bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
{
bool haveGlyphs = false;
Vector<CGGlyph, 512> glyphs(bufferLength);
if (!shouldUseCoreText(buffer, bufferLength, fontData)) {
WKGetGlyphsForCharacters(fontData->platformData().cgFont(), buffer, glyphs.data(), bufferLength);
for (unsigned i = 0; i < length; ++i) {
if (!glyphs[i])
setGlyphDataForIndex(offset + i, 0, 0);
else {
setGlyphDataForIndex(offset + i, glyphs[i], fontData);
haveGlyphs = true;
}
}
} else if (!fontData->platformData().isCompositeFontReference() && ((fontData->platformData().widthVariant() == RegularWidth) ? WKGetVerticalGlyphsForCharacters(fontData->platformData().ctFont(), buffer, glyphs.data(), bufferLength)
: CTFontGetGlyphsForCharacters(fontData->platformData().ctFont(), buffer, glyphs.data(), bufferLength))) {
// When buffer consists of surrogate pairs, WKGetVerticalGlyphsForCharacters and CTFontGetGlyphsForCharacters
// place the glyphs at indices corresponding to the first character of each pair.
unsigned glyphStep = bufferLength / length;
for (unsigned i = 0; i < length; ++i) {
if (!glyphs[i * glyphStep])
setGlyphDataForIndex(offset + i, 0, 0);
else {
setGlyphDataForIndex(offset + i, glyphs[i * glyphStep], fontData);
haveGlyphs = true;
}
}
} else {
// We ask CoreText for possible vertical variant glyphs
RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, buffer, bufferLength, kCFAllocatorNull));
RetainPtr<CFAttributedStringRef> attributedString(AdoptCF, CFAttributedStringCreate(kCFAllocatorDefault, string.get(), fontData->getCFStringAttributes(0, fontData->hasVerticalGlyphs() ? Vertical : Horizontal)));
RetainPtr<CTLineRef> line(AdoptCF, CTLineCreateWithAttributedString(attributedString.get()));
CFArrayRef runArray = CTLineGetGlyphRuns(line.get());
CFIndex runCount = CFArrayGetCount(runArray);
// Initialize glyph entries
for (unsigned index = 0; index < length; ++index)
setGlyphDataForIndex(offset + index, 0, 0);
Vector<CGGlyph, 512> glyphVector;
Vector<CFIndex, 512> indexVector;
bool done = false;
// For the CGFont comparison in the loop, use the CGFont that Core Text assigns to the CTFont. This may
// be non-CFEqual to fontData->platformData().cgFont().
RetainPtr<CGFontRef> cgFont(AdoptCF, CTFontCopyGraphicsFont(fontData->platformData().ctFont(), 0));
for (CFIndex r = 0; r < runCount && !done ; ++r) {
// CTLine could map characters over multiple fonts using its own font fallback list.
// We need to pick runs that use the exact font we need, i.e., fontData->platformData().ctFont().
CTRunRef ctRun = static_cast<CTRunRef>(CFArrayGetValueAtIndex(runArray, r));
ASSERT(CFGetTypeID(ctRun) == CTRunGetTypeID());
CFDictionaryRef attributes = CTRunGetAttributes(ctRun);
CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(attributes, kCTFontAttributeName));
RetainPtr<CGFontRef> runCGFont(AdoptCF, CTFontCopyGraphicsFont(runFont, 0));
// Use CGFont here as CFEqual for CTFont counts all attributes for font.
bool gotBaseFont = CFEqual(cgFont.get(), runCGFont.get());
if (gotBaseFont || fontData->platformData().isCompositeFontReference()) {
// This run uses the font we want. Extract glyphs.
CFIndex glyphCount = CTRunGetGlyphCount(ctRun);
const CGGlyph* glyphs = CTRunGetGlyphsPtr(ctRun);
if (!glyphs) {
glyphVector.resize(glyphCount);
CTRunGetGlyphs(ctRun, CFRangeMake(0, 0), glyphVector.data());
glyphs = glyphVector.data();
}
const CFIndex* stringIndices = CTRunGetStringIndicesPtr(ctRun);
if (!stringIndices) {
indexVector.resize(glyphCount);
CTRunGetStringIndices(ctRun, CFRangeMake(0, 0), indexVector.data());
stringIndices = indexVector.data();
}
if (gotBaseFont) {
for (CFIndex i = 0; i < glyphCount; ++i) {
if (stringIndices[i] >= static_cast<CFIndex>(length)) {
done = true;
break;
}
if (glyphs[i]) {
setGlyphDataForIndex(offset + stringIndices[i], glyphs[i], fontData);
haveGlyphs = true;
}
}
} else {
const SimpleFontData* runSimple = fontData->getCompositeFontReferenceFontData((NSFont *)runFont);
if (runSimple) {
for (CFIndex i = 0; i < glyphCount; ++i) {
if (stringIndices[i] >= static_cast<CFIndex>(length)) {
done = true;
break;
}
if (glyphs[i]) {
setGlyphDataForIndex(offset + stringIndices[i], glyphs[i], runSimple);
haveGlyphs = true;
}
}
}
}
}
}
}
return haveGlyphs;
}
bool GlyphPage::fill(unsigned offset, unsigned length, UChar* buffer, unsigned bufferLength, const SimpleFontData* fontData)
{
bool haveGlyphs = false;
#ifndef BUILDING_ON_TIGER
if (fontData->orientation() == Horizontal || fontData->isBrokenIdeographFont()) {
Vector<CGGlyph, 512> glyphs(bufferLength);
wkGetGlyphsForCharacters(fontData->platformData().cgFont(), buffer, glyphs.data(), bufferLength);
for (unsigned i = 0; i < length; ++i) {
if (!glyphs[i])
setGlyphDataForIndex(offset + i, 0, 0);
else {
setGlyphDataForIndex(offset + i, glyphs[i], fontData);
haveGlyphs = true;
}
}
} else {
// We ask CoreText for possible vertical variant glyphs
RetainPtr<CFStringRef> string(AdoptCF, CFStringCreateWithCharactersNoCopy(kCFAllocatorDefault, buffer, bufferLength, kCFAllocatorNull));
RetainPtr<CFAttributedStringRef> attributedString(AdoptCF, CFAttributedStringCreate(kCFAllocatorDefault, string.get(), fontData->getCFStringAttributes(0)));
RetainPtr<CTLineRef> line(AdoptCF, CTLineCreateWithAttributedString(attributedString.get()));
CFArrayRef runArray = CTLineGetGlyphRuns(line.get());
CFIndex runCount = CFArrayGetCount(runArray);
// Initialize glyph entries
for (unsigned index = 0; index < length; ++index)
setGlyphDataForIndex(offset + index, 0, 0);
Vector<CGGlyph, 512> glyphVector;
Vector<CFIndex, 512> indexVector;
bool done = false;
for (CFIndex r = 0; r < runCount && !done ; ++r) {
// CTLine could map characters over multiple fonts using its own font fallback list.
// We need to pick runs that use the exact font we need, i.e., fontData->platformData().ctFont().
CTRunRef ctRun = static_cast<CTRunRef>(CFArrayGetValueAtIndex(runArray, r));
ASSERT(CFGetTypeID(ctRun) == CTRunGetTypeID());
CFDictionaryRef attributes = CTRunGetAttributes(ctRun);
CTFontRef runFont = static_cast<CTFontRef>(CFDictionaryGetValue(attributes, kCTFontAttributeName));
RetainPtr<CGFontRef> runCGFont(AdoptCF, CTFontCopyGraphicsFont(runFont, 0));
// Use CGFont here as CFEqual for CTFont counts all attributes for font.
if (CFEqual(fontData->platformData().cgFont(), runCGFont.get())) {
// This run uses the font we want. Extract glyphs.
CFIndex glyphCount = CTRunGetGlyphCount(ctRun);
const CGGlyph* glyphs = CTRunGetGlyphsPtr(ctRun);
if (!glyphs) {
glyphVector.resize(glyphCount);
CTRunGetGlyphs(ctRun, CFRangeMake(0, 0), glyphVector.data());
glyphs = glyphVector.data();
}
const CFIndex* stringIndices = CTRunGetStringIndicesPtr(ctRun);
if (!stringIndices) {
indexVector.resize(glyphCount);
CTRunGetStringIndices(ctRun, CFRangeMake(0, 0), indexVector.data());
stringIndices = indexVector.data();
}
for (CFIndex i = 0; i < glyphCount; ++i) {
if (stringIndices[i] >= static_cast<CFIndex>(length)) {
done = true;
break;
}
if (glyphs[i]) {
setGlyphDataForIndex(offset + stringIndices[i], glyphs[i], fontData);
haveGlyphs = true;
}
}
}
}
}
#else
// Use an array of long so we get good enough alignment.
long glyphVector[(GLYPH_VECTOR_SIZE + sizeof(long) - 1) / sizeof(long)];
OSStatus status = wkInitializeGlyphVector(GlyphPage::size, &glyphVector);
if (status != noErr)
// This should never happen, perhaps indicates a bad font! If it does the
// font substitution code will find an alternate font.
return false;
wkConvertCharToGlyphs(fontData->m_styleGroup, buffer, bufferLength, &glyphVector);
unsigned numGlyphs = wkGetGlyphVectorNumGlyphs(&glyphVector);
if (numGlyphs != length) {
// This should never happen, perhaps indicates a bad font?
// If it does happen, the font substitution code will find an alternate font.
wkClearGlyphVector(&glyphVector);
return false;
}
ATSLayoutRecord* glyphRecord = (ATSLayoutRecord*)wkGetGlyphVectorFirstRecord(glyphVector);
for (unsigned i = 0; i < length; i++) {
Glyph glyph = glyphRecord->glyphID;
if (!glyph)
setGlyphDataForIndex(offset + i, 0, 0);
else {
setGlyphDataForIndex(offset + i, glyph, fontData);
haveGlyphs = true;
}
glyphRecord = (ATSLayoutRecord *)((char *)glyphRecord + wkGetGlyphVectorRecordSize(glyphVector));
}
wkClearGlyphVector(&glyphVector);
#endif
return haveGlyphs;
}