const unsigned char *cust_hatch, int dx, int dy);
extern i_fill_t *
i_new_fill_image(i_img *im, const double *matrix, int xoff, int yoff, int combine);
+extern i_fill_t *i_new_fill_opacity(i_fill_t *, double alpha_mult);
extern void i_fill_destroy(i_fill_t *fill);
float i_gpix_pch(i_img *im,int x,int y,int ch);
extern void i_map(i_img *im, unsigned char (*maps)[256], unsigned int mask);
float i_img_diff (i_img *im1,i_img *im2);
+double i_img_diffd(i_img *im1,i_img *im2);
/* font routines */