void
SVGFEMorphologyElement::GetRXY(int32_t *aRX, int32_t *aRY,
const nsSVGFilterInstance& aInstance)
{
// Subtract an epsilon here because we don't want a value that's just
// slightly larger than an integer to round up to the next integer; it's
// probably meant to be the integer it's close to, modulo machine precision
// issues.
*aRX = NSToIntCeil(aInstance.GetPrimitiveNumber(SVGContentUtils::X,
&mNumberPairAttributes[RADIUS],
nsSVGNumberPair::eFirst) -
MORPHOLOGY_EPSILON);
*aRY = NSToIntCeil(aInstance.GetPrimitiveNumber(SVGContentUtils::Y,
&mNumberPairAttributes[RADIUS],
nsSVGNumberPair::eSecond) -
MORPHOLOGY_EPSILON);
}
nsresult
SVGFEGaussianBlurElement::GetDXY(uint32_t *aDX, uint32_t *aDY,
const nsSVGFilterInstance& aInstance)
{
float stdX = aInstance.GetPrimitiveNumber(SVGContentUtils::X,
&mNumberPairAttributes[STD_DEV],
nsSVGNumberPair::eFirst);
float stdY = aInstance.GetPrimitiveNumber(SVGContentUtils::Y,
&mNumberPairAttributes[STD_DEV],
nsSVGNumberPair::eSecond);
if (stdX < 0 || stdY < 0)
return NS_ERROR_FAILURE;
// If the box size is greater than twice the temporary surface size
// in an axis, then each pixel will be set to the average of all the
// other pixel values.
*aDX = GetBlurBoxSize(stdX);
*aDY = GetBlurBoxSize(stdY);
return NS_OK;
}