GD picture construction

PHP
1

I’m trying to run a simple script to compile a composite png from a group of individuals.

Viewing each tile individually ( here ) correctly shows the tiles individually colored/discolored depending on state in the database.

However, when compiling them together, I come up with this. An orange-ish wash over the whole image.

$res exists and has the correct information.


$col = 0;
$srow = 0;
$out = imagecreate(512,(64*ceil($res->num_rows/8)));
while($row = $res->fetch_array()) {
 if(!file_exists('gametiles/'.$row['id'].'.jpg')) {
    copy("http://tiles.xbox.com/tiles/".$row['tile'].".jpg",'gametiles/'.$row['id'].'.jpg');
 }
 $source = imagecreatefromjpeg('gametiles/'.$row['id'].'.jpg');
  imagecopymergegray($source,$source,0,0,0,0,64,64,(100*$row['achieved']));
imagecopy($out,$source,(64*$col),(64*$srow),0,0,64,64); 
 $col++;
 if ($col == 8) { 
   $col = 0;
   $srow++;
 }
}
imagepng($out);

What am i missing?

2

The muting is the idea.
The images are all colored. The idea is that if the achieved field is 0, it will reduce the color factor to 0 (greyscale), otherwise leave it at 100 (color).

Switching to createtruecolor however did the trick. Thanks!

3

Also, you could try using imagecopymerge instead of imagecopymergegray.
I’ve never used imagecopymergegray, but the name suggests it may be responsible for muting the colours in your images.

4

Instead of imagecreate(), try imagecreatetruecolor().