bool SVGPaintServerGradient::setup(GraphicsContext*& context, const RenderObject* object, SVGPaintTargetType type, bool isPaintingText) const
{
m_ownerElement->buildGradient();
const SVGRenderStyle* style = object->style()->svgStyle();
bool isFilled = (type & ApplyToFillTargetType) && style->hasFill();
bool isStroked = (type & ApplyToStrokeTargetType) && style->hasStroke();
ASSERT(isFilled && !isStroked || !isFilled && isStroked);
context->save();
if (isPaintingText) {
#if PLATFORM(CG)
if (!createMaskAndSwapContextForTextGradient(context, m_savedContext, m_imageBuffer, object)) {
context->restore();
return false;
}
#endif
context->setTextDrawingMode(isFilled ? cTextFill : cTextStroke);
}
if (isFilled) {
context->setAlpha(style->fillOpacity());
context->setFillGradient(m_gradient);
context->setFillRule(style->fillRule());
}
if (isStroked) {
context->setAlpha(style->strokeOpacity());
context->setStrokeGradient(m_gradient);
applyStrokeStyleToContext(context, object->style(), object);
}
if (boundingBoxMode() && !isPaintingText) {
FloatRect bbox = object->relativeBBox(false);
// Don't use gradientes for 1d objects like horizontal/vertical
// lines or rectangles without width or height.
if (bbox.width() == 0 || bbox.height() == 0) {
Color color(0, 0, 0);
context->setStrokeColor(color);
return true;
}
context->translate(bbox.x(), bbox.y());
context->scale(FloatSize(bbox.width(), bbox.height()));
// With scaling the context, the strokeThickness is scaled too. We have to
// undo this.
float strokeThickness = std::max((context->strokeThickness() / ((bbox.width() + bbox.height()) / 2) - 0.001f), 0.f);
context->setStrokeThickness(strokeThickness);
}
context->concatCTM(gradientTransform());
context->setSpreadMethod(spreadMethod());
return true;
}
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 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 invalidateClients() 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;
gradientElement->updateAnimatedSVGAttribute(anyQName());
if (!m_gradient.contains(object))
m_gradient.set(object, new GradientData);
GradientData* gradientData = m_gradient.get(object);
// Create gradient object
if (!gradientData->gradient)
buildGradient(gradientData, gradientElement);
if (!gradientData->gradient)
return false;
// Draw gradient
context->save();
bool isPaintingText = resourceMode & ApplyToTextMode;
if (isPaintingText) {
#if PLATFORM(CG)
if (!createMaskAndSwapContextForTextGradient(context, m_savedContext, m_imageBuffer, object)) {
context->restore();
return false;
}
#endif
context->setTextDrawingMode(resourceMode & ApplyToFillMode ? cTextFill : cTextStroke);
}
AffineTransform transform;
// 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 PLATFORM(CG)
if (gradientData->boundingBoxMode && !isPaintingText) {
#else
if (gradientData->boundingBoxMode) {
#endif
FloatRect objectBoundingBox = object->objectBoundingBox();
transform.translate(objectBoundingBox.x(), objectBoundingBox.y());
transform.scaleNonUniform(objectBoundingBox.width(), objectBoundingBox.height());
}
transform.multiply(gradientData->transform);
gradientData->gradient->setGradientSpaceTransform(transform);
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) {
context->setAlpha(svgStyle->strokeOpacity());
context->setStrokeGradient(gradientData->gradient);
applyStrokeStyleToContext(context, style, object);
}
return true;
}
void RenderSVGResourceGradient::postApplyResource(RenderObject* object, GraphicsContext*& context, unsigned short resourceMode)
{
ASSERT(context);
ASSERT(resourceMode != ApplyToDefaultMode);
if (resourceMode & ApplyToTextMode) {
#if PLATFORM(CG)
// CG requires special handling for gradient on text
if (m_savedContext && m_gradient.contains(object)) {
GradientData* gradientData = m_gradient.get(object);
// Restore on-screen drawing context
context = m_savedContext;
m_savedContext = 0;
gradientData->gradient->setGradientSpaceTransform(clipToTextMask(context, m_imageBuffer, object, gradientData));
context->setFillGradient(gradientData->gradient);
const RenderObject* textRootBlock = findTextRootObject(object);
context->fillRect(textRootBlock->repaintRectInLocalCoordinates());
m_imageBuffer.clear();
}
#else
UNUSED_PARAM(object);
#endif
} else {
if (resourceMode & ApplyToFillMode)
context->fillPath();
else if (resourceMode & ApplyToStrokeMode)
context->strokePath();
}
context->restore();
}