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  #1  
Old
Aspiring Evangelist
 
Join Date: Sep 2003
Location: Montreal, Canada
Posts: 373

GD resize transparent GIF question


Hello there,

I have a slight problem.
I'm using GD to resize some transparent gifs. And the way it displays the transparancy is bugging me.

Instead of beeing transparent, it displays the black transparancy color.

Is there a way to make it display a white background whenever there is transparancy? Instead of black?

Here is the code:

PHP Code:
<?php

$image 
$_GET['i'];
$max_width $_GET['w'];
$max_height $_GET['h'];

$picture_location $image;

$picture_save str_replace($image, array(".jpg"".gif"".png"), ".temp");

$im_size GetImageSize $picture_location);
$imageWidth $im_size[0];
$imageHeight $im_size[1];

if (
eregi('.jpg'$picture_location)) { //If file is a JPG
  
$im2 ImageCreateFromJPEG($picture_location);
} elseif (
eregi('.gif'$picture_location)) { //If file is a GIF
  
$im2 ImageCreateFromGIF($picture_location);
} elseif (
eregi('.png'$picture_location)) { //If file is a PNG
  
$im2 ImageCreateFromPNG($picture_location);
}

$x_ratio $max_width $imageWidth;
$y_ratio $max_height $imageHeight;

if ( (
$imageWidth <= $max_width) || ($imageHeight <= $max_height) ) {
  
$tn_width $imageWidth;
  
$tn_height $imageWeight;
}

if ((
$x_ratio $imageHeight) < $max_height) {
  
$tn_height ceil($x_ratio $imageHeight);
  
$tn_width $max_width;
}
else {
  
$tn_width ceil($y_ratio $imageWidth);
  
$tn_height $max_height;
}

$im imageCreateTrueColor$tn_width$tn_height );

ImageCopyResampled ($im,$im20000$tn_width$tn_height,$imageWidth$imageHeight);
if (
eregi('.jpg'$picture_location)) { //If file is a JPG
  
Header("Content-type: image/jpeg");
  
Imagejpeg($im,'',100); //to print to screen
  
Imagejpeg($im,$picture_save,100);
} elseif (
eregi('.gif'$picture_location)) { //If file is a GIF
  
Header("Contrnt-type: image/gif");
  
Imagegif($im,'',100);
  
Imagegif($im,$picture_save,100);
} elseif (
eregi('.png'$picture_location)) { //If file is a PNG
  
Header("Content-type: image/png");
  
Imagepng($im,'',100);
  
Imagepng($im,$picture_save,100);
}


ImageDestroy($im);
ImageDestroy ($im2);

?>
Thank You



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  #2  
Old
Aspiring Evangelist
 
Join Date: Sep 2003
Location: Montreal, Canada
Posts: 373
Ops, wrong forum... Can mod move pelase.

  #3  
Old
Community Liaison 2.0
 
Join Date: Feb 2005
Location: Australia
Posts: 5,816
Black is the default background colour for truecolour images. Try using imagefill to fill the new image with white before copyresampled.

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  #4  
Old
Aspiring Evangelist
 
Join Date: Sep 2003
Location: Montreal, Canada
Posts: 373
2 lines of code was all that it took
Thanks alot foobic

Problem: Solved

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