$gd = imagecreate(120, 120);
$code = str_baseconvert(md5("image_shape_salt_" + $id), 16, 8);
$color = str_baseconvert(md5("image_color_salt_" + $id), 16, 36);
$background = imagecolorallocatealpha($gd, 255, 255, 255, 0);
$maincolor = imagecolorallocate($gd, base_convert($color[0], 36, 10) * 10 + 100, base_convert($color[1], 36, 10) * 10 + 100, base_convert($color[2], 36, 10) * 10 + 100);
for ($x = 0; $x < 4; $x++) {
for ($z = 0; $z < 4; $z++) {
$number = (int) $code[$x * 4 + $z];
switch ($number) {
case 0:
break;
case 1: // Full square
imagefilledrectangle($gd, $x * 30, $z * 30, $x * 30 + 29, $z * 30 + 29, $maincolor);
break;
case 2: // top
imagefilledrectangle($gd, $x * 30, $z * 30, $x * 30 + 14, $z * 30 + 29, $maincolor);
break;
case 3: // left
imagefilledrectangle($gd, $x * 30, $z * 30, $x * 30 + 29, $z * 30 + 14, $maincolor);
break;
case 4: // bottom
imagefilledrectangle($gd, $x * 30 + 15, $z * 30, $x * 30 + 29, $z * 30 + 29, $maincolor);
break;
case 5: // right
imagefilledrectangle($gd, $x * 30, $z * 30 + 15, $x * 30 + 29, $z * 30 + 29, $maincolor);
break;
case 6: // middle
imagefilledrectangle($gd, $x * 30 + 5, $z * 30 + 5, $x * 30 + 24, $z * 30 + 24, $maincolor);
break;
case 7: // hollow
imagefilledrectangle($gd, $x * 30, $z * 30, $x * 30 + 29, $z * 30 + 29, $maincolor);
imagefilledrectangle($gd, $x * 30 + 7, $z * 30 + 7, $x * 30 + 22, $z * 30 + 22, $background);
break;
}
}
}
$pattern = imagecreate(60, 60);
imagecopyresized($pattern, $gd, 0, 0, 0, 0, 60, 60, 120, 120);
imagecopy($gd, $pattern, 0, 0, 0, 0, 60, 60);
imageflip($pattern, IMG_FLIP_HORIZONTAL);
imagecopy($gd, $pattern, 60, 0, 0, 0, 60, 60);
imageflip($pattern, IMG_FLIP_VERTICAL);
imagecopy($gd, $pattern, 60, 60, 0, 0, 60, 60);
imageflip($pattern, IMG_FLIP_HORIZONTAL);
imagecopy($gd, $pattern, 0, 60, 0, 0, 60, 60);
imagedestroy($pattern);
imagepng($gd);
imagedestroy($gd);