Описание
int
ps_shading ( resource psdoc, string type, float x0, float y0, float x1, float y1, float c1, float c2, float c3, float c4, string optlist )
Creates a shading, which can be used by ps_shfill() or
ps_shading_pattern().
The color of the shading can be in any color space except for
pattern.