nsresult
nsCSSFilterInstance::SetAttributesForDropShadow(FilterPrimitiveDescription& aDescr)
{
nsCSSShadowArray* shadows = mFilter.GetDropShadow();
if (!shadows || shadows->Length() != 1) {
NS_NOTREACHED("Exactly one drop shadow should have been parsed.");
return NS_ERROR_FAILURE;
}
nsCSSShadowItem* shadow = shadows->ShadowAt(0);
// Set drop shadow blur radius.
Size radiusInFilterSpace = BlurRadiusToFilterSpace(shadow->mRadius);
aDescr.Attributes().Set(eDropShadowStdDeviation, radiusInFilterSpace);
// Set offset.
IntPoint offsetInFilterSpace = OffsetToFilterSpace(shadow->mXOffset, shadow->mYOffset);
aDescr.Attributes().Set(eDropShadowOffset, offsetInFilterSpace);
// Set color. If unspecified, use the CSS color property.
nscolor shadowColor = shadow->mHasColor ?
shadow->mColor : mTargetFrame->StyleColor()->mColor;
aDescr.Attributes().Set(eDropShadowColor, ToAttributeColor(shadowColor));
return NS_OK;
}
nsresult
nsCSSFilterInstance::SetAttributesForSepia(FilterPrimitiveDescription& aDescr)
{
// Set color matrix type.
aDescr.Attributes().Set(eColorMatrixType, (uint32_t)SVG_FECOLORMATRIX_TYPE_SEPIA);
// Set color matrix values.
const nsStyleCoord& styleValue = mFilter.GetFilterParameter();
float value = ClampFactor(styleValue.GetFactorOrPercentValue());
aDescr.Attributes().Set(eColorMatrixValues, &value, 1);
return NS_OK;
}
nsresult
nsCSSFilterInstance::SetAttributesForHueRotate(FilterPrimitiveDescription& aDescr)
{
// Set color matrix type.
aDescr.Attributes().Set(eColorMatrixType, (uint32_t)SVG_FECOLORMATRIX_TYPE_HUE_ROTATE);
// Set color matrix values.
const nsStyleCoord& styleValue = mFilter.GetFilterParameter();
float value = styleValue.GetAngleValueInDegrees();
aDescr.Attributes().Set(eColorMatrixValues, &value, 1);
return NS_OK;
}
nsresult
nsCSSFilterInstance::SetAttributesForBlur(FilterPrimitiveDescription& aDescr)
{
const nsStyleCoord& radiusInFrameSpace = mFilter.GetFilterParameter();
if (radiusInFrameSpace.GetUnit() != eStyleUnit_Coord) {
NS_NOTREACHED("unexpected unit");
return NS_ERROR_FAILURE;
}
Size radiusInFilterSpace = BlurRadiusToFilterSpace(radiusInFrameSpace.GetCoordValue());
aDescr.Attributes().Set(eGaussianBlurStdDeviation, radiusInFilterSpace);
return NS_OK;
}
