function set_reasonable_image_size($image, $filename)
{
global $CONF;
list($width, $height) = getimagesize($filename);
if ($width <= $CONF['user_temp_avatar_max_width'] && $height <= $CONF['user_temp_avatar_max_height'])
return $image;
$size = resize_dimensions($CONF['user_temp_avatar_max_width'],$CONF['user_temp_avatar_max_height'],$width,$height);
$fwidth = $size['width'];
$fheight = $size['height'];
$thumb = imagecreatetruecolor($fwidth, $fheight); setTransparency($thumb,$image);
$index = imagecolorexact($thumb, 255, 255, 255); imagecolortransparent($thumb, $index);
imagecopyresampled($thumb, $image, 0, 0, 0, 0, $fwidth, $fheight, $width, $height);
imagepng($thumb,$filename);
return $thumb;
}
/**
* resize_image
*
* resizes images to a given width and height. if
* width is omitted height will be auto calculated
* caching is also performed if cache is set to
* true
*
* @params GDResource $image
* @params int $width
* @params int $height optional
* @params bool $cache optional
* @params string $path
* @return GDResource
*/
function resize_image($image, $width, $height = false, $cache = false, $path = false)
{
$name = 'RESIZE' . $width . $height;
if ($cache && cache_exists_image($name, $path)) {
return cache_get_image($name, $path);
}
$old_width = imagesx($image);
$old_height = imagesy($image);
if ($height == false) {
// calculate height
list($width, $height) = resize_dimensions($width, $width, $old_width, $old_height);
}
// resize image
$new_image = imagecreatetruecolor($width, $height);
imagecopyresampled($new_image, $image, 0, 0, 0, 0, $width, $height, $old_width, $old_height);
if ($cache) {
// cache the image
cache_image($name, $new_image, $path);
}
return $new_image;
}