AffineTransform RenderSVGResourceContainer::computeResourceSpaceTransform(RenderObject* object, const AffineTransform& baseTransform, const SVGRenderStyle* svgStyle, unsigned short resourceMode)
{
AffineTransform computedSpaceTransform = baseTransform;
if (resourceMode & ApplyToTextMode) {
// Depending on the font scaling factor, we may need to apply an
// additional transform (scale-factor) the paintserver, since text
// painting removes the scale factor from the context. (See
// SVGInlineTextBox::paintTextWithShadows.)
AffineTransform additionalTextTransformation;
if (shouldTransformOnTextPainting(object, additionalTextTransformation))
computedSpaceTransform = additionalTextTransformation * computedSpaceTransform;
}
if (resourceMode & ApplyToStrokeMode) {
// Non-scaling stroke needs to reset the transform back to the host transform.
if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
computedSpaceTransform = transformOnNonScalingStroke(object, computedSpaceTransform);
}
return computedSpaceTransform;
}
PatternData* RenderSVGResourcePattern::buildPattern(RenderElement& renderer, unsigned short resourceMode, GraphicsContext& context)
{
PatternData* currentData = m_patternMap.get(&renderer);
if (currentData && currentData->pattern)
return currentData;
if (m_shouldCollectPatternAttributes) {
patternElement().synchronizeAnimatedSVGAttribute(anyQName());
m_attributes = PatternAttributes();
patternElement().collectPatternAttributes(m_attributes);
m_shouldCollectPatternAttributes = false;
}
// If we couldn't determine the pattern content element root, stop here.
if (!m_attributes.patternContentElement())
return nullptr;
// An empty viewBox disables rendering.
if (m_attributes.hasViewBox() && m_attributes.viewBox().isEmpty())
return nullptr;
// Compute all necessary transformations to build the tile image & the pattern.
FloatRect tileBoundaries;
AffineTransform tileImageTransform;
if (!buildTileImageTransform(renderer, m_attributes, patternElement(), tileBoundaries, tileImageTransform))
return nullptr;
AffineTransform absoluteTransformIgnoringRotation = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer);
// Ignore 2D rotation, as it doesn't affect the size of the tile.
SVGRenderingContext::clear2DRotation(absoluteTransformIgnoringRotation);
FloatRect absoluteTileBoundaries = absoluteTransformIgnoringRotation.mapRect(tileBoundaries);
FloatRect clampedAbsoluteTileBoundaries;
// Scale the tile size to match the scale level of the patternTransform.
absoluteTileBoundaries.scale(static_cast<float>(m_attributes.patternTransform().xScale()),
static_cast<float>(m_attributes.patternTransform().yScale()));
// Build tile image.
auto tileImage = createTileImage(m_attributes, tileBoundaries, absoluteTileBoundaries, tileImageTransform, clampedAbsoluteTileBoundaries, context.isAcceleratedContext() ? Accelerated : Unaccelerated);
if (!tileImage)
return nullptr;
RefPtr<Image> copiedImage = tileImage->copyImage(CopyBackingStore);
if (!copiedImage)
return nullptr;
// Build pattern.
auto patternData = std::make_unique<PatternData>();
patternData->pattern = Pattern::create(copiedImage, true, true);
// Compute pattern space transformation.
const IntSize tileImageSize = tileImage->logicalSize();
patternData->transform.translate(tileBoundaries.x(), tileBoundaries.y());
patternData->transform.scale(tileBoundaries.width() / tileImageSize.width(), tileBoundaries.height() / tileImageSize.height());
AffineTransform patternTransform = m_attributes.patternTransform();
if (!patternTransform.isIdentity())
patternData->transform = patternTransform * patternData->transform;
// Account for text drawing resetting the context to non-scaled, see SVGInlineTextBox::paintTextWithShadows.
if (resourceMode & ApplyToTextMode) {
AffineTransform additionalTextTransformation;
if (shouldTransformOnTextPainting(renderer, additionalTextTransformation))
patternData->transform *= additionalTextTransformation;
}
patternData->pattern->setPatternSpaceTransform(patternData->transform);
// Various calls above may trigger invalidations in some fringe cases (ImageBuffer allocation
// failures in the SVG image cache for example). To avoid having our PatternData deleted by
// removeAllClientsFromCache(), we only make it visible in the cache at the very end.
return m_patternMap.set(&renderer, WTF::move(patternData)).iterator->value.get();
}
bool RenderSVGResourceGradient::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
ASSERT(object);
ASSERT(style);
ASSERT(context);
ASSERT(resourceMode != ApplyToDefaultMode);
// Be sure to synchronize all SVG properties on the gradientElement _before_ processing any further.
// Otherwhise the call to collectGradientAttributes() in createTileImage(), may cause the SVG DOM property
// synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
// GradientData object! Leaving out the line below will cause svg/dynamic-updates/SVG*GradientElement-svgdom* to crash.
SVGGradientElement* gradientElement = static_cast<SVGGradientElement*>(node());
if (!gradientElement)
return false;
if (m_shouldCollectGradientAttributes) {
gradientElement->synchronizeAnimatedSVGAttribute(anyQName());
if (!collectGradientAttributes(gradientElement))
return false;
m_shouldCollectGradientAttributes = false;
}
// Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified,
// then the given effect (e.g. a gradient or a filter) will be ignored.
FloatRect objectBoundingBox = object->objectBoundingBox();
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty())
return false;
OwnPtr<GradientData>& gradientData = m_gradientMap.add(object, nullptr).iterator->value;
if (!gradientData)
gradientData = adoptPtr(new GradientData);
bool isPaintingText = resourceMode & ApplyToTextMode;
// Create gradient object
if (!gradientData->gradient) {
buildGradient(gradientData.get());
// CG platforms will handle the gradient space transform for text after applying the
// resource, so don't apply it here. For non-CG platforms, we want the text bounding
// box applied to the gradient space transform now, so the gradient shader can use it.
#if USE(CG)
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && !objectBoundingBox.isEmpty() && !isPaintingText) {
#else
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && !objectBoundingBox.isEmpty()) {
#endif
gradientData->userspaceTransform.translate(objectBoundingBox.x(), objectBoundingBox.y());
gradientData->userspaceTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
}
AffineTransform gradientTransform;
calculateGradientTransform(gradientTransform);
gradientData->userspaceTransform *= gradientTransform;
if (isPaintingText) {
// Depending on font scaling factor, we may need to rescale the gradient here since
// text painting removes the scale factor from the context.
AffineTransform additionalTextTransform;
if (shouldTransformOnTextPainting(object, additionalTextTransform))
gradientData->userspaceTransform *= additionalTextTransform;
}
gradientData->gradient->setGradientSpaceTransform(gradientData->userspaceTransform);
}
if (!gradientData->gradient)
return false;
// Draw gradient
context->save();
if (isPaintingText) {
#if USE(CG)
if (!createMaskAndSwapContextForTextGradient(context, m_savedContext, m_imageBuffer, object)) {
context->restore();
return false;
}
#endif
context->setTextDrawingMode(resourceMode & ApplyToFillMode ? TextModeFill : TextModeStroke);
}
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
if (resourceMode & ApplyToFillMode) {
context->setAlpha(svgStyle->fillOpacity());
context->setFillGradient(gradientData->gradient);
context->setFillRule(svgStyle->fillRule());
} else if (resourceMode & ApplyToStrokeMode) {
if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
gradientData->gradient->setGradientSpaceTransform(transformOnNonScalingStroke(object, gradientData->userspaceTransform));
context->setAlpha(svgStyle->strokeOpacity());
context->setStrokeGradient(gradientData->gradient);
SVGRenderSupport::applyStrokeStyleToContext(context, style, object);
}
return true;
}
void RenderSVGResourceGradient::postApplyResource(RenderObject* object, GraphicsContext*& context, unsigned short resourceMode, const Path* path, const RenderSVGShape* shape)
{
ASSERT(context);
ASSERT(resourceMode != ApplyToDefaultMode);
if (resourceMode & ApplyToTextMode) {
#if USE(CG)
// CG requires special handling for gradient on text
GradientData* gradientData;
if (m_savedContext && (gradientData = m_gradientMap.get(object))) {
// Restore on-screen drawing context
context = m_savedContext;
m_savedContext = 0;
AffineTransform gradientTransform;
calculateGradientTransform(gradientTransform);
FloatRect targetRect;
gradientData->gradient->setGradientSpaceTransform(clipToTextMask(context, m_imageBuffer, targetRect, object, gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX, gradientTransform));
context->setFillGradient(gradientData->gradient);
context->fillRect(targetRect);
m_imageBuffer.clear();
}
#else
UNUSED_PARAM(object);
#endif
} else {
if (resourceMode & ApplyToFillMode) {
if (path)
context->fillPath(*path);
else if (shape)
shape->fillShape(context);
}
if (resourceMode & ApplyToStrokeMode) {
if (path)
context->strokePath(*path);
else if (shape)
shape->strokeShape(context);
}
}
context->restore();
}
bool RenderSVGResourcePattern::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
ASSERT(object);
ASSERT(style);
ASSERT(context);
ASSERT(resourceMode != ApplyToDefaultMode);
// Be sure to synchronize all SVG properties on the patternElement _before_ processing any further.
// Otherwhise the call to collectPatternAttributes() below, may cause the SVG DOM property
// synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
// PatternData object! Leaving out the line below will cause svg/dynamic-updates/SVGPatternElement-svgdom* to crash.
SVGPatternElement* patternElement = static_cast<SVGPatternElement*>(node());
if (!patternElement)
return false;
if (m_shouldCollectPatternAttributes) {
patternElement->updateAnimatedSVGAttribute(anyQName());
m_attributes = PatternAttributes();
patternElement->collectPatternAttributes(m_attributes);
m_shouldCollectPatternAttributes = false;
}
// Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified,
// then the given effect (e.g. a gradient or a filter) will be ignored.
FloatRect objectBoundingBox = object->objectBoundingBox();
if (m_attributes.patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty())
return false;
OwnPtr<PatternData>& patternData = m_patternMap.add(object, nullptr).iterator->second;
if (!patternData)
patternData = adoptPtr(new PatternData);
if (!patternData->pattern) {
// If we couldn't determine the pattern content element root, stop here.
if (!m_attributes.patternContentElement())
return false;
// Compute all necessary transformations to build the tile image & the pattern.
FloatRect tileBoundaries;
AffineTransform tileImageTransform;
if (!buildTileImageTransform(object, m_attributes, patternElement, tileBoundaries, tileImageTransform))
return false;
AffineTransform absoluteTransformIgnoringRotation;
SVGRenderingContext::calculateTransformationToOutermostSVGCoordinateSystem(object, absoluteTransformIgnoringRotation);
// Ignore 2D rotation, as it doesn't affect the size of the tile.
SVGRenderingContext::clear2DRotation(absoluteTransformIgnoringRotation);
FloatRect absoluteTileBoundaries = absoluteTransformIgnoringRotation.mapRect(tileBoundaries);
FloatRect clampedAbsoluteTileBoundaries;
// Scale the tile size to match the scale level of the patternTransform.
absoluteTileBoundaries.scale(static_cast<float>(m_attributes.patternTransform().xScale()),
static_cast<float>(m_attributes.patternTransform().yScale()));
// Build tile image.
OwnPtr<ImageBuffer> tileImage = createTileImage(m_attributes, tileBoundaries, absoluteTileBoundaries, tileImageTransform, clampedAbsoluteTileBoundaries);
if (!tileImage)
return false;
RefPtr<Image> copiedImage = tileImage->copyImage(CopyBackingStore);
if (!copiedImage)
return false;
// Build pattern.
patternData->pattern = Pattern::create(copiedImage, true, true);
if (!patternData->pattern)
return false;
// Compute pattern space transformation.
patternData->transform.translate(tileBoundaries.x(), tileBoundaries.y());
patternData->transform.scale(tileBoundaries.width() / clampedAbsoluteTileBoundaries.width(), tileBoundaries.height() / clampedAbsoluteTileBoundaries.height());
AffineTransform patternTransform = m_attributes.patternTransform();
if (!patternTransform.isIdentity())
patternData->transform = patternTransform * patternData->transform;
// Account for text drawing resetting the context to non-scaled, see SVGInlineTextBox::paintTextWithShadows.
if (resourceMode & ApplyToTextMode) {
AffineTransform additionalTextTransformation;
if (shouldTransformOnTextPainting(object, additionalTextTransformation))
patternData->transform *= additionalTextTransformation;
}
patternData->pattern->setPatternSpaceTransform(patternData->transform);
}
// Draw pattern
context->save();
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
if (resourceMode & ApplyToFillMode) {
context->setAlpha(svgStyle->fillOpacity());
context->setFillPattern(patternData->pattern);
context->setFillRule(svgStyle->fillRule());
} else if (resourceMode & ApplyToStrokeMode) {
if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
patternData->pattern->setPatternSpaceTransform(transformOnNonScalingStroke(object, patternData->transform));
context->setAlpha(svgStyle->strokeOpacity());
context->setStrokePattern(patternData->pattern);
SVGRenderSupport::applyStrokeStyleToContext(context, style, object);
}
if (resourceMode & ApplyToTextMode) {
if (resourceMode & ApplyToFillMode) {
context->setTextDrawingMode(TextModeFill);
#if USE(CG)
context->applyFillPattern();
#endif
} else if (resourceMode & ApplyToStrokeMode) {
context->setTextDrawingMode(TextModeStroke);
#if USE(CG)
context->applyStrokePattern();
#endif
}
}
return true;
}
bool RenderSVGResourceGradient::applyResource(RenderObject* object, RenderStyle* style, GraphicsContext*& context, unsigned short resourceMode)
{
ASSERT(object);
ASSERT(style);
ASSERT(context);
ASSERT(resourceMode != ApplyToDefaultMode);
clearInvalidationMask();
// Be sure to synchronize all SVG properties on the gradientElement _before_ processing any further.
// Otherwhise the call to collectGradientAttributes() in createTileImage(), may cause the SVG DOM property
// synchronization to kick in, which causes removeAllClientsFromCache() to be called, which in turn deletes our
// GradientData object! Leaving out the line below will cause svg/dynamic-updates/SVG*GradientElement-svgdom* to crash.
SVGGradientElement* gradientElement = toSVGGradientElement(element());
if (!gradientElement)
return false;
if (m_shouldCollectGradientAttributes) {
gradientElement->synchronizeAnimatedSVGAttribute(anyQName());
if (!collectGradientAttributes(gradientElement))
return false;
m_shouldCollectGradientAttributes = false;
}
// Spec: When the geometry of the applicable element has no width or height and objectBoundingBox is specified,
// then the given effect (e.g. a gradient or a filter) will be ignored.
FloatRect objectBoundingBox = object->objectBoundingBox();
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && objectBoundingBox.isEmpty())
return false;
OwnPtr<GradientData>& gradientData = m_gradientMap.add(object, nullptr).iterator->value;
if (!gradientData)
gradientData = adoptPtr(new GradientData);
bool isPaintingText = resourceMode & ApplyToTextMode;
// Create gradient object
if (!gradientData->gradient) {
buildGradient(gradientData.get());
// We want the text bounding box applied to the gradient space transform now, so the gradient shader can use it.
if (gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX && !objectBoundingBox.isEmpty()) {
gradientData->userspaceTransform.translate(objectBoundingBox.x(), objectBoundingBox.y());
gradientData->userspaceTransform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
}
AffineTransform gradientTransform;
calculateGradientTransform(gradientTransform);
gradientData->userspaceTransform *= gradientTransform;
if (isPaintingText) {
// Depending on font scaling factor, we may need to rescale the gradient here since
// text painting removes the scale factor from the context.
AffineTransform additionalTextTransform;
if (shouldTransformOnTextPainting(object, additionalTextTransform))
gradientData->userspaceTransform *= additionalTextTransform;
}
gradientData->gradient->setGradientSpaceTransform(gradientData->userspaceTransform);
}
if (!gradientData->gradient)
return false;
// Draw gradient
context->save();
if (isPaintingText)
context->setTextDrawingMode(resourceMode & ApplyToFillMode ? TextModeFill : TextModeStroke);
const SVGRenderStyle* svgStyle = style->svgStyle();
ASSERT(svgStyle);
if (resourceMode & ApplyToFillMode) {
context->setAlpha(svgStyle->fillOpacity());
context->setFillGradient(gradientData->gradient);
context->setFillRule(svgStyle->fillRule());
} else if (resourceMode & ApplyToStrokeMode) {
if (svgStyle->vectorEffect() == VE_NON_SCALING_STROKE)
gradientData->gradient->setGradientSpaceTransform(transformOnNonScalingStroke(object, gradientData->userspaceTransform));
context->setAlpha(svgStyle->strokeOpacity());
context->setStrokeGradient(gradientData->gradient);
SVGRenderSupport::applyStrokeStyleToContext(context, style, object);
}
return true;
}