Images !!!!

[udendra]

Hi,
I was wonderig whether I could embed a small (cool) graphic into evry picture in my websites pic gallery. since I need to somewhat protect my hard-earned pictures from being stolen.
How caN PHP help me with this???

🙂

[drawmack]

check out the gb library.

[________]

Sure,
thats no problem if you got GD.

Eg.:

<?php
header ("Content-type: image/jpeg");

// the main picture
$im = @imagecreatefromjpeg ("main.jpg")
or die ("Cannot Initialize new GD image stream");

// your company logo
$im2 = @imagecreatefromjpeg ("logo.jpg")
or die ("Cannot Initialize new GD image stream");

imagecopy ($im, $im2, 0, 0, 0, 0, 135, 35);

imagejpeg ($im);
imagedestroy ($im);
?>

Take a look at the manual for more information:
http://no2.php.net/manual/en/function.imagecopy.php

Good luck!

[________]

Originally posted by ????????

imagecopy ($im, $im2, 0, 0, 0, 0, 135, 35);

Oops, there was an error with that scipt. Change 135 and 35 with the widt and height of your logo!

Here is a scirpt that place the logo at the right bottom of the image, here you don't have to change any sizes of stuff like that... just the name of the mail picture and your logo!

<?php
header ("Content-type: image/jpeg");
$im = @imagecreatefromjpeg ("main.jpg")
    or die ("Cannot Initialize new GD image stream");
$im2 = @imagecreatefromjpeg ("logo2.jpg")
    or die ("Cannot Initialize new GD image stream");

$im_width = imagesx($im);
$im_height = imagesy($im);

$im2_width = imagesx($im2);
$im2_height = imagesy($im2);

imagecopy ($im, $im2, $im_width - $im2_width, $im_height - $im2_height, 0, 0, $im2_width, $im2_height);

imagejpeg ($im);
imagedestroy ($im);
?>

[udendra]

yeah that was good,
now can I embed a Transparent GIF image onto a JPG file??

thankx.

[________]

There is not any support for GIF files in GD, but you buy it.

Note that you can make colors in a picture transparent, eg.:
here we make the color white(ff ff ff or 255 255 255) transparent.

$white = imagecolorallocate($im2, 255, 255, 255);
imagecolortransparent($im2, $white);

You can also make the whole logo a bit transparent by using the function imagecopymerge()

Eg.:
imagecopymerge ($im, $im2, $im_width - $im2_width, $im_height - $im2_height, 0, 0, $im2_width, $im2_height, 25);

Change the last number, 25, to change the level of transparacy.
If you set it to 100, imagecopymerge() works just like imagecopy()

[udendra]

the "imagecolortransparent" didn't work that good (or at all)..
but If I can not embed a GIf file , could I embed a PNG file with Transparent areas ???

🙁

[________]

Hi there,
I'm not sure how GD will handle transparent PNG pictures. The best way to find out is to try it!

Rememer to replace createfromjepg to createfrompng

$im2 = @imagecreatefrompng ("logo.png")
or die ("Cannot Initialize new GD image stream");

Tell if it works!

[udendra]

this was what i ended up with....
<?php
header ("Content-type: image/jpeg");
header ("Content-type: image/png");
header ("Content-type: image/gif");

$im = @imagecreatefromjpeg ("main.jpg")
or die ("Cannot Initialize new GD image stream");
//$im2 = @imagecreatefromjpeg ("logo.jpg")
// or die ("Cannot Initialize new GD image stream");
$im2 = @imagecreatefrompng ("logo.png")
or die ("Cannot Initialize new GD image stream");

$im_width = imagesx($im);
$im_height = imagesy($im);

$im2_width = imagesx($im2);
$im2_height = imagesy($im2);

        //Note that you can make colors in a picture transparent, eg.:
        //here we make the color white(ff ff ff or 255 255 255) transparent.
        //*********************
        $transColor = imagecolorallocate($im2, 18, 75, 39);
        imagecolortransparent($im2, $transColor);
        //*********************

imagecopy ($im, $im2, $im_width - $im2_width, $im_height - $im2_height, 0, 0, $im2_width, $im2_height);
//imagecopymerge ($im, $im2, $im_width - $im2_width, $im_height - $im2_height, 0, 0, $im2_width, $im2_height, 55);
imagejpeg ($im);
imagedestroy ($im);

?>

my problem for the moment is resolved.
C U guys later. 🆒