void Font::drawTextUsingSVGFont(GraphicsContext* context, const TextRun& run,
const FloatPoint& point, int from, int to) const
{
SVGFontElement* fontElement = 0;
SVGFontFaceElement* fontFaceElement = 0;
if (const SVGFontData* fontData = svgFontAndFontFaceElementForFontData(primaryFont(), fontFaceElement, fontElement)) {
if (!fontElement)
return;
SVGTextRunWalkerDrawTextData data;
FloatPoint currentPoint = point;
float scale = convertEmUnitToPixel(size(), fontFaceElement->unitsPerEm(), 1.0f);
SVGPaintServer* activePaintServer = run.activePaintServer();
// If renderObject is not set, we're dealing for HTML text rendered using SVG Fonts.
if (!run.referencingRenderObject()) {
ASSERT(!activePaintServer);
// TODO: We're only supporting simple filled HTML text so far.
SVGPaintServerSolid* solidPaintServer = SVGPaintServer::sharedSolidPaintServer();
solidPaintServer->setColor(context->fillColor());
activePaintServer = solidPaintServer;
}
ASSERT(activePaintServer);
int charsConsumed;
String glyphName;
bool isVerticalText = false;
float xStartOffset = floatWidthOfSubStringUsingSVGFont(this, run, 0, run.rtl() ? to : 0, run.rtl() ? run.length() : from, charsConsumed, glyphName);
FloatPoint glyphOrigin;
String language;
// TODO: language matching & svg glyphs should be possible for HTML text, too.
if (run.referencingRenderObject()) {
isVerticalText = isVerticalWritingMode(run.referencingRenderObject()->style()->svgStyle());
if (SVGElement* element = static_cast<SVGElement*>(run.referencingRenderObject()->element()))
language = element->getAttribute(XMLNames::langAttr);
}
if (!isVerticalText) {
glyphOrigin.setX(fontData->horizontalOriginX() * scale);
glyphOrigin.setY(fontData->horizontalOriginY() * scale);
}
data.extraCharsAvailable = 0;
data.charsConsumed = 0;
SVGTextRunWalker<SVGTextRunWalkerDrawTextData> runWalker(fontData, fontElement, data, drawTextUsingSVGFontCallback, drawTextMissingGlyphCallback);
runWalker.walk(run, isVerticalText, language, from, to);
SVGPaintTargetType targetType = context->textDrawingMode() == cTextStroke ? ApplyToStrokeTargetType : ApplyToFillTargetType;
unsigned numGlyphs = data.glyphIdentifiers.size();
unsigned fallbackCharacterIndex = 0;
for (unsigned i = 0; i < numGlyphs; ++i) {
const SVGGlyphIdentifier& identifier = data.glyphIdentifiers[run.rtl() ? numGlyphs - i - 1 : i];
if (identifier.isValid) {
// FIXME: Support arbitary SVG content as glyph (currently limited to <glyph d="..."> situations).
if (!identifier.pathData.isEmpty()) {
context->save();
if (isVerticalText) {
glyphOrigin.setX(identifier.verticalOriginX * scale);
glyphOrigin.setY(identifier.verticalOriginY * scale);
}
context->translate(xStartOffset + currentPoint.x() + glyphOrigin.x(), currentPoint.y() + glyphOrigin.y());
context->scale(FloatSize(scale, -scale));
context->beginPath();
context->addPath(identifier.pathData);
if (activePaintServer->setup(context, run.referencingRenderObject(), targetType)) {
// Spec: Any properties specified on a text elements which represents a length, such as the
// 'stroke-width' property, might produce surprising results since the length value will be
// processed in the coordinate system of the glyph. (TODO: What other lengths? miter-limit? dash-offset?)
if (targetType == ApplyToStrokeTargetType && scale != 0.0f)
context->setStrokeThickness(context->strokeThickness() / scale);
activePaintServer->renderPath(context, run.referencingRenderObject(), targetType);
activePaintServer->teardown(context, run.referencingRenderObject(), targetType);
}
context->restore();
}
if (isVerticalText)
currentPoint.move(0.0f, identifier.verticalAdvanceY * scale);
else
currentPoint.move(identifier.horizontalAdvanceX * scale, 0.0f);
} else {
// Handle system font fallback
FontDescription fontDescription(context->font().fontDescription());
fontDescription.setFamily(FontFamily());
Font font(fontDescription, 0, 0); // spacing handled by SVG text code.
font.update(context->font().fontSelector());
TextRun fallbackCharacterRun(run);
fallbackCharacterRun.setText(&data.fallbackCharacters[run.rtl() ? data.fallbackCharacters.size() - fallbackCharacterIndex - 1 : fallbackCharacterIndex], 1);
font.drawText(context, fallbackCharacterRun, currentPoint);
if (isVerticalText)
currentPoint.move(0.0f, font.floatWidth(fallbackCharacterRun));
else
currentPoint.move(font.floatWidth(fallbackCharacterRun), 0.0f);
fallbackCharacterIndex++;
}
}
}
}
void paintSVGInlineFlow(InlineFlowBox* flow, RenderObject* object, RenderObject::PaintInfo& paintInfo, int tx, int ty)
{
if (paintInfo.context->paintingDisabled())
return;
paintInfo.context->save();
paintInfo.context->concatCTM(object->localTransform());
FloatRect boundingBox(tx + flow->xPos(), ty + flow->yPos(), flow->width(), flow->height());
SVGElement* svgElement = static_cast<SVGElement*>(object->element());
ASSERT(svgElement && svgElement->document() && svgElement->isStyled());
SVGStyledElement* styledElement = static_cast<SVGStyledElement*>(svgElement);
const SVGRenderStyle* svgStyle = object->style()->svgStyle();
AtomicString filterId(SVGURIReference::getTarget(svgStyle->filter()));
AtomicString clipperId(SVGURIReference::getTarget(svgStyle->clipPath()));
AtomicString maskerId(SVGURIReference::getTarget(svgStyle->maskElement()));
#if ENABLE(SVG_EXPERIMENTAL_FEATURES)
SVGResourceFilter* filter = getFilterById(object->document(), filterId);
#endif
SVGResourceClipper* clipper = getClipperById(object->document(), clipperId);
SVGResourceMasker* masker = getMaskerById(object->document(), maskerId);
#if ENABLE(SVG_EXPERIMENTAL_FEATURES)
if (filter)
filter->prepareFilter(paintInfo.context, boundingBox);
else if (!filterId.isEmpty())
svgElement->document()->accessSVGExtensions()->addPendingResource(filterId, styledElement);
#endif
if (clipper) {
clipper->addClient(styledElement);
clipper->applyClip(paintInfo.context, boundingBox);
} else if (!clipperId.isEmpty())
svgElement->document()->accessSVGExtensions()->addPendingResource(clipperId, styledElement);
if (masker) {
masker->addClient(styledElement);
masker->applyMask(paintInfo.context, boundingBox);
} else if (!maskerId.isEmpty())
svgElement->document()->accessSVGExtensions()->addPendingResource(maskerId, styledElement);
RenderObject::PaintInfo pi(paintInfo);
if (!flow->isRootInlineBox())
pi.rect = (object->localTransform()).inverse().mapRect(pi.rect);
float opacity = object->style()->opacity();
if (opacity < 1.0f) {
paintInfo.context->clip(enclosingIntRect(boundingBox));
paintInfo.context->beginTransparencyLayer(opacity);
}
SVGPaintServer* fillPaintServer = KSVGPainterFactory::fillPaintServer(object->style(), object);
if (fillPaintServer) {
if (fillPaintServer->setup(pi.context, object, ApplyToFillTargetType, true)) {
flow->InlineFlowBox::paint(pi, tx, ty);
fillPaintServer->teardown(pi.context, object, ApplyToFillTargetType, true);
}
}
SVGPaintServer* strokePaintServer = KSVGPainterFactory::strokePaintServer(object->style(), object);
if (strokePaintServer) {
if (strokePaintServer->setup(pi.context, object, ApplyToStrokeTargetType, true)) {
flow->InlineFlowBox::paint(pi, tx, ty);
strokePaintServer->teardown(pi.context, object, ApplyToStrokeTargetType, true);
}
}
#if ENABLE(SVG_EXPERIMENTAL_FEATURES)
if (filter)
filter->applyFilter(paintInfo.context, boundingBox);
#endif
if (opacity < 1.0f)
paintInfo.context->endTransparencyLayer();
paintInfo.context->restore();
}