void
SVGFEGaussianBlurElement::GaussianBlur(const Image* aSource,
const Image* aTarget,
const nsIntRect& aDataRect,
uint32_t aDX, uint32_t aDY)
{
NS_ASSERTION(nsIntRect(0, 0, aTarget->mImage->Width(), aTarget->mImage->Height()).Contains(aDataRect),
"aDataRect out of bounds");
nsAutoArrayPtr<uint8_t> tmp(new uint8_t[aTarget->mImage->GetDataSize()]);
if (!tmp)
return;
memset(tmp, 0, aTarget->mImage->GetDataSize());
bool alphaOnly = AreAllColorChannelsZero(aTarget);
const uint8_t* sourceData = aSource->mImage->Data();
uint8_t* targetData = aTarget->mImage->Data();
uint32_t stride = aTarget->mImage->Stride();
if (aDX == 0) {
CopyDataRect(tmp, sourceData, stride, aDataRect);
} else {
int32_t longLobe = aDX/2;
int32_t shortLobe = (aDX & 1) ? longLobe : longLobe - 1;
for (int32_t major = aDataRect.y; major < aDataRect.YMost(); ++major) {
int32_t ms = major*stride;
BoxBlur(sourceData + ms, tmp + ms, 4, aDataRect.x, aDataRect.XMost(), longLobe, shortLobe, alphaOnly);
BoxBlur(tmp + ms, targetData + ms, 4, aDataRect.x, aDataRect.XMost(), shortLobe, longLobe, alphaOnly);
BoxBlur(targetData + ms, tmp + ms, 4, aDataRect.x, aDataRect.XMost(), longLobe, longLobe, alphaOnly);
}
}
if (aDY == 0) {
CopyDataRect(targetData, tmp, stride, aDataRect);
} else {
int32_t longLobe = aDY/2;
int32_t shortLobe = (aDY & 1) ? longLobe : longLobe - 1;
for (int32_t major = aDataRect.x; major < aDataRect.XMost(); ++major) {
int32_t ms = major*4;
BoxBlur(tmp + ms, targetData + ms, stride, aDataRect.y, aDataRect.YMost(), longLobe, shortLobe, alphaOnly);
BoxBlur(targetData + ms, tmp + ms, stride, aDataRect.y, aDataRect.YMost(), shortLobe, longLobe, alphaOnly);
BoxBlur(tmp + ms, targetData + ms, stride, aDataRect.y, aDataRect.YMost(), longLobe, longLobe, alphaOnly);
}
}
}
void main() { \
FragColor = BoxBlur(); \
}";
void OuterGlowStyle::operator() (Pixels destPixels, Pixels stencilPixels)
{
if (!active)
return;
//int const width = stencilPixels.getWidth ();
//int const height = stencilPixels.getHeight ();
SharedTable <Colour> table = colours.createLookupTable ();
Map2D <int> dist (stencilPixels.getWidth (), stencilPixels.getHeight ());
Map2D <int> temp (stencilPixels.getWidth (), stencilPixels.getHeight ());
if (precise)
{
LayerStyles::DistanceMap () (
Pixels::Map2D (stencilPixels),
temp,
stencilPixels.getWidth (),
stencilPixels.getHeight (),
size);
#if 0
DistanceTransform::Meijster::calculateAntiAliased (
RenderPixelAntiAliased (
destPixels,
opacity,
spread,
size,
table),
GetMask (stencilPixels),
stencilPixels.getWidth (),
stencilPixels.getHeight (),
DistanceTransform::Meijster::EuclideanMetric ());
#endif
for (int y = 0; y < temp.getRows (); ++y)
{
for (int x = 0; x < temp.getCols (); ++x)
{
int const v = temp (x, y);
if (v > 0)
temp (x, y) = (255 - v) * 256;
}
}
}
else
{
// "Softer"
LayerStyles::BoxBlurAndDilateSettings bd (size, spread);
LayerStyles::GrayscaleDilation () (
Pixels::Map2D (stencilPixels),
stencilPixels.getWidth (),
stencilPixels.getHeight (),
dist,
stencilPixels.getWidth (),
stencilPixels.getHeight (),
0,
0,
bd.getDilatePixels ());
BoxBlur () (dist, temp, temp.getCols (), temp.getRows (), bd.getBoxBlurRadius ());
}
// Fill
//
PixelARGB c (0);
for (int y = 0; y < temp.getRows (); ++y)
{
for (int x = 0; x < temp.getCols (); ++x)
{
int const v = (temp (x, y) + 128) / 256;
PixelRGB& dest (*((PixelRGB*)destPixels.getPixelPointer (x, y)));
c.setAlpha (uint8(v));
dest.blend (c);
}
}
}
