Applying .pal to created image file using PHP

[Jupeto]

I'm just wondering if how can I apply a palette on my created single head frame resource something like in the code below

$head = imagecreatefrompng('first.png');

I'm using PHP to apply .pal file. Also, please be noted that the image above doesn't come / parsed from .spr file

Edited August 30, 2012 by Jupeto

[GreenBox]

You can't do this on a PNG as the colors are stored as RGBA colors, but you can find the color index by comparing the pixel against the original palette, then swap the colors with the new palette.

Example:

$origpallete = array(...);
$newpallete = array(...);

for ($x = 0; $x < $width; $x++)
{
for ($x = 0; $x < $width; $x++)
{
	$color = getcolor($x, $y);

	for ($i = 0; $i < count($origpallete); $i++)
	{
		if ($origpallete[$i] == $color)
			break;
	}

	if ($i < count($newpallete))
		setpixel($x, $y, $newpallete[$i]);
}
}

[Jupeto]

I really don't know how to work with palettes

To any of you know how please do help, Thanks

here's my current code

$sprite = new sprite('../../data/sprite/head/' . $gender . '/' . $head . '_' . $gender . '.spr');
$sprite_resource = $sprite->displayFrame( $frame );

$palette_handle = fopen( '../../data/palette/head/9.pal', "r" );
$palette_data = fread( $palette_handle, 1024 );

/* Open the base job image */
$base_job = imagecreatefrompng('../../data/sprite/body/1.png');

$frame  = $sprite->frames[$frame];
$width  = $frame['width'];
$height = $frame['height'];
$data   = $frame['data'];

$pal = array();
for ( $i=0, $j=4; $i<256; ++$i, ++$j )
$pal[$i] = imagecolorallocate(
$sprite_resource,
ord($sprite->palette[$j++]),
ord($sprite->palette[$j++]),
ord($sprite->palette[$j++])
);

for ( $i=0; $i < $width * $height; ++$i )
{
imagesetpixel( $sprite_resource, $i % $width, $i/$width | 0, $pal[ ord($data[$i]) ] );
}

/* Create the base head image*/
imagegif( $sprite_resource, $temp_file );

This currently results to this image; I only want the head to be dyed

Edited August 31, 2012 by Jupeto

[Camilla]

Not sure it will help but that's how I do it. I'll use pseudo-code, because I forgot about PHP.

Make sure your PNG Head is in 8 bits. Export the palette of your PNG in .pal (using photoshop), let's name it "Original_Head.pal". Remove the photoshop header in your .pal file.

Load "Original_Head.pal" in hex string in your php script. => $hex_head_pal

Load "New.pal" that you want to apply to your head in hex string => $hex_new_pal

Load your "Head.png" in hex string => $hex_head_image

Now do: $hex_head_image.replace($hex_head_pal, $hex_new_pal).

Then create your image using a png header and echo the binary content of the image. Load your image in a src.

[Jupeto]

Well I'm now able to extract the frame from each .spr file.

I was reading this thread but I'm still not getting the right syntax

http://www.google.co...8kW0gN7uoPoff6w

Edited September 1, 2012 by Jupeto

[KeyWorld]

Well, I will release my php charsim soon, but I can help for now.

There is a lot of codes that aren't used in your code so it's hard to know what you do exactly. But for sure, the $j in the for() should be init as 0 (not 4).

Well if you need help it will be better to post the whole script, here or in pm