CairoGlyphToPathTranslator(const TextRun& textRun, const GlyphBuffer& glyphBuffer, const FloatPoint& textOrigin)
: m_index(0)
, m_textRun(textRun)
, m_glyphBuffer(glyphBuffer)
, m_fontData(glyphBuffer.fontAt(m_index))
, m_translation(AffineTransform().translate(textOrigin.x(), textOrigin.y()))
{
}
DashArray FontCascade::dashesForIntersectionsWithRect(const TextRun& run, const FloatPoint& textOrigin, const FloatRect& lineExtents) const
{
if (isLoadingCustomFonts())
return DashArray();
GlyphBuffer glyphBuffer;
glyphBuffer.saveOffsetsInString();
float deltaX;
if (codePath(run) != FontCascade::Complex)
deltaX = getGlyphsAndAdvancesForSimpleText(run, 0, run.length(), glyphBuffer);
else
deltaX = getGlyphsAndAdvancesForComplexText(run, 0, run.length(), glyphBuffer);
if (!glyphBuffer.size())
return DashArray();
// FIXME: Handle SVG + non-SVG interleaved runs. https://bugs.webkit.org/show_bug.cgi?id=133778
FloatPoint origin = FloatPoint(textOrigin.x() + deltaX, textOrigin.y());
std::unique_ptr<GlyphToPathTranslator> translator = std::make_unique<CairoGlyphToPathTranslator>(run, glyphBuffer, origin);
DashArray result;
for (int index = 0; translator->containsMorePaths(); ++index, translator->advance()) {
float centerOfLine = lineExtents.y() + (lineExtents.height() / 2);
GlyphIterationState info = GlyphIterationState(FloatPoint(), FloatPoint(), centerOfLine, lineExtents.x() + lineExtents.width(), lineExtents.x());
const Font* localFontData = glyphBuffer.fontAt(index);
if (!localFontData) {
// The advances will get all messed up if we do anything other than bail here.
result.clear();
break;
}
switch (translator->underlineType()) {
case GlyphToPathTranslator::GlyphUnderlineType::SkipDescenders: {
Path path = translator->path();
path.apply([&info](const PathElement& pathElement) {
findPathIntersections(info, pathElement);
});
if (info.minX < info.maxX) {
result.append(info.minX - lineExtents.x());
result.append(info.maxX - lineExtents.x());
}
break;
}
case GlyphToPathTranslator::GlyphUnderlineType::SkipGlyph: {
std::pair<float, float> extents = translator->extents();
result.append(extents.first - lineExtents.x());
result.append(extents.second - lineExtents.x());
break;
}
case GlyphToPathTranslator::GlyphUnderlineType::DrawOverGlyph:
// Nothing to do
break;
}
}
return result;
}
