Thodoris wrote:
דניאל דנון wrote:
I've tried to make a color table, but I am missing something. not in the
color-table-code itself, but in somewhere else... I just can't find...
untested but try..
// 4096*4096 = 16777216 = FFFFFF+1
$im = imagecreate(4096, 4096);
$white = imagecolorallocate($im, 0, 0, 0);
$r = $g = $b = $x = $y = 0;
$max = 255;
while ($r <= $max) {
while ($g <= $max) {
while ($b <= $max) {
$n = imagecolorallocate($im, $r, $g, $b);
imagesetpixel($im, $x, $y, $n);
$x = $x == 4096 ? 0 : $x+1;
$y = $y == 4096 ? 0 : $y+1;
$b++;
}
$b = 0;
$g++;
}
$g = 0;
$r++;
}
header("Content-Type: image/png");
imagepng($im);
imagedestroy($im);
Never used image manipulation with PHP but this is giving me a black image.
You probably need
$im = imagecreatetruecolor(4096,4096);
Still doesn't work...
Now the result is an almost black image with a yellow-white line in the middle.
Also be aware that creating a truecolor image 4096 pixels square is going to
take a LOT of memory, and it will take a while to download to the client, AND it
is 4096 pixels square!!!!! That's a fair bit bigger than most screens...
It was necessary to increase max execution time to something big above 4 minutes.
I suspect the OP is going to have to rethink this...
Still curious about the right script though (if this is possible of course).
--
Thodoris