int getrgb (char *line, int rgb[], int color_model)
{
int n, count;
count = slash_count (line);
if (count == 3) { /* c/m/y/k */
double cmyk[4];
n = sscanf (line, "%lf/%lf/%lf/%lf", &cmyk[0], &cmyk[1], &cmyk[2], &cmyk[3]);
if (n != 4 || check_cmyk (cmyk)) return (TRUE);
cmyk_to_rgb (rgb, cmyk);
return (FALSE);
}
if (count == 2) { /* r/g/b or h/s/v */
if (color_model == RGB) { /* r/g/b */
n = sscanf (line, "%d/%d/%d", &rgb[0], &rgb[1], &rgb[2]);
if (n != 3 || check_rgb (rgb)) return (TRUE);
}
else { /* h/s/v */
double h, s, v;
n = sscanf (line, "%lf/%lf/%lf", &h, &s, &v);
if (n != 3 || check_hsv (h, s, v)) return (TRUE);
hsv_to_rgb (rgb, h, s, v);
}
return (FALSE);
}
if (count == 0) { /* gray */
n = sscanf (line, "%d", &rgb[0]);
rgb[1] = rgb[2] = rgb[0];
if (n != 1 || check_rgb (rgb)) return (TRUE);
return (FALSE);
}
/* Get here if there is a problem */
return (TRUE);
}
static int check_option(int argc, char * argv[], struct option_info * info)
{
int ret = 0;
int c;
if (argc <= 1) {
usage();
return -1;
}
memset(info, 0, sizeof(*info));
ret = 0;
while (!ret)
{
c = getopt (argc, argv, "i:o:r:hv");
if (c == -1) {
ret = 0;
break;
}
switch (c)
{
case 'i':
strncpy(info->input_file, optarg, sizeof(info->input_file)-1);
info->action |= stricmp("fb", info->input_file) ? (eFile << 1) : (eFb << 1);
break;
case 'o':
strncpy(info->output_file, optarg, sizeof(info->output_file)-1);
info->action |= stricmp("fb", info->output_file) ? eFile : eFb;
break;
case 'r':
info->output_rgb = check_rgb(optarg);
if (eRGB_MIN == info->output_rgb) {
ret = -1;
}
break;
case 'v':
version();
ret = -1;
break;
case 'h':
case '?':
usage();
ret = -1;
break;
default:
printf ("?? getopt returned character code 0x%x ??\n", c);
usage();
ret = -1;
break;
}
}
if (info->output_rgb == eRGB_MIN) {
info->output_rgb = eRGB_565;//默认输出为565格式
}
//如果只有两个参数，而且没有前缀，则认为argv[1]为输入图片，并且将图片打印到fb中
if ((argc == 2) && (optind < argc)) {
info->action = eAction_file_to_fb;
strncpy(info->input_file, argv[1], sizeof(info->input_file)-1);
return 0;
}
//还有多余参数，则认为非法，要退出
if (optind < argc) {
printf ("non-option ARGV-elements: ");
while (optind < argc)
printf ("%s ", argv[optind++]);
printf ("\n");
usage();
return -1;
}
if (ret) {
return ret;
}
ret = -1;
do
{
if (info->action == eAction_file_to_file
|| info->action == eAction_file_to_fb
|| info->action == eAction_fb_to_file)
{
//do nothing
} else {
printf("check_option : unknown action type!\n");
break;
}
ret = 0;
} while (0);
return ret;
}
