public function rotate($degree, $color = array(255, 255, 255))
{
if (!function_exists('imagerotate')) {
throw new ImageUtilityException('ImageGdUtility 錯誤！', '尚未找尋到 imagerotate 函式！', '請確認 GD 函式庫中是否有支援 imagerotate 函式！');
}
if (!is_numeric($degree)) {
throw new ImageUtilityException('ImageGdUtility 錯誤！', '角度一定要是數字，degree：' . $degree, '請確認 GD 函式庫中是否有支援 imagerotate 函式！');
}
if (!ImageUtility::verifyColor($color)) {
throw new ImageUtilityException('ImageGdUtility 錯誤！', '色碼錯誤！', '請確認色碼格式，目前只支援 字串HEX、陣列RGB 格式！');
}
if (!($degree % 360)) {
return $this;
}
$temp = function_exists('imagecreatetruecolor') ? imagecreatetruecolor(1, 1) : imagecreate(1, 1);
$newImage = imagerotate($this->image, 0 - $degree, imagecolorallocate($temp, $color[0], $color[1], $color[2]));
return $this->_updateImage($newImage);
}
