Pixel colour

[Derek Scollon]

I'm using PHP4.2.2 with gd on a Linux platform and am having difficulty
in solving a little problem despite going through the definitions of the
various image functions.

If you load a true-colour image from a file using...

$image=imagecre atefrompng("fil e.png");

....how do you then get the red, green and blue values of a pixel at $x,
$y within that image? I'm sure it's fairly simple but I can't find this
from what I've read so far.

Can anyone give me any pointers?

[Jon Kraft]

Re: Pixel colour

Derek Scollon <dscollon@scotw ebsolutions.com > wrote:
[color=blue]
> I'm using PHP4.2.2 with gd on a Linux platform and am having difficulty
> in solving a little problem despite going through the definitions of the
> various image functions.
>
> If you load a true-colour image from a file using...
>
> $image=imagecre atefrompng("fil e.png");
>
> ...how do you then get the red, green and blue values of a pixel at $x,
> $y within that image? I'm sure it's fairly simple but I can't find this
> from what I've read so far.[/color]

imagecolorat():

http://uk.php.net/manual/en/function.imagecolorat.php

HTH;
JOn

[Derek Scollon]

Re: Pixel colour

Jon Kraft wrote:[color=blue]
> Derek Scollon <dscollon@scotw ebsolutions.com > wrote:
>
>[color=green]
>>I'm using PHP4.2.2 with gd on a Linux platform and am having difficulty
>>in solving a little problem despite going through the definitions of the
>>various image functions.
>>
>>If you load a true-colour image from a file using...
>>
>>$image=imagec reatefrompng("f ile.png");
>>
>>...how do you then get the red, green and blue values of a pixel at $x,
>>$y within that image? I'm sure it's fairly simple but I can't find this
>>from what I've read so far.[/color]
>
>
> imagecolorat():
> http://uk.php.net/manual/en/function.imagecolorat.php
>
> HTH;
> JOn[/color]

Brilliant. I missed this function completely. Thanks very much Jon.