* blur.c: fix the separate filter optimisation in the blur code by not

interpolating the Gaussian kernel integral when dx = dy = angle = 0.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@2800 92316355-f0b4-4df1-b90c-862c8a59935f

pipi/filter/blur.c

@@ -97,6 +97,10 @@ pipi_image_t *pipi_gaussian_blur_ext(pipi_image_t *src, float rx, float ry,
                 ex = Kx * u * u;
                 ey = Ky * v * v;
                 d += samples[k * 3 + 2] * exp(ex + ey);
+
+                /* Do not interpolate if this is a standard gaussian. */
+                if(!dx && !dy && !angle)
+                    break;
             }
 
             kernel[(j + kry) * m + i + krx] = d;