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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 */
#include "mozilla/MemoryReporting.h"
#include "gfxFont.h"
#include <ApplicationServices/ApplicationServices.h>
#include "mozilla/gfx/UnscaledFontMac.h"
class MacOSFontEntry;
class gfxMacFont final : public gfxFont {
gfxMacFont(const RefPtr<mozilla::gfx::UnscaledFontMac>& aUnscaledFont, MacOSFontEntry* 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) const 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;
// Helper to create a CTFont from a CGFont, with optional font descriptor
// (for features), and copying any variations that were set on the CGFont.
// This is public so that gfxCoreTextShaper can also use it.
static CTFontRef CreateCTFontFromCGFontWithVariations(CGFontRef aCGFont, CGFloat aSize,
bool aInstalledFont,
CTFontDescriptorRef aFontDesc = nullptr);
~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;
nscolor mFontSmoothingBackgroundColor;
bool mVariationFont; // true if font has OpenType variations
#endif /* GFX_MACFONT_H */