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@dperini
Created Aug 22, 2010
Embed
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<?php
/*
* Author: Diego Perini <diego.perini@gmail.com>
*
* this is what I have in my build system to embed
* the packed version of NWMatcher in a PNG file;
* actually any data like JSON or XML can be
* transported in compressed PNG files and
* avoids HTTP compression requirements.
*
* Here is the javascript decoder:
*
* // decodes and execute Javascript
* // code embedded in a PNG8 image
* function getDataPNG(g,k){
* var o;(o=new Image).src=g;
* o.onload=function(){
* var a,b,c,d,e,f='',
* x=o.width,y=o.height;
* c=document.createElement('canvas');
* e=c.getContext('2d');c.width=x;c.height=y;
* e.drawImage(o,0,0);d=e.getImageData(0,0,x,y).data;
* for(a=0;b=d[a];a+=4){f+=String.fromCharCode(b);}k(f)();
* };
* }
*
* // usage:
* // forget about the toString.constructor
* // just pass the path to your local js/png file
* getDataPNG('dist/nwmatcher.png', toString.constructor);
*
*/
$filename = 'dist/nwmatcher-pac.js';
if (file_exists($filename)) {
$size = filesize($filename);
$width = ceil(sqrt($size / 1));
$height = $width - 1;
$im = imagecreate($width, $height);
$fs = fopen($filename, 'r');
$data = fread($fs, $size);
fclose($fs);
$i = 0;
$colors = array();
for ($y = 0; $height > $y; ++$y) {
for ($x = 0; $width > $x; ++$x) {
if ($i < $size) {
$byte = ord($data[$i]);
if (!isset($colors[$byte])) {
$colors[$byte] = imagecolorallocate($im, $byte, $byte, $byte);
}
$color = $colors[$byte];
imagesetpixel($im, $x, $y, $color);
++$i;
}
}
}
header('Content-Type: image/png');
imagepng($im, NULL, 9);
imagedestroy($im);
}
?>
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