111 color_of(const char *arg)  in color_of()  argument
117       if (strcmp(colors[icolor].name, arg) == 0)  in color_of()
121    fprintf(stderr, "genpng: invalid color %s\n", arg);  in color_of()
126 width_of(const char *arg)  in width_of()  argument
128    if (strcmp(arg, "filled") == 0)  in width_of()
134       double w = strtod(arg, &ep);  in width_of()
140    fprintf(stderr, "genpng: invalid line width %s\n", arg);  in width_of()
145 coordinate_of(const char *arg)  in coordinate_of()  argument
148    double w = strtod(arg, &ep);  in coordinate_of()
153    fprintf(stderr, "genpng: invalid coordinate value %s\n", arg);  in coordinate_of()
157 struct arg; /* forward declaration */
159 typedef int (*shape_fn_ptr)(const struct arg *arg, double x, double y);
173 struct arg  struct
294 alpha_calc(const struct arg *arg, double x, double y)  in alpha_calc()  argument
300    switch (arg->check_fn(arg, x, y))  in alpha_calc()
327                   if (wx != 0 && arg->inside_fn(arg, x+dx/16, y+dy/16))  in alpha_calc()
365 inside_square_filled(const struct arg *arg, double x, double y)  in inside_square_filled()  argument
367    return square_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2);  in inside_square_filled()
371 square_check_line(const struct arg *arg, double x, double y, double w)  in square_check_line()  argument
385    double cx = (arg->x1+arg->x2)/2;  in square_check_line()
386    double wx = fabs(arg->x1-arg->x2)/2;  in square_check_line()
387    double cy = (arg->y1+arg->y2)/2;  in square_check_line()
388    double wy = fabs(arg->y1-arg->y2)/2;  in square_check_line()
407 check_square_filled(const struct arg *arg, double x, double y)  in check_square_filled()  argument
414    return square_check_line(arg, x, y, FILTER_WIDTH);  in check_square_filled()
418 inside_square(const struct arg *arg, double x, double y)  in inside_square()  argument
423    return square_check_line(arg, x, y, arg->width/2) == 0;  in inside_square()
427 check_square(const struct arg *arg, double x, double y)  in check_square()  argument
431    double w = arg->width/2;  in check_square()
433    if (square_check_line(arg, x, y, w+FILTER_WIDTH) == 0)  in check_square()
440       if (w > 0 && square_check_line(arg, x, y, w) == 0)  in check_square()
482 inside_circle_filled(const struct arg *arg, double x, double y)  in inside_circle_filled()  argument
484    return circle_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2);  in inside_circle_filled()
488 circle_check_line(const struct arg *arg, double x, double y, double w)  in circle_check_line()  argument
494    double cx = (arg->x1+arg->x2)/2;  in circle_check_line()
495    double wx = fabs(arg->x1-arg->x2)/2;  in circle_check_line()
496    double cy = (arg->y1+arg->y2)/2;  in circle_check_line()
497    double wy = fabs(arg->y1-arg->y2)/2;  in circle_check_line()
516 check_circle_filled(const struct arg *arg, double x, double y)  in check_circle_filled()  argument
518    return circle_check_line(arg, x, y, FILTER_WIDTH);  in check_circle_filled()
522 inside_circle(const struct arg *arg, double x, double y)  in inside_circle()  argument
524    return circle_check_line(arg, x, y, arg->width/2) == 0;  in inside_circle()
528 check_circle(const struct arg *arg, double x, double y)  in check_circle()  argument
531    double w = arg->width/2;  in check_circle()
533    if (circle_check_line(arg, x, y, w+FILTER_WIDTH) == 0)  in check_circle()
537       if (w > 0 && circle_check_line(arg, x, y, w) == 0)  in check_circle()
600 inside_line(const struct arg *arg, double x, double y)  in inside_line()  argument
602    return line_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2, arg->width/2, 0);  in inside_line()
606 check_line(const struct arg *arg, double x, double y)  in check_line()  argument
611    if (line_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2, arg->width/2,  in check_line()
617       if (arg->width > 2*FILTER_WIDTH &&  in check_line()
618           line_check(x, y, arg->x1, arg->y1, arg->x2, arg->y2, arg->width/2,  in check_line()
653 shape_of(const char *arg, double width, int f)  in shape_of()  argument
657    for (i=0; i<shape_count; ++i) if (strcmp(shape_defs[i].name, arg) == 0)  in shape_of()
665          width == 0 ? "filled" : "unfilled", arg);  in shape_of()
669    fprintf(stderr, "genpng: %s: not a valid shape name\n", arg);  in shape_of()
674 parse_arg(struct arg *arg, const char **argv/*7 arguments*/)  in parse_arg()  argument
677    arg->color = color_of(argv[0]);  in parse_arg()
678    arg->width = width_of(argv[1]);  in parse_arg()
679    arg->inside_fn = shape_of(argv[2], arg->width, FN_INSIDE);  in parse_arg()
680    arg->check_fn = shape_of(argv[2], arg->width, FN_CHECK);  in parse_arg()
681    arg->x1 = coordinate_of(argv[3]);  in parse_arg()
682    arg->y1 = coordinate_of(argv[4]);  in parse_arg()
683    arg->x2 = coordinate_of(argv[5]);  in parse_arg()
684    arg->y2 = coordinate_of(argv[6]);  in parse_arg()
702 pixel(png_uint_16p p, struct arg *args, int nargs, double x, double y)  in pixel()
761       struct arg arg_list[max_shapes];  in main()