Image GD Resizing Issue - php

Question

So I'm trying to take two large images (but later I'll be combinging 6 images in total), resize them to the x, y width, height I have taken from photoshop, and combine them into one 460 x 230 sized image.
This is the code I'm using
<?php
$dest = imagecreatefrompng('https://blzgdapipro-a.akamaihd.net/hero/ana/career-portrait.png');
$src = imagecreatefrompng('https://blzgdapipro-a.akamaihd.net/game/rank-icons/season-2/rank-6.png');
imagealphablending($dest, false);
imagesavealpha($dest, true);
imagealphablending($src, false);
imagesavealpha($src, true);
//imagescale($dest, 396, 161.92);
$some = imagecreate(460, 230);
$dest2 = resize($dest, 396, 162);
$src2 = resize($src, 79.19, 79.19);
//imagecopyresized($dest, $dest, 0, 0, 0, 0, 396, 161.92, 1098, 449);
imagecopyresized($src, $src, 10, 10, 0, 0, 79.19, 79.19, 256, 256);
//$img2 = imagecopymerge($dest, $src, 0, 0, 0, 0, 256, 256, 100); //have to play with these numbers for it to work for you, etc.
imagecopymerge($dest2, $src2, 0, 0, 0, 0, 460, 230, 50);
header('Content-Type: image/png');
imagepng($dest, 'merged2.png');
imagepng($dest2);
//file_put_contents('merged.png', $contents);
imagedestroy($dest);
imagedestroy($src);
imagedestroy($some);
imagedestroy($dest2);
imagedestroy($src2);
imagedestroy($img2);
//imagedestroy($then);
function resize($img, $width, $height, $stretch = false)
{
$temp = imagecreatetruecolor($width, $height);
imagealphablending($temp, true);
imagesavealpha($temp, true);
$bg = imagecolorallocatealpha($temp, 0, 0, 0, 0); // Background color
imagefill($temp, 0, 0, $bg);
if ($stretch)
{
imagecopyresampled($temp, img, 0, 0, 0, 0, $width, $height, imagesx($img), imagesy($img));
}
else
{
if (imagesx($img) <= $width && imagesy($img) <= $height)
{
$fwidth = imagesx($img);
$fheight = imagesy($img);
}
else
{
$wscale = $width / imagesx($img);
$hscale = $height / imagesy($img);
$scale = min($wscale, $hscale);
$fwidth = $scale * imagesx($img);
$fheight = $scale * imagesy($img);
}
imagecopyresampled($temp,
$img,
($width - $fwidth) / 2, ($height - $fheight) / 2,
0, 0,
$fwidth, $fheight,
imagesx($img), imagesy($img)
);
}
return $temp;
}
The issue is that the image rendered is very faded
because of this line:
imagecopymerge($dest2, $src2, 0, 0, 0, 0, 460, 230, 50);
If I change the 50, which is the PCT value to 100, it shows one image with a black background (masking the other image), but if I change it to 0, it shows only the other image with a black background (masking the other image)
If the value is either 0 or 100, the image shown is at its full color though. How do I merge these 2 images together while preserving their transparency and vibrancy of color?

Answer 1

Instead of imagecopymerge use imagecopy. You also always need to correctly specify the dimensions of the source image when copying:
$dest = imagecreatefrompng('https://blzgdapipro-a.akamaihd.net/hero/ana/career-portrait.png');
$src = imagecreatefrompng('https://blzgdapipro-a.akamaihd.net/game/rank-icons/season-2/rank-6.png');
$dest2 = resize($dest, 396, 162);
imagedestroy($dest);
$src2 = resize($src, 79, 79); // should be int not float.
imagedestroy($src);
// the last 2 params must match the width/height of the $src2 image.
imagecopy($dest2, $src2, 0, 0, 0, 0, 79, 79);
imagedestroy($src2);
header('Content-Type: image/png');
imagepng($dest2);
imagedestroy($dest2);
You don't need to change the alpha settings on $dest or $src because they aren't being rendered - you render the new image resource created in, and returned by, your resize function. Because of this you do need to slightly change the function:
function resize($img, $width, $height, $stretch = false)
{
$temp = imagecreatetruecolor($width, $height);
imagealphablending($temp, false); // changed to false.
imagesavealpha($temp, true);
...
Edit:
You might be better off simply using the imagescale function instead of using your own resize function:
$dest = imagecreatefrompng('https://blzgdapipro-a.akamaihd.net/hero/ana/career-portrait.png');
$src = imagecreatefrompng('https://blzgdapipro-a.akamaihd.net/game/rank-icons/season-2/rank-6.png');
$dest2 = imagescale($dest, 396);
imagealphablending($dest2, false);
imagesavealpha($dest2, true);
$src2 = imagescale($src, 79);
imagecopy($dest2, $src2, 0, 0, 0, 0, 79, 79);
header('Content-Type: image/png');
imagepng($dest2);
imagedestroy($dest);
imagedestroy($src);
imagedestroy($dest2);
imagedestroy($src2);