public static function resizeImage($origin, $w, $h, $_options = array())
{
$options = array_merge(array('resize' => self::PROPORTIONAL, 'destination' => $origin, 'action' => self::MOVE_ORIG_DEST, 'outputFormat' => self::SAME_AS_ORIGIN), $_options);
if (!file_exists($origin)) {
return false;
}
// read file
$image_info = getimagesize($origin);
$image_type = $image_info[2];
if ($image_info[0] > self::UPLOAD_MAX_WIDTH || $image_info[1] > self::UPLOAD_MAX_HEIGHT) {
return "Exceeded maximum dimensions (" . self::UPLOAD_MAX_WIDTH . "x" . self::UPLOAD_MAX_HEIGHT . ")";
}
if ($image_type == IMAGETYPE_JPEG) {
$image = imagecreatefromjpeg($origin);
$extOrig = 'jpg';
} elseif ($image_type == IMAGETYPE_GIF) {
$image = imagecreatefromgif($origin);
$extOrig = 'gif';
} elseif ($image_type == IMAGETYPE_PNG) {
$image = imagecreatefrompng($origin);
$extOrig = 'png';
}
// destination file extension calculation
$extDest = $options['outputFormat'] === self::SAME_AS_ORIGIN ? $extOrig : ImageTools::getExtension($options['destination']);
// redimensionar
$wimg = imagesx($image);
$himg = imagesy($image);
$resizeMode = $options['resize'];
switch ($resizeMode) {
case self::TO_HEIGHT:
$ratio = $h / $himg;
$height = $h;
$width = $wimg * $ratio;
break;
case self::TO_WIDTH:
$ratio = $w / $wimg;
$width = $w;
$height = $himg * $ratio;
break;
case self::EXACT_SIZE:
$width = $w;
$height = $h;
break;
case self::PROPORTIONAL:
default:
$ratioh = $h / $himg;
$ratiow = $w / $wimg;
$ratio = $ratioh > $ratiow ? $ratiow : $ratioh;
$width = $wimg * $ratio;
$height = $himg * $ratio;
break;
}
// process
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, $wimg, $himg);
imagedestroy($image);
$destination = $options['destination'];
if ($extDest == 'jpg' || $extDest == 'jpeg') {
imagejpeg($new_image, $destination);
} elseif ($extDest == 'gif') {
imagegif($new_image, $destination);
} elseif ($extDest == 'png') {
imagepng($new_image, $destination);
}
chmod($destination, 0777);
if ($options['action'] == self::MOVE_ORIG_DEST) {
@unlink($origin);
}
imagedestroy($new_image);
return true;
}
