зеркало из https://github.com/mozilla/gecko-dev.git
73 строки
2.7 KiB
C++
73 строки
2.7 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_FT2FONTBASE_H
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#define GFX_FT2FONTBASE_H
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#include "cairo.h"
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#include "gfxContext.h"
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#include "gfxFont.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/UnscaledFontFreeType.h"
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#include "nsDataHashtable.h"
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#include "nsHashKeys.h"
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class gfxFT2FontBase : public gfxFont {
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public:
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gfxFT2FontBase(const RefPtr<mozilla::gfx::UnscaledFontFreeType>& aUnscaledFont,
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cairo_scaled_font_t *aScaledFont,
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gfxFontEntry *aFontEntry,
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const gfxFontStyle *aFontStyle);
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virtual ~gfxFT2FontBase();
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uint32_t GetGlyph(uint32_t aCharCode);
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void GetGlyphExtents(uint32_t aGlyph,
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cairo_text_extents_t* aExtents);
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virtual uint32_t GetSpaceGlyph() override;
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virtual bool ProvidesGetGlyph() const override { return true; }
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virtual uint32_t GetGlyph(uint32_t unicode,
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uint32_t variation_selector) override;
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virtual bool ProvidesGlyphWidths() const override { return true; }
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virtual int32_t GetGlyphWidth(DrawTarget& aDrawTarget,
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uint16_t aGID) override;
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virtual bool SetupCairoFont(DrawTarget* aDrawTarget) override;
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virtual FontType GetType() const override { return FONT_TYPE_FT2; }
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static void SetupVarCoords(FT_MM_Var* aMMVar,
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const nsTArray<gfxFontVariation>& aVariations,
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nsTArray<FT_Fixed>* aCoords);
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private:
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uint32_t GetCharExtents(char aChar, cairo_text_extents_t* aExtents);
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uint32_t GetCharWidth(char aChar, gfxFloat* aWidth);
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// Get advance of a single glyph from FreeType, and return true;
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// or return false if we should fall back to getting the glyph
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// extents from cairo instead.
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bool GetFTGlyphAdvance(uint16_t aGID, int32_t* aWidth);
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void InitMetrics();
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protected:
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virtual const Metrics& GetHorizontalMetrics() override;
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uint32_t mSpaceGlyph;
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Metrics mMetrics;
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bool mEmbolden;
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// For variation/multiple-master fonts, this will be an array of the values
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// for each axis, as specified by mStyle.variationSettings (or the font's
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// default for axes not present in variationSettings). Values here are in
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// freetype's 16.16 fixed-point format, and clamped to the valid min/max
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// range reported by the face.
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nsTArray<FT_Fixed> mCoords;
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mozilla::UniquePtr<nsDataHashtable<nsUint32HashKey,int32_t>> mGlyphWidths;
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};
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#endif /* GFX_FT2FONTBASE_H */
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