void RenderNamedFlowFragment::computeChildrenStyleInRegion(RenderElement& renderer)
{
for (auto& child : childrenOfType<RenderObject>(renderer)) {
auto it = m_renderObjectRegionStyle.find(&child);
RefPtr<RenderStyle> childStyleInRegion;
bool objectRegionStyleCached = false;
if (it != m_renderObjectRegionStyle.end()) {
childStyleInRegion = it->value.style;
objectRegionStyleCached = true;
} else {
if (child.isAnonymous() || child.isInFlowRenderFlowThread())
childStyleInRegion = RenderStyle::createAnonymousStyleWithDisplay(&renderer.style(), child.style().display());
else if (child.isText())
childStyleInRegion = RenderStyle::clone(&renderer.style());
else
childStyleInRegion = computeStyleInRegion(toRenderElement(child), renderer.style());
}
setObjectStyleInRegion(&child, childStyleInRegion, objectRegionStyleCached);
if (child.isRenderElement())
computeChildrenStyleInRegion(toRenderElement(child));
}
}
void InlineBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit /* lineTop */, LayoutUnit /*lineBottom*/)
{
RenderElement& renderer = toRenderElement(this->renderer());
if (!paintInfo.shouldPaintWithinRoot(renderer) || (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection))
return;
LayoutPoint childPoint = paintOffset;
if (parent()->renderer().style()->isFlippedBlocksWritingMode() && renderer.isBox()) // Faster than calling containingBlock().
childPoint = m_renderer.containingBlock()->flipForWritingModeForChild(&toRenderBox(renderer), childPoint);
// Paint all phases of replaced elements atomically, as though the replaced element established its
// own stacking context. (See Appendix E.2, section 6.4 on inline block/table elements in the CSS2.1
// specification.)
bool preservePhase = paintInfo.phase == PaintPhaseSelection || paintInfo.phase == PaintPhaseTextClip;
PaintInfo info(paintInfo);
info.phase = preservePhase ? paintInfo.phase : PaintPhaseBlockBackground;
renderer.paint(info, childPoint);
if (!preservePhase) {
info.phase = PaintPhaseChildBlockBackgrounds;
renderer.paint(info, childPoint);
info.phase = PaintPhaseFloat;
renderer.paint(info, childPoint);
info.phase = PaintPhaseForeground;
renderer.paint(info, childPoint);
info.phase = PaintPhaseOutline;
renderer.paint(info, childPoint);
}
}
void RenderNamedFlowFragment::restoreRegionObjectsOriginalStyle()
{
if (!hasCustomRegionStyle())
return;
RenderObjectRegionStyleMap temp;
for (auto& objectPair : m_renderObjectRegionStyle) {
RenderObject* object = const_cast<RenderObject*>(objectPair.key);
RefPtr<RenderStyle> objectRegionStyle = &object->style();
RefPtr<RenderStyle> objectOriginalStyle = objectPair.value.style;
if (object->isRenderElement())
toRenderElement(object)->setStyleInternal(*objectOriginalStyle);
bool shouldCacheRegionStyle = objectPair.value.cached;
if (!shouldCacheRegionStyle) {
// Check whether we should cache the computed style in region.
unsigned changedContextSensitiveProperties = ContextSensitivePropertyNone;
StyleDifference styleDiff = objectOriginalStyle->diff(objectRegionStyle.get(), changedContextSensitiveProperties);
if (styleDiff < StyleDifferenceLayoutPositionedMovementOnly)
shouldCacheRegionStyle = true;
}
if (shouldCacheRegionStyle) {
ObjectRegionStyleInfo styleInfo;
styleInfo.style = objectRegionStyle;
styleInfo.cached = true;
temp.set(object, styleInfo);
}
}
m_renderObjectRegionStyle.swap(temp);
}
static CounterNode* makeCounterNode(RenderObject* object, const AtomicString& identifier, bool alwaysCreateCounter)
{
ASSERT(object);
// Real text nodes don't have their own style so they can't have counters.
// We can't even look at their styles or we'll see extra resets and increments!
if (object->isText())
return nullptr;
RenderElement* element = toRenderElement(object);
if (element->hasCounterNodeMap()) {
if (CounterMap* nodeMap = counterMaps().get(element)) {
if (CounterNode* node = nodeMap->get(identifier))
return node;
}
}
bool isReset = false;
int value = 0;
if (!planCounter(element, identifier, isReset, value) && !alwaysCreateCounter)
return nullptr;
RefPtr<CounterNode> newParent = 0;
RefPtr<CounterNode> newPreviousSibling = 0;
RefPtr<CounterNode> newNode = CounterNode::create(element, isReset, value);
if (findPlaceForCounter(element, identifier, isReset, newParent, newPreviousSibling))
newParent->insertAfter(newNode.get(), newPreviousSibling.get(), identifier);
CounterMap* nodeMap;
if (element->hasCounterNodeMap())
nodeMap = counterMaps().get(element);
else {
nodeMap = new CounterMap;
counterMaps().set(element, adoptPtr(nodeMap));
element->setHasCounterNodeMap(true);
}
nodeMap->set(identifier, newNode);
if (newNode->parent())
return newNode.get();
// Checking if some nodes that were previously counter tree root nodes
// should become children of this node now.
CounterMaps& maps = counterMaps();
Element* stayWithin = parentOrPseudoHostElement(element);
bool skipDescendants;
for (RenderElement* currentRenderer = nextInPreOrder(element, stayWithin); currentRenderer; currentRenderer = nextInPreOrder(currentRenderer, stayWithin, skipDescendants)) {
skipDescendants = false;
if (!currentRenderer->hasCounterNodeMap())
continue;
CounterNode* currentCounter = maps.get(currentRenderer)->get(identifier);
if (!currentCounter)
continue;
skipDescendants = true;
if (currentCounter->parent())
continue;
if (stayWithin == parentOrPseudoHostElement(currentRenderer) && currentCounter->hasResetType())
break;
newNode->insertAfter(currentCounter, newNode->lastChild(), identifier);
}
return newNode.get();
}
static inline bool findPreviousAndNextAttributes(RenderElement* start, RenderSVGInlineText* locateElement, bool& stopAfterNext, SVGTextLayoutAttributes*& previous, SVGTextLayoutAttributes*& next)
{
ASSERT(start);
ASSERT(locateElement);
// FIXME: Make this iterative.
for (RenderObject* child = start->firstChild(); child; child = child->nextSibling()) {
if (child->isSVGInlineText()) {
RenderSVGInlineText* text = toRenderSVGInlineText(child);
if (locateElement != text) {
if (stopAfterNext) {
next = text->layoutAttributes();
return true;
}
previous = text->layoutAttributes();
continue;
}
stopAfterNext = true;
continue;
}
if (!child->isSVGInline())
continue;
if (findPreviousAndNextAttributes(toRenderElement(child), locateElement, stopAfterNext, previous, next))
return true;
}
return false;
}
void RenderNamedFlowFragment::computeChildrenStyleInRegion(const RenderElement* object)
{
for (RenderObject* child = object->firstChild(); child; child = child->nextSibling()) {
auto it = m_renderObjectRegionStyle.find(child);
RefPtr<RenderStyle> childStyleInRegion;
bool objectRegionStyleCached = false;
if (it != m_renderObjectRegionStyle.end()) {
childStyleInRegion = it->value.style;
objectRegionStyleCached = true;
} else {
if (child->isAnonymous() || child->isInFlowRenderFlowThread())
childStyleInRegion = RenderStyle::createAnonymousStyleWithDisplay(&object->style(), child->style().display());
else if (child->isText())
childStyleInRegion = RenderStyle::clone(&object->style());
else
childStyleInRegion = computeStyleInRegion(child);
}
setObjectStyleInRegion(child, childStyleInRegion, objectRegionStyleCached);
if (child->isRenderElement())
computeChildrenStyleInRegion(toRenderElement(child));
}
}
void SVGTextRunRenderingContext::drawSVGGlyphs(GraphicsContext* context, const SimpleFontData* fontData, const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point) const
{
auto activePaintingResource = this->activePaintingResource();
if (!activePaintingResource) {
// TODO: We're only supporting simple filled HTML text so far.
RenderSVGResourceSolidColor* solidPaintingResource = RenderSVGResource::sharedSolidPaintingResource();
solidPaintingResource->setColor(context->fillColor());
activePaintingResource = solidPaintingResource;
}
auto& elementRenderer = renderer().isRenderElement() ? toRenderElement(renderer()) : *renderer().parent();
RenderStyle& style = elementRenderer.style();
ASSERT(activePaintingResource);
RenderSVGResourceMode resourceMode = context->textDrawingMode() == TextModeStroke ? ApplyToStrokeMode : ApplyToFillMode;
auto translator(createGlyphToPathTranslator(*fontData, glyphBuffer, from, numGlyphs, point));
while (translator->containsMorePaths()) {
Path glyphPath = translator->nextPath();
if (activePaintingResource->applyResource(elementRenderer, style, context, resourceMode)) {
float strokeThickness = context->strokeThickness();
if (renderer().isSVGInlineText())
context->setStrokeThickness(strokeThickness * toRenderSVGInlineText(renderer()).scalingFactor());
activePaintingResource->postApplyResource(elementRenderer, context, resourceMode, &glyphPath, 0);
context->setStrokeThickness(strokeThickness);
}
}
}
void SVGResourcesCache::clientWillBeRemovedFromTree(RenderObject& renderer)
{
if (renderer.isAnonymous())
return;
RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer, false);
if (!rendererCanHaveResources(renderer))
return;
RenderElement& elementRenderer = toRenderElement(renderer);
SVGResourcesCache* cache = resourcesCacheFromRenderObject(elementRenderer);
cache->removeResourcesFromRenderer(elementRenderer);
}
void RenderMathMLRoot::addChild(RenderObject* newChild, RenderObject* beforeChild)
{
// Insert an implicit <mrow> for <mroot> as well as <msqrt>, to ensure firstChild() will have a box
// to measure and store a glyph-based height for preferredLogicalHeightAfterSizing.
if (!firstChild())
RenderMathMLBlock::addChild(RenderMathMLRow::createAnonymousWithParentRenderer(this));
// An <mroot>'s index has { position: absolute }.
if (newChild->style().position() == AbsolutePosition)
RenderMathMLBlock::addChild(newChild);
else
toRenderElement(firstChild())->addChild(newChild, beforeChild && beforeChild->parent() == firstChild() ? beforeChild : 0);
}
std::unique_ptr<GlyphToPathTranslator> SVGTextRunRenderingContext::createGlyphToPathTranslator(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 std::make_unique<DummyGlyphToPathTranslator>();
auto& elementRenderer = renderer().isRenderElement() ? toRenderElement(renderer()) : *renderer().parent();
RenderStyle& style = elementRenderer.style();
bool isVerticalText = style.svgStyle().isVerticalWritingMode();
float scale = scaleEmToUnits(fontData.platformData().size(), fontFaceElement->unitsPerEm());
return std::make_unique<SVGGlyphToPathTranslator>(glyphBuffer, point, *svgFontData, *fontElement, from, numGlyphs, scale, isVerticalText);
}
void RenderNamedFlowFragment::setObjectStyleInRegion(RenderObject* object, PassRefPtr<RenderStyle> styleInRegion, bool objectRegionStyleCached)
{
ASSERT(object->flowThreadContainingBlock());
RefPtr<RenderStyle> objectOriginalStyle = &object->style();
if (object->isRenderElement())
toRenderElement(object)->setStyleInternal(*styleInRegion);
if (object->isBoxModelObject() && !object->hasBoxDecorations()) {
bool hasBoxDecorations = object->isTableCell()
|| object->style().hasBackground()
|| object->style().hasBorder()
|| object->style().hasAppearance()
|| object->style().boxShadow();
object->setHasBoxDecorations(hasBoxDecorations);
}
ObjectRegionStyleInfo styleInfo;
styleInfo.style = objectOriginalStyle;
styleInfo.cached = objectRegionStyleCached;
m_renderObjectRegionStyle.set(object, styleInfo);
}
void RenderFrameSet::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (paintInfo.phase != PaintPhaseForeground)
return;
RenderObject* child = firstChild();
if (!child)
return;
LayoutPoint adjustedPaintOffset = paintOffset + location();
size_t rows = m_rows.m_sizes.size();
size_t cols = m_cols.m_sizes.size();
LayoutUnit borderThickness = frameSetElement().border();
LayoutUnit yPos = 0;
for (size_t r = 0; r < rows; r++) {
LayoutUnit xPos = 0;
for (size_t c = 0; c < cols; c++) {
toRenderElement(child)->paint(paintInfo, adjustedPaintOffset);
xPos += m_cols.m_sizes[c];
if (borderThickness && m_cols.m_allowBorder[c + 1]) {
paintColumnBorder(paintInfo, pixelSnappedIntRect(LayoutRect(adjustedPaintOffset.x() + xPos, adjustedPaintOffset.y() + yPos, borderThickness, height())));
xPos += borderThickness;
}
child = child->nextSibling();
if (!child)
return;
}
yPos += m_rows.m_sizes[r];
if (borderThickness && m_rows.m_allowBorder[r + 1]) {
paintRowBorder(paintInfo, pixelSnappedIntRect(LayoutRect(adjustedPaintOffset.x(), adjustedPaintOffset.y() + yPos, width(), borderThickness)));
yPos += borderThickness;
}
}
}
void RenderSVGRoot::paintReplaced(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
// An empty viewport disables rendering.
if (pixelSnappedBorderBoxRect().isEmpty())
return;
// Don't paint, if the context explicitly disabled it.
if (paintInfo.context->paintingDisabled())
return;
// An empty viewBox also disables rendering.
// (http://www.w3.org/TR/SVG/coords.html#ViewBoxAttribute)
if (svgSVGElement().hasEmptyViewBox())
return;
Page* page = frame().page();
// Don't paint if we don't have kids, except if we have filters we should paint those.
if (!firstChild()) {
SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
if (!resources || !resources->filter()) {
if (page && paintInfo.phase == PaintPhaseForeground)
page->addRelevantUnpaintedObject(this, visualOverflowRect());
return;
}
}
if (page && paintInfo.phase == PaintPhaseForeground)
page->addRelevantRepaintedObject(this, visualOverflowRect());
// Make a copy of the PaintInfo because applyTransform will modify the damage rect.
PaintInfo childPaintInfo(paintInfo);
childPaintInfo.context->save();
// Apply initial viewport clip - not affected by overflow handling
childPaintInfo.context->clip(pixelSnappedIntRect(overflowClipRect(paintOffset, paintInfo.renderRegion)));
// Convert from container offsets (html renderers) to a relative transform (svg renderers).
// Transform from our paint container's coordinate system to our local coords.
IntPoint adjustedPaintOffset = roundedIntPoint(paintOffset);
childPaintInfo.applyTransform(AffineTransform::translation(adjustedPaintOffset.x(), adjustedPaintOffset.y()) * localToBorderBoxTransform());
// SVGRenderingContext must be destroyed before we restore the childPaintInfo.context, because a filter may have
// changed the context and it is only reverted when the SVGRenderingContext destructor finishes applying the filter.
{
SVGRenderingContext renderingContext;
bool continueRendering = true;
if (childPaintInfo.phase == PaintPhaseForeground) {
renderingContext.prepareToRenderSVGContent(*this, childPaintInfo);
continueRendering = renderingContext.isRenderingPrepared();
}
if (continueRendering) {
childPaintInfo.updateSubtreePaintRootForChildren(this);
for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
// FIXME: Can this ever have RenderText children?
if (!child->isRenderElement())
continue;
toRenderElement(child)->paint(childPaintInfo, location());
}
}
}
childPaintInfo.context->restore();
}
void SVGRenderSupport::layoutChildren(RenderObject* start, bool selfNeedsLayout)
{
bool layoutSizeChanged = layoutSizeOfNearestViewportChanged(start);
bool transformChanged = transformToRootChanged(start);
bool hasSVGShadow = rendererHasSVGShadow(start);
bool needsBoundariesUpdate = start->needsBoundariesUpdate();
HashSet<RenderObject*> notlayoutedObjects;
for (RenderObject* child = start->firstChildSlow(); child; child = child->nextSibling()) {
bool needsLayout = selfNeedsLayout;
bool childEverHadLayout = child->everHadLayout();
if (needsBoundariesUpdate && hasSVGShadow) {
// If we have a shadow, our shadow is baked into our children's cached boundaries,
// so they need to update.
child->setNeedsBoundariesUpdate();
needsLayout = true;
}
if (transformChanged) {
// If the transform changed we need to update the text metrics (note: this also happens for layoutSizeChanged=true).
if (child->isSVGText())
toRenderSVGText(child)->setNeedsTextMetricsUpdate();
needsLayout = true;
}
if (layoutSizeChanged) {
// When selfNeedsLayout is false and the layout size changed, we have to check whether this child uses relative lengths
if (SVGElement* element = child->node()->isSVGElement() ? toSVGElement(child->node()) : 0) {
if (element->hasRelativeLengths()) {
// When the layout size changed and when using relative values tell the RenderSVGShape to update its shape object
if (child->isSVGShape())
toRenderSVGShape(child)->setNeedsShapeUpdate();
else if (child->isSVGText()) {
toRenderSVGText(child)->setNeedsTextMetricsUpdate();
toRenderSVGText(child)->setNeedsPositioningValuesUpdate();
}
needsLayout = true;
}
}
}
if (needsLayout)
child->setNeedsLayout(MarkOnlyThis);
if (child->needsLayout()) {
toRenderElement(child)->layout();
// Renderers are responsible for repainting themselves when changing, except
// for the initial paint to avoid potential double-painting caused by non-sensical "old" bounds.
// We could handle this in the individual objects, but for now it's easier to have
// parent containers call repaint(). (RenderBlock::layout* has similar logic.)
if (!childEverHadLayout)
child->repaint();
} else if (layoutSizeChanged)
notlayoutedObjects.add(child);
ASSERT(!child->needsLayout());
}
if (!layoutSizeChanged) {
ASSERT(notlayoutedObjects.isEmpty());
return;
}
// If the layout size changed, invalidate all resources of all children that didn't go through the layout() code path.
HashSet<RenderObject*>::iterator end = notlayoutedObjects.end();
for (HashSet<RenderObject*>::iterator it = notlayoutedObjects.begin(); it != end; ++it)
invalidateResourcesOfChildren(*it);
}
bool SVGFontData::applySVGGlyphSelection(WidthIterator& iterator, GlyphData& glyphData, bool mirror, unsigned currentCharacter, unsigned& advanceLength) const
{
const TextRun& run = iterator.run();
Vector<SVGGlyph::ArabicForm>& arabicForms = iterator.arabicForms();
ASSERT(run.charactersLength() >= currentCharacter);
// Associate text with arabic forms, if needed.
String remainingTextInRun;
if (run.is8Bit()) {
remainingTextInRun = String(run.data8(currentCharacter), run.charactersLength() - currentCharacter);
remainingTextInRun = Font::normalizeSpaces(remainingTextInRun.characters8(), remainingTextInRun.length());
} else {
remainingTextInRun = String(run.data16(currentCharacter), run.charactersLength() - currentCharacter);
remainingTextInRun = Font::normalizeSpaces(remainingTextInRun.characters16(), remainingTextInRun.length());
}
if (mirror)
remainingTextInRun = createStringWithMirroredCharacters(remainingTextInRun);
if (!currentCharacter && arabicForms.isEmpty())
arabicForms = charactersWithArabicForm(remainingTextInRun, mirror);
SVGFontFaceElement* svgFontFaceElement = this->svgFontFaceElement();
ASSERT(svgFontFaceElement);
SVGFontElement* associatedFontElement = svgFontFaceElement->associatedFontElement();
ASSERT(associatedFontElement);
RenderObject* renderObject = 0;
if (TextRun::RenderingContext* renderingContext = run.renderingContext())
renderObject = &static_cast<SVGTextRunRenderingContext*>(renderingContext)->renderer();
String language;
bool isVerticalText = false;
Vector<String> altGlyphNames;
if (renderObject) {
RenderElement* parentRenderer = renderObject->isRenderElement() ? toRenderElement(renderObject) : renderObject->parent();
ASSERT(parentRenderer);
isVerticalText = parentRenderer->style().svgStyle().isVerticalWritingMode();
if (Element* parentRendererElement = parentRenderer->element()) {
language = parentRendererElement->getAttribute(XMLNames::langAttr);
if (isSVGAltGlyphElement(parentRendererElement)) {
SVGAltGlyphElement* altGlyph = toSVGAltGlyphElement(parentRendererElement);
if (!altGlyph->hasValidGlyphElements(altGlyphNames))
altGlyphNames.clear();
}
}
}
Vector<SVGGlyph> glyphs;
size_t altGlyphNamesSize = altGlyphNames.size();
if (altGlyphNamesSize) {
for (size_t index = 0; index < altGlyphNamesSize; ++index)
associatedFontElement->collectGlyphsForGlyphName(altGlyphNames[index], glyphs);
// Assign the unicodeStringLength now that its known.
size_t glyphsSize = glyphs.size();
for (size_t i = 0; i < glyphsSize; ++i)
glyphs[i].unicodeStringLength = run.length();
// Do not check alt glyphs for compatibility. Just return the first one.
// Later code will fail if we do not do this and the glyph is incompatible.
if (glyphsSize) {
SVGGlyph& svgGlyph = glyphs[0];
iterator.setLastGlyphName(svgGlyph.glyphName);
glyphData.glyph = svgGlyph.tableEntry;
advanceLength = svgGlyph.unicodeStringLength;
return true;
}
} else
associatedFontElement->collectGlyphsForString(remainingTextInRun, glyphs);
size_t glyphsSize = glyphs.size();
for (size_t i = 0; i < glyphsSize; ++i) {
SVGGlyph& svgGlyph = glyphs[i];
if (svgGlyph.isPartOfLigature)
continue;
if (!isCompatibleGlyph(svgGlyph, isVerticalText, language, arabicForms, currentCharacter, currentCharacter + svgGlyph.unicodeStringLength))
continue;
iterator.setLastGlyphName(svgGlyph.glyphName);
glyphData.glyph = svgGlyph.tableEntry;
advanceLength = svgGlyph.unicodeStringLength;
return true;
}
iterator.setLastGlyphName(String());
return false;
}
GlyphData SVGTextRunRenderingContext::glyphDataForCharacter(const Font& font, WidthIterator& iterator, UChar32 character, bool mirror, int currentCharacter, unsigned& advanceLength)
{
const SimpleFontData* primaryFont = font.primaryFont();
ASSERT(primaryFont);
pair<GlyphData, GlyphPage*> pair = font.glyphDataAndPageForCharacter(character, mirror, AutoVariant);
GlyphData glyphData = pair.first;
// Check if we have the missing glyph data, in which case we can just return.
GlyphData missingGlyphData = primaryFont->missingGlyphData();
if (glyphData.glyph == missingGlyphData.glyph && glyphData.fontData == missingGlyphData.fontData) {
ASSERT(glyphData.fontData);
return glyphData;
}
// Save data fromt he font fallback list because we may modify it later. Do this before the
// potential change to glyphData.fontData below.
FontGlyphs* glyph = font.glyphs();
ASSERT(glyph);
FontGlyphs::GlyphPagesStateSaver glyphPagesSaver(*glyph);
// Characters enclosed by an <altGlyph> element, may not be registered in the GlyphPage.
const SimpleFontData* originalFontData = glyphData.fontData;
if (glyphData.fontData && !glyphData.fontData->isSVGFont()) {
auto& elementRenderer = renderer().isRenderElement() ? toRenderElement(renderer()) : *renderer().parent();
if (Element* parentRendererElement = elementRenderer.element()) {
if (parentRendererElement->hasTagName(SVGNames::altGlyphTag))
glyphData.fontData = primaryFont;
}
}
const SimpleFontData* fontData = glyphData.fontData;
if (fontData) {
if (!fontData->isSVGFont())
return glyphData;
SVGFontElement* fontElement = 0;
SVGFontFaceElement* fontFaceElement = 0;
const SVGFontData* svgFontData = svgFontAndFontFaceElementForFontData(fontData, fontFaceElement, fontElement);
if (!fontElement || !fontFaceElement)
return glyphData;
// If we got here, we're dealing with a glyph defined in a SVG Font.
// The returned glyph by glyphDataAndPageForCharacter() is a glyph stored in the SVG Font glyph table.
// This doesn't necessarily mean the glyph is suitable for rendering/measuring in this context, its
// arabic-form/orientation/... may not match, we have to apply SVG Glyph selection to discover that.
if (svgFontData->applySVGGlyphSelection(iterator, glyphData, mirror, currentCharacter, advanceLength))
return glyphData;
}
GlyphPage* page = pair.second;
ASSERT(page);
// No suitable glyph found that is compatible with the requirments (same language, arabic-form, orientation etc.)
// Even though our GlyphPage contains an entry for eg. glyph "a", it's not compatible. So we have to temporarily
// remove the glyph data information from the GlyphPage, and retry the lookup, which handles font fallbacks correctly.
page->setGlyphDataForCharacter(character, 0, 0);
// Assure that the font fallback glyph selection worked, aka. the fallbackGlyphData font data is not the same as before.
GlyphData fallbackGlyphData = font.glyphDataForCharacter(character, mirror);
ASSERT(fallbackGlyphData.fontData != fontData);
// Restore original state of the SVG Font glyph table and the current font fallback list,
// to assure the next lookup of the same glyph won't immediately return the fallback glyph.
page->setGlyphDataForCharacter(character, glyphData.glyph, originalFontData);
ASSERT(fallbackGlyphData.fontData);
return fallbackGlyphData;
}
void SVGTextRunRenderingContext::drawSVGGlyphs(GraphicsContext* context, 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;
auto activePaintingResource = this->activePaintingResource();
if (!activePaintingResource) {
// TODO: We're only supporting simple filled HTML text so far.
RenderSVGResourceSolidColor* solidPaintingResource = RenderSVGResource::sharedSolidPaintingResource();
solidPaintingResource->setColor(context->fillColor());
activePaintingResource = solidPaintingResource;
}
auto& elementRenderer = renderer().isRenderElement() ? toRenderElement(renderer()) : *renderer().parent();
RenderStyle& style = *elementRenderer.style();
bool isVerticalText = style.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).width();
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);
if (activePaintingResource->applyResource(elementRenderer, &style, context, resourceMode)) {
float strokeThickness = context->strokeThickness();
if (renderer().isSVGInlineText())
context->setStrokeThickness(strokeThickness * toRenderSVGInlineText(renderer()).scalingFactor());
activePaintingResource->postApplyResource(elementRenderer, context, resourceMode, &glyphPath, 0);
context->setStrokeThickness(strokeThickness);
}
if (isVerticalText)
currentPoint.move(0, advance);
else
currentPoint.move(advance, 0);
}
}