Code:
<?php
header("Content-type: image/png");
$hue = rand(0, 360);
$sat = rand(80,100);
$lum = rand(50,100);
$hue /= 360;
$sat /= 100;
$lum /= 100;
$result = ColorHSLToRGB($hue, $sat, $lum);
$col1 = sprintf('%02x', $result['r']) . sprintf('%02x', $result['g']) . sprintf('%02x', $result['b']);
$hue2 = $hue + ((mt_rand() / mt_getrandmax()) / 10) - 0.5;
$sat2 = $sat + ((mt_rand() / mt_getrandmax()) / 10) - 0.5;
$lum2 = $lum + ((mt_rand() / mt_getrandmax()) / 10) - 0.5;
$result2 = ColorHSLToRGB($hue2, $sat2, $lum2);
$col2 = sprintf('%02x', $result2['r']) . sprintf('%02x', $result2['g']) . sprintf('%02x', $result2['b']);
function ColorHSLToRGB($h, $s, $l){
$r = $l;
$g = $l;
$b = $l;
$v = ($l <= 0.5) ? ($l * (1.0 + $s)) : ($l + $s - $l * $s);
if ($v > 0){
$m;
$sv;
$sextant;
$fract;
$vsf;
$mid1;
$mid2;
$m = $l + $l - $v;
$sv = ($v - $m ) / $v;
$h *= 6.0;
$sextant = floor($h);
$fract = $h - $sextant;
$vsf = $v * $sv * $fract;
$mid1 = $m + $vsf;
$mid2 = $v - $vsf;
switch ($sextant)
{
case 0:
$r = $v;
$g = $mid1;
$b = $m;
break;
case 1:
$r = $mid2;
$g = $v;
$b = $m;
break;
case 2:
$r = $m;
$g = $v;
$b = $mid1;
break;
case 3:
$r = $m;
$g = $mid2;
$b = $v;
break;
case 4:
$r = $mid1;
$g = $m;
$b = $v;
break;
case 5:
$r = $v;
$g = $m;
$b = $mid2;
break;
}
}
return array('r' => $r * 255.0, 'g' => $g * 255.0, 'b' => $b * 255.0);
}
$height = 144;
$width = 144;
$start = $col1;
$end = $col2;
if ($_GET['start']) {
$start = $_GET['start'];
}
if ($_GET['end']) {
$end = $_GET['end'];
}
$start_r = hexdec(substr($start, 0, 2));
$start_g = hexdec(substr($start, 2, 2));
$start_b = hexdec(substr($start, 4, 2));
$end_r = hexdec(substr($end, 0, 2));
$end_g = hexdec(substr($end, 2, 2));
$end_b = hexdec(substr($end, 4, 2));
$image = @imagecreate($width, $height);
for($y=0;$y<$height;$y++) {
for($x=0;$x<$width;$x++) {
if ($start_r == $end_r) {
$new_r = $start_r;
}
$difference = $start_r - $end_r;
$new_r = $start_r - intval(($difference / $height) * $y);
if ($start_g == $end_g) {
$new_g = $start_g;
}
$difference = $start_g - $end_g;
$new_g = $start_g - intval(($difference / $height) * $y);
if ($start_b == $end_b) {
$new_b = $start_b;
}
$difference = $start_b - $end_b;
$new_b = $start_b - intval(($difference / $height) * $y);
$row_color = imagecolorresolve($image, $new_r, $new_g, $new_b);
imagesetpixel($image, $x, $y, $row_color);
}
}
function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct){
// creating a cut resource
$cut = imagecreatetruecolor($src_w, $src_h);
// copying relevant section from background to the cut resource
imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h);
// copying relevant section from watermark to the cut resource
imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h);
// insert cut resource to destination image
imagecopymerge($dst_im, $cut, $dst_x, $dst_y, 0, 0, $src_w, $src_h, $pct);
}
$yagami = imagecreatefrompng('yagami.png');
imagecopymerge_alpha($image, $yagami, 0, 0, 0, 0, 144, 144, 100);
imagepng($image);
imagedestroy($image);
imagedestroy($yagami);
?>
This can be seen at the page I'm using. As you can see, the eyes aren't blue, the black clothing isn't black (it's colored), etc.
The colors of the overlay are changed to match the background, and that's not what I want. How can I fix this?
