/* -*- 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 */
