Thanks for your replay.
The C-programing article was interesting. However; my problem was much simpler then I first thought. Here is the code I've written:
<code>
//$imgurl is the uploaded file
//$name is the new name for the image
//$cor_x is the x coordinate in the original image where the thumb should start
//$cor_y is the y coordinate...
//$orig_w is the original width of the area that should be converted to the thumb.
//$orig_h is the original height...
function jpgUploadSmall($imgurl, $name, $cor_x, $cor_y, $orig_w, $orig_h) {
$thmb_w = 50;
$thmb_h = 50;
$path="../../plantis/img/sort/";
$fileName = $name.".jpg";
$origImg = imagecreatefromjpeg($imgurl["tmp_name"]) or die("Could not create image");
$tmpImgA = imagecreatetruecolor($orig_w, $orig_h);
$tmpImgB=imagecreatetruecolor($thmb_w,$thmb_h);
imagecopy($tmpImgA, $origImg, 0, 0, $cor_x, $cor_y, $orig_w, $orig_h);
imagecopyresampled($tmpImgB,$tmpImgA,0,0,0,0,$thmb_w,$thmb_h, $orig_w, $orig_h);
imagejpeg($tmpImgB,$path.$fileName) or die("Could not write image");
imagedestroy($origImg);
imagedestroy($tmpImgA);
imagedestroy($tmpImgB);
return $fileName;
}
</code>
----- Original Message -----
From: "Svensson, B.A.T. (HKG)" <B.A.T.Svensson@lumc.nl>
To: "'Bobo Wieland '" <bobo.wieland@ektv.nu>; <php-windows@lists.php.net>
Sent: Saturday, December 27, 2003 11:43 AM
Subject: RE: imagecopyresampled question
> If I understand your problem correctly, you want to make
> a thumbnail out of a subpart of a picture? Is this correct?
>
> In the case you just want to create a thumbnail of a picture
> you might like to have a look at these functions:
>
> * exif_thumbnail()
> * getimagesize();
>
> If you want to create a thumbnail out of a subpart, then I am
> (in my\ very limited knowledge) not aware of an extraction
> function, you need to do that your self. If so, get the size
> and location information from the picture open the picture and
> read the data and spool the sub picture out to a new image file
> (with a new apropriate header), and then aplay texif_thumbnail()
> on that file - this is much easier said than done.
>
> On how to read&write an image file, you might have alook at:
>
> * http://netghost.narod.ru/gff/graphics/book/ch08_01.htm
>
> to teach you some of the basic stuff, it is mainly aimed for
> C-programmes (read: real programmers :), but a skilled php
> programmer should not have that much of a trouble to be able
> to convert the code examples into php.
>
>
> -----Original Message-----
> From: Bobo Wieland
> To: php-windows@lists.php.net
> Sent: 2003-12-26 20:33
> Subject: imagecopyresampled question
>
> Hi all and merry christmas (and a happy new year)!
>
> I use fixed values in this example, but of course it is variables in my
> script...
>
> Let's say I have an image uploaded to the server: 650x400px...
> Now, I've selected a square out of this image using a flash app that
> returns
> the coordinates i've selected. The coordinates are:
> start_x: 100px;
> start_y: 120px;
> end_x: 300px; (or width:200px;)
> end_y: 350px; (or height:200px;)
>
> No I need to use php to take this square out of the uploaded image and
> make it a 50x50px thumbnail. How should it be done?
>
>
> thanks for your help!
>
> .bobo
>
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