shithub: picker

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hsluv: avoid div by 0 error

--- a/hsluv.c

+++ b/hsluv.c

@@ -228,9 +228,14 @@

 static void

 xyz2luv(Triplet* in_out)

 {

-    double var_u = (4.0 * in_out->a) / (in_out->a + (15.0 * in_out->b) + (3.0 * in_out->c));

-    double var_v = (9.0 * in_out->b) / (in_out->a + (15.0 * in_out->b) + (3.0 * in_out->c));

     double l = y2l(in_out->b);

+    double var_u = 4.0 * in_out->a;

+    double var_v = 9.0 * in_out->b;

+    double div = (in_out->a + (15.0 * in_out->b) + (3.0 * in_out->c));

+    if (div > 0.00000001) {

+        var_u /= div;

+        var_v /= div;

+    }

     double u = 13.0 * l * (var_u - ref_u);

     double v = 13.0 * l * (var_v - ref_v);