FloatRect FilterEffect::determineAbsolutePaintRect(const FloatRect& originalRequestedRect)
{
FloatRect requestedRect = originalRequestedRect;
// Filters in SVG clip to primitive subregion, while CSS doesn't.
if (m_clipsToBounds)
requestedRect.intersect(maxEffectRect());
// We may be called multiple times if result is used more than once. Return
// quickly if if nothing new is required.
if (absolutePaintRect().contains(enclosingIntRect(requestedRect)))
return requestedRect;
FloatRect inputRect = mapPaintRect(requestedRect, false);
FloatRect inputUnion;
unsigned size = m_inputEffects.size();
for (unsigned i = 0; i < size; ++i)
inputUnion.unite(m_inputEffects.at(i)->determineAbsolutePaintRect(inputRect));
inputUnion = mapPaintRect(inputUnion, true);
if (affectsTransparentPixels() || !size) {
inputUnion = requestedRect;
} else {
// Rect may have inflated. Re-intersect with request.
inputUnion.intersect(requestedRect);
}
addAbsolutePaintRect(inputUnion);
return inputUnion;
}
void FEColorMatrix::applySoftware()
{
ImageBuffer* resultImage = createImageBufferResult();
if (!resultImage)
return;
FilterEffect* in = inputEffect(0);
IntRect drawingRegion = drawingRegionOfInputImage(in->absolutePaintRect());
SkAutoTUnref<SkColorFilter> filter(createColorFilter(m_type, m_values.data()));
RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();
if (!nativeImage)
return;
SkPaint paint;
paint.setColorFilter(filter);
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
resultImage->context()->drawBitmap(nativeImage->bitmap(), drawingRegion.x(), drawingRegion.y(), &paint);
if (affectsTransparentPixels()) {
IntRect fullRect = IntRect(IntPoint(), absolutePaintRect().size());
resultImage->context()->clipOut(drawingRegion);
resultImage->context()->fillRect(fullRect, Color(m_values[4], m_values[9], m_values[14], m_values[19]));
}
return;
}
void FEComponentTransfer::applySoftware()
{
FilterEffect* in = inputEffect(0);
ImageBuffer* resultImage = createImageBufferResult();
if (!resultImage)
return;
RefPtr<Image> image = in->asImageBuffer()->copyImage(DontCopyBackingStore);
RefPtr<NativeImageSkia> nativeImage = image->nativeImageForCurrentFrame();
if (!nativeImage)
return;
unsigned char rValues[256], gValues[256], bValues[256], aValues[256];
getValues(rValues, gValues, bValues, aValues);
IntRect destRect = drawingRegionOfInputImage(in->absolutePaintRect());
SkPaint paint;
paint.setColorFilter(SkTableColorFilter::CreateARGB(aValues, rValues, gValues, bValues))->unref();
paint.setXfermodeMode(SkXfermode::kSrc_Mode);
resultImage->context()->drawBitmap(nativeImage->bitmap(), destRect.x(), destRect.y(), &paint);
if (affectsTransparentPixels()) {
IntRect fullRect = IntRect(IntPoint(), absolutePaintRect().size());
resultImage->context()->clipOut(destRect);
resultImage->context()->fillRect(fullRect, Color(rValues[0], gValues[0], bValues[0], aValues[0]));
}
}
FloatRect FilterEffect::applyBounds(const FloatRect& rect) const {
// Filters in SVG clip to primitive subregion, while CSS doesn't.
if (!clipsToBounds())
return rect;
FloatRect bounds = absoluteBounds();
if (affectsTransparentPixels())
return bounds;
return intersection(rect, bounds);
}
