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Fix radial gradient when the gradient vector is close to (0,0) (fix #3126)

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This commit is contained in:
David Capello 2022-02-07 19:03:40 -03:00
parent 0588ebd01b
commit 903401e28d
1 changed files with 8 additions and 7 deletions
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15
src/render/gradient.cpp
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@ -144,18 +144,19 @@ void render_rgba_radial_gradient(
return;
}
// If there is no vector defining the gradient (just one point),
// the "gradient" will be just "c0"
if (p0 == p1) {
img->clear(c0);
return;
}
base::Vector2d<double>
u(p0.x, p0.y),
v(p1.x, p1.y), w;
w = (v - u) / 2;
// If there is no vector defining the gradient (just one point),
// the "gradient" will be just a solid color ("c1")
if (std::fabs(w.x) <= 0.000001 ||
std::fabs(w.y) <= 0.000001) {
img->clear(c1);
return;
}
// As we use non-premultiplied RGB values, we need correct RGB
// values on each stop. So in case that one color has alpha=0
// (complete transparent), use the RGB values of the