The imagecolorat() function doesn't work for truecolor images. You will
need a an indexed image for this to work. And worse, imagecolorat()
actually segfaults when run on a non-indexed image as far as I can tell.
Will commit a fix for that shortly.
-Rasmus
On Thu, 27 Sep 2001, ReDucTor wrote:
> Hey,
> I couldn't be bothered waiting for someone to show me a host that runs
> php with GD, so i am just going to post the code here, and hope that someone
> sees it, and checks it out, and shows the results
>
> If you can't find a jpg file to test this on, just grab the php jpg one,
> well i'll post the code now, so people can play with it, remember if you
> test it place show the results :D
>
> btw if you don't understand how to use it, you paste the code into a .php
> file, and change imgname to the path of an jpg image, if you want to use an
> png image, just change the im to ImageCreateFromPNG, ok, thats all...please
> show the results
>
> <html>
> <body bgcolor="#000000">
> <?php
> $imgname = "/path/to/a/jpeg/file";
> $im = ImageCreateFromJPEG($imgname);
> $output = " ";
> for($x=0;$x<imagesx($im);$x++)
> {
> for($y=0;$y<imagesy($im);$y++)
> {
> $color = ImageColorsForIndex(ImageColorAt($im, $x, $y));
> echo "<font size=\"1\" color=\"#";
> echo dechex($color['red']);
> echo dechex($color['green']);
> echo dechex($color['blue']);
> echo "\">\$</font>";
> }
> echo "<br>\n";
> }
> ?>
> </body></html>
>
> - James "ReDucTor" Mitchell
>
>
>
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