float SVGFontData::widthForSVGGlyph(Glyph glyph, float fontSize) const
{
SVGFontFaceElement* svgFontFaceElement = this->svgFontFaceElement();
ASSERT(svgFontFaceElement);
SVGFontElement* associatedFontElement = svgFontFaceElement->associatedFontElement();
ASSERT(associatedFontElement);
SVGGlyph svgGlyph = associatedFontElement->svgGlyphForGlyph(glyph);
SVGGlyphElement::inheritUnspecifiedAttributes(svgGlyph, this);
return svgGlyph.horizontalAdvanceX * scaleEmToUnits(fontSize, svgFontFaceElement->unitsPerEm());
}
bool SVGTextRunRenderingContext::applySVGKerning(const SimpleFontData* fontData, WidthIterator& iterator, GlyphBuffer* glyphBuffer, int from) const
{
ASSERT(glyphBuffer);
ASSERT(glyphBuffer->size() > 1);
SVGFontElement* fontElement = 0;
SVGFontFaceElement* fontFaceElement = 0;
svgFontAndFontFaceElementForFontData(fontData, fontFaceElement, fontElement);
if (!fontElement || !fontFaceElement)
return false;
if (fontElement->horizontalKerningMapIsEmpty())
return true;
float scale = scaleEmToUnits(fontData->platformData().size(), fontFaceElement->unitsPerEm());
String lastGlyphName;
String lastUnicodeString;
int characterOffset = iterator.m_currentCharacter;
String text = iterator.run().string();
const int glyphCount = glyphBuffer->size() - from;
GlyphBufferAdvance* advances = glyphBuffer->advances(from);
for (int i = 0; i < glyphCount; ++i) {
Glyph glyph = glyphBuffer->glyphAt(from + i);
if (!glyph)
continue;
float kerning = 0;
SVGGlyph svgGlyph = fontElement->svgGlyphForGlyph(glyph);
String unicodeString = text.substring(characterOffset, svgGlyph.unicodeStringLength);
if (i >= 1) {
// FIXME: Support vertical text.
kerning = fontElement->horizontalKerningForPairOfStringsAndGlyphs(lastUnicodeString, lastGlyphName, unicodeString, svgGlyph.glyphName);
advances[i - 1].setWidth(advances[i - 1].width() - kerning * scale);
}
lastGlyphName = svgGlyph.glyphName;
lastUnicodeString = unicodeString;
characterOffset += svgGlyph.unicodeStringLength;
}
return true;
}
void SVGTextRunRenderingContext::drawSVGGlyphs(GraphicsContext* context, const TextRun& run, const SimpleFontData* fontData, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point) const
{
SVGFontElement* fontElement = 0;
SVGFontFaceElement* fontFaceElement = 0;
const SVGFontData* svgFontData = svgFontAndFontFaceElementForFontData(fontData, fontFaceElement, fontElement);
if (!fontElement || !fontFaceElement)
return;
// We can only paint SVGFonts if a context is available.
RenderSVGResource* activePaintingResource = activePaintingResourceFromRun(run);
RenderObject* renderObject = renderObjectFromRun(run);
RenderObject* parentRenderObject = firstParentRendererForNonTextNode(renderObject);
RenderStyle* parentRenderObjectStyle = 0;
ASSERT(renderObject);
if (!activePaintingResource) {
// TODO: We're only supporting simple filled HTML text so far.
RenderSVGResourceSolidColor* solidPaintingResource = RenderSVGResource::sharedSolidPaintingResource();
solidPaintingResource->setColor(context->fillColor());
activePaintingResource = solidPaintingResource;
}
bool isVerticalText = false;
if (parentRenderObject) {
parentRenderObjectStyle = parentRenderObject->style();
ASSERT(parentRenderObjectStyle);
isVerticalText = parentRenderObjectStyle->svgStyle()->isVerticalWritingMode();
}
float scale = scaleEmToUnits(fontData->platformData().size(), fontFaceElement->unitsPerEm());
ASSERT(activePaintingResource);
FloatPoint glyphOrigin;
glyphOrigin.setX(svgFontData->horizontalOriginX() * scale);
glyphOrigin.setY(svgFontData->horizontalOriginY() * scale);
FloatPoint currentPoint = point;
RenderSVGResourceMode resourceMode = context->textDrawingMode() == TextModeStroke ? ApplyToStrokeMode : ApplyToFillMode;
for (int i = 0; i < numGlyphs; ++i) {
Glyph glyph = glyphBuffer.glyphAt(from + i);
if (!glyph)
continue;
float advance = glyphBuffer.advanceAt(from + i);
SVGGlyph svgGlyph = fontElement->svgGlyphForGlyph(glyph);
ASSERT(!svgGlyph.isPartOfLigature);
ASSERT(svgGlyph.tableEntry == glyph);
SVGGlyphElement::inheritUnspecifiedAttributes(svgGlyph, svgFontData);
// FIXME: Support arbitary SVG content as glyph (currently limited to <glyph d="..."> situations).
if (svgGlyph.pathData.isEmpty()) {
if (isVerticalText)
currentPoint.move(0, advance);
else
currentPoint.move(advance, 0);
continue;
}
context->save();
if (isVerticalText) {
glyphOrigin.setX(svgGlyph.verticalOriginX * scale);
glyphOrigin.setY(svgGlyph.verticalOriginY * scale);
}
AffineTransform glyphPathTransform;
glyphPathTransform.translate(currentPoint.x() + glyphOrigin.x(), currentPoint.y() + glyphOrigin.y());
glyphPathTransform.scale(scale, -scale);
Path glyphPath = svgGlyph.pathData;
glyphPath.transform(glyphPathTransform);
if (activePaintingResource->applyResource(parentRenderObject, parentRenderObjectStyle, context, resourceMode)) {
if (renderObject && renderObject->isSVGInlineText()) {
const RenderSVGInlineText* textRenderer = toRenderSVGInlineText(renderObject);
context->setStrokeThickness(context->strokeThickness() * textRenderer->scalingFactor());
}
activePaintingResource->postApplyResource(parentRenderObject, context, resourceMode, &glyphPath, 0);
}
context->restore();
if (isVerticalText)
currentPoint.move(0, advance);
else
currentPoint.move(advance, 0);
}
}
void SVGTextRunRenderingContext::drawSVGGlyphs(GraphicsContext* context, const TextRun& run, const SimpleFontData* fontData, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point) const
{
SVGFontElement* fontElement = 0;
SVGFontFaceElement* fontFaceElement = 0;
const SVGFontData* svgFontData = svgFontAndFontFaceElementForFontData(fontData, fontFaceElement, fontElement);
if (!fontElement || !fontFaceElement)
return;
// We can only paint SVGFonts if a context is available.
RenderObject* renderObject = renderObjectFromRun(run);
ASSERT(renderObject);
bool isVerticalText = false;
if (RenderObject* parentRenderObject = firstParentRendererForNonTextNode(renderObject)) {
RenderStyle* parentRenderObjectStyle = parentRenderObject->style();
ASSERT(parentRenderObjectStyle);
isVerticalText = parentRenderObjectStyle->svgStyle().isVerticalWritingMode();
}
float scale = scaleEmToUnits(fontData->platformData().size(), fontFaceElement->unitsPerEm());
FloatPoint glyphOrigin;
glyphOrigin.setX(svgFontData->horizontalOriginX() * scale);
glyphOrigin.setY(svgFontData->horizontalOriginY() * scale);
unsigned short resourceMode = context->textDrawingMode() == TextModeStroke ? ApplyToStrokeMode : ApplyToFillMode;
FloatPoint currentPoint = point;
for (int i = 0; i < numGlyphs; ++i) {
Glyph glyph = glyphBuffer.glyphAt(from + i);
if (!glyph)
continue;
float advance = glyphBuffer.advanceAt(from + i);
SVGGlyph svgGlyph = fontElement->svgGlyphForGlyph(glyph);
ASSERT(!svgGlyph.isPartOfLigature);
ASSERT(svgGlyph.tableEntry == glyph);
SVGGlyphElement::inheritUnspecifiedAttributes(svgGlyph, svgFontData);
// FIXME: Support arbitary SVG content as glyph (currently limited to <glyph d="..."> situations).
if (svgGlyph.pathData.isEmpty()) {
if (isVerticalText)
currentPoint.move(0, advance);
else
currentPoint.move(advance, 0);
continue;
}
if (isVerticalText) {
glyphOrigin.setX(svgGlyph.verticalOriginX * scale);
glyphOrigin.setY(svgGlyph.verticalOriginY * scale);
}
AffineTransform glyphPathTransform;
glyphPathTransform.translate(currentPoint.x() + glyphOrigin.x(), currentPoint.y() + glyphOrigin.y());
glyphPathTransform.scale(scale, -scale);
Path glyphPath = svgGlyph.pathData;
glyphPath.transform(glyphPathTransform);
SVGRenderSupport::fillOrStrokePath(context, resourceMode, glyphPath);
if (isVerticalText)
currentPoint.move(0, advance);
else
currentPoint.move(advance, 0);
}
}