function usage($argc, $argv)
{
fprintf(STDERR, "Usage: %s [OPTIONS]... <IMAGE>\n", $argv[0]);
fprintf(STDERR, "Convert IMAGE to any text based available format.\n");
fprintf(STDERR, "Example : %s -W 80 -f ansi ./caca.png\n\n", $argv[0]);
fprintf(STDERR, "Options:\n");
fprintf(STDERR, " -h, --help\t\t\tThis help\n");
fprintf(STDERR, " -v, --version\t\t\tVersion of the program\n");
fprintf(STDERR, " -W, --width=WIDTH\t\tWidth of resulting image\n");
fprintf(STDERR, " -H, --height=HEIGHT\t\tHeight of resulting image\n");
fprintf(STDERR, " -x, --font-width=WIDTH\t\tWidth of output font\n");
fprintf(STDERR, " -y, --font-height=HEIGHT\t\tHeight of output font\n");
fprintf(STDERR, " -b, --brightness=BRIGHTNESS\tBrightness of resulting image\n");
fprintf(STDERR, " -c, --contrast=CONTRAST\tContrast of resulting image\n");
fprintf(STDERR, " -g, --gamma=GAMMA\t\tGamma of resulting image\n");
fprintf(STDERR, " -d, --dither=DITHER\t\tDithering algorithm to use :\n");
$list = caca_get_dither_algorithm_list(caca_create_dither(imagecreate(1, 1)));
foreach ($list as $type => $name) {
fprintf(STDERR, "\t\t\t%s: %s\n", $type, $name);
}
fprintf(STDERR, " -f, --format=FORMAT\t\tFormat of the resulting image :\n");
$list = caca_get_export_list();
foreach ($list as $type => $name) {
fprintf(STDERR, "\t\t\t%s: %s\n", $type, $name);
}
}
function getAlgorithmList()
{
return caca_get_dither_algorithm_list($this->dt);
}
