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4963ce29fb
Depending on the current transform, Skia applies either subpixel rounding or integer rounding to different coordinate axes of the transformed glyph position. If we don't correctly predict which of these are applied, we may have aliased cache entries that round to the same value in DrawTargetWebgl but for which Skia under the hood rounds in entirely different directions. When this happens, glyphs can get hinted to the wrong direction. To fix this, we need to ensure that we appropriately apply either subpixel rounding or integer rounding in the same manner as Skia. Differential Revision: https://phabricator.services.mozilla.com/D149350
103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 MOZILLA_GFX_SCALEDFONTMAC_H_
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#define MOZILLA_GFX_SCALEDFONTMAC_H_
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#ifdef MOZ_WIDGET_COCOA
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# include <ApplicationServices/ApplicationServices.h>
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#else
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# include <CoreGraphics/CoreGraphics.h>
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# include <CoreText/CoreText.h>
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#endif
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#include "2D.h"
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#include "ScaledFontBase.h"
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namespace mozilla {
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namespace gfx {
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class UnscaledFontMac;
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class ScaledFontMac : public ScaledFontBase {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(ScaledFontMac, override)
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ScaledFontMac(
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CGFontRef aFont, const RefPtr<UnscaledFont>& aUnscaledFont, Float aSize,
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bool aOwnsFont = false,
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const DeviceColor& aFontSmoothingBackgroundColor = DeviceColor(),
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bool aUseFontSmoothing = true, bool aApplySyntheticBold = false,
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bool aHasColorGlyphs = false);
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ScaledFontMac(
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CTFontRef aFont, const RefPtr<UnscaledFont>& aUnscaledFont,
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const DeviceColor& aFontSmoothingBackgroundColor = DeviceColor(),
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bool aUseFontSmoothing = true, bool aApplySyntheticBold = false,
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bool aHasColorGlyphs = false);
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~ScaledFontMac();
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FontType GetType() const override { return FontType::MAC; }
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SkTypeface* CreateSkTypeface() override;
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void SetupSkFontDrawOptions(SkFont& aFont) override;
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already_AddRefed<Path> GetPathForGlyphs(const GlyphBuffer& aBuffer,
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const DrawTarget* aTarget) override;
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bool GetFontInstanceData(FontInstanceDataOutput aCb, void* aBaton) override;
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bool GetWRFontInstanceOptions(
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Maybe<wr::FontInstanceOptions>* aOutOptions,
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Maybe<wr::FontInstancePlatformOptions>* aOutPlatformOptions,
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std::vector<FontVariation>* aOutVariations) override;
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bool CanSerialize() override { return true; }
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bool MayUseBitmaps() override { return mHasColorGlyphs; }
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bool UseSubpixelPosition() const override { return true; }
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DeviceColor FontSmoothingBackgroundColor() {
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return mFontSmoothingBackgroundColor;
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}
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cairo_font_face_t* CreateCairoFontFace(
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cairo_font_options_t* aFontOptions) override;
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private:
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friend class DrawTargetSkia;
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friend class UnscaledFontMac;
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CGFontRef mFont;
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CTFontRef
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mCTFont; // only created if CTFontDrawGlyphs is available, otherwise null
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DeviceColor mFontSmoothingBackgroundColor;
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bool mUseFontSmoothing;
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bool mApplySyntheticBold;
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bool mHasColorGlyphs;
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struct InstanceData {
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explicit InstanceData(ScaledFontMac* aScaledFont)
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: mFontSmoothingBackgroundColor(
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aScaledFont->mFontSmoothingBackgroundColor),
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mUseFontSmoothing(aScaledFont->mUseFontSmoothing),
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mApplySyntheticBold(aScaledFont->mApplySyntheticBold),
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mHasColorGlyphs(aScaledFont->mHasColorGlyphs) {}
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InstanceData(const wr::FontInstanceOptions* aOptions,
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const wr::FontInstancePlatformOptions* aPlatformOptions);
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DeviceColor mFontSmoothingBackgroundColor;
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bool mUseFontSmoothing;
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bool mApplySyntheticBold;
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bool mHasColorGlyphs;
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};
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_SCALEDFONTMAC_H_ */
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