PHP - Png Transparency

I am having difficulty keeping transparency on my png resizing function.  I have searched all around and tried various solutions.  However, all I keep getting is a black background.  Everything else about the function is working fine.  Any help would be appreciated.

Here is the code for transparency that isn't working:
Code: [Select]
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagealphablending($dst_img,false);
imagesavealpha($dst_img,true);
$transparent = imagecolorallocatealpha($dst_img, 255, 255, 255, 127);
imagefilledrectangle($dst_img, 0, 0, $thumb_w, $thumb_h, $transparent);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
Here is the full function code:
Code: [Select]
function createthumb($name,$filename,$new_w,$new_h)
{
$system=explode(".",$name);
if (preg_match("/jpg|jpeg/",$system[1]))
{
$src_img=imagecreatefromjpeg($name);
}
if (preg_match("/png/",$system[1]))
{
$src_img=imagecreatefrompng($name);
}
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x > $old_y)
{
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x < $old_y)
{
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y)
{
$thumb_w=$new_w;
$thumb_h=$new_h;
}
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagealphablending($dst_img,false);
imagesavealpha($dst_img,true);
$transparent = imagecolorallocatealpha($dst_img, 255, 255, 255, 127);
imagefilledrectangle($dst_img, 0, 0, $thumb_w, $thumb_h, $transparent);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);

if (preg_match("/png/",$system[1]))
{
imagepng($dst_img,$filename);
} else {
imagejpeg($dst_img,$filename);
}
imagedestroy($dst_img);
imagedestroy($src_img);
}

I have a transparency color set up with my GD script.  It makes the image semi transparent with an ugly border.  Any tips or Hints?
Page:  http://www.zeldadungeon.net/Justin/miniheros/test.php
Code: [Select]
<?
$bg = imagecreatefrompng('http://i241.photobucket.com/albums/ff279/tiger_leo/reddraft.png');

$color = imagecolorallocate($bg, 168, 97, 97);

$font = './BOOKOS.TTF';

$insert = imagecreatefrompng('http://i241.photobucket.com/albums/ff279/tiger_leo/heartdraft.png');
imagealphablending($insert, true);
imagesavealpha($insert, true);

 
$xOffset = 20;   $yOffset = 20;

imagecolortransparent($insert, $color);

$insert_x = imagesx($insert); $insert_y = imagesy($insert); 

header('Content-Type: image/png');

imagecopymerge($bg,$insert,$xOffset,$yOffset,0,0,$insert_x,$insert_y,100);

imagepng($bg);
imagedestroy($bg); 

?>

So basically I have two lines that generate an image from png and then preserve the transparency of said png.
Code: [Select]
$bub1 = imagecreatefrompng ("Energy/$energy1b.png");

imageSaveAlpha($bub1, true);This works by itself when generating just this image.
But when combined with another image:
Code: [Select]
imagecopymerge($image, $bub1, 680, 40, 0, 0, 50, 50, 100);It fills in the back ground around the image and the transparency is not preserved. 
Why is this and how can i fix it?

Im trying to make a script that previews the level for a game, but im having issues with transparency and the rotation of each image.

you can see the problem he http://beta.trackmill.com/DUI/preview/

here is the php file

<?php
header('Content-Type: image/png');
$image = imagecreatefrompng('images/Background.png');

function radiansToDegrees($radians)
{
    return $radians * 180 / pi();
}
$map = file_get_contents('map.txt');
$blocks = split("<obj", $map);
for($i=2; $i<count($blocks); $i++)
{
$arg = split(" ", $blocks[$i]);
$n = str_replace("n", "", str_replace("=", "", str_replace('"', "", $arg[1])));
$x = str_replace("x", "", str_replace("=", "", str_replace('"', "", $arg[2])));
$x = $x * 20 - 13;
$y = str_replace("y", "", str_replace("=", "", str_replace('"', "", $arg[3])));
$y = $y * 22 + 15;
$a = str_replace("a", "", str_replace("=", "", str_replace('"', "", $arg[4])));
$a = radiansToDegrees($a);
$t = str_replace("t", "", str_replace("=", "", str_replace('"', "", $arg[5])));
$e = str_replace("e", "", str_replace("=", "", str_replace('"', "", $arg[6])));
$f = str_replace("f", "", str_replace("=", "", str_replace('"', "", str_replace('/>', "", $arg[7]))));
$blockimage = imagecreatefrompng("images/$n.png");

$blockimage = imagerotate($blockimage, -$a, 0, 0) ;
imagealphablending($blockimage, false);
imagesavealpha($blockimage, true);

imagecopy($image, $blockimage, $x, $y, 0, 0, imagesx($blockimage), imagesy($blockimage));
//echo "$i | $n - $x - $y - $a - $t - $e - $f <br>";
}

imagepng($image);
imagedestroy($image);
?>


if you require the .zip containing the images etc, just reply and i will upload it as soon as possible

I have tried many solution, but nothing seems to fix this.
The problem is that i put an image with transparency on top of another image, but the transparent pixels still transparent, where they should show some of the image below it.

If you call it with l=100 and p=20 i would get this result http://cl.ly/566Z instead of this http://cl.ly/56OF.

Here is the source code and I have attached the images:
Code: [Select]
<?php
header('Content-type: image/png');
echo imagepng(progressbar($_GET['l'], $_GET['p']));
function progressbar($length, $percentage)
{
$length = round($length / 2) * 2;
$percentage = min(100, max(0, $percentage));
if($length > 0)
{
$bar = imagecreate($length, 14);
imagealphablending($bar, false);
imagesavealpha($bar, true);
$empty = imagecreatefrompng('Empty.png');
imagealphablending($empty, false);
imagesavealpha($empty, true);
$fill = imagecreatefrompng('Fill.png');
imagealphablending($fill, false);
imagesavealpha($fill, true);
$lempty = imagecreatefrompng('LeftEmpty.png');
imagealphablending($lempty, false);
imagesavealpha($lempty, true);
$lfill = imagecreatefrompng('LeftFill.png');
imagealphablending($lfill, false);
imagesavealpha($lfill, true);
$rempty = imagecreatefrompng('RightEmpty.png');
imagealphablending($rempty, false);
imagesavealpha($rempty, true);
$rfill = imagecreatefrompng('RightFill.png');
imagealphablending($rfill, false);
imagesavealpha($rfill, true);
$emptycaplength = min(7, $length / 2); //5 
imagecopy($bar, $lempty, 0, 0, 0, 0, $emptycaplength, 14);
imagecopy($bar, $rempty, $length - $emptycaplength, 0, 7 - $emptycaplength, 0, $emptycaplength, 14);
if($length > 14)
{
imagecopyresized($bar, $empty, 7, 0, 0, 0, $length - 14, 14, 1, 14);
}
$filllength = round(($length * ($percentage / 100)) / 2) * 2;
$fillcaplength = min(7, $filllength / 2);
imagecopy($bar, $lfill, 0, 0, 0, 0, $fillcaplength, 14);
imagecopy($bar, $rfill, $filllength - $fillcaplength, 0, 7 - $fillcaplength, 0, $fillcaplength, 14);
if($filllength > 14)
{
imagecopyresized($bar, $fill, 7, 0, 0, 0, $filllength - 14, 14, 1, 14);
}
imagealphablending($bar, true);
return $bar;
}
else
{
return false;
}
}
?>

I have the following code, works rotates the image. But it seems to lose its transparency and add color when rotated to say 45. How can I avoid this?


// File and rotation
$filename = 'placeholder.png';
$degrees = 45;

// Content type
header('Content-type: image/png');

// Load
$source = imagecreatefrompng($filename);


// Rotate
$rotate = imagerotate($source, $degrees, 0);

// Output
imagepng($rotate);
?>