unsigned SimpleShaper::advanceInternal(TextIterator& textIterator, GlyphBuffer* glyphBuffer)
{
bool hasExtraSpacing = (m_font->fontDescription().letterSpacing() || m_font->fontDescription().wordSpacing() || m_expansion)
&& !m_run.spacingDisabled();
const SimpleFontData* primaryFont = m_font->primaryFont();
const SimpleFontData* lastFontData = primaryFont;
bool normalizeSpace = m_run.normalizeSpace();
CharacterData charData;
while (textIterator.consume(charData.character, charData.clusterLength)) {
charData.characterOffset = textIterator.currentCharacter();
GlyphData glyphData = glyphDataForCharacter(charData, normalizeSpace);
// Some fonts do not have a glyph for zero-width-space,
// in that case use the space character and override the width.
float width;
if (!glyphData.glyph && Character::treatAsZeroWidthSpaceInComplexScript(charData.character)) {
charData.character = space;
glyphData = glyphDataForCharacter(charData);
width = 0;
} else {
width = characterWidth(charData.character, glyphData);
}
Glyph glyph = glyphData.glyph;
const SimpleFontData* fontData = glyphData.fontData;
ASSERT(fontData);
if (m_fallbackFonts && lastFontData != fontData && width) {
lastFontData = fontData;
cacheFallbackFont(fontData, primaryFont);
}
if (hasExtraSpacing)
width = adjustSpacing(width, charData, *fontData, glyphBuffer);
if (m_bounds)
updateGlyphBounds(glyphData, width, !charData.characterOffset);
if (m_forTextEmphasis && !Character::canReceiveTextEmphasis(charData.character))
glyph = 0;
// Advance past the character we just dealt with.
textIterator.advance(charData.clusterLength);
m_runWidthSoFar += width;
if (glyphBuffer)
glyphBuffer->add(glyph, fontData, width);
}
unsigned consumedCharacters = textIterator.currentCharacter() - m_currentCharacter;
m_currentCharacter = textIterator.currentCharacter();
return consumedCharacters;
}
unsigned SimpleShaper::advanceInternal(TextIterator& textIterator, GlyphBuffer* glyphBuffer)
{
bool hasExtraSpacing = (m_font->getFontDescription().letterSpacing() || m_font->getFontDescription().wordSpacing() || m_expansion)
&& !m_textRun.spacingDisabled();
const SimpleFontData* lastFontData = m_font->primaryFont();
bool normalizeSpace = m_textRun.normalizeSpace();
const float initialRunWidth = m_runWidthSoFar;
CharacterData charData;
while (textIterator.consume(charData.character)) {
charData.characterOffset = textIterator.offset();
charData.clusterLength = textIterator.glyphLength();
GlyphData glyphData = glyphDataForCharacter(charData, normalizeSpace);
// Some fonts do not have a glyph for zero-width-space,
// in that case use the space character and override the width.
float width;
bool spaceUsedAsZeroWidthSpace = false;
if (!glyphData.glyph && Character::treatAsZeroWidthSpace(charData.character)) {
charData.character = spaceCharacter;
glyphData = glyphDataForCharacter(charData);
width = 0;
spaceUsedAsZeroWidthSpace = true;
} else {
width = characterWidth(charData.character, glyphData);
}
Glyph glyph = glyphData.glyph;
const SimpleFontData* fontData = glyphData.fontData;
ASSERT(fontData);
if (m_fallbackFonts && lastFontData != fontData && width) {
lastFontData = fontData;
trackNonPrimaryFallbackFont(fontData);
}
if (hasExtraSpacing && !spaceUsedAsZeroWidthSpace)
width = adjustSpacing(width, charData);
if (m_glyphBoundingBox) {
ASSERT(glyphData.fontData);
FloatRect glyphBounds = glyphData.fontData->boundsForGlyph(glyphData.glyph);
// We are handling simple text run here, so Y-Offset will be zero.
// FIXME: Computing bounds relative to the initial advance seems odd. Are we adjusting
// these someplace else? If not, we'll end up with different bounds depending on how
// we segment our advance() calls.
glyphBounds.move(m_runWidthSoFar - initialRunWidth, 0);
m_glyphBoundingBox->unite(glyphBounds);
}
if (glyphBuffer) {
if (!forTextEmphasis()) {
glyphBuffer->add(glyph, fontData, m_runWidthSoFar);
} else if (Character::canReceiveTextEmphasis(charData.character)) {
addEmphasisMark(glyphBuffer, m_runWidthSoFar + width / 2);
}
}
// Advance past the character we just dealt with.
textIterator.advance();
m_runWidthSoFar += width;
}
unsigned consumedCharacters = textIterator.offset() - m_currentCharacter;
m_currentCharacter = textIterator.offset();
return consumedCharacters;
}
