void SVGResourceFilter::prepareFilter(GraphicsContext*& context, const RenderObject* object)
{
m_itemBBox = object->objectBoundingBox();
m_filterBBox = filterBBoxForItemBBox(m_itemBBox);
// clip sourceImage to filterRegion
FloatRect clippedSourceRect = m_itemBBox;
clippedSourceRect.intersect(m_filterBBox);
// prepare Filters
m_filter = SVGFilter::create(m_itemBBox, m_filterBBox, m_effectBBoxMode, m_filterBBoxMode);
FilterEffect* lastEffect = m_filterBuilder->lastEffect();
if (lastEffect)
lastEffect->calculateEffectRect(m_filter.get());
// Draw the content of the current element and it's childs to a imageBuffer to get the SourceGraphic.
// The size of the SourceGraphic is clipped to the size of the filterRegion.
IntRect bufferRect = enclosingIntRect(clippedSourceRect);
OwnPtr<ImageBuffer> sourceGraphic(ImageBuffer::create(bufferRect.size(), LinearRGB));
if (!sourceGraphic.get())
return;
GraphicsContext* sourceGraphicContext = sourceGraphic->context();
sourceGraphicContext->translate(-m_itemBBox.x(), -m_itemBBox.y());
sourceGraphicContext->clearRect(FloatRect(FloatPoint(), m_itemBBox.size()));
m_sourceGraphicBuffer.set(sourceGraphic.release());
m_savedContext = context;
context = sourceGraphicContext;
}
GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* oldContext)
{
ASSERT(m_renderLayer);
FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
filter->allocateBackingStoreIfNeeded();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext || !FilterEffect::isFilterSizeValid(filter->absoluteFilterRegion())) {
// Disable the filters and continue.
m_haveFilterEffect = false;
return oldContext;
}
m_savedGraphicsContext = oldContext;
// Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
sourceGraphicsContext->save();
// FIXME: can we just use sourceImageRect for everything, and get rid of
// m_repaintRect?
FloatPoint offset = filter->sourceImageRect().location();
sourceGraphicsContext->translate(-offset.x(), -offset.y());
sourceGraphicsContext->clearRect(m_repaintRect);
sourceGraphicsContext->clip(m_repaintRect);
return sourceGraphicsContext;
}
GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(RenderLayer* renderLayer, GraphicsContext* oldContext, const LayoutRect& filterRect)
{
ASSERT(m_haveFilterEffect && renderLayer->filter());
m_savedGraphicsContext = oldContext;
m_renderLayer = renderLayer;
m_paintOffset = filterRect.location();
FloatRect filterSourceRect = filterRect;
filterSourceRect.setLocation(LayoutPoint());
FilterEffectRenderer* filter = renderLayer->filter();
filter->updateBackingStore(filterSourceRect);
filter->prepare();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext) {
// Could not allocate a new graphics context. Disable the filters and continue.
m_haveFilterEffect = false;
return m_savedGraphicsContext;
}
sourceGraphicsContext->save();
sourceGraphicsContext->translate(-filterRect.x(), -filterRect.y());
sourceGraphicsContext->clearRect(filterRect);
return sourceGraphicsContext;
}
void CoordinatedLayerTreeHost::paintLayerContents(const GraphicsLayer* graphicsLayer, GraphicsContext& graphicsContext, const IntRect& clipRect)
{
if (graphicsLayer == m_pageOverlayLayer) {
// Overlays contain transparent contents and won't clear the context as part of their rendering, so we do it here.
graphicsContext.clearRect(clipRect);
m_webPage->drawPageOverlay(m_pageOverlay.get(), graphicsContext, clipRect);
return;
}
}
virtual void paint(GraphicsContext& context, const IntRect& contentRect)
{
double paintStart = currentTime();
context.clearRect(contentRect);
context.clip(contentRect);
m_owner->paintGraphicsLayerContents(context, contentRect);
double paintEnd = currentTime();
double pixelsPerSec = (contentRect.width() * contentRect.height()) / (paintEnd - paintStart);
PlatformBridge::histogramCustomCounts("Renderer4.AccelContentPaintDurationMS", (paintEnd - paintStart) * 1000, 0, 120, 30);
PlatformBridge::histogramCustomCounts("Renderer4.AccelContentPaintMegapixPerSecond", pixelsPerSec / 1000000, 10, 210, 30);
}
void CanvasRenderingContext2D::clearRect(float x, float y, float width, float height)
{
if (!validateRectForCanvas(x, y, width, height))
return;
GraphicsContext* c = drawingContext();
if (!c)
return;
FloatRect rect(x, y, width, height);
willDraw(rect);
c->clearRect(rect);
}
void BitmapTextureImageBuffer::updateContents(TextureMapper*, GraphicsLayer* sourceLayer, const IntRect& targetRect, const IntPoint& sourceOffset, UpdateContentsFlag)
{
GraphicsContext* context = m_image->context();
context->clearRect(targetRect);
IntRect sourceRect(targetRect);
sourceRect.setLocation(sourceOffset);
context->save();
context->translate(targetRect.x() - sourceOffset.x(), targetRect.y() - sourceOffset.y());
sourceLayer->paintGraphicsLayerContents(*context, sourceRect);
context->restore();
}
void CanvasRenderingContext2D::clearRect(float x, float y, float width, float height, ExceptionCode& ec)
{
ec = 0;
if (!(width >= 0 && height >= 0)) {
ec = INDEX_SIZE_ERR;
return;
}
GraphicsContext* c = drawingContext();
if (!c)
return;
FloatRect rect(x, y, width, height);
willDraw(rect);
c->clearRect(rect);
}
void RegionOverlay::drawRect(PageOverlay&, GraphicsContext& context, const IntRect& dirtyRect)
{
context.clearRect(dirtyRect);
if (!m_region)
return;
GraphicsContextStateSaver saver(context);
context.setFillColor(m_color);
for (auto rect : m_region->rects()) {
if (rect.intersects(dirtyRect))
context.fillRect(rect);
}
}
GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* context)
{
ASSERT(m_renderLayer);
FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
if (m_renderLayer->renderer()->document().settings()->deferredFiltersEnabled()) {
SkiaImageFilterBuilder builder(context);
RefPtr<ImageFilter> imageFilter = builder.build(filter->lastEffect().get(), ColorSpaceDeviceRGB);
if (!imageFilter) {
m_haveFilterEffect = false;
return context;
}
m_savedGraphicsContext = context;
context->save();
FloatRect boundaries = mapImageFilterRect(imageFilter.get(), m_filterBoxRect);
context->translate(m_filterBoxRect.x(), m_filterBoxRect.y());
boundaries.move(-m_filterBoxRect.x(), -m_filterBoxRect.y());
context->beginLayer(1, CompositeSourceOver, &boundaries, ColorFilterNone, imageFilter.get());
context->translate(-m_filterBoxRect.x(), -m_filterBoxRect.y());
return context;
}
filter->allocateBackingStoreIfNeeded();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext || !FilterEffect::isFilterSizeValid(filter->absoluteFilterRegion())) {
// Disable the filters and continue.
m_haveFilterEffect = false;
return context;
}
m_savedGraphicsContext = context;
// Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
sourceGraphicsContext->save();
// FIXME: can we just use sourceImageRect for everything, and get rid of
// m_paintInvalidationRect?
FloatPoint offset = filter->sourceImageRect().location();
sourceGraphicsContext->translate(-offset.x(), -offset.y());
sourceGraphicsContext->clearRect(m_paintInvalidationRect);
sourceGraphicsContext->clip(m_paintInvalidationRect);
return sourceGraphicsContext;
}
void FindController::drawRect(PageOverlay*, GraphicsContext& graphicsContext, const IntRect& dirtyRect)
{
Color overlayBackgroundColor(0.1f, 0.1f, 0.1f, 0.25f);
Vector<IntRect> rects = rectsForTextMatches();
// Draw the background.
graphicsContext.fillRect(dirtyRect, overlayBackgroundColor, ColorSpaceSRGB);
{
GraphicsContextStateSaver stateSaver(graphicsContext);
#if ENABLE(LEGACY_FIND_INDICATOR_STYLE)
graphicsContext.setShadow(FloatSize(shadowOffsetX, shadowOffsetY), shadowBlurRadius, Color::black, ColorSpaceSRGB);
#endif
graphicsContext.setFillColor(Color::white, ColorSpaceSRGB);
// Draw white frames around the holes.
for (auto& rect : rects) {
IntRect whiteFrameRect = rect;
whiteFrameRect.inflate(1);
graphicsContext.fillRect(whiteFrameRect);
}
}
// Clear out the holes.
for (auto& rect : rects)
graphicsContext.clearRect(rect);
if (!m_isShowingFindIndicator)
return;
if (Frame* selectedFrame = frameWithSelection(m_webPage->corePage())) {
IntRect findIndicatorRect = selectedFrame->view()->contentsToWindow(enclosingIntRect(selectedFrame->selection().selectionBounds()));
if (findIndicatorRect != m_findIndicatorRect)
hideFindIndicator();
}
}
bool FilterEffectRendererHelper::beginFilterEffect()
{
ASSERT(m_renderLayer);
FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
filter->allocateBackingStoreIfNeeded();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext || filter->filterRegion().isEmpty() || ImageBuffer::sizeNeedsClamping(filter->filterRegion().size())) {
// Disable the filters and continue.
m_haveFilterEffect = false;
return false;
}
// Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
sourceGraphicsContext->save();
sourceGraphicsContext->translate(-m_paintOffset.x(), -m_paintOffset.y());
sourceGraphicsContext->clearRect(m_repaintRect);
sourceGraphicsContext->clip(m_repaintRect);
m_startedFilterEffect = true;
return true;
}
void FindController::drawRect(PageOverlay*, GraphicsContext& graphicsContext, const IntRect& dirtyRect)
{
Color overlayBackgroundColor(overlayBackgroundRed, overlayBackgroundGreen, overlayBackgroundBlue, overlayBackgroundAlpha);
Vector<IntRect> rects = rectsForTextMatches();
// Draw the background.
graphicsContext.fillRect(dirtyRect, overlayBackgroundColor, ColorSpaceSRGB);
{
GraphicsContextStateSaver stateSaver(graphicsContext);
graphicsContext.setShadow(FloatSize(shadowOffsetX, shadowOffsetY), shadowBlurRadius, Color::black, ColorSpaceSRGB);
graphicsContext.setFillColor(Color::white, ColorSpaceSRGB);
// Draw white frames around the holes.
for (size_t i = 0; i < rects.size(); ++i) {
IntRect whiteFrameRect = rects[i];
whiteFrameRect.inflate(1);
graphicsContext.fillRect(whiteFrameRect);
}
}
// Clear out the holes.
for (size_t i = 0; i < rects.size(); ++i)
graphicsContext.clearRect(rects[i]);
if (!m_isShowingFindIndicator)
return;
if (Frame* selectedFrame = frameWithSelection(m_webPage->corePage())) {
IntRect findIndicatorRect = selectedFrame->view()->contentsToWindow(enclosingIntRect(selectedFrame->selection().selectionBounds()));
if (findIndicatorRect != m_findIndicatorRect)
hideFindIndicator();
}
}
GraphicsContext* FilterEffectRendererHelper::beginFilterEffect(GraphicsContext* oldContext)
{
ASSERT(m_renderLayer);
FilterEffectRenderer* filter = m_renderLayer->filterRenderer();
filter->allocateBackingStoreIfNeeded();
// Paint into the context that represents the SourceGraphic of the filter.
GraphicsContext* sourceGraphicsContext = filter->inputContext();
if (!sourceGraphicsContext || !isFilterSizeValid(filter->filterRegion())) {
// Disable the filters and continue.
m_haveFilterEffect = false;
return oldContext;
}
m_savedGraphicsContext = oldContext;
// Translate the context so that the contents of the layer is captuterd in the offscreen memory buffer.
sourceGraphicsContext->save();
sourceGraphicsContext->translate(-m_paintOffset.x(), -m_paintOffset.y());
sourceGraphicsContext->clearRect(m_repaintRect);
sourceGraphicsContext->clip(m_repaintRect);
return sourceGraphicsContext;
}
bool RenderSVGResourceFilter::applyResource(RenderObject* object, RenderStyle*, GraphicsContext*& context, unsigned short resourceMode)
{
ASSERT(object);
ASSERT(context);
#ifndef NDEBUG
ASSERT(resourceMode == ApplyToDefaultMode);
#else
UNUSED_PARAM(resourceMode);
#endif
// Returning false here, to avoid drawings onto the context. We just want to
// draw the stored filter output, not the unfiltered object as well.
if (m_filter.contains(object)) {
FilterData* filterData = m_filter.get(object);
if (filterData->builded)
return false;
delete m_filter.take(object); // Oops, have to rebuild, go through normal code path
}
OwnPtr<FilterData> filterData(new FilterData);
filterData->builder = buildPrimitives();
if (!filterData->builder)
return false;
FloatRect paintRect = object->strokeBoundingBox();
// Calculate the scale factor for the use of filterRes.
// Also see http://www.w3.org/TR/SVG/filters.html#FilterEffectsRegion
SVGFilterElement* filterElement = static_cast<SVGFilterElement*>(node());
filterData->boundaries = filterElement->filterBoundingBox(object->objectBoundingBox());
if (filterData->boundaries.isEmpty())
return false;
FloatSize scale(1.0f, 1.0f);
if (filterElement->hasAttribute(SVGNames::filterResAttr)) {
scale.setWidth(filterElement->filterResX() / filterData->boundaries.width());
scale.setHeight(filterElement->filterResY() / filterData->boundaries.height());
}
if (scale.isEmpty())
return false;
// clip sourceImage to filterRegion
FloatRect clippedSourceRect = paintRect;
clippedSourceRect.intersect(filterData->boundaries);
// scale filter size to filterRes
FloatRect tempSourceRect = clippedSourceRect;
// scale to big sourceImage size to kMaxFilterSize
tempSourceRect.scale(scale.width(), scale.height());
fitsInMaximumImageSize(tempSourceRect.size(), scale);
// prepare Filters
bool primitiveBoundingBoxMode = filterElement->primitiveUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
filterData->filter = SVGFilter::create(paintRect, filterData->boundaries, primitiveBoundingBoxMode);
filterData->filter->setFilterResolution(scale);
FilterEffect* lastEffect = filterData->builder->lastEffect();
if (!lastEffect)
return false;
lastEffect->calculateEffectRect(filterData->filter.get());
// At least one FilterEffect has a too big image size,
// recalculate the effect sizes with new scale factors.
if (!fitsInMaximumImageSize(filterData->filter->maxImageSize(), scale)) {
filterData->filter->setFilterResolution(scale);
lastEffect->calculateEffectRect(filterData->filter.get());
}
clippedSourceRect.scale(scale.width(), scale.height());
// Draw the content of the current element and it's childs to a imageBuffer to get the SourceGraphic.
// The size of the SourceGraphic is clipped to the size of the filterRegion.
IntRect bufferRect = enclosingIntRect(clippedSourceRect);
OwnPtr<ImageBuffer> sourceGraphic(ImageBuffer::create(bufferRect.size(), LinearRGB));
if (!sourceGraphic.get())
return false;
GraphicsContext* sourceGraphicContext = sourceGraphic->context();
sourceGraphicContext->translate(-clippedSourceRect.x(), -clippedSourceRect.y());
sourceGraphicContext->scale(scale);
sourceGraphicContext->clearRect(FloatRect(FloatPoint(), paintRect.size()));
filterData->sourceGraphicBuffer = sourceGraphic.release();
filterData->savedContext = context;
context = sourceGraphicContext;
ASSERT(!m_filter.contains(object));
m_filter.set(object, filterData.leakPtr());
return true;
}
void ShadowBlur::drawRectShadowWithTiling(GraphicsContext* graphicsContext, const FloatRect& shadowedRect, const RoundedIntRect::Radii& radii, const IntSize& shadowTemplateSize)
{
const float roundedRadius = ceilf(m_blurRadius);
const float twiceRadius = roundedRadius * 2;
// Size of the tiling side.
const int templateSideLength = 1;
m_layerImage = ScratchBuffer::shared().getScratchBuffer(shadowTemplateSize);
// Draw shadow into a new ImageBuffer.
GraphicsContext* shadowContext = m_layerImage->context();
shadowContext->save();
shadowContext->clearRect(FloatRect(0, 0, shadowTemplateSize.width(), shadowTemplateSize.height()));
// Draw the rectangle.
FloatRect templateRect = FloatRect(roundedRadius, roundedRadius, shadowTemplateSize.width() - twiceRadius, shadowTemplateSize.height() - twiceRadius);
Path path;
path.addRoundedRect(templateRect, radii.topLeft(), radii.topRight(), radii.bottomLeft(), radii.bottomRight());
shadowContext->setFillColor(Color(.0f, .0f, .0f, 1.f), ColorSpaceDeviceRGB);
shadowContext->fillPath(path);
// Blur the image.
{
IntRect blurRect(IntPoint(), shadowTemplateSize);
RefPtr<ByteArray> layerData = m_layerImage->getUnmultipliedImageData(blurRect);
blurLayerImage(layerData->data(), blurRect.size(), blurRect.width() * 4);
m_layerImage->putUnmultipliedImageData(layerData.get(), blurRect.size(), blurRect, IntPoint());
}
// Mask the image with the shadow color.
shadowContext->setCompositeOperation(CompositeSourceIn);
shadowContext->setFillColor(m_color, m_colorSpace);
shadowContext->fillRect(FloatRect(0, 0, shadowTemplateSize.width(), shadowTemplateSize.height()));
shadowContext->restore();
FloatRect shadowRect = shadowedRect;
shadowRect.inflate(roundedRadius); // FIXME: duplicating code with calculateLayerBoundingRect.
shadowRect.move(m_offset.width(), m_offset.height());
// Fill the internal part of the shadow.
shadowRect.inflate(-twiceRadius);
if (!shadowRect.isEmpty()) {
graphicsContext->save();
path.clear();
path.addRoundedRect(shadowRect, radii.topLeft(), radii.topRight(), radii.bottomLeft(), radii.bottomRight());
graphicsContext->setFillColor(m_color, m_colorSpace);
graphicsContext->fillPath(path);
graphicsContext->restore();
}
shadowRect.inflate(twiceRadius);
// Note that drawing the ImageBuffer is faster than creating a Image and drawing that,
// because ImageBuffer::draw() knows that it doesn't have to copy the image bits.
// Draw top side.
FloatRect tileRect = FloatRect(twiceRadius + radii.topLeft().width(), 0, templateSideLength, twiceRadius);
FloatRect destRect = tileRect;
destRect.move(shadowRect.x(), shadowRect.y());
destRect.setWidth(shadowRect.width() - radii.topLeft().width() - radii.topRight().width() - roundedRadius * 4);
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the bottom side.
tileRect = FloatRect(twiceRadius + radii.bottomLeft().width(), shadowTemplateSize.height() - twiceRadius, templateSideLength, twiceRadius);
destRect = tileRect;
destRect.move(shadowRect.x(), shadowRect.y() + twiceRadius + shadowedRect.height() - shadowTemplateSize.height());
destRect.setWidth(shadowRect.width() - radii.bottomLeft().width() - radii.bottomRight().width() - roundedRadius * 4);
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the right side.
tileRect = FloatRect(shadowTemplateSize.width() - twiceRadius, twiceRadius + radii.topRight().height(), twiceRadius, templateSideLength);
destRect = tileRect;
destRect.move(shadowRect.x() + twiceRadius + shadowedRect.width() - shadowTemplateSize.width(), shadowRect.y());
destRect.setHeight(shadowRect.height() - radii.topRight().height() - radii.bottomRight().height() - roundedRadius * 4);
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the left side.
tileRect = FloatRect(0, twiceRadius + radii.topLeft().height(), twiceRadius, templateSideLength);
destRect = tileRect;
destRect.move(shadowRect.x(), shadowRect.y());
destRect.setHeight(shadowRect.height() - radii.topLeft().height() - radii.bottomLeft().height() - roundedRadius * 4);
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the top left corner.
tileRect = FloatRect(0, 0, twiceRadius + radii.topLeft().width(), twiceRadius + radii.topLeft().height());
destRect = tileRect;
destRect.move(shadowRect.x(), shadowRect.y());
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the top right corner.
tileRect = FloatRect(shadowTemplateSize.width() - twiceRadius - radii.topRight().width(), 0, twiceRadius + radii.topRight().width(),
twiceRadius + radii.topRight().height());
destRect = tileRect;
destRect.move(shadowRect.x() + shadowedRect.width() - shadowTemplateSize.width() + twiceRadius, shadowRect.y());
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the bottom right corner.
tileRect = FloatRect(shadowTemplateSize.width() - twiceRadius - radii.bottomRight().width(),
shadowTemplateSize.height() - twiceRadius - radii.bottomRight().height(),
twiceRadius + radii.bottomRight().width(), twiceRadius + radii.bottomRight().height());
destRect = tileRect;
destRect.move(shadowRect.x() + shadowedRect.width() - shadowTemplateSize.width() + twiceRadius,
shadowRect.y() + shadowedRect.height() - shadowTemplateSize.height() + twiceRadius);
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
// Draw the bottom left corner.
tileRect = FloatRect(0, shadowTemplateSize.height() - twiceRadius - radii.bottomLeft().height(),
twiceRadius + radii.bottomLeft().width(), twiceRadius + radii.bottomLeft().height());
destRect = tileRect;
destRect.move(shadowRect.x(), shadowRect.y() + shadowedRect.height() - shadowTemplateSize.height() + twiceRadius);
graphicsContext->drawImageBuffer(m_layerImage, ColorSpaceDeviceRGB, destRect, tileRect);
m_layerImage = 0;
// Schedule a purge of the scratch buffer.
ScratchBuffer::shared().scheduleScratchBufferPurge();
}
bool SVGResourceFilter::prepareFilter(GraphicsContext*& context, const RenderObject* object)
{
m_ownerElement->buildFilter(object->objectBoundingBox());
const SVGRenderBase* renderer = object->toSVGRenderBase();
if (!renderer)
return false;
FloatRect paintRect = renderer->strokeBoundingBox();
paintRect.unite(renderer->markerBoundingBox());
if (shouldProcessFilter(this, m_filterBBox))
return false;
// clip sourceImage to filterRegion
FloatRect clippedSourceRect = paintRect;
clippedSourceRect.intersect(m_filterBBox);
// scale filter size to filterRes
FloatRect tempSourceRect = clippedSourceRect;
if (m_filterRes) {
m_scaleX = m_filterResSize.width() / m_filterBBox.width();
m_scaleY = m_filterResSize.height() / m_filterBBox.height();
}
// scale to big sourceImage size to kMaxFilterSize
tempSourceRect.scale(m_scaleX, m_scaleY);
fitsInMaximumImageSize(tempSourceRect.size());
// prepare Filters
m_filter = SVGFilter::create(paintRect, m_filterBBox, m_effectBBoxMode);
m_filter->setFilterResolution(FloatSize(m_scaleX, m_scaleY));
FilterEffect* lastEffect = m_filterBuilder->lastEffect();
if (lastEffect) {
lastEffect->calculateEffectRect(m_filter.get());
// at least one FilterEffect has a too big image size,
// recalculate the effect sizes with new scale factors
if (!fitsInMaximumImageSize(m_filter->maxImageSize())) {
m_filter->setFilterResolution(FloatSize(m_scaleX, m_scaleY));
lastEffect->calculateEffectRect(m_filter.get());
}
} else
return false;
clippedSourceRect.scale(m_scaleX, m_scaleY);
// Draw the content of the current element and it's childs to a imageBuffer to get the SourceGraphic.
// The size of the SourceGraphic is clipped to the size of the filterRegion.
IntRect bufferRect = enclosingIntRect(clippedSourceRect);
OwnPtr<ImageBuffer> sourceGraphic(ImageBuffer::create(bufferRect.size(), LinearRGB));
if (!sourceGraphic.get())
return false;
GraphicsContext* sourceGraphicContext = sourceGraphic->context();
sourceGraphicContext->translate(-clippedSourceRect.x(), -clippedSourceRect.y());
sourceGraphicContext->scale(FloatSize(m_scaleX, m_scaleY));
sourceGraphicContext->clearRect(FloatRect(FloatPoint(), paintRect.size()));
m_sourceGraphicBuffer.set(sourceGraphic.release());
m_savedContext = context;
context = sourceGraphicContext;
return true;
}
void ClearRect::apply(GraphicsContext& context) const
{
context.clearRect(m_rect);
}
bool RenderSVGResourceFilter::applyResource(RenderObject* object, RenderStyle*, GraphicsContext*& context, unsigned short resourceMode)
{
ASSERT(object);
ASSERT(context);
ASSERT_UNUSED(resourceMode, resourceMode == ApplyToDefaultMode);
// Returning false here, to avoid drawings onto the context. We just want to
// draw the stored filter output, not the unfiltered object as well.
if (m_filter.contains(object)) {
FilterData* filterData = m_filter.get(object);
if (filterData->builded)
return false;
delete m_filter.take(object); // Oops, have to rebuild, go through normal code path
}
OwnPtr<FilterData> filterData(adoptPtr(new FilterData));
FloatRect targetBoundingBox = object->objectBoundingBox();
SVGFilterElement* filterElement = static_cast<SVGFilterElement*>(node());
filterData->boundaries = SVGLengthContext::resolveRectangle<SVGFilterElement>(filterElement, filterElement->filterUnits(), targetBoundingBox);
if (filterData->boundaries.isEmpty())
return false;
// Determine absolute transformation matrix for filter.
AffineTransform absoluteTransform;
SVGImageBufferTools::calculateTransformationToOutermostSVGCoordinateSystem(object, absoluteTransform);
if (!absoluteTransform.isInvertible())
return false;
// Eliminate shear of the absolute transformation matrix, to be able to produce unsheared tile images for feTile.
filterData->shearFreeAbsoluteTransform = AffineTransform(absoluteTransform.xScale(), 0, 0, absoluteTransform.yScale(), 0, 0);
// Determine absolute boundaries of the filter and the drawing region.
FloatRect absoluteFilterBoundaries = filterData->shearFreeAbsoluteTransform.mapRect(filterData->boundaries);
FloatRect drawingRegion = object->strokeBoundingBox();
drawingRegion.intersect(filterData->boundaries);
FloatRect absoluteDrawingRegion = filterData->shearFreeAbsoluteTransform.mapRect(drawingRegion);
// Create the SVGFilter object.
bool primitiveBoundingBoxMode = filterElement->primitiveUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
filterData->filter = SVGFilter::create(filterData->shearFreeAbsoluteTransform, absoluteDrawingRegion, targetBoundingBox, filterData->boundaries, primitiveBoundingBoxMode);
// Create all relevant filter primitives.
filterData->builder = buildPrimitives(filterData->filter.get());
if (!filterData->builder)
return false;
// Calculate the scale factor for the use of filterRes.
// Also see http://www.w3.org/TR/SVG/filters.html#FilterEffectsRegion
FloatSize scale(1, 1);
if (filterElement->hasAttribute(SVGNames::filterResAttr)) {
scale.setWidth(filterElement->filterResX() / absoluteFilterBoundaries.width());
scale.setHeight(filterElement->filterResY() / absoluteFilterBoundaries.height());
}
if (scale.isEmpty())
return false;
// Determine scale factor for filter. The size of intermediate ImageBuffers shouldn't be bigger than kMaxFilterSize.
FloatRect tempSourceRect = absoluteDrawingRegion;
tempSourceRect.scale(scale.width(), scale.height());
fitsInMaximumImageSize(tempSourceRect.size(), scale);
// Set the scale level in SVGFilter.
filterData->filter->setFilterResolution(scale);
FilterEffect* lastEffect = filterData->builder->lastEffect();
if (!lastEffect)
return false;
RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(lastEffect);
FloatRect subRegion = lastEffect->maxEffectRect();
// At least one FilterEffect has a too big image size,
// recalculate the effect sizes with new scale factors.
if (!fitsInMaximumImageSize(subRegion.size(), scale)) {
filterData->filter->setFilterResolution(scale);
RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(lastEffect);
}
// If the drawingRegion is empty, we have something like <g filter=".."/>.
// Even if the target objectBoundingBox() is empty, we still have to draw the last effect result image in postApplyResource.
if (drawingRegion.isEmpty()) {
ASSERT(!m_filter.contains(object));
filterData->savedContext = context;
m_filter.set(object, filterData.leakPtr());
return false;
}
absoluteDrawingRegion.scale(scale.width(), scale.height());
OwnPtr<ImageBuffer> sourceGraphic;
if (!SVGImageBufferTools::createImageBuffer(absoluteDrawingRegion, absoluteDrawingRegion, sourceGraphic, ColorSpaceLinearRGB)) {
ASSERT(!m_filter.contains(object));
filterData->savedContext = context;
m_filter.set(object, filterData.leakPtr());
return false;
}
GraphicsContext* sourceGraphicContext = sourceGraphic->context();
ASSERT(sourceGraphicContext);
sourceGraphicContext->translate(-absoluteDrawingRegion.x(), -absoluteDrawingRegion.y());
if (scale.width() != 1 || scale.height() != 1)
sourceGraphicContext->scale(scale);
sourceGraphicContext->concatCTM(filterData->shearFreeAbsoluteTransform);
sourceGraphicContext->clearRect(FloatRect(FloatPoint(), absoluteDrawingRegion.size()));
filterData->sourceGraphicBuffer = sourceGraphic.release();
filterData->savedContext = context;
context = sourceGraphicContext;
ASSERT(!m_filter.contains(object));
m_filter.set(object, filterData.leakPtr());
return true;
}