https://bugs.webkit.org/show_bug.cgi?id=85051

Reviewed by Antti Koivisto.

Source/WebCore:

Repetitions are currently handled by adjusting percentage (percentage += repeatCount).
This doesn't work for <animateTransform> as each repetition has to be post-multiplied to the animated transform list. Fix that.

By-animations are equal to values="0;by" animations in SMIL. '0' is the neutral element of addition, which is the _zero_ matrix,
not the identity matrix for SVGTransform. Add a new construction mode to SVGTransform to be able to construct zero transforms.

Tests: svg/animations/animateTransform-accumulation-expected.svg
       svg/animations/animateTransform-accumulation.svg
       svg/animations/animateTransform-by-scale-expected.svg
       svg/animations/animateTransform-by-scale.svg
       svg/animations/animateTransform-from-by-from-to-comparision-expected.svg
       svg/animations/animateTransform-from-by-from-to-comparision.svg
       svg/animations/animateTransform-from-by-scale-additive-sum-expected.svg
       svg/animations/animateTransform-from-by-scale-additive-sum.svg
       svg/animations/animateTransform-from-by-scale-expected.svg
       svg/animations/animateTransform-from-by-scale.svg
       svg/animations/animateTransform-rotate-around-point-expected.svg
       svg/animations/animateTransform-rotate-around-point.svg
       svg/animations/animateTransform-skewX-expected.svg
       svg/animations/animateTransform-skewX.svg
       svg/animations/animateTransform-skewY-expected.svg
       svg/animations/animateTransform-skewY.svg
       svg/animations/animateTransform-translate-expected.svg
       svg/animations/animateTransform-translate.svg
       svg/animations/multiple-animateTransform-additive-sum-expected.svg
       svg/animations/multiple-animateTransform-additive-sum.svg

* svg/SVGAnimateTransformElement.cpp:
(WebCore::SVGAnimateTransformElement::parseAttribute):
* svg/SVGAnimatedTransformList.cpp:
(WebCore::SVGAnimatedTransformListAnimator::addAnimatedTypes):
(WebCore::SVGAnimatedTransformListAnimator::calculateAnimatedValue):
* svg/SVGAnimationElement.h:
(WebCore::SVGAnimationElement::adjustFromToListValues):
* svg/SVGTransform.cpp:
(WebCore::SVGTransform::SVGTransform):
* svg/SVGTransform.h:
* svg/SVGTransformDistance.cpp:
(WebCore::SVGTransformDistance::SVGTransformDistance):
(WebCore::SVGTransformDistance::scaledDistance):
(WebCore::SVGTransformDistance::addSVGTransforms):
(WebCore::SVGTransformDistance::addToSVGTransform):
(WebCore::SVGTransformDistance::distance):
* svg/SVGTransformDistance.h:
(SVGTransformDistance):

LayoutTests:

Enable <animateTransform> test in additive-type-by-animation, which was disabled as it triggered assertions before this patch.
Add lots of new <animateTransform> covering additive/accumulative animations using reftests, for all animateTransform types (translate/rotate/skewX/skewY/scale).

* svg/animations/additive-type-by-animation-expected.txt:
* svg/animations/animateTransform-accumulation-expected.svg: Added.
* svg/animations/animateTransform-accumulation.svg: Added.
* svg/animations/animateTransform-by-scale-expected.svg: Added.
* svg/animations/animateTransform-by-scale.svg: Added.
* svg/animations/animateTransform-from-by-from-to-comparision-expected.svg: Added.
* svg/animations/animateTransform-from-by-from-to-comparision.svg: Added.
* svg/animations/animateTransform-from-by-scale-additive-sum-expected.svg: Added.
* svg/animations/animateTransform-from-by-scale-additive-sum.svg: Added.
* svg/animations/animateTransform-from-by-scale-expected.svg: Added.
* svg/animations/animateTransform-from-by-scale.svg: Added.
* svg/animations/animateTransform-rotate-around-point-expected.svg: Added.
* svg/animations/animateTransform-rotate-around-point.svg: Added.
* svg/animations/animateTransform-skewX-expected.svg: Added.
* svg/animations/animateTransform-skewX.svg: Added.
* svg/animations/animateTransform-skewY-expected.svg: Added.
* svg/animations/animateTransform-skewY.svg: Added.
* svg/animations/animateTransform-translate-expected.svg: Added.
* svg/animations/animateTransform-translate.svg: Added.
* svg/animations/multiple-animateTransform-additive-sum-expected.svg: Added.
* svg/animations/multiple-animateTransform-additive-sum.svg: Added.
* svg/animations/resources/additive-type-by-animation.svg:
* svg/animations/script-tests/additive-type-by-animation.js:
(checkBaseVal):
(sample1):
(sample2):
(sample3):
* svg/animations/script-tests/svgtransform-animation-1.js:
(sample1):
(sample2):
(sample3):
(sample4):
(sample5):
(sample6):
(sample7):
(executeTest):
* svg/animations/script-tests/svgtransform-animation-discrete.js:
(sample1):
(sample2):
(sample3):
(executeTest):
* svg/animations/svgtransform-animation-1-expected.txt:
* svg/animations/svgtransform-animation-discrete-expected.txt:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@115425 268f45cc-cd09-0410-ab3c-d52691b4dbfc