imagecopymerge_alpha는 내 오버레이를 dest img의 색상으로 변환합니까?

코드는 :imagecopymerge_alpha는 내 오버레이를 dest img의 색상으로 변환합니까?

<?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); 

?>

이 the page I'm using에서 볼 수 있습니다. 당신이 볼 수 있듯이, 눈

오버레이의 색상