bool Buffer::longLineIndicator() const {
return edgeMode() != EDGE_NONE;
}
PassRefPtr<FilterEffect> SVGFEConvolveMatrixElement::build(SVGFilterBuilder* filterBuilder, Filter* filter)
{
FilterEffect* input1 = filterBuilder->getEffectById(in1());
if (!input1)
return 0;
int orderXValue = orderX();
int orderYValue = orderY();
if (!hasAttribute(SVGNames::orderAttr)) {
orderXValue = 3;
orderYValue = 3;
}
SVGNumberList& kernelMatrix = this->kernelMatrix();
int kernelMatrixSize = kernelMatrix.size();
// The spec says this is a requirement, and should bail out if fails
if (orderXValue * orderYValue != kernelMatrixSize)
return 0;
int targetXValue = targetX();
int targetYValue = targetY();
if (hasAttribute(SVGNames::targetXAttr) && (targetXValue < 0 || targetXValue >= orderXValue))
return 0;
// The spec says the default value is: targetX = floor ( orderX / 2 ))
if (!hasAttribute(SVGNames::targetXAttr))
targetXValue = static_cast<int>(floorf(orderXValue / 2));
if (hasAttribute(SVGNames::targetYAttr) && (targetYValue < 0 || targetYValue >= orderYValue))
return 0;
// The spec says the default value is: targetY = floor ( orderY / 2 ))
if (!hasAttribute(SVGNames::targetYAttr))
targetYValue = static_cast<int>(floorf(orderYValue / 2));
float divisorValue = divisor();
if (hasAttribute(SVGNames::divisorAttr) && !divisorValue)
return 0;
if (!hasAttribute(SVGNames::divisorAttr)) {
for (int i = 0; i < kernelMatrixSize; ++i)
divisorValue += kernelMatrix.at(i);
if (!divisorValue)
divisorValue = 1;
}
RefPtr<FilterEffect> effect = FEConvolveMatrix::create(filter,
IntSize(orderXValue, orderYValue), divisorValue,
bias(), IntPoint(targetXValue, targetYValue), static_cast<EdgeModeType>(edgeMode()),
FloatPoint(kernelUnitLengthX(), kernelUnitLengthX()), preserveAlpha(), kernelMatrix);
effect->inputEffects().append(input1);
return effect.release();
}
