Ability to strip excess data (commonly ZIP archives) from images.
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@ -53,6 +53,15 @@
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define('MAX_WIDTH', 10000);
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define('MAX_HEIGHT', MAX_WIDTH);
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/**
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Redraw the image using GD functions to strip any excess data (commonly ZIP archives)
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WARNING: Very beta. Currently strips animated GIFs too :(
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**/
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define('REDRAW_IMAGE', true);
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// Redrawing configuration
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define('JPEG_QUALITY', 100);
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define('DIR_IMG', 'src/');
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define('DIR_THUMB', 'thumb/');
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define('DIR_RES', 'res/');
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@ -309,28 +309,28 @@
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return $res;
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}
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function resize($type, $source_pic, $destination_pic, $max_width, $max_height) {
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$return = Array();
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function createimage($type, $source_pic) {
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switch($type) {
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case 'jpg':
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case 'jpeg':
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$src = imagecreatefromjpeg($source_pic);
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return imagecreatefromjpeg($source_pic);
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break;
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case 'png':
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$src = imagecreatefrompng($source_pic);
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return imagecreatefrompng($source_pic);
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break;
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case 'gif':
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$src = imagecreatefromgif($source_pic);
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return imagecreatefromgif($source_pic);
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break;
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case 'bmp':
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$src = imagecreatefrombmp($source_pic);
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return imagecreatefrombmp($source_pic);
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break;
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default:
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error('Unknwon file extension.');
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}
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list($width,$height)=getimagesize($source_pic);
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}
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function resize($src, $width, $height, $destination_pic, $max_width, $max_height) {
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$return = Array();
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$x_ratio = $max_width / $width;
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$y_ratio = $max_height / $height;
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@ -362,4 +362,85 @@
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return $return;
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}
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function imagebmp(&$img, $filename=""){
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$widthOrig = imagesx($img);
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// width = 16*x
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$widthFloor = ((floor($widthOrig/16))*16);
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$widthCeil = ((ceil($widthOrig/16))*16);
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$height = imagesy($img);
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$size = ($widthCeil*$height*3)+54;
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// Bitmap File Header
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$result = 'BM'; // header (2b)
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$result .= int_to_dword($size); // size of file (4b)
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$result .= int_to_dword(0); // reserved (4b)
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$result .= int_to_dword(54); // byte location in the file which is first byte of IMAGE (4b)
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// Bitmap Info Header
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$result .= int_to_dword(40); // Size of BITMAPINFOHEADER (4b)
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$result .= int_to_dword($widthCeil); // width of bitmap (4b)
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$result .= int_to_dword($height); // height of bitmap (4b)
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$result .= int_to_word(1); // biPlanes = 1 (2b)
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$result .= int_to_word(24); // biBitCount = {1 (mono) or 4 (16 clr ) or 8 (256 clr) or 24 (16 Mil)} (2b)
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$result .= int_to_dword(0); // RLE COMPRESSION (4b)
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$result .= int_to_dword(0); // width x height (4b)
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$result .= int_to_dword(0); // biXPelsPerMeter (4b)
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$result .= int_to_dword(0); // biYPelsPerMeter (4b)
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$result .= int_to_dword(0); // Number of palettes used (4b)
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$result .= int_to_dword(0); // Number of important colour (4b)
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// is faster than chr()
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$arrChr = array();
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for($i=0; $i<256; $i++){
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$arrChr[$i] = chr($i);
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}
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// creates image data
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$bgfillcolor = array("red"=>0, "green"=>0, "blue"=>0);
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// bottom to top - left to right - attention blue green red !!!
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$y=$height-1;
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for ($y2=0; $y2<$height; $y2++) {
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for ($x=0; $x<$widthFloor; ) {
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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$rgb = imagecolorsforindex($img, imagecolorat($img, $x++, $y));
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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}
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for ($x=$widthFloor; $x<$widthCeil; $x++) {
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$rgb = ($x<$widthOrig) ? imagecolorsforindex($img, imagecolorat($img, $x, $y)) : $bgfillcolor;
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$result .= $arrChr[$rgb["blue"]].$arrChr[$rgb["green"]].$arrChr[$rgb["red"]];
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}
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$y--;
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}
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// see imagegif
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if($filename==""){
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echo $result;
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} else {
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$file = fopen($filename, "wb");
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fwrite($file, $result);
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fclose($file);
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}
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}
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// imagebmp helpers
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function int_to_dword($n){
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return chr($n & 255).chr(($n >> 8) & 255).chr(($n >> 16) & 255).chr(($n >> 24) & 255);
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}
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function int_to_word($n){
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return chr($n & 255).chr(($n >> 8) & 255);
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}
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?>
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26
post.php
26
post.php
@ -130,8 +130,32 @@
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$post['filehash'] = md5_file($post['file']);
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$post['filesize'] = filesize($post['file']);
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$image = createimage($post['extension'], $post['file']);
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if(REDRAW_IMAGE) {
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switch($post['extension']) {
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case 'jpg':
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case 'jpeg':
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imagejpeg($image, $post['file'], JPEG_QUALITY);
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break;
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case 'png':
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imagepng($image, $post['file'], 7);
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break;
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case 'gif':
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imagegif($image, $post['file']);
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break;
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case 'bmp':
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imagebmp($image, $post['file']);
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break;
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default:
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error('Unknwon file extension.');
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}
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}
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// Create a thumbnail
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$thumb = resize($post['extension'], $post['file'], $post['thumb'], THUMB_WIDTH, THUMB_HEIGHT);
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$thumb = resize($image, $post['width'], $post['height'], $post['thumb'], THUMB_WIDTH, THUMB_HEIGHT);
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$post['thumbwidth'] = $thumb['width'];
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$post['thumbheight'] = $thumb['height'];
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}
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