зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
4.1 KiB
C++
112 строки
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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_GDIFONT_H
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#define GFX_GDIFONT_H
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#include "mozilla/MemoryReporting.h"
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#include "gfxFont.h"
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#include "gfxGDIFontList.h"
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#include "nsDataHashtable.h"
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#include "nsHashKeys.h"
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#include "cairo.h"
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#include "usp10.h"
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class gfxGDIFont : public gfxFont
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{
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public:
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gfxGDIFont(GDIFontEntry *aFontEntry,
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const gfxFontStyle *aFontStyle,
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AntialiasOption anAAOption = kAntialiasDefault);
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virtual ~gfxGDIFont();
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HFONT GetHFONT() { return mFont; }
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cairo_font_face_t* CairoFontFace() { return mFontFace; }
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/* overrides for the pure virtual methods in gfxFont */
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virtual uint32_t GetSpaceGlyph() override;
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virtual bool SetupCairoFont(DrawTarget* aDrawTarget) override;
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virtual already_AddRefed<mozilla::gfx::ScaledFont>
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GetScaledFont(DrawTarget *aTarget) override;
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/* override Measure to add padding for antialiasing */
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virtual RunMetrics Measure(const gfxTextRun *aTextRun,
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uint32_t aStart, uint32_t aEnd,
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BoundingBoxType aBoundingBoxType,
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DrawTarget *aDrawTargetForTightBoundingBox,
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Spacing *aSpacing,
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mozilla::gfx::ShapedTextFlags aOrientation) override;
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/* required for MathML to suppress effects of ClearType "padding" */
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mozilla::UniquePtr<gfxFont>
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CopyWithAntialiasOption(AntialiasOption anAAOption) override;
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// If the font has a cmap table, we handle it purely with harfbuzz;
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// but if not (e.g. .fon fonts), we'll use a GDI callback to get glyphs.
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virtual bool ProvidesGetGlyph() const override {
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return !mFontEntry->HasCmapTable();
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}
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virtual uint32_t GetGlyph(uint32_t aUnicode,
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uint32_t aVarSelector) override;
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virtual bool ProvidesGlyphWidths() const override { return true; }
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// get hinted glyph width in pixels as 16.16 fixed-point value
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virtual int32_t GetGlyphWidth(DrawTarget& aDrawTarget,
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uint16_t aGID) override;
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virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontCacheSizes* aSizes) const;
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virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontCacheSizes* aSizes) const;
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virtual FontType GetType() const override { return FONT_TYPE_GDI; }
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protected:
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virtual const Metrics& GetHorizontalMetrics() override;
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/* override to ensure the cairo font is set up properly */
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bool ShapeText(DrawTarget *aDrawTarget,
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const char16_t *aText,
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uint32_t aOffset,
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uint32_t aLength,
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Script aScript,
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bool aVertical,
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RoundingFlags aRounding,
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gfxShapedText *aShapedText) override;
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void Initialize(); // creates metrics and Cairo fonts
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// Fill the given LOGFONT record according to our size.
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// (Synthetic italic is *not* handled here, because GDI may not reliably
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// use the face we expect if we tweak the lfItalic field, and because we
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// have generic support for this in gfxFont::Draw instead.)
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void FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize);
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HFONT mFont;
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cairo_font_face_t *mFontFace;
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Metrics *mMetrics;
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uint32_t mSpaceGlyph;
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bool mNeedsSyntheticBold;
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// cache of glyph IDs (used for non-sfnt fonts only)
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mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,uint32_t> > mGlyphIDs;
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SCRIPT_CACHE mScriptCache;
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// cache of glyph widths in 16.16 fixed-point pixels
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mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,int32_t> > mGlyphWidths;
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};
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#endif /* GFX_GDIFONT_H */
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