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2b03a82ba0
This removes a lot of old cruft in thebes to instantiate Cairo scaled fonts. Instead, we only instantiate the Cairo scaled font inside Moz2D when we actually need it for DrawTargetCairo. This thus gets rid of the duplicated code we had inside both Moz2D and thebes to deal with Cairo scaled fonts. Differential Revision: https://phabricator.services.mozilla.com/D47297 --HG-- extra : moz-landing-system : lando
108 lines
3.4 KiB
C++
108 lines
3.4 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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/**
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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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uint32_t GetSpaceGlyph() override;
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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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RunMetrics Measure(const gfxTextRun* aTextRun, 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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bool ProvidesGlyphWidths() const override;
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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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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_DWRITE; }
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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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protected:
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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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gfxFloat MeasureGlyphWidth(uint16_t aGlyph);
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DWRITE_MEASURING_MODE GetMeasuringMode() const;
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bool GetForceGDIClassic() const;
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RefPtr<IDWriteFontFace> mFontFace;
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RefPtr<IDWriteFontFace1> mFontFace1; // may be unavailable on older DWrite
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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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