WebTransformationMatrix WebTransformOperations::blend(const WebTransformOperations& from, double progress) const
{
WebTransformationMatrix toReturn;
bool fromIdentity = from.isIdentity();
bool toIdentity = isIdentity();
if (fromIdentity && toIdentity)
return toReturn;
if (matchesTypes(from)) {
size_t numOperations = max(fromIdentity ? 0 : from.m_private->operations.size(),
toIdentity ? 0 : m_private->operations.size());
for (size_t i = 0; i < numOperations; ++i) {
WebTransformationMatrix blended = blendTransformOperations(
fromIdentity ? 0 : &from.m_private->operations[i],
toIdentity ? 0 : &m_private->operations[i],
progress);
toReturn.multiply(blended);
}
} else {
toReturn = apply();
WebTransformationMatrix fromTransform = from.apply();
toReturn.blend(fromTransform, progress);
}
return toReturn;
}
bool appendKeyframeWithCustomBezierTimingFunction<TransformAnimationValue, WebTransformKeyframe, WebTransformAnimationCurve>(WebTransformAnimationCurve* curve, double keyTime, const TransformAnimationValue* value, const TransformAnimationValue* lastValue, double x1, double y1, double x2, double y2, const FloatSize& boxSize)
{
if (causesRotationOfAtLeast180Degrees(value, lastValue))
return false;
WebTransformOperations operations = toWebTransformOperations(*value->value(), boxSize);
if (operations.apply().isInvertible()) {
curve->add(WebTransformKeyframe(keyTime, operations), x1, y1, x2, y2);
return true;
}
return false;
}
bool appendKeyframeWithStandardTimingFunction<TransformAnimationValue, WebTransformKeyframe, WebTransformAnimationCurve>(WebTransformAnimationCurve* curve, double keyTime, const TransformAnimationValue* value, const TransformAnimationValue* lastValue, WebKit::WebAnimationCurve::TimingFunctionType timingFunctionType, const FloatSize& boxSize)
{
if (causesRotationOfAtLeast180Degrees(value, lastValue))
return false;
WebTransformOperations operations = toWebTransformOperations(*value->value(), boxSize);
if (operations.apply().isInvertible()) {
curve->add(WebTransformKeyframe(keyTime, operations), timingFunctionType);
return true;
}
return false;
}
