bool SVGFETurbulenceElement::build(FilterBuilder* builder)
{
RefPtr<FilterEffect> addedEffect = FETurbulence::create(static_cast<TurbulanceType> (type()), baseFrequencyX(),
baseFrequencyY(), numOctaves(), seed(), stitchTiles() == SVG_STITCHTYPE_STITCH);
builder->add(result(), addedEffect.release());
return true;
}
sk_sp<SkShader> FETurbulence::createShader() const
{
const SkISize size = SkISize::Make(effectBoundaries().width(), effectBoundaries().height());
// Frequency should be scaled by page zoom, but not by primitiveUnits.
// So we apply only the transform scale (as Filter::apply*Scale() do)
// and not the target bounding box scale (as SVGFilter::apply*Scale()
// would do). Note also that we divide by the scale since this is
// a frequency, not a period.
float baseFrequencyX = m_baseFrequencyX / getFilter()->scale();
float baseFrequencyY = m_baseFrequencyY / getFilter()->scale();
return (type() == FETURBULENCE_TYPE_FRACTALNOISE) ?
SkPerlinNoiseShader::MakeFractalNoise(SkFloatToScalar(baseFrequencyX),
SkFloatToScalar(baseFrequencyY), numOctaves(), SkFloatToScalar(seed()),
stitchTiles() ? &size : 0) :
SkPerlinNoiseShader::MakeTurbulence(SkFloatToScalar(baseFrequencyX),
SkFloatToScalar(baseFrequencyY), numOctaves(), SkFloatToScalar(seed()),
stitchTiles() ? &size : 0);
}
TextStream& FETurbulence::externalRepresentation(TextStream& ts, int indent) const
{
writeIndent(ts, indent);
ts << "[feTurbulence";
FilterEffect::externalRepresentation(ts);
ts << " type=\"" << type() << "\" "
<< "baseFrequency=\"" << baseFrequencyX() << ", " << baseFrequencyY() << "\" "
<< "seed=\"" << seed() << "\" "
<< "numOctaves=\"" << numOctaves() << "\" "
<< "stitchTiles=\"" << stitchTiles() << "\"]\n";
return ts;
}
TextStream& SVGFETurbulence::externalRepresentation(TextStream& ts) const
{
ts << "[type=TURBULENCE] ";
SVGFilterEffect::externalRepresentation(ts);
ts << " [turbulence type=" << type() << "]"
<< " [base frequency x=" << baseFrequencyX() << " y=" << baseFrequencyY() << "]"
<< " [seed=" << seed() << "]"
<< " [num octaves=" << numOctaves() << "]"
<< " [stitch tiles=" << stitchTiles() << "]";
return ts;
}
PassRefPtr<FilterEffect> SVGFETurbulenceElement::build(SVGFilterBuilder*)
{
return FETurbulence::create(static_cast<TurbulanceType>(type()), baseFrequencyX(),
baseFrequencyY(), numOctaves(), seed(), stitchTiles() == SVG_STITCHTYPE_STITCH);
}