[RESOLVED] Creating sprite image with PHP, need assistance

mikes02

I was helped along with this and this is the code being utilized right now:

<?php 
$image_path = 'images/RCJ_BlogSite_11.jpg';
$input_image = imagecreatefromjpeg($image_path);
$image_info = getimagesize($image_path);
$output_image = imagecreatetruecolor($image_info[0], $image_info[1] * 2);
imagecopy ($output_image, $input_image, 0, 0, 0, 0, $image_info[0], $image_info[1]);
if(imagefilter($input_image, IMG_FILTER_GRAYSCALE)) 
{
    echo 'Image converted.';
    imagecopy ($output_image, $input_image, 0, $image_info[1], 0, 0, $image_info[0], $image_info[1]);
    imagejpeg($output_image, 'images/rcj-desaturated-2.jpg');
} else 
{
    echo 'Conversion failed.';
}
imagedestroy($input_image);
imagedestroy($output_image);
?>

However, the issue I am having is that the greyscale photo is showing up below the colored version in the sprite, I need for it to show up on top with the colored version below it, can you help me figure out what needs to be changed in this script to accomplish that, I have been working on it for a bit but I seem to missing something along the way.

Attached is the way the sprite looks now, I need for it to be the opposite.

bradgrafelman

The two calls to [man]imagecopy/man are where the colored and greyscale versions are being copied into the new image. As the manual states, the 3rd and 4th parameters define the 'x' and 'y' coordinates (respectively) on the destination image to place the copied image.

Simply swap the 'y' coordinates for the greyscale and colored versions and they'll be swapped in the destination image.

mikes02

Thank you, I switched it to:

<?php 
$image_path = 'images/RCJ_BlogSite_11.jpg';
$input_image = imagecreatefromjpeg($image_path);
$image_info = getimagesize($image_path);
$output_image = imagecreatetruecolor($image_info[0], $image_info[1] * 2);
imagecopy ($output_image, $input_image, 0, $image_info[1], 0, 0, $image_info[0], $image_info[1]);
if(imagefilter($input_image, IMG_FILTER_GRAYSCALE)) 
{
    echo 'Image converted.';
    imagecopy ($output_image, $input_image, 0, 0, 0, 0, $image_info[0], $image_info[1]);
    imagejpeg($output_image, 'images/rcj-desaturated-2.jpg');
} else 
{
    echo 'Conversion failed.';
}
imagedestroy($input_image);
imagedestroy($output_image);
?>

and it worked.