| /* |
| * Copyright (C) 2012 Koji Ishii <kojiishi@gmail.com> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #if ENABLE(OPENTYPE_VERTICAL) |
| #include "OpenTypeVerticalData.h" |
| |
| #include "FloatRect.h" |
| #include "Font.h" |
| #include "GlyphPage.h" |
| #include "OpenTypeTypes.h" |
| #include "SharedBuffer.h" |
| #include <wtf/RefPtr.h> |
| |
| |
| namespace WebCore { |
| using namespace std; |
| namespace OpenType { |
| |
| const uint32_t GSUBTag = OT_MAKE_TAG('G', 'S', 'U', 'B'); |
| const uint32_t HheaTag = OT_MAKE_TAG('h', 'h', 'e', 'a'); |
| const uint32_t HmtxTag = OT_MAKE_TAG('h', 'm', 't', 'x'); |
| const uint32_t VheaTag = OT_MAKE_TAG('v', 'h', 'e', 'a'); |
| const uint32_t VmtxTag = OT_MAKE_TAG('v', 'm', 't', 'x'); |
| const uint32_t VORGTag = OT_MAKE_TAG('V', 'O', 'R', 'G'); |
| |
| const uint32_t DefaultScriptTag = OT_MAKE_TAG('D', 'F', 'L', 'T'); |
| |
| const uint32_t VertFeatureTag = OT_MAKE_TAG('v', 'e', 'r', 't'); |
| |
| #pragma pack(1) |
| |
| struct HheaTable { |
| OpenType::Fixed version; |
| OpenType::Int16 ascender; |
| OpenType::Int16 descender; |
| OpenType::Int16 lineGap; |
| OpenType::Int16 advanceWidthMax; |
| OpenType::Int16 minLeftSideBearing; |
| OpenType::Int16 minRightSideBearing; |
| OpenType::Int16 xMaxExtent; |
| OpenType::Int16 caretSlopeRise; |
| OpenType::Int16 caretSlopeRun; |
| OpenType::Int16 caretOffset; |
| OpenType::Int16 reserved[4]; |
| OpenType::Int16 metricDataFormat; |
| OpenType::UInt16 numberOfHMetrics; |
| }; |
| |
| struct VheaTable { |
| OpenType::Fixed version; |
| OpenType::Int16 ascent; |
| OpenType::Int16 descent; |
| OpenType::Int16 lineGap; |
| OpenType::Int16 advanceHeightMax; |
| OpenType::Int16 minTopSideBearing; |
| OpenType::Int16 minBottomSideBearing; |
| OpenType::Int16 yMaxExtent; |
| OpenType::Int16 caretSlopeRise; |
| OpenType::Int16 caretSlopeRun; |
| OpenType::Int16 caretOffset; |
| OpenType::Int16 reserved[4]; |
| OpenType::Int16 metricDataFormat; |
| OpenType::UInt16 numOfLongVerMetrics; |
| }; |
| |
| struct HmtxTable { |
| struct Entry { |
| OpenType::UInt16 advanceWidth; |
| OpenType::Int16 lsb; |
| } entries[1]; |
| }; |
| |
| struct VmtxTable { |
| struct Entry { |
| OpenType::UInt16 advanceHeight; |
| OpenType::Int16 topSideBearing; |
| } entries[1]; |
| }; |
| |
| struct VORGTable { |
| OpenType::UInt16 majorVersion; |
| OpenType::UInt16 minorVersion; |
| OpenType::Int16 defaultVertOriginY; |
| OpenType::UInt16 numVertOriginYMetrics; |
| struct VertOriginYMetrics { |
| OpenType::UInt16 glyphIndex; |
| OpenType::Int16 vertOriginY; |
| } vertOriginYMetrics[1]; |
| |
| size_t requiredSize() const { return sizeof(*this) + sizeof(VertOriginYMetrics) * (numVertOriginYMetrics - 1); } |
| }; |
| |
| struct SubstitutionSubTable : TableBase { |
| OpenType::UInt16 substFormat; |
| OpenType::Offset coverageOffset; |
| |
| const CoverageTable* coverage(const SharedBuffer& buffer) const { return validateOffset<CoverageTable>(buffer, coverageOffset); } |
| }; |
| |
| struct SingleSubstitution2SubTable : SubstitutionSubTable { |
| OpenType::UInt16 glyphCount; |
| OpenType::GlyphID substitute[1]; |
| }; |
| |
| struct LookupTable : TableBase { |
| OpenType::UInt16 lookupType; |
| OpenType::UInt16 lookupFlag; |
| OpenType::UInt16 subTableCount; |
| OpenType::Offset subTableOffsets[1]; |
| // OpenType::UInt16 markFilteringSet; this field comes after variable length, so offset is determined dynamically. |
| |
| bool getSubstitutions(HashMap<Glyph, Glyph>* map, const SharedBuffer& buffer) const |
| { |
| uint16_t countSubTable = subTableCount; |
| if (!isValidEnd(buffer, &subTableOffsets[countSubTable])) |
| return false; |
| if (lookupType != 1) // "Single Substitution Subtable" is all what we support |
| return false; |
| for (uint16_t i = 0; i < countSubTable; ++i) { |
| const SubstitutionSubTable* substitution = validateOffset<SubstitutionSubTable>(buffer, subTableOffsets[i]); |
| if (!substitution) |
| return false; |
| const CoverageTable* coverage = substitution->coverage(buffer); |
| if (!coverage) |
| return false; |
| if (substitution->substFormat != 2) // "Single Substitution Format 2" is all what we support |
| return false; |
| const SingleSubstitution2SubTable* singleSubstitution2 = validatePtr<SingleSubstitution2SubTable>(buffer, substitution); |
| if (!singleSubstitution2) |
| return false; |
| uint16_t countTo = singleSubstitution2->glyphCount; |
| if (!isValidEnd(buffer, &singleSubstitution2->substitute[countTo])) |
| return false; |
| switch (coverage->coverageFormat) { |
| case 1: { // Coverage Format 1 (e.g., MS Gothic) |
| const Coverage1Table* coverage1 = validatePtr<Coverage1Table>(buffer, coverage); |
| if (!coverage1) |
| return false; |
| uint16_t countFrom = coverage1->glyphCount; |
| if (!isValidEnd(buffer, &coverage1->glyphArray[countFrom]) || countTo != countFrom) |
| return false; |
| for (uint16_t i = 0; i < countTo; ++i) |
| map->set(coverage1->glyphArray[i], singleSubstitution2->substitute[i]); |
| break; |
| } |
| case 2: { // Coverage Format 2 (e.g., Adobe Kozuka Gothic) |
| const Coverage2Table* coverage2 = validatePtr<Coverage2Table>(buffer, coverage); |
| if (!coverage2) |
| return false; |
| uint16_t countRange = coverage2->rangeCount; |
| if (!isValidEnd(buffer, &coverage2->ranges[countRange])) |
| return false; |
| for (uint16_t i = 0, indexTo = 0; i < countRange; ++i) { |
| uint16_t from = coverage2->ranges[i].start; |
| uint16_t fromEnd = coverage2->ranges[i].end + 1; // OpenType "end" is inclusive |
| if (indexTo + (fromEnd - from) > countTo) |
| return false; |
| for (; from != fromEnd; ++from, ++indexTo) |
| map->set(from, singleSubstitution2->substitute[indexTo]); |
| } |
| break; |
| } |
| default: |
| return false; |
| } |
| } |
| return true; |
| } |
| }; |
| |
| struct LookupList : TableBase { |
| OpenType::UInt16 lookupCount; |
| OpenType::Offset lookupOffsets[1]; |
| |
| const LookupTable* lookup(uint16_t index, const SharedBuffer& buffer) const |
| { |
| uint16_t count = lookupCount; |
| if (index >= count || !isValidEnd(buffer, &lookupOffsets[count])) |
| return 0; |
| return validateOffset<LookupTable>(buffer, lookupOffsets[index]); |
| } |
| }; |
| |
| struct FeatureTable : TableBase { |
| OpenType::Offset featureParams; |
| OpenType::UInt16 lookupCount; |
| OpenType::UInt16 lookupListIndex[1]; |
| |
| bool getGlyphSubstitutions(const LookupList* lookups, HashMap<Glyph, Glyph>* map, const SharedBuffer& buffer) const |
| { |
| uint16_t count = lookupCount; |
| if (!isValidEnd(buffer, &lookupListIndex[count])) |
| return false; |
| for (uint16_t i = 0; i < count; ++i) { |
| const LookupTable* lookup = lookups->lookup(lookupListIndex[i], buffer); |
| if (!lookup || !lookup->getSubstitutions(map, buffer)) |
| return false; |
| } |
| return true; |
| } |
| }; |
| |
| struct FeatureList : TableBase { |
| OpenType::UInt16 featureCount; |
| struct FeatureRecord { |
| OpenType::Tag featureTag; |
| OpenType::Offset featureOffset; |
| } features[1]; |
| |
| const FeatureTable* feature(uint16_t index, OpenType::Tag tag, const SharedBuffer& buffer) const |
| { |
| uint16_t count = featureCount; |
| if (index >= count || !isValidEnd(buffer, &features[count])) |
| return 0; |
| if (features[index].featureTag == tag) |
| return validateOffset<FeatureTable>(buffer, features[index].featureOffset); |
| return 0; |
| } |
| |
| const FeatureTable* findFeature(OpenType::Tag tag, const SharedBuffer& buffer) const |
| { |
| for (uint16_t i = 0; i < featureCount; ++i) { |
| if (isValidEnd(buffer, &features[i]) && features[i].featureTag == tag) |
| return validateOffset<FeatureTable>(buffer, features[i].featureOffset); |
| } |
| return 0; |
| } |
| }; |
| |
| struct LangSysTable : TableBase { |
| OpenType::Offset lookupOrder; |
| OpenType::UInt16 reqFeatureIndex; |
| OpenType::UInt16 featureCount; |
| OpenType::UInt16 featureIndex[1]; |
| |
| const FeatureTable* feature(OpenType::Tag featureTag, const FeatureList* features, const SharedBuffer& buffer) const |
| { |
| uint16_t count = featureCount; |
| if (!isValidEnd(buffer, &featureIndex[count])) |
| return 0; |
| for (uint16_t i = 0; i < count; ++i) { |
| const FeatureTable* featureTable = features->feature(featureIndex[i], featureTag, buffer); |
| if (featureTable) |
| return featureTable; |
| } |
| return 0; |
| } |
| }; |
| |
| struct ScriptTable : TableBase { |
| OpenType::Offset defaultLangSysOffset; |
| OpenType::UInt16 langSysCount; |
| struct LangSysRecord { |
| OpenType::Tag langSysTag; |
| OpenType::Offset langSysOffset; |
| } langSysRecords[1]; |
| |
| const LangSysTable* defaultLangSys(const SharedBuffer& buffer) const |
| { |
| uint16_t count = langSysCount; |
| if (!isValidEnd(buffer, &langSysRecords[count])) |
| return 0; |
| uint16_t offset = defaultLangSysOffset; |
| if (offset) |
| return validateOffset<LangSysTable>(buffer, offset); |
| if (count) |
| return validateOffset<LangSysTable>(buffer, langSysRecords[0].langSysOffset); |
| return 0; |
| } |
| }; |
| |
| struct ScriptList : TableBase { |
| OpenType::UInt16 scriptCount; |
| struct ScriptRecord { |
| OpenType::Tag scriptTag; |
| OpenType::Offset scriptOffset; |
| } scripts[1]; |
| |
| const ScriptTable* script(OpenType::Tag tag, const SharedBuffer& buffer) const |
| { |
| uint16_t count = scriptCount; |
| if (!isValidEnd(buffer, &scripts[count])) |
| return 0; |
| for (uint16_t i = 0; i < count; ++i) { |
| if (scripts[i].scriptTag == tag) |
| return validateOffset<ScriptTable>(buffer, scripts[i].scriptOffset); |
| } |
| return 0; |
| } |
| |
| const ScriptTable* defaultScript(const SharedBuffer& buffer) const |
| { |
| uint16_t count = scriptCount; |
| if (!count || !isValidEnd(buffer, &scripts[count])) |
| return 0; |
| const ScriptTable* scriptOfDefaultTag = script(OpenType::DefaultScriptTag, buffer); |
| if (scriptOfDefaultTag) |
| return scriptOfDefaultTag; |
| return validateOffset<ScriptTable>(buffer, scripts[0].scriptOffset); |
| } |
| |
| const LangSysTable* defaultLangSys(const SharedBuffer& buffer) const |
| { |
| const ScriptTable* scriptTable = defaultScript(buffer); |
| if (!scriptTable) |
| return 0; |
| return scriptTable->defaultLangSys(buffer); |
| } |
| }; |
| |
| struct GSUBTable : TableBase { |
| OpenType::Fixed version; |
| OpenType::Offset scriptListOffset; |
| OpenType::Offset featureListOffset; |
| OpenType::Offset lookupListOffset; |
| |
| const ScriptList* scriptList(const SharedBuffer& buffer) const { return validateOffset<ScriptList>(buffer, scriptListOffset); } |
| const FeatureList* featureList(const SharedBuffer& buffer) const { return validateOffset<FeatureList>(buffer, featureListOffset); } |
| const LookupList* lookupList(const SharedBuffer& buffer) const { return validateOffset<LookupList>(buffer, lookupListOffset); } |
| |
| const LangSysTable* defaultLangSys(const SharedBuffer& buffer) const |
| { |
| const ScriptList* scripts = scriptList(buffer); |
| if (!scripts) |
| return 0; |
| return scripts->defaultLangSys(buffer); |
| } |
| |
| const FeatureTable* feature(OpenType::Tag featureTag, const SharedBuffer& buffer) const |
| { |
| const LangSysTable* langSys = defaultLangSys(buffer); |
| const FeatureList* features = featureList(buffer); |
| if (!features) |
| return 0; |
| const FeatureTable* feature = 0; |
| if (langSys) |
| feature = langSys->feature(featureTag, features, buffer); |
| if (!feature) { |
| // If the font has no langSys table, or has no default script and the first script doesn't |
| // have the requested feature, then use the first matching feature directly. |
| feature = features->findFeature(featureTag, buffer); |
| } |
| return feature; |
| } |
| |
| bool getVerticalGlyphSubstitutions(HashMap<Glyph, Glyph>* map, const SharedBuffer& buffer) const |
| { |
| const FeatureTable* verticalFeatureTable = feature(OpenType::VertFeatureTag, buffer); |
| if (!verticalFeatureTable) |
| return false; |
| const LookupList* lookups = lookupList(buffer); |
| return lookups && verticalFeatureTable->getGlyphSubstitutions(lookups, map, buffer); |
| } |
| }; |
| |
| #pragma pack() |
| |
| } // namespace OpenType |
| |
| static bool loadHmtxTable(const FontPlatformData& platformData, Vector<uint16_t>& advanceWidths) |
| { |
| RefPtr<SharedBuffer> buffer = platformData.openTypeTable(OpenType::HheaTag); |
| const OpenType::HheaTable* hhea = OpenType::validateTable<OpenType::HheaTable>(buffer); |
| if (!hhea) |
| return false; |
| uint16_t countHmtxEntries = hhea->numberOfHMetrics; |
| if (!countHmtxEntries) { |
| LOG_ERROR("Invalid numberOfHMetrics"); |
| return false; |
| } |
| |
| buffer = platformData.openTypeTable(OpenType::HmtxTag); |
| const OpenType::HmtxTable* hmtx = OpenType::validateTable<OpenType::HmtxTable>(buffer, countHmtxEntries); |
| if (!hmtx) { |
| LOG_ERROR("hhea exists but hmtx does not (or broken)"); |
| return false; |
| } |
| |
| advanceWidths.resize(countHmtxEntries); |
| for (uint16_t i = 0; i < countHmtxEntries; ++i) |
| advanceWidths[i] = hmtx->entries[i].advanceWidth; |
| return true; |
| } |
| |
| RefPtr<OpenTypeVerticalData> OpenTypeVerticalData::create(const FontPlatformData& platformData) |
| { |
| // Load hhea and hmtx to get x-component of vertical origins. If these tables are missing, it's not an OpenType font. |
| Vector<uint16_t> advanceWidths; |
| if (!loadHmtxTable(platformData, advanceWidths)) |
| return nullptr; |
| |
| return adoptRef(new OpenTypeVerticalData(platformData, WTFMove(advanceWidths))); |
| } |
| |
| OpenTypeVerticalData::OpenTypeVerticalData(const FontPlatformData& platformData, Vector<uint16_t>&& advanceWidths) |
| : m_advanceWidths(WTFMove(advanceWidths)) |
| { |
| loadMetrics(platformData); |
| loadVerticalGlyphSubstitutions(platformData); |
| } |
| |
| void OpenTypeVerticalData::loadMetrics(const FontPlatformData& platformData) |
| { |
| // Load vhea first. This table is required for fonts that support vertical flow. |
| RefPtr<SharedBuffer> buffer = platformData.openTypeTable(OpenType::VheaTag); |
| const OpenType::VheaTable* vhea = OpenType::validateTable<OpenType::VheaTable>(buffer); |
| if (!vhea) |
| return; |
| uint16_t countVmtxEntries = vhea->numOfLongVerMetrics; |
| if (!countVmtxEntries) { |
| LOG_ERROR("Invalid numOfLongVerMetrics"); |
| return; |
| } |
| |
| // Load VORG. This table is optional. |
| buffer = platformData.openTypeTable(OpenType::VORGTag); |
| const OpenType::VORGTable* vorg = OpenType::validateTable<OpenType::VORGTable>(buffer); |
| if (vorg && buffer->size() >= vorg->requiredSize()) { |
| m_defaultVertOriginY = vorg->defaultVertOriginY; |
| uint16_t countVertOriginYMetrics = vorg->numVertOriginYMetrics; |
| if (!countVertOriginYMetrics) { |
| // Add one entry so that hasVORG() becomes true |
| m_vertOriginY.set(0, m_defaultVertOriginY); |
| } else { |
| for (uint16_t i = 0; i < countVertOriginYMetrics; ++i) { |
| const OpenType::VORGTable::VertOriginYMetrics& metrics = vorg->vertOriginYMetrics[i]; |
| m_vertOriginY.set(metrics.glyphIndex, metrics.vertOriginY); |
| } |
| } |
| } |
| |
| // Load vmtx then. This table is required for fonts that support vertical flow. |
| buffer = platformData.openTypeTable(OpenType::VmtxTag); |
| const OpenType::VmtxTable* vmtx = OpenType::validateTable<OpenType::VmtxTable>(buffer, countVmtxEntries); |
| if (!vmtx) { |
| LOG_ERROR("vhea exists but vmtx does not (or broken)"); |
| return; |
| } |
| m_advanceHeights.resize(countVmtxEntries); |
| for (uint16_t i = 0; i < countVmtxEntries; ++i) |
| m_advanceHeights[i] = vmtx->entries[i].advanceHeight; |
| |
| // VORG is preferred way to calculate vertical origin than vmtx, |
| // so load topSideBearing from vmtx only if VORG is missing. |
| if (hasVORG()) |
| return; |
| |
| size_t sizeExtra = buffer->size() - sizeof(OpenType::VmtxTable::Entry) * countVmtxEntries; |
| if (sizeExtra % sizeof(OpenType::Int16)) { |
| LOG_ERROR("vmtx has incorrect tsb count"); |
| return; |
| } |
| size_t countTopSideBearings = countVmtxEntries + sizeExtra / sizeof(OpenType::Int16); |
| m_topSideBearings.resize(countTopSideBearings); |
| size_t i; |
| for (i = 0; i < countVmtxEntries; ++i) |
| m_topSideBearings[i] = vmtx->entries[i].topSideBearing; |
| if (i < countTopSideBearings) { |
| const OpenType::Int16* pTopSideBearingsExtra = reinterpret_cast<const OpenType::Int16*>(&vmtx->entries[countVmtxEntries]); |
| for (; i < countTopSideBearings; ++i, ++pTopSideBearingsExtra) |
| m_topSideBearings[i] = *pTopSideBearingsExtra; |
| } |
| } |
| |
| void OpenTypeVerticalData::loadVerticalGlyphSubstitutions(const FontPlatformData& platformData) |
| { |
| RefPtr<SharedBuffer> buffer = platformData.openTypeTable(OpenType::GSUBTag); |
| const OpenType::GSUBTable* gsub = OpenType::validateTable<OpenType::GSUBTable>(buffer); |
| if (gsub) |
| gsub->getVerticalGlyphSubstitutions(&m_verticalGlyphMap, *buffer.get()); |
| } |
| |
| float OpenTypeVerticalData::advanceHeight(const Font* font, Glyph glyph) const |
| { |
| size_t countHeights = m_advanceHeights.size(); |
| if (countHeights) { |
| uint16_t advanceFUnit = m_advanceHeights[glyph < countHeights ? glyph : countHeights - 1]; |
| float advance = advanceFUnit * font->sizePerUnit(); |
| return advance; |
| } |
| |
| // No vertical info in the font file; use height as advance. |
| return font->fontMetrics().height(); |
| } |
| |
| void OpenTypeVerticalData::getVerticalTranslationsForGlyphs(const Font* font, const Glyph* glyphs, size_t count, float* outXYArray) const |
| { |
| size_t countWidths = m_advanceWidths.size(); |
| ASSERT(countWidths > 0); |
| const FontMetrics& metrics = font->fontMetrics(); |
| float sizePerUnit = font->sizePerUnit(); |
| float ascent = metrics.ascent(); |
| bool useVORG = hasVORG(); |
| size_t countTopSideBearings = m_topSideBearings.size(); |
| float defaultVertOriginY = std::numeric_limits<float>::quiet_NaN(); |
| for (float* end = &(outXYArray[count * 2]); outXYArray != end; ++glyphs, outXYArray += 2) { |
| Glyph glyph = *glyphs; |
| uint16_t widthFUnit = m_advanceWidths[glyph < countWidths ? glyph : countWidths - 1]; |
| float width = widthFUnit * sizePerUnit; |
| outXYArray[0] = -width / 2; |
| |
| // For Y, try VORG first. |
| if (useVORG) { |
| int16_t vertOriginYFUnit = m_vertOriginY.get(glyph); |
| if (vertOriginYFUnit) { |
| outXYArray[1] = -vertOriginYFUnit * sizePerUnit; |
| continue; |
| } |
| if (std::isnan(defaultVertOriginY)) |
| defaultVertOriginY = -m_defaultVertOriginY * sizePerUnit; |
| outXYArray[1] = defaultVertOriginY; |
| continue; |
| } |
| |
| // If no VORG, try vmtx next. |
| if (countTopSideBearings) { |
| int16_t topSideBearingFUnit = m_topSideBearings[glyph < countTopSideBearings ? glyph : countTopSideBearings - 1]; |
| float topSideBearing = topSideBearingFUnit * sizePerUnit; |
| FloatRect bounds = font->boundsForGlyph(glyph); |
| outXYArray[1] = bounds.y() - topSideBearing; |
| continue; |
| } |
| |
| // No vertical info in the font file; use ascent as vertical origin. |
| outXYArray[1] = -ascent; |
| } |
| } |
| |
| void OpenTypeVerticalData::substituteWithVerticalGlyphs(const Font* font, GlyphPage* glyphPage) const |
| { |
| const HashMap<Glyph, Glyph>& map = m_verticalGlyphMap; |
| if (map.isEmpty()) |
| return; |
| |
| for (unsigned index = 0; index < GlyphPage::size; ++index) { |
| Glyph glyph = glyphPage->glyphForIndex(index); |
| if (glyph) { |
| ASSERT_UNUSED(font, &glyphPage->font() == font); |
| Glyph to = map.get(glyph); |
| if (to) |
| glyphPage->setGlyphForIndex(index, to); |
| } |
| } |
| } |
| |
| } // namespace WebCore |
| #endif // ENABLE(OPENTYPE_VERTICAL) |