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Source position: lazgdkpixbuf2.pas line 444
function gdk_pixbuf_add_alpha(  | 
pixbuf: PGdkPixbuf;  | 
substitute_color: gboolean;  | 
r: guint8;  | 
g: guint8;  | 
b: guint8  | 
):PGdkPixbuf;  |