void FEGaussianBlur::apply(Filter* filter)
{
m_in->apply(filter);
if (!m_in->resultImage())
return;
if (!getEffectContext())
return;
setIsAlphaImage(m_in->isAlphaImage());
if (m_x == 0 || m_y == 0)
return;
unsigned sdx = static_cast<unsigned>(floor(m_x * 3 * sqrt(2 * M_PI) / 4.f + 0.5f));
unsigned sdy = static_cast<unsigned>(floor(m_y * 3 * sqrt(2 * M_PI) / 4.f + 0.5f));
IntRect effectDrawingRect = calculateDrawingIntRect(m_in->subRegion());
RefPtr<ImageData> srcImageData(m_in->resultImage()->getPremultipliedImageData(effectDrawingRect));
CanvasPixelArray* srcPixelArray(srcImageData->data());
IntRect imageRect(IntPoint(), resultImage()->size());
RefPtr<ImageData> tmpImageData = ImageData::create(imageRect.width(), imageRect.height());
CanvasPixelArray* tmpPixelArray(tmpImageData->data());
int stride = 4 * imageRect.width();
for (int i = 0; i < 3; ++i) {
boxBlur(srcPixelArray, tmpPixelArray, sdx, 4, stride, imageRect.width(), imageRect.height(), isAlphaImage());
boxBlur(tmpPixelArray, srcPixelArray, sdy, stride, 4, imageRect.height(), imageRect.width(), isAlphaImage());
}
resultImage()->putPremultipliedImageData(srcImageData.get(), imageRect, IntPoint());
}
void FELighting::apply(Filter* filter)
{
m_in->apply(filter);
if (!m_in->resultImage())
return;
if (!getEffectContext())
return;
setIsAlphaImage(false);
IntRect effectDrawingRect = calculateDrawingIntRect(m_in->scaledSubRegion());
RefPtr<ImageData> srcImageData(m_in->resultImage()->getUnmultipliedImageData(effectDrawingRect));
CanvasPixelArray* srcPixelArray(srcImageData->data());
// FIXME: support kernelUnitLengths other than (1,1). The issue here is that the W3
// standard has no test case for them, and other browsers (like Firefox) has strange
// output for various kernelUnitLengths, and I am not sure they are reliable.
// Anyway, feConvolveMatrix should also use the implementation
if (drawLighting(srcPixelArray, effectDrawingRect.width(), effectDrawingRect.height()))
resultImage()->putUnmultipliedImageData(srcImageData.get(), IntRect(IntPoint(), resultImage()->size()), IntPoint());
}
