зеркало из https://github.com/mozilla/gecko-dev.git
115 строки
3.5 KiB
C++
115 строки
3.5 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_WINDOWSDWRITEFONTS_H
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#define GFX_WINDOWSDWRITEFONTS_H
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/UniquePtr.h"
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#include <dwrite_1.h>
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#include "gfxFont.h"
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#include "gfxUserFontSet.h"
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#include "nsDataHashtable.h"
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#include "nsHashKeys.h"
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#include "mozilla/gfx/gfxVars.h"
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#include "mozilla/gfx/UnscaledFontDWrite.h"
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struct _cairo_font_face;
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typedef _cairo_font_face cairo_font_face_t;
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/**
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* \brief Class representing a font face for a font entry.
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*/
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class gfxDWriteFont : public gfxFont {
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public:
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gfxDWriteFont(const RefPtr<mozilla::gfx::UnscaledFontDWrite> &aUnscaledFont,
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gfxFontEntry *aFontEntry, const gfxFontStyle *aFontStyle,
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RefPtr<IDWriteFontFace> aFontFace = nullptr,
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AntialiasOption = kAntialiasDefault);
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~gfxDWriteFont();
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static void UpdateSystemTextQuality();
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static void SystemTextQualityChanged();
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mozilla::UniquePtr<gfxFont> CopyWithAntialiasOption(
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AntialiasOption anAAOption) override;
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virtual uint32_t GetSpaceGlyph() override;
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virtual bool SetupCairoFont(DrawTarget *aDrawTarget) override;
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virtual bool AllowSubpixelAA() override { return mAllowManualShowGlyphs; }
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bool IsValid() const;
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IDWriteFontFace *GetFontFace();
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/* override Measure to add padding for antialiasing */
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virtual RunMetrics Measure(
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const gfxTextRun *aTextRun, uint32_t aStart, uint32_t aEnd,
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BoundingBoxType aBoundingBoxType,
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DrawTarget *aDrawTargetForTightBoundingBox, Spacing *aSpacing,
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mozilla::gfx::ShapedTextFlags aOrientation) override;
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virtual bool ProvidesGlyphWidths() const override;
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virtual int32_t GetGlyphWidth(uint16_t aGID) override;
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virtual void AddSizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontCacheSizes *aSizes) const override;
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virtual void AddSizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf,
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FontCacheSizes *aSizes) const override;
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virtual FontType GetType() const override { return FONT_TYPE_DWRITE; }
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virtual already_AddRefed<mozilla::gfx::ScaledFont> GetScaledFont(
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mozilla::gfx::DrawTarget *aTarget) override;
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protected:
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cairo_scaled_font_t *InitCairoScaledFont();
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virtual const Metrics &GetHorizontalMetrics() override;
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bool GetFakeMetricsForArialBlack(DWRITE_FONT_METRICS *aFontMetrics);
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void ComputeMetrics(AntialiasOption anAAOption);
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bool HasBitmapStrikeForSize(uint32_t aSize);
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cairo_font_face_t *CairoFontFace();
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gfxFloat MeasureGlyphWidth(uint16_t aGlyph);
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DWRITE_MEASURING_MODE GetMeasuringMode();
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bool GetForceGDIClassic();
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RefPtr<IDWriteFontFace> mFontFace;
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RefPtr<IDWriteFontFace1> mFontFace1; // may be unavailable on older DWrite
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cairo_font_face_t *mCairoFontFace;
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Metrics *mMetrics;
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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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uint32_t mSpaceGlyph;
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bool mUseSubpixelPositions;
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bool mAllowManualShowGlyphs;
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// Used to record the sUseClearType setting at the time mAzureScaledFont
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// was set up, so we can tell if it's stale and needs to be re-created.
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bool mAzureScaledFontUsedClearType;
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bool UsingClearType() {
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return mozilla::gfx::gfxVars::SystemTextQuality() == CLEARTYPE_QUALITY;
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}
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};
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#endif
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