| /* |
| * This file is part of the internal font implementation. |
| * |
| * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved. |
| * Copyright (C) 2007-2008 Torch Mobile, Inc. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #ifndef SKY_ENGINE_PLATFORM_FONTS_SIMPLEFONTDATA_H_ |
| #define SKY_ENGINE_PLATFORM_FONTS_SIMPLEFONTDATA_H_ |
| |
| #include "sky/engine/platform/PlatformExport.h" |
| #include "sky/engine/platform/fonts/CustomFontData.h" |
| #include "sky/engine/platform/fonts/FontBaseline.h" |
| #include "sky/engine/platform/fonts/FontData.h" |
| #include "sky/engine/platform/fonts/FontMetrics.h" |
| #include "sky/engine/platform/fonts/FontPlatformData.h" |
| #include "sky/engine/platform/fonts/GlyphMetricsMap.h" |
| #include "sky/engine/platform/fonts/GlyphPageTreeNode.h" |
| #include "sky/engine/platform/fonts/TypesettingFeatures.h" |
| #include "sky/engine/platform/fonts/opentype/OpenTypeVerticalData.h" |
| #include "sky/engine/platform/geometry/FloatRect.h" |
| #include "sky/engine/wtf/OwnPtr.h" |
| #include "sky/engine/wtf/PassOwnPtr.h" |
| #include "sky/engine/wtf/text/StringHash.h" |
| |
| namespace blink { |
| |
| class FontDescription; |
| |
| enum FontDataVariant { AutoVariant, NormalVariant, SmallCapsVariant, EmphasisMarkVariant, BrokenIdeographVariant }; |
| enum Pitch { UnknownPitch, FixedPitch, VariablePitch }; |
| |
| class PLATFORM_EXPORT SimpleFontData : public FontData { |
| public: |
| // Used to create platform fonts. |
| static PassRefPtr<SimpleFontData> create(const FontPlatformData& platformData, PassRefPtr<CustomFontData> customData = nullptr, bool isTextOrientationFallback = false) |
| { |
| return adoptRef(new SimpleFontData(platformData, customData, isTextOrientationFallback)); |
| } |
| |
| // Used to create SVG Fonts. |
| static PassRefPtr<SimpleFontData> create(PassRefPtr<CustomFontData> customData, float fontSize, bool syntheticBold, bool syntheticItalic) |
| { |
| return adoptRef(new SimpleFontData(customData, fontSize, syntheticBold, syntheticItalic)); |
| } |
| |
| virtual ~SimpleFontData(); |
| |
| static const SimpleFontData* systemFallback() { return reinterpret_cast<const SimpleFontData*>(-1); } |
| |
| const FontPlatformData& platformData() const { return m_platformData; } |
| #if ENABLE(OPENTYPE_VERTICAL) |
| const OpenTypeVerticalData* verticalData() const { return m_verticalData.get(); } |
| #endif |
| |
| PassRefPtr<SimpleFontData> smallCapsFontData(const FontDescription&) const; |
| PassRefPtr<SimpleFontData> emphasisMarkFontData(const FontDescription&) const; |
| PassRefPtr<SimpleFontData> brokenIdeographFontData() const; |
| |
| PassRefPtr<SimpleFontData> variantFontData(const FontDescription& description, FontDataVariant variant) const |
| { |
| switch (variant) { |
| case SmallCapsVariant: |
| return smallCapsFontData(description); |
| case EmphasisMarkVariant: |
| return emphasisMarkFontData(description); |
| case BrokenIdeographVariant: |
| return brokenIdeographFontData(); |
| case AutoVariant: |
| case NormalVariant: |
| break; |
| } |
| ASSERT_NOT_REACHED(); |
| return const_cast<SimpleFontData*>(this); |
| } |
| |
| PassRefPtr<SimpleFontData> verticalRightOrientationFontData() const; |
| PassRefPtr<SimpleFontData> uprightOrientationFontData() const; |
| |
| bool hasVerticalGlyphs() const { return m_hasVerticalGlyphs; } |
| bool isTextOrientationFallback() const { return m_isTextOrientationFallback; } |
| |
| FontMetrics& fontMetrics() { return m_fontMetrics; } |
| const FontMetrics& fontMetrics() const { return m_fontMetrics; } |
| float sizePerUnit() const { return platformData().size() / (fontMetrics().unitsPerEm() ? fontMetrics().unitsPerEm() : 1); } |
| |
| float maxCharWidth() const { return m_maxCharWidth; } |
| void setMaxCharWidth(float maxCharWidth) { m_maxCharWidth = maxCharWidth; } |
| |
| float avgCharWidth() const { return m_avgCharWidth; } |
| void setAvgCharWidth(float avgCharWidth) { m_avgCharWidth = avgCharWidth; } |
| |
| FloatRect boundsForGlyph(Glyph) const; |
| float widthForGlyph(Glyph glyph) const; |
| FloatRect platformBoundsForGlyph(Glyph) const; |
| float platformWidthForGlyph(Glyph) const; |
| |
| float spaceWidth() const { return m_spaceWidth; } |
| void setSpaceWidth(float spaceWidth) { m_spaceWidth = spaceWidth; } |
| |
| Glyph spaceGlyph() const { return m_spaceGlyph; } |
| void setSpaceGlyph(Glyph spaceGlyph) { m_spaceGlyph = spaceGlyph; } |
| Glyph zeroWidthSpaceGlyph() const { return m_zeroWidthSpaceGlyph; } |
| void setZeroWidthSpaceGlyph(Glyph spaceGlyph) { m_zeroWidthSpaceGlyph = spaceGlyph; } |
| bool isZeroWidthSpaceGlyph(Glyph glyph) const { return glyph == m_zeroWidthSpaceGlyph && glyph; } |
| Glyph zeroGlyph() const { return m_zeroGlyph; } |
| void setZeroGlyph(Glyph zeroGlyph) { m_zeroGlyph = zeroGlyph; } |
| |
| virtual const SimpleFontData* fontDataForCharacter(UChar32) const override; |
| |
| Glyph glyphForCharacter(UChar32) const; |
| |
| void determinePitch(); |
| Pitch pitch() const { return m_treatAsFixedPitch ? FixedPitch : VariablePitch; } |
| |
| bool isSVGFont() const { return m_customFontData && m_customFontData->isSVGFont(); } |
| virtual bool isCustomFont() const override { return m_customFontData; } |
| virtual bool isLoading() const override { return m_customFontData ? m_customFontData->isLoading() : false; } |
| virtual bool isLoadingFallback() const override { return m_customFontData ? m_customFontData->isLoadingFallback() : false; } |
| virtual bool isSegmented() const override; |
| virtual bool shouldSkipDrawing() const override { return m_customFontData && m_customFontData->shouldSkipDrawing(); } |
| |
| const GlyphData& missingGlyphData() const { return m_missingGlyphData; } |
| void setMissingGlyphData(const GlyphData& glyphData) { m_missingGlyphData = glyphData; } |
| |
| #ifndef NDEBUG |
| virtual String description() const override; |
| #endif |
| |
| bool canRenderCombiningCharacterSequence(const UChar*, size_t) const; |
| |
| PassRefPtr<CustomFontData> customFontData() const { return m_customFontData; } |
| |
| // Implemented by the platform. |
| virtual bool fillGlyphPage(GlyphPage* pageToFill, unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength) const; |
| |
| protected: |
| SimpleFontData(const FontPlatformData&, PassRefPtr<CustomFontData> customData, bool isTextOrientationFallback = false); |
| |
| SimpleFontData(PassRefPtr<CustomFontData> customData, float fontSize, bool syntheticBold, bool syntheticItalic); |
| |
| private: |
| void platformInit(); |
| void platformGlyphInit(); |
| void platformCharWidthInit(); |
| void platformDestroy(); |
| |
| void initCharWidths(); |
| |
| PassRefPtr<SimpleFontData> createScaledFontData(const FontDescription&, float scaleFactor) const; |
| PassRefPtr<SimpleFontData> platformCreateScaledFontData(const FontDescription&, float scaleFactor) const; |
| |
| FontMetrics m_fontMetrics; |
| float m_maxCharWidth; |
| float m_avgCharWidth; |
| |
| FontPlatformData m_platformData; |
| |
| mutable OwnPtr<GlyphMetricsMap<FloatRect> > m_glyphToBoundsMap; |
| mutable GlyphMetricsMap<float> m_glyphToWidthMap; |
| |
| bool m_treatAsFixedPitch; |
| |
| bool m_isTextOrientationFallback; |
| bool m_isBrokenIdeographFallback; |
| #if ENABLE(OPENTYPE_VERTICAL) |
| RefPtr<OpenTypeVerticalData> m_verticalData; |
| #endif |
| bool m_hasVerticalGlyphs; |
| |
| Glyph m_spaceGlyph; |
| float m_spaceWidth; |
| Glyph m_zeroGlyph; |
| |
| Glyph m_zeroWidthSpaceGlyph; |
| |
| GlyphData m_missingGlyphData; |
| |
| struct DerivedFontData { |
| static PassOwnPtr<DerivedFontData> create(bool forCustomFont); |
| ~DerivedFontData(); |
| |
| bool forCustomFont; |
| RefPtr<SimpleFontData> smallCaps; |
| RefPtr<SimpleFontData> emphasisMark; |
| RefPtr<SimpleFontData> brokenIdeograph; |
| RefPtr<SimpleFontData> verticalRightOrientation; |
| RefPtr<SimpleFontData> uprightOrientation; |
| |
| private: |
| DerivedFontData(bool custom) |
| : forCustomFont(custom) |
| { |
| } |
| }; |
| |
| mutable OwnPtr<DerivedFontData> m_derivedFontData; |
| |
| RefPtr<CustomFontData> m_customFontData; |
| |
| mutable OwnPtr<HashMap<String, bool> > m_combiningCharacterSequenceSupport; |
| }; |
| |
| ALWAYS_INLINE FloatRect SimpleFontData::boundsForGlyph(Glyph glyph) const |
| { |
| if (isZeroWidthSpaceGlyph(glyph)) |
| return FloatRect(); |
| |
| FloatRect bounds; |
| if (m_glyphToBoundsMap) { |
| bounds = m_glyphToBoundsMap->metricsForGlyph(glyph); |
| if (bounds.width() != cGlyphSizeUnknown) |
| return bounds; |
| } |
| |
| bounds = platformBoundsForGlyph(glyph); |
| if (!m_glyphToBoundsMap) |
| m_glyphToBoundsMap = adoptPtr(new GlyphMetricsMap<FloatRect>); |
| m_glyphToBoundsMap->setMetricsForGlyph(glyph, bounds); |
| return bounds; |
| } |
| |
| ALWAYS_INLINE float SimpleFontData::widthForGlyph(Glyph glyph) const |
| { |
| if (isZeroWidthSpaceGlyph(glyph)) |
| return 0; |
| |
| float width = m_glyphToWidthMap.metricsForGlyph(glyph); |
| if (width != cGlyphSizeUnknown) |
| return width; |
| |
| #if ENABLE(OPENTYPE_VERTICAL) |
| if (m_verticalData) |
| width = m_verticalData->advanceHeight(this, glyph); |
| else |
| #endif |
| width = platformWidthForGlyph(glyph); |
| |
| m_glyphToWidthMap.setMetricsForGlyph(glyph, width); |
| return width; |
| } |
| |
| DEFINE_FONT_DATA_TYPE_CASTS(SimpleFontData, false); |
| |
| } // namespace blink |
| #endif // SKY_ENGINE_PLATFORM_FONTS_SIMPLEFONTDATA_H_ |