forked from mirrors/gecko-dev
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
74 lines
2.1 KiB
C++
74 lines
2.1 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_SCALEDFONTCAIRO_H_
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#define MOZILLA_GFX_SCALEDFONTCAIRO_H_
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#include "ScaledFontBase.h"
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#include <cairo-ft.h>
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namespace mozilla {
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namespace gfx {
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class UnscaledFontFreeType;
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class ScaledFontFreeType : public ScaledFontBase {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(ScaledFontFreeType, override)
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ScaledFontFreeType(RefPtr<SharedFTFace>&& aFace,
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const RefPtr<UnscaledFont>& aUnscaledFont, Float aSize,
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bool aApplySyntheticBold = false);
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FontType GetType() const override { return FontType::FREETYPE; }
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SkTypeface* CreateSkTypeface() override;
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void SetupSkFontDrawOptions(SkFont& aFont) override;
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AntialiasMode GetDefaultAAMode() override { return AntialiasMode::GRAY; }
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bool UseSubpixelPosition() const override;
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bool CanSerialize() override { return true; }
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bool MayUseBitmaps() 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 HasVariationSettings() override;
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protected:
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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 UnscaledFontFreeType;
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RefPtr<SharedFTFace> mFace;
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bool mApplySyntheticBold;
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struct InstanceData {
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explicit InstanceData(ScaledFontFreeType* aScaledFont)
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: mApplySyntheticBold(aScaledFont->mApplySyntheticBold) {}
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InstanceData(const wr::FontInstanceOptions* aOptions,
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const wr::FontInstancePlatformOptions* aPlatformOptions);
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bool mApplySyntheticBold;
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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_SCALEDFONTCAIRO_H_ */
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