ok i solved and sharing the code.
the functions
function timemachine_createthumb($name, $path, $savepath, $new_w=100, $new_h=100, $quality=80){
$savefile = $savepath.$name;
$savepath = $savefile;
if(!file_exists($savepath)){
// Get image location
$image_path = $path ."/".$name;
// Load image
$img = null;
$ext = end(explode('.', $image_path));
if ($ext == 'jpg' || $ext == 'jpeg') {
$img = @imagecreatefromjpeg($image_path);
} else if ($ext == 'png') {
$img = @imagecreatefrompng($image_path);
// Only if your version of GD includes GIF support
} else if ($ext == 'gif') {
$img = @imagecreatefrompng($image_path);
}
// If an image was successfully loaded, test the image for size
if ($img) {
// Get image size and scale ratio
$width = imagesx($img);
$height = imagesy($img);
$scale = min($new_w/$width, $new_h/$height);
// If the image is larger than the max shrink it
if ($scale < 1) {
$new_width = floor($scale*$width);
$new_height = floor($scale*$height);
// Create a new temporary image
$tmp_img = imagecreatetruecolor($new_width, $new_height);
// Copy and resize old image into new image
imagecopyresized($tmp_img, $img, 0, 0, 0, 0,
$new_width, $new_height, $width, $height);
imagedestroy($img);
$img = $tmp_img;
}
}
// Create error image if necessary
if (!$img) {
$img = imagecreate($new_w, $new_h);
imagecolorallocate($img,0,0,0);
$c = imagecolorallocate($img,70,70,70);
imageline($img,0,0,$new_w,$new_h,$c2);
imageline($img,$new_w,0,0,$new_h,$c2);
}
// output the image as a file to the output stream
Imagejpeg($img,$savepath,$quality);
}
return $savefile;
}
the upload
//Form birthday_img
include_once XOOPS_ROOT_PATH."/class/uploader.php";
$uploaddir_birthday_img = XOOPS_ROOT_PATH."/uploads/timemachine/birthday/birthday_img/";
$uploaddir_birthday_thumbs_img = XOOPS_ROOT_PATH."/uploads/timemachine/birthday/birthday_thumbs_img/";
$uploader_birthday_img = new XoopsMediaUploader($uploaddir_birthday_img, $xoopsModuleConfig["birthday_img_mimetypes"], $xoopsModuleConfig["birthday_img_size"], null, null);
if ($uploader_birthday_img->fetchMedia("birthday_img")) {
$uploader_birthday_img->setPrefix(str_replace(" ","_",$_REQUEST["birthday_who"]));
$uploader_birthday_img->fetchMedia("birthday_img");
if (!$uploader_birthday_img->upload()) {
$errors = $uploader_birthday_img->getErrors();
redirect_header("javascript:history.go(-1)",3, $errors);
} else {
$obj->setVar("birthday_img", $uploader_birthday_img->getSavedFileName());
//genero la thumbnail
$name = $uploader_birthday_img->getSavedFileName();
$path = $uploaddir_birthday_img;
$savepath =$uploaddir_birthday_thumbs_img;
$new_w = $xoopsModuleConfig["birthday_img_thumb_width"];
$new_h = $xoopsModuleConfig["birthday_img_thumb_height"];
$thumb = timemachine_createthumb($name, $path, $savepath, $new_w, $new_h, $quality=80);
}
note
$xoopsModuleConfig["birthday_img_thumb_width"] and other, are in my module preferences.
