yes, the gd2 file format does improve the speed of image creations as the data-setup is designed to be native for the GD function - ie, the image doesn't have to be converted to a usable format prior to processing.
you may also note that the newer gd2 format creates much smaller size files than the older imagegd function, certainly for images involving chunks of single colours anyway. you'll probably find this function most useful for saving overlay images or background images used in larger image creation scripts.
to read a ping or jpeg image (.png / .jpg) and save a .gd2 version to server...
$img = $_GET['img'];
if(file_exists($img))
{
$dim = getimagesize($img);
$cr = ($dim[2] < 4) ? ($dim[2] < 3) ? ($dim[2] < 2) ? NULL : imagecreatefromjpeg($img) : imagecreatefrompng($img) : Null;
if($cr !== NULL)
{
imagegd2($cr,substr($img,0,strrpos($img,'.')).'.gd2');
}
}
should save a copy with the same filename and directory using extension .gd2 - which can then be nicely and swiftly read using either imagecreatefromgd2 or imagecreatefromgd2part
imagegd2Descriptionbool imagegd2 ( resource image [, string filename [, int chunk_size [, int type]]] )imagegd2() outputs a GD2 image to filename. The image parameter is the return from the imagecreatetruecolor() function. The filename parameter is optional, and if left off, the raw image stream will be output directly. The optional type parameter is either IMG_GD2_RAW or IMG_GD2_COMPRESSED. Default is IMG_GD2_RAW.
See also imagegd()
imagegd2
mark at teckis dot com
16-Apr-2003 06:33
mysterium at gmx _spamsux_ dot ch
11-Feb-2003 02:35
A little more information: http://www.boutell.com/gd/manual2.0.11.html#gdImageGd2
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imagegammacorrect