Ref<TransformOperation> PerspectiveTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
{
if (from && !from->isSameType(*this))
return *this;
if (blendToIdentity) {
double p = floatValueForLength(m_p, 1);
p = WebCore::blend(p, 1.0, progress); // FIXME: this seems wrong. https://bugs.webkit.org/show_bug.cgi?id=52700
return PerspectiveTransformOperation::create(Length(clampToPositiveInteger(p), Fixed));
}
const PerspectiveTransformOperation* fromOp = downcast<PerspectiveTransformOperation>(from);
Length fromP = fromOp ? fromOp->m_p : Length(m_p.type());
Length toP = m_p;
TransformationMatrix fromT;
TransformationMatrix toT;
fromT.applyPerspective(floatValueForLength(fromP, 1));
toT.applyPerspective(floatValueForLength(toP, 1));
toT.blend(fromT, progress);
TransformationMatrix::Decomposed4Type decomp;
if (toT.decompose4(decomp)) {
if (decomp.perspectiveZ) {
double val = -1.0 / decomp.perspectiveZ;
return PerspectiveTransformOperation::create(Length(clampToPositiveInteger(val), Fixed));
}
}
return PerspectiveTransformOperation::create(Length(0, Fixed));
}
PassRefPtr<TransformOperation> PerspectiveTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
{
if (from && !from->isSameType(*this))
return this;
if (blendToIdentity) {
double p = WebCore::blend(m_p, 1., progress); // FIXME: this seems wrong. https://bugs.webkit.org/show_bug.cgi?id=52700
return PerspectiveTransformOperation::create(clampToPositiveInteger(p));
}
const PerspectiveTransformOperation* fromOp = static_cast<const PerspectiveTransformOperation*>(from);
TransformationMatrix fromT;
TransformationMatrix toT;
fromT.applyPerspective(fromOp ? fromOp->m_p : 0);
toT.applyPerspective(m_p);
toT.blend(fromT, progress);
TransformationMatrix::DecomposedType decomp;
toT.decompose(decomp);
if (decomp.perspectiveZ) {
double val = -1.0 / decomp.perspectiveZ;
return PerspectiveTransformOperation::create(clampToPositiveInteger(val));
}
return PerspectiveTransformOperation::create(0);
}
PassRefPtr<TransformOperation> PerspectiveTransformOperation::blend(const TransformOperation* from, double progress, bool blendToIdentity)
{
if (from && !from->isSameType(*this))
return this;
if (blendToIdentity)
return PerspectiveTransformOperation::create(m_p + (1. - m_p) * progress);
const PerspectiveTransformOperation* fromOp = static_cast<const PerspectiveTransformOperation*>(from);
double fromP = fromOp ? fromOp->m_p : 0;
double toP = m_p;
TransformationMatrix fromT;
TransformationMatrix toT;
fromT.applyPerspective(fromP);
toT.applyPerspective(toP);
toT.blend(fromT, progress);
TransformationMatrix::DecomposedType decomp;
toT.decompose(decomp);
return PerspectiveTransformOperation::create(decomp.perspectiveZ ? -1.0 / decomp.perspectiveZ : 0.0);
}
