GP INTERACTIVE wrote:
you can use also the following function :
<?php
// --- image play path
$watermarkfile = 'images/play_small.png'; // as an example
function getPictureMarked($sourcefile, $watermarkfile) {
#
# $sourcefile = Filename of the picture to be watermarked.
# $watermarkfile = Filename of the 24-bit PNG watermark file.
#
//Get the resource ids of the pictures
$watermarkfile_id = imagecreatefrompng($watermarkfi
le);
imageAlphaBlending($watermarkfile_id, false);
imageSaveAlpha($watermarkfile_id, true);
$fileType = strtolower(substr($sourcefile, strlen($sourcefile)-3));
switch($fileType) {
case('gif'):
$sourcefile_id = imagecreatefromgif($sourcefile);
break;
case('png'):
$sourcefile_id = imagecreatefrompng($sourcefile);
break;
default:
$sourcefile_id = imagecreatefromjpeg($sourcefile);
}
//Get the sizes of both pix
$sourcefile_width=imageSX($sourcefile_id);
$sourcefile_height=imageSY($sourcefile_id);
$watermarkfile_width=imageSX($watermarkfile_id);
$watermarkfile_height=imageSY($watermarkfile_id);
$dest_x = ( $sourcefile_width / 2 ) - ( $watermarkfile_width / 2 );
$dest_y = ( $sourcefile_height / 2 ) - ( $watermarkfile_height / 2 );
// if a gif, we have to upsample it to a truecolor image
if($fileType == 'gif') {
// create an empty truecolor container
$tempimage = imagecreatetruecolor($sourcefile_width,
$sourcefile_height);
// copy the 8-bit gif into the truecolor image
imagecopy($tempimage, $sourcefile_id, 0, 0, 0, 0,
$sourcefile_width, $sourcefile_height);
// copy the source_id int
$sourcefile_id = $tempimage;
}
imagecopy($sourcefile_id, $watermarkfile_id, $dest_x, $dest_y, 0,
0, $watermarkfile_width, $watermarkfile_height);
//Create a jpeg out of the modified picture
switch($fileType) {
// remember we don't need gif any more, so we use only png or
jpeg.
// See the upsaple code immediately above to see how we handle
gifs
case('png'):
header("Content-type: image/png");
imagepng ($sourcefile_id);
break;
default:
header("Content-type: image/jpg");
imagejpeg ($sourcefile_id);
}
imagedestroy($sourcefile_id);
imagedestroy($watermarkfile_id);
}
?>
Regards,
Greg
http://www.psmdev.com <http://www.psmdev.com/>
On 8/4/07, *Tom Ray [Lists]* < lists@xxxxxxxxxxxxxxxx
<mailto:lists@xxxxxxxxxxxxxxxx>> wrote:
I've been learning how to use PHP with the GD Library and I've
managed
to learn quite a bit. I can upload, resize, create thumbnails and I'm
even able to create "security code" images for forms. My question
is how
do I create a Watermark on the image? I want something transparent
but
still visible enough to see the copyright and the website. I want
to put
it in the center of the image. I would use a non-water marked
image and
when it's called on (depending on viewing size) I want the water
mark to
be added.
How would one go about doing that?
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
<http://www.php.net/unsub.php>
I'll test this tonight...thanks!
--
PHP General Mailing List (http://www.php.net/)
To unsubscribe, visit: http://www.php.net/unsub.php
