font units as returned by CG to actual dimensions
gfxFloat GetCharWidth(CFDataRef aCmap, char16_t aUniChar, uint32_t* aGlyphID,
gfxFloat aConvFactor);
// a strong reference to the CoreGraphics font
CGFontRef mCGFont;
// a Core Text font reference, created only if we're using CT to measure
// glyph widths; otherwise null.
CTFontRef mCTFont;
mozilla::UniquePtr<gfxFontShaper> mCoreTextShaper;
Metrics mMetrics;
bool mVariationFont; // true if font has OpenType variations
};
#endif /* GFX_MACFONT_H */
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