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sw_engine: gradient transformation combined with the shape transformation

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The gradient transformation has to be included in the last step
of gradient preparation (and combined with a shape transformation).
This commit is contained in:
Mira Grudzinska 2021-10-23 15:20:43 +02:00 • committed by Hermet Park
parent ae3d1e1b80
commit 07c42cb32d
1 changed files with 12 additions and 2 deletions
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14
src/lib/sw_engine/tvgSwFill.cpp
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@ -155,9 +155,19 @@ bool _prepareRadial(SwFill* fill, const RadialGradient* radial, const Matrix* tr
fill->radial.shiftY = -cy;
fill->radial.a = radius;
if (transform) {
auto gradTransform = radial->transform();
bool isTransformation = !mathIdentity(&gradTransform);
if (isTransformation) {
if (transform) mathMultiply(transform, &gradTransform);
} else if (transform) {
gradTransform = *transform;
isTransformation = true;
}
if (isTransformation) {
Matrix invTransform;
if (!mathInverse(transform, &invTransform)) return false;
if (!mathInverse(&gradTransform, &invTransform)) return false;
fill->radial.a11 = invTransform.e11 * invR;
fill->radial.a12 = invTransform.e12 * invR;