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POFix png transparency problem
 

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  1. POFix png transparency problem
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    <p>I use this class to upload images on my server. The problem is that when I upload transparent png images, the transparent parts get black. Is there a way to keep transparency in png images?</p> <pre><code>class SimpleImage { var $image; var $image_type; function load($filename) { $image_info = getimagesize($filename); $this-&gt;image_type = $image_info[2]; if( $this-&gt;image_type == IMAGETYPE_JPEG ) { $this-&gt;image = imagecreatefromjpeg($filename); } elseif( $this-&gt;image_type == IMAGETYPE_GIF ) { $this-&gt;image = imagecreatefromgif($filename); } elseif( $this-&gt;image_type == IMAGETYPE_PNG ) { $this-&gt;image = imagecreatefrompng($filename); } } function save($filename, $image_type=IMAGETYPE_JPEG, $compression=100, $permissions=null) { if( $image_type == IMAGETYPE_JPEG ) { imagejpeg($this-&gt;image,$filename,$compression); } elseif( $image_type == IMAGETYPE_GIF ) { imagegif($this-&gt;image,$filename); } elseif( $image_type == IMAGETYPE_PNG ) { imagepng($this-&gt;image,$filename); } if( $permissions != null) { chmod($filename,$permissions); } } function output($image_type=IMAGETYPE_JPEG) { if( $image_type == IMAGETYPE_JPEG ) { imagejpeg($this-&gt;image); } elseif( $image_type == IMAGETYPE_GIF ) { imagegif($this-&gt;image); } elseif( $image_type == IMAGETYPE_PNG ) { imagepng($this-&gt;image); } } function getWidth() { return imagesx($this-&gt;image); } function getHeight() { return imagesy($this-&gt;image); } function resizeToHeight($height) { $ratio = $height / $this-&gt;getHeight(); $width = $this-&gt;getWidth() * $ratio; $this-&gt;resize($width,$height); } function resizeToWidth($width) { $ratio = $width / $this-&gt;getWidth(); $height = $this-&gt;getheight() * $ratio; $this-&gt;resize($width,$height); } function scale($scale) { $width = $this-&gt;getWidth() * $scale/100; $height = $this-&gt;getheight() * $scale/100; $this-&gt;resize($width,$height); } function resize($width,$height) { $new_image = imagecreatetruecolor($width, $height); imagecopyresampled($new_image, $this-&gt;image, 0, 0, 0, 0, $width, $height, $this-&gt;getWidth(), $this-&gt;getHeight()); $this-&gt;image = $new_image; } } </code></pre>
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    1. PO
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    1. PTQuestion
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    1. USKing Julien
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    2. PL
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    1. This table or related slice is empty.
    1. PO
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    2. PO
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    3. PO
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    1. COLooks like this has already been answered on stackoverflow: http://stackoverflow.com/questions/279236/how-do-i-resize-pngs-with-transparency-in-php
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      1. POFix png transparency problem
      1. USBen Lee
 

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