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;
}
PassRefPtr<SkImageFilter> SourceAlpha::createImageFilter(SkiaImageFilterBuilder& builder)
{
RefPtr<SkImageFilter> sourceGraphic(builder.build(inputEffect(0), operatingColorSpace()));
SkScalar matrix[20] = {
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
0, 0, 0, SK_Scalar1, 0
};
RefPtr<SkColorFilter> colorFilter(adoptRef(SkColorMatrixFilter::Create(matrix)));
return adoptRef(SkColorFilterImageFilter::Create(colorFilter.get(), sourceGraphic.get()));
}
void KoShapeShadow::paint(KoShape *shape, QPainter &painter, const KoViewConverter &converter)
{
if (! d->visible)
return;
// So the approach we are taking here is to draw into a buffer image the size of boundingRect
// We offset by the shadow offset at the time we draw into the buffer
// Then we filter the image and draw it at the position of the bounding rect on canvas
//the boundingRect of the shape or the KoSelection boundingRect of the group
QRectF shadowRect = shape->boundingRect();
QRectF zoomedClipRegion = converter.documentToView(shadowRect);
// Init the buffer image
QImage sourceGraphic(zoomedClipRegion.size().toSize(), QImage::Format_ARGB32_Premultiplied);
sourceGraphic.fill(qRgba(0,0,0,0));
// Init the buffer painter
QPainter imagePainter(&sourceGraphic);
imagePainter.setPen(Qt::NoPen);
imagePainter.setBrush(Qt::NoBrush);
imagePainter.setRenderHint(QPainter::Antialiasing, painter.testRenderHint(QPainter::Antialiasing));
// Since our imagebuffer and the canvas don't align we need to offset our drawings
imagePainter.translate(-1.0f*converter.documentToView(shadowRect.topLeft()));
// Handle the shadow offset
imagePainter.translate(converter.documentToView(offset()));
KoShapeGroup *group = dynamic_cast<KoShapeGroup*>(shape);
if (group) {
d->paintGroupShadow(group, imagePainter, converter);
} else {
//apply shape's transformation
imagePainter.setTransform(shape->absoluteTransformation(&converter), true);
d->paintShadow(shape, imagePainter, converter);
}
imagePainter.end();
// Blur the shadow (well the entire buffer)
d->blurShadow(sourceGraphic, converter.documentToViewX(d->blur), d->color);
// Paint the result
painter.save();
// The painter is initialized for us with canvas transform 'plus' shape transform
// we are only interested in the canvas transform so 'subtract' the shape transform part
painter.setTransform(shape->absoluteTransformation(&converter).inverted() * painter.transform());
painter.drawImage(zoomedClipRegion.topLeft(), sourceGraphic);
painter.restore();
}
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;
}
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;
}
