mirror of
https://github.com/WhatCD/Gazelle.git
synced 2024-12-13 02:46:30 +00:00
103 lines
2.7 KiB
PHP
103 lines
2.7 KiB
PHP
<?
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// Functions and headers needed by the image proxy
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error_reporting(E_COMPILE_ERROR|E_RECOVERABLE_ERROR|E_ERROR|E_CORE_ERROR);
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if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
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header("HTTP/1.1 304 Not Modified");
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die();
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}
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header('Expires: '.date('D, d-M-Y H:i:s \U\T\C', time() + 3600 * 24 * 120)); // 120 days
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header('Last-Modified: '.date('D, d-M-Y H:i:s \U\T\C', time()));
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if (!extension_loaded('gd')) {
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error('nogd');
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}
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function img_error($Type) {
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header('Content-type: image/gif');
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die(file_get_contents(SERVER_ROOT.'/sections/image/'.$Type.'.gif'));
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}
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function invisible($Image) {
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$Count = imagecolorstotal($Image);
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if ($Count == 0) {
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return false;
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}
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$TotalAlpha = 0;
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for ($i = 0; $i < $Count; ++$i) {
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$Color = imagecolorsforindex($Image, $i);
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$TotalAlpha += $Color['alpha'];
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}
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return (($TotalAlpha / $Count) == 127) ? true : false;
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}
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function verysmall($Image) {
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return ((imagesx($Image) * imagesy($Image)) < 25) ? true : false;
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}
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function image_type($Data) {
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if (!strncmp($Data, 'GIF', 3)) {
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return 'gif';
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}
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if (!strncmp($Data, pack('H*', '89504E47'), 4)) {
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return 'png';
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}
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if (!strncmp($Data, pack('H*', 'FFD8'), 2)) {
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return 'jpeg';
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}
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if (!strncmp($Data, 'BM', 2)) {
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return 'bmp';
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}
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if (!strncmp($Data, 'II', 2) || !strncmp($Data, 'MM', 2)) {
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return 'tiff';
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}
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}
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function image_height($Type, $Data) {
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$Length = strlen($Data);
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global $URL, $_GET;
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switch ($Type) {
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case 'jpeg':
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// See http://www.obrador.com/essentialjpeg/headerinfo.htm
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$i = 4;
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$Data = (substr($Data, $i));
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$Block = unpack('nLength', $Data);
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$Data = substr($Data, $Block['Length']);
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$i += $Block['Length'];
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$Str []= "Started 4, + ".$Block['Length'];
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while ($Data != '') { // iterate through the blocks until we find the start of frame marker (FFC0)
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$Block = unpack('CBlock/CType/nLength', $Data); // Get info about the block
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if ($Block['Block'] != '255') { // We should be at the start of a new block
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break;
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}
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if ($Block['Type'] != '192') { // C0
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$Data = substr($Data, $Block['Length'] + 2); // Next block
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$Str []= "Started $i, + ".($Block['Length'] + 2);
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$i += ($Block['Length'] + 2);
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} else { // We're at the FFC0 block
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$Data = substr($Data, 5); // Skip FF C0 Length(2) precision(1)
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$i += 5;
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$Height = unpack('nHeight', $Data);
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return $Height['Height'];
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}
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}
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break;
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case 'gif':
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$Data = substr($Data, 8);
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$Height = unpack('vHeight', $Data);
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return $Height['Height'];
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case 'png':
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$Data = substr($Data, 20);
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$Height = unpack('NHeight', $Data);
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return $Height['Height'];
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default:
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return 0;
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}
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}
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define('SKIP_NO_CACHE_HEADERS', 1);
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require('classes/script_start.php'); // script_start contains all we need and includes sections/image/index.php
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?>
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