зеркало из https://github.com/mozilla/gecko-dev.git
97 строки
3.7 KiB
C++
97 строки
3.7 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_MACFONT_H
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#define GFX_MACFONT_H
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#include "mozilla/MemoryReporting.h"
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#include "gfxFont.h"
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#include <ApplicationServices/ApplicationServices.h>
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#include "mozilla/gfx/UnscaledFontMac.h"
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class MacOSFontEntry;
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class gfxMacFont : public gfxFont {
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public:
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gfxMacFont(const RefPtr<mozilla::gfx::UnscaledFontMac>& aUnscaledFont, MacOSFontEntry* aFontEntry,
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const gfxFontStyle* aFontStyle);
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virtual ~gfxMacFont();
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CGFontRef GetCGFontRef() const { return mCGFont; }
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/* overrides for the pure virtual methods in gfxFont */
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uint32_t GetSpaceGlyph() override { return mSpaceGlyph; }
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/* override Measure to add padding for antialiasing */
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RunMetrics Measure(const gfxTextRun* aTextRun, uint32_t aStart, uint32_t aEnd,
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BoundingBoxType aBoundingBoxType, DrawTarget* aDrawTargetForTightBoundingBox,
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Spacing* aSpacing, mozilla::gfx::ShapedTextFlags aOrientation) override;
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// We need to provide hinted (non-linear) glyph widths if using a font
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// with embedded color bitmaps (Apple Color Emoji), as Core Text renders
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// the glyphs with non-linear scaling at small pixel sizes.
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bool ProvidesGlyphWidths() const override {
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return mVariationFont || mFontEntry->HasFontTable(TRUETYPE_TAG('s', 'b', 'i', 'x'));
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}
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int32_t GetGlyphWidth(uint16_t aGID) override;
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bool GetGlyphBounds(uint16_t aGID, gfxRect* aBounds, bool aTight) override;
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already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
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mozilla::gfx::DrawTarget* aTarget) override;
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bool ShouldRoundXOffset(cairo_t* aCairo) const override;
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void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontCacheSizes* aSizes) const override;
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void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontCacheSizes* aSizes) const override;
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FontType GetType() const override { return FONT_TYPE_MAC; }
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// Helper to create a CTFont from a CGFont, with optional font descriptor
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// (for features), and copying any variations that were set on the CGFont.
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// This is public so that gfxCoreTextShaper can also use it.
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static CTFontRef CreateCTFontFromCGFontWithVariations(CGFontRef aCGFont, CGFloat aSize,
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bool aInstalledFont,
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CTFontDescriptorRef aFontDesc = nullptr);
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protected:
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const Metrics& GetHorizontalMetrics() override { return mMetrics; }
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// override to prefer CoreText shaping with fonts that depend on AAT
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bool ShapeText(DrawTarget* aDrawTarget, const char16_t* aText, uint32_t aOffset, uint32_t aLength,
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Script aScript, bool aVertical, RoundingFlags aRounding,
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gfxShapedText* aShapedText) override;
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void InitMetrics();
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void InitMetricsFromPlatform();
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// Get width and glyph ID for a character; uses aConvFactor
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// to convert font units as returned by CG to actual dimensions
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gfxFloat GetCharWidth(CFDataRef aCmap, char16_t aUniChar, uint32_t* aGlyphID,
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gfxFloat aConvFactor);
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// a strong reference to the CoreGraphics font
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CGFontRef mCGFont;
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// a Core Text font reference, created only if we're using CT to measure
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// glyph widths; otherwise null.
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CTFontRef mCTFont;
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mozilla::UniquePtr<gfxFontShaper> mCoreTextShaper;
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Metrics mMetrics;
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uint32_t mSpaceGlyph;
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nscolor mFontSmoothingBackgroundColor;
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bool mVariationFont; // true if font has OpenType variations
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};
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#endif /* GFX_MACFONT_H */
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