PassRefPtr<SkImageFilter> FEImage::createImageFilter(SkiaImageFilterBuilder* builder)
{
RenderObject* renderer = referencedRenderer();
if (!m_image && !renderer)
return adoptRef(SkBitmapSource::Create(SkBitmap()));
setOperatingColorSpace(ColorSpaceDeviceRGB);
if (renderer)
return createImageFilterForRenderer(renderer, builder);
FloatRect srcRect = FloatRect(FloatPoint(), m_image->size());
FloatRect dstRect = filterPrimitiveSubregion();
// FIXME: CSS image filters currently do not seem to set filter primitive
// subregion correctly if unspecified. So default to srcRect size if so.
if (dstRect.isEmpty())
dstRect = srcRect;
m_preserveAspectRatio->transformRect(dstRect, srcRect);
if (!m_image->nativeImageForCurrentFrame())
return adoptRef(SkBitmapSource::Create(SkBitmap()));
RefPtr<SkImageFilter> result = adoptRef(SkBitmapSource::Create(m_image->nativeImageForCurrentFrame()->bitmap(), srcRect, dstRect));
return result.release();
}
TextStream& FEImage::externalRepresentation(TextStream& ts, int indent) const
{
FloatSize imageSize;
if (m_image)
imageSize = m_image->size();
else if (RenderObject* renderer = referencedRenderer())
imageSize = enclosingIntRect(renderer->repaintRectInLocalCoordinates()).size();
writeIndent(ts, indent);
ts << "[feImage";
FilterEffect::externalRepresentation(ts);
ts << " image-size=\"" << imageSize.width() << "x" << imageSize.height() << "\"]\n";
// FIXME: should this dump also object returned by SVGFEImage::image() ?
return ts;
}
void FEImage::platformApplySoftware()
{
RenderObject* renderer = referencedRenderer();
if (!m_image && !renderer)
return;
ImageBuffer* resultImage = createImageBufferResult();
if (!resultImage)
return;
SVGFilter* svgFilter = static_cast<SVGFilter*>(filter());
FloatRect destRect = svgFilter->absoluteTransform().mapRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (renderer)
srcRect = svgFilter->absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates());
else {
srcRect = FloatRect(FloatPoint(), m_image->size());
m_preserveAspectRatio.transformRect(destRect, srcRect);
}
IntPoint paintLocation = absolutePaintRect().location();
destRect.move(-paintLocation.x(), -paintLocation.y());
// FEImage results are always in ColorSpaceDeviceRGB
setResultColorSpace(ColorSpaceDeviceRGB);
if (renderer) {
const AffineTransform& absoluteTransform = svgFilter->absoluteTransform();
resultImage->context()->concatCTM(absoluteTransform);
SVGElement* contextNode = static_cast<SVGElement*>(renderer->node());
if (contextNode->isStyled() && static_cast<SVGStyledElement*>(contextNode)->hasRelativeLengths()) {
SVGLengthContext lengthContext(contextNode);
float width = 0;
float height = 0;
// If we're referencing an element with percentage units, eg. <rect with="30%"> those values were resolved against the viewport.
// Build up a transformation that maps from the viewport space to the filter primitive subregion.
if (lengthContext.determineViewport(width, height))
resultImage->context()->concatCTM(makeMapBetweenRects(FloatRect(0, 0, width, height), destRect));
}
AffineTransform contentTransformation;
SVGRenderingContext::renderSubtreeToImageBuffer(resultImage, renderer, contentTransformation);
return;
}
resultImage->context()->drawImage(m_image.get(), ColorSpaceDeviceRGB, destRect, srcRect);
}
void FEImage::determineAbsolutePaintRect()
{
FloatRect paintRect = filter().absoluteTransform().mapRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (m_image) {
srcRect.setSize(m_image->size());
m_preserveAspectRatio.transformRect(paintRect, srcRect);
} else if (RenderElement* renderer = referencedRenderer())
srcRect = filter().absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates());
if (clipsToBounds())
paintRect.intersect(maxEffectRect());
else
paintRect.unite(maxEffectRect());
setAbsolutePaintRect(enclosingIntRect(paintRect));
}
void FEImage::applySoftware()
{
RenderObject* renderer = referencedRenderer();
if (!m_image && !renderer)
return;
ImageBuffer* resultImage = createImageBufferResult();
if (!resultImage)
return;
IntPoint paintLocation = absolutePaintRect().location();
resultImage->context()->translate(-paintLocation.x(), -paintLocation.y());
// FEImage results are always in ColorSpaceDeviceRGB
setResultColorSpace(ColorSpaceDeviceRGB);
FloatRect destRect = filter()->mapLocalRectToAbsoluteRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (!renderer) {
srcRect = FloatRect(FloatPoint(), m_image->size());
m_preserveAspectRatio->transformRect(destRect, srcRect);
resultImage->context()->drawImage(m_image.get(), destRect, srcRect);
return;
}
SVGElement* contextNode = toSVGElement(renderer->node());
if (contextNode->hasRelativeLengths()) {
// FIXME: This fixes relative lengths but breaks non-relative ones (see crbug/260709).
SVGLengthContext lengthContext(contextNode);
FloatSize viewportSize;
// If we're referencing an element with percentage units, eg. <rect with="30%"> those values were resolved against the viewport.
// Build up a transformation that maps from the viewport space to the filter primitive subregion.
if (lengthContext.determineViewport(viewportSize))
resultImage->context()->concatCTM(makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect));
} else {
resultImage->context()->translate(destRect.x(), destRect.y());
resultImage->context()->concatCTM(filter()->absoluteTransform());
}
AffineTransform contentTransformation;
SVGRenderingContext::renderSubtree(resultImage->context(), renderer, contentTransformation);
}
FloatRect FEImage::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
RenderObject* renderer = referencedRenderer();
if (!m_image && !renderer)
return FloatRect();
FloatRect requestedRect = originalRequestedRect;
if (clipsToBounds())
requestedRect.intersect(maxEffectRect());
FloatRect destRect = filter()->mapLocalRectToAbsoluteRect(filterPrimitiveSubregion());
FloatRect srcRect;
if (renderer) {
srcRect = getRendererRepaintRect(renderer);
SVGElement* contextNode = toSVGElement(renderer->node());
if (contextNode->hasRelativeLengths()) {
// FIXME: This fixes relative lengths but breaks non-relative ones (see crbug/260709).
SVGLengthContext lengthContext(contextNode);
FloatSize viewportSize;
if (lengthContext.determineViewport(viewportSize)) {
srcRect = makeMapBetweenRects(FloatRect(FloatPoint(), viewportSize), destRect).mapRect(srcRect);
}
} else {
srcRect = filter()->mapLocalRectToAbsoluteRect(srcRect);
srcRect.move(destRect.x(), destRect.y());
}
destRect.intersect(srcRect);
} else {
srcRect = FloatRect(FloatPoint(), m_image->size());
m_preserveAspectRatio->transformRect(destRect, srcRect);
}
destRect.intersect(requestedRect);
addAbsolutePaintRect(destRect);
return destRect;
}