if the picture is transparent, bg is whiste instead of black
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tmos
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1 changed files with 90 additions and 66 deletions
156
createthumb.php
156
createthumb.php
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@ -15,8 +15,8 @@ Community: www.minigal.dk/forum
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Please enjoy this free script!
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Version 0.3.5 modified by Sebastien SAUVAGE (sebsauvage.net):
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- Added thumbnail cache (reduces server CPU load, server bandwith and speeds up client page display).
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- Thumbnails are now always in JPEG even if the source image is PNG or GIF.
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- Added thumbnail cache (reduces server CPU load, server bandwith and speeds up client page display).
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- Thumbnails are now always in JPEG even if the source image is PNG or GIF.
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USAGE EXAMPLE:
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File: createthumb.php
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@ -31,42 +31,47 @@ if (preg_match("/.png$/i", $_GET['filename'])) header('Content-type: image/png')
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*/
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function str_split_php4( $text, $split = 1 ) {
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// place each character of the string into and array
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$array = array();
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for ( $i=0; $i < strlen( $text ); ){
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$key = NULL;
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for ( $j = 0; $j < $split; $j++, $i++ ) {
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$key .= $text[$i];
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}
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array_push( $array, $key );
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}
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return $array;
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// place each character of the string into and array
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$array = array();
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for ( $i=0; $i < strlen( $text ); )
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{
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$key = NULL;
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for ( $j = 0; $j < $split; $j++, $i++ )
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{
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$key .= $text[$i];
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}
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array_push( $array, $key );
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}
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return $array;
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}
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function sanitize($name)
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{
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// Sanitize image filename (taken from http://iamcam.wordpress.com/2007/03/20/clean-file-names-using-php-preg_replace/ )
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$fname=$name;
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$replace="_";
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$pattern="/([[:alnum:]_\.-]*)/";
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$fname=str_replace(str_split_php4(preg_replace($pattern,$replace,$fname)),$replace,$fname);
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return $fname;
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// Sanitize image filename (taken from http://iamcam.wordpress.com/2007/03/20/clean-file-names-using-php-preg_replace/ )
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$fname=$name;
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$replace="_";
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$pattern="/([[:alnum:]_\.-]*)/";
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$fname=str_replace(str_split_php4(preg_replace($pattern,$replace,$fname)),$replace,$fname);
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return $fname;
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}
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// Make sure the "thumbs" directory exists.
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if (!is_dir('thumbs')) { mkdir('thumbs',0700); }
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if (!is_dir('thumbs'))
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{
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mkdir('thumbs',0700);
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}
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// Thumbnail file name and path.
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// (We always put thumbnails in jpg for simplification)
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$thumbname = 'thumbs/'.sanitize($_GET['filename']).'.jpg';
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if (file_exists($thumbname)) // If thumbnail exists, serve it.
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if (file_exists($thumbname))// If thumbnail exists, serve it.
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{
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$fd = fopen($thumbname, "r");
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$cacheContent = fread($fd,filesize ($thumbname));
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fclose($fd);
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header('Content-type: image/jpeg');
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echo($cacheContent);
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$fd = fopen($thumbname, "r");
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$cacheContent = fread($fd,filesize ($thumbname));
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fclose($fd);
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header('Content-type: image/jpeg');
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echo($cacheContent);
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}
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else // otherwise, generate thumbnail, send it and save it to file.
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{
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@ -90,57 +95,76 @@ else // otherwise, generate thumbnail, send it and save it to file.
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$xoord = 0;
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$yoord = 0;
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if ($_GET['size'] == "") $_GET['size'] = 120; //
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$imgsize = GetImageSize($_GET['filename']);
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$width = $imgsize[0];
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$height = $imgsize[1];
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if ($width > $height) { // If the width is greater than the height it’s a horizontal picture
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$xoord = ceil(($width-$height)/2);
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$width = $height; // Then we read a square frame that equals the width
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} else {
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$yoord = ceil(($height-$width)/2);
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$height = $width;
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}
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if ($_GET['size'] == "")
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{
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$_GET['size'] = 120;
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}
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$imgsize = GetImageSize($_GET['filename']);
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$width = $imgsize[0];
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$height = $imgsize[1];
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if ($width > $height) // If the width is greater than the height it’s a horizontal picture
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{
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$xoord = ceil(($width-$height)/2);
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$width = $height; // Then we read a square frame that equals the width
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}
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else
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{
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$yoord = ceil(($height-$width)/2);
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$height = $width;
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}
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// Rotate JPG pictures
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if (preg_match("/.jpg$|.jpeg$/i", $_GET['filename'])) {
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if (function_exists('exif_read_data') && function_exists('imagerotate')) {
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// Rotate JPG pictures
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if (preg_match("/.jpg$|.jpeg$/i", $_GET['filename']))
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{
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if (function_exists('exif_read_data') && function_exists('imagerotate'))
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{
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$exif = exif_read_data($_GET['filename']);
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$ort = $exif['IFD0']['Orientation'];
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$degrees = 0;
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switch($ort)
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{
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case 6: // 90 rotate right
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$degrees = 270;
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break;
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case 8: // 90 rotate left
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$degrees = 90;
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break;
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}
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switch($ort)
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{
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case 6: // 90 rotate right
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$degrees = 270;
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break;
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case 8: // 90 rotate left
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$degrees = 90;
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break;
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}
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if ($degrees != 0) $target = imagerotate($target, $degrees, 0);
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}
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}
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$target = ImageCreatetruecolor($_GET['size'],$_GET['size']);
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if (preg_match("/.jpg$/i", $_GET['filename'])) $source = ImageCreateFromJPEG($_GET['filename']);
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if (preg_match("/.gif$/i", $_GET['filename'])) $source = ImageCreateFromGIF($_GET['filename']);
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if (preg_match("/.png$/i", $_GET['filename'])) $source = ImageCreateFromPNG($_GET['filename']);
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imagecopyresampled($target,$source,0,0,$xoord,$yoord,$_GET['size'],$_GET['size'],$width,$height);
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imagedestroy($source);
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$target = ImageCreatetruecolor($_GET['size'],$_GET['size']);
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//if (preg_match("/.jpg$/i", $_GET['filename'])) ImageJPEG($target,null,90);
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//if (preg_match("/.gif$/i", $_GET['filename'])) ImageGIF($target,null,90);
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//if (preg_match("/.png$/i", $_GET['filename'])) ImageJPEG($target,null,90); // Using ImageJPEG on purpose
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ob_start(); // Start output buffering.
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header('Content-type: image/jpeg'); // We always render the thumbnail in JPEG even if the source is GIF or PNG.
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ImageJPEG($target,null,80);
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imagedestroy($target);
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$cachedImage = ob_get_contents(); // Get the buffer content.
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ob_end_flush();// End buffering
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$fd = fopen($thumbname, "w"); // Save buffer to disk
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if ($fd) { fwrite($fd,$cachedImage); fclose($fd); }
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//if the picture can be transparent, add a white background instead a black
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if (preg_match("/.gif$/i", $_GET['filename']) || preg_match("/.png$/i", $_GET['filename']))
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{
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$backgroundColor = imagecolorallocate($target, 255, 255, 255);
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imagefill($target, 0, 0, $backgroundColor);
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}
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if (preg_match("/.jpg$/i", $_GET['filename'])) $source = ImageCreateFromJPEG($_GET['filename']);
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if (preg_match("/.gif$/i", $_GET['filename'])) $source = ImageCreateFromGIF($_GET['filename']);
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if (preg_match("/.png$/i", $_GET['filename'])) $source = ImageCreateFromPNG($_GET['filename']);
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imagecopyresampled($target,$source,0,0,$xoord,$yoord,$_GET['size'],$_GET['size'],$width,$height);
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imagedestroy($source);
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//if (preg_match("/.jpg$/i", $_GET['filename'])) ImageJPEG($target,null,90);
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//if (preg_match("/.gif$/i", $_GET['filename'])) ImageGIF($target,null,90);
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//if (preg_match("/.png$/i", $_GET['filename'])) ImageJPEG($target,null,90); // Using ImageJPEG on purpose
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ob_start(); // Start output buffering.
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header('Content-type: image/jpeg'); // We always render the thumbnail in JPEG even if the source is GIF or PNG.
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ImageJPEG($target,null,80);
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imagedestroy($target);
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$cachedImage = ob_get_contents(); // Get the buffer content.
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ob_end_flush();// End buffering
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$fd = fopen($thumbname, "w"); // Save buffer to disk
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if ($fd)
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{
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fwrite($fd,$cachedImage);
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fclose($fd);
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}
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}
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?>
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