Hi everyone.
Im having al ittle difulty with the GD lib and wondered if some one could help me out.

I have two images. 1 a jpg and the other a transparent PNG

I wish to firstly, resize the jpg. ( which i am doing successfully ).
I then want to lay the jgp BEHIND the png which basically has a transparent box in the middle which will show the jgp behind.

Im having a problem which is i am lsoing the width and height of the png for some reason or somethime like is hapening.

Firstly , i resize my original image which results in a image size 360x268

$percent = 0.5;

list($width, $height) = getimagesize('meanddad.jpg');
$new_width = $width * $percent;
$new_height = $height * $percent;
$image_p = imagecreatetruecolor($new_width, $new_height);
$image = imagecreatefromjpeg('meanddad.jpg');

imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

imagejpeg($image_p, "underlay_image.jpg");

WORKS FINE and underlay_image.jpg is created.


THEN i try to place this image behind a png which is 504 x 405
I want to keep the resulting image and NOt crop or effect the png.

$width = 540;
$height = 405;
 
$bottom_image = imagecreatefromjpeg('underlay_image.jpg');
$top_image = imagecreatefrompng('Photo-Template.png');

imagesavealpha($top_image, false);      // enable transparancy
imagealphablending($top_image, false);

imagecopy($bottom_image, $top_image, 0, 0, 0, 0, $width, $height);

imagepng($bottom_image, "new_image.png");

The resulting image new_image.png is 360x268 NOT 504x405 and accrodingly, the front image ( the png ) is now cropped.

I am sure i have done something silly would would really aprepciate a pointer on this please.

Thanks

Well, you are copying a 504x405 image onto a 360x268 image, so it only seems naturl that the copied image would have to shrink. I don't know if it works, but you could try setting the coordinates negative, to shift the .png image so that its' center is placed on top of the .jpg image's center.

PHP Code:

imagecopy($bottom_image, $top_image, 0, 0, -72, -69, $width, $height); 


Thanks for your reply. I actually ended up sorting the problem creating a canvas for the background image of 540 x 405 and resizing on that.
Issue sorted but thanks for you input.