I can't figure this out , can you guys help a bit
I have am original cairo surface srf and its context c
now I am creating another surface shadow and superimposing it on previous one by
cairo_t *cr = c;
cairo_surface_t *shadow = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
c=cairo_create(shadow);
draw_rounded_rect(c, x_o+offset, y_o+offset, width, height, radius_int, 1, 1);
cairo_set_source_rgba(c, 0, 0, 0, 1);
cairo_fill(c);
blur_image_surface(shadow,10);
cairo_set_source_surface(cr,shadow,x,y);
cairo_paint(cr);
cairo_surface_destroy(shadow);
c=cr;
The blur algo I'm using is from official cairo doc here, which works separately
superimposition also works perfectly, but surface is not blurred at all
