525 lines
19 KiB
PHP
Executable File
525 lines
19 KiB
PHP
Executable File
<?php
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$orig_srcpath='../tests/tiger.png'; // as specified in your file (could be full URL)
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$file = 'http://127.0.0.1/MPDF1.com/common/mpdf/tests/tiger.png'; // Full URL
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$fileIsLocal = true; // is the file in the same domain?
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//======================================================================
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$ppUx = 0;
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$type = '';
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$data = '';
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echo 'File: ' .$orig_srcpath . '<br />';
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echo 'Full File URL: ' .$file . '<br />';
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if ($orig_srcpath && $fileIsLocal && $check = @fopen($orig_srcpath,"rb")) {
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fclose($check);
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$file=$orig_srcpath;
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$data = file_get_contents($file);
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$type = _imageTypeFromString($data);
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echo 'File accessed using fopen on $orig_srcpath' . '<br />';
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}
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if (!$data && $check = @fopen($file,"rb")) {
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fclose($check);
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$data = file_get_contents($file);
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$type = _imageTypeFromString($data);
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echo 'File accessed using fopen on $file' . '<br />';
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}
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if ((!$data || !$type) && !ini_get('allow_url_fopen') ) { // only worth trying if remote file and !ini_get('allow_url_fopen')
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file_get_contents_by_socket($file, $data); // needs full url?? even on local (never needed for local)
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if ($data) { $type = _imageTypeFromString($data); }
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echo 'File accessed using socket ' . '<br />';
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}
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if ((!$data || !$type) && !ini_get('allow_url_fopen') && function_exists("curl_init")) {
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file_get_contents_by_curl($file, $data); // needs full url?? even on local (never needed for local)
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if ($data) { $type = _imageTypeFromString($data); }
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echo 'File accessed using cURL ' . '<br />';
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}
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if (!$data) { echo 'Could not access image file' . '<br />'; exit; }
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echo 'Image type determined: ' .strtoupper($type) . '<br />';
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// JPEG
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if ($type == 'jpeg' || $type == 'jpg') {
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$hdr = _jpgHeaderFromString($data);
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if (!$hdr) { echo 'Error parsing JPG header' . '<br />'; exit; }
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$a = _jpgDataFromHeader($hdr);
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$channels = intval($a[4]);
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echo 'Width: ' . $a[0]. '<br />';
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echo 'Height: ' . $a[1]. '<br />';
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echo 'Colorspace: ' . $a[2]. '<br />';
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echo 'BPC (bits per channel): ' . $a[3]. '<br />';
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echo 'Channels: ' . $channels. '<br />';
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$j = strpos($data,'JFIF');
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if ($j) {
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//Read resolution
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$unitSp=ord(substr($data,($j+7),1));
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if ($unitSp > 0) {
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$ppUx=_twobytes2int(substr($data,($j+8),2)); // horizontal pixels per meter, usually set to zero
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if ($unitSp == 2) { // = dots per cm (if == 1 set as dpi)
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$ppUx=round($ppUx/10 *25.4);
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}
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}
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echo 'Resolution ppUx: ' . $ppUx. '<br />';
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}
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else echo 'JFIF not found in header' . '<br />';
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// mPDF 6 ICC profile
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$offset = 0;
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$icc = array();
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while (($pos = strpos($data, "ICC_PROFILE\0", $offset)) !== false) {
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// get ICC sequence length
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$length = _twobytes2int(substr($data, ($pos - 2),2)) - 16;
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$sn = max(1, ord($data[($pos + 12)]));
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$nom = max(1, ord($data[($pos + 13)]));
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$icc[($sn - 1)] = substr($data, ($pos + 14), $length);
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$offset = ($pos + 14 + $length);
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}
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// order and compact ICC segments
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if (count($icc) > 0) {
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echo 'ICC profile present' . '<br />';
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ksort($icc);
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$icc = implode('', $icc);
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if (substr($icc, 36, 4) != 'acsp') {
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// invalid ICC profile
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echo 'ICC profile INVALID (no acsp flag)' . '<br />';
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}
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$input = substr($icc, 16, 4);
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$output = substr($icc, 20, 4);
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echo 'ICC profile Input: ' . $input. '<br />';
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echo 'ICC profile Output: ' . $output. '<br />';
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// Ignore Color profiles for conversion to other colorspaces e.g. CMYK/Lab
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if ($input != 'RGB ' || $output != 'XYZ ') { echo 'ICC profile ignored by mPDF' . '<br />'; }
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}
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}
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// PNG
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else if ($type == 'png') {
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//Check signature
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if(substr($data,0,8)!=chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {
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echo 'Error parsing PNG identifier<br />'; exit;
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}
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//Read header chunk
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if(substr($data,12,4)!='IHDR') {
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echo 'Incorrect PNG file (no IHDR block found)<br />'; exit;
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}
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$w=_fourbytes2int(substr($data,16,4));
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$h=_fourbytes2int(substr($data,20,4));
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$bpc=ord(substr($data,24,1));
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$errpng = false;
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$pngalpha = false;
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$channels = 0;
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echo 'Width: ' .$w . '<br />';
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echo 'Height: ' .$h . '<br />';
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echo 'BPC (bits per channel): ' .$bpc . '<br />';
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$ct=ord(substr($data,25,1));
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if($ct==0) { $colspace='DeviceGray'; $channels = 1; }
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elseif($ct==2) { $colspace='DeviceRGB'; $channels = 3; }
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elseif($ct==3) { $colspace='Indexed'; $channels = 1; }
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elseif($ct==4) { $colspace='DeviceGray'; $channels = 1; $errpng = 'alpha channel'; $pngalpha = true; }
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else { $colspace='DeviceRGB'; $channels = 3; $errpng = 'alpha channel'; $pngalpha = true; }
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echo 'Colorspace: ' . $colspace. '<br />';
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echo 'Channels: ' . $channels. '<br />';
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if ($pngalpha) echo 'Alpha channel detected'. '<br />';
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if ($ct < 4 && strpos($data,'tRNS')!==false) { echo 'Transparency detected'. '<br />'; $errpng = 'transparency'; $pngalpha = true;}
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if ($ct == 3 && strpos($data,'iCCP')!==false) { echo 'Indexed plus ICC'. '<br />'; $errpng = 'indexed plus ICC'; }
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if(ord(substr($data,26,1))!=0) { echo 'compression method not set to zero<br />'; $errpng = 'compression method'; } // only 0 should be specified
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if(ord(substr($data,27,1))!=0) { echo 'filter method not set to zero<br />'; $errpng = 'filter method'; } // only 0 should be specified
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if(ord(substr($data,28,1))!=0) { echo 'interlaced file not set to zero<br />'; $errpng = 'interlaced file'; }
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$j = strpos($data,'pHYs');
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if ($j) {
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//Read resolution
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$unitSp=ord(substr($data,($j+12),1));
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if ($unitSp == 1) {
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$ppUx=_fourbytes2int(substr($data,($j+4),4)); // horizontal pixels per meter, usually set to zero
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$ppUx=round($ppUx/1000 *25.4);
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}
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echo 'Resolution ppUx: ' . $ppUx. '<br />';
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}
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// mPDF 6 Gamma correction
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$gamma_correction = 0;
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$gAMA = 0;
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$j = strpos($data,'gAMA');
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if ($j && strpos($data,'sRGB')===false) { // sRGB colorspace - overrides gAMA
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$gAMA=_fourbytes2int(substr($data,($j+4),4)); // Gamma value times 100000
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$gAMA /= 100000;
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}
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if ($gAMA) { $gamma_correction = 1/$gAMA; }
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// Don't need to apply gamma correction if == default i.e. 2.2
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if ($gamma_correction > 2.15 && $gamma_correction < 2.25) { $gamma_correction = 0; }
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if ($gamma_correction) { echo 'Gamma correction detected'. '<br />'; }
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// NOT supported at present
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if (strpos($data,'sRGB')!==false) echo 'sRGB colorspace - NOT supported at present'. '<br />';
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if (strpos($data,'cHRM')!==false) echo 'Chromaticity and Whitepoint - NOT supported at present'. '<br />';
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if (($errpng || $pngalpha || $gamma_correction)) {
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if (function_exists('gd_info')) { $gd = gd_info(); }
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else {$gd = array(); }
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if (!isset($gd['PNG Support'])) { echo 'GD library required for PNG image ('.$errpng.')'. '<br />';}
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$im = imagecreatefromstring($data);
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if (!$im) { echo 'Error creating GD image from PNG file ('.$errpng.')'. '<br />';}
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$w = imagesx($im);
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$h = imagesy($im);
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if ($im) {
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// Alpha channel set (including using tRNS for Paletted images)
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if ($pngalpha) {
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echo 'Alpha channel will be used by mPDF (including when tRNS present in Paletted images)<br />';
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if ($colspace=='Indexed') { echo '...Generating Alpha channel values from tRNS (Indexed)<br />'; }
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else if ($ct===0 || $ct==2) { echo '...Generating Alpha channel values from tRNS (non-Indexed)<br />'; }
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else { echo '...Extracting Alpha channel<br />'; }
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}
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else { // No alpha/transparency set (but cannot read directly because e.g. bit-depth != 8, interlaced etc)
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echo 'No alpha/transparency set (but cannot read directly because e.g. bit-depth != 8, interlaced etc)<br />';
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// ICC profile
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$icc = false;
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$p = strpos($data,'iCCP');
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if ($p && $colspace=="Indexed") {
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$p += 4;
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$n=_fourbytes2int(substr($data,($p-8),4));
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$nullsep = strpos(substr($data,$p,80), chr(0));
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$icc = substr($data, ($p+$nullsep+2), ($n-($nullsep+2)) );
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// Test if file is gzcompressed
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if (ord(substr($str, 0, 1)) == 0x1f && ord(substr($str, 1, 1)) == 0x8b) {
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$icc = @gzuncompress($icc); // Ignored if fails
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}
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if ($icc) {
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echo 'ICC profile present' . '<br />';
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if (substr($icc, 36, 4) != 'acsp') { echo 'ICC profile INVALID (no acsp flag)' . '<br />'; $icc = false; } // invalid ICC profile
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else {
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$input = substr($icc, 16, 4);
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$output = substr($icc, 20, 4);
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echo 'ICC profile Input: ' . $input. '<br />';
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echo 'ICC profile Output: ' . $output. '<br />';
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// Ignore Color profiles for conversion to other colorspaces e.g. CMYK/Lab
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if ($input != 'RGB ' || $output != 'XYZ ') { $icc = false; echo 'ICC profile ignored by mPDF' . '<br />'; }
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}
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}
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// Convert to RGB colorspace so can use ICC Profile
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if ($icc) { echo 'ICC profile and Indexed colorspace both present - need to Convert to RGB colorspace so can use ICC Profile<br />'; }
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}
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}
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}
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echo 'PNG Image parsed on second pass' . '<br />';
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// SECOND PASS
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imagealphablending($im, false);
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imagesavealpha($im, false);
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imageinterlace($im, false);
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ob_start();
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$check = @imagepng($im);
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if (!$check) { echo 'Error creating temporary image object whilst using GD library to parse PNG image' . '<br />'; }
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$data = ob_get_contents();
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ob_end_clean();
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if (!$data) { echo 'Error parsing temporary file image object created with GD library to parse PNG image' . '<br />'; }
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imagedestroy($im);
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//Check signature
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if(substr($data,0,8)!=chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {
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echo 'Error parsing PNG identifier<br />'; exit;
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}
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//Read header chunk
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if(substr($data,12,4)!='IHDR') {
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echo 'Incorrect PNG file (no IHDR block found)<br />'; exit;
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}
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$w=_fourbytes2int(substr($data,16,4));
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$h=_fourbytes2int(substr($data,20,4));
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$bpc=ord(substr($data,24,1));
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$errpng = false;
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$pngalpha = false;
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$channels = 0;
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echo 'Width: ' .$w . '<br />';
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echo 'Height: ' .$h . '<br />';
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echo 'BPC (bits per channel): ' .$bpc . '<br />';
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$ct=ord(substr($data,25,1));
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if($ct==0) { $colspace='DeviceGray'; $channels = 1; }
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elseif($ct==2) { $colspace='DeviceRGB'; $channels = 3; }
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elseif($ct==3) { $colspace='Indexed'; $channels = 1; }
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elseif($ct==4) { $colspace='DeviceGray'; $channels = 1; $errpng = 'alpha channel'; $pngalpha = true; }
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else { $colspace='DeviceRGB'; $channels = 3; $errpng = 'alpha channel'; $pngalpha = true; }
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echo 'Colorspace: ' . $colspace. '<br />';
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echo 'Channels: ' . $channels. '<br />';
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if ($pngalpha) echo 'Alpha channel detected'. '<br />';
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if ($ct < 4 && strpos($data,'tRNS')!==false) { echo 'Transparency detected'. '<br />'; $errpng = 'transparency'; $pngalpha = true;}
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if ($ct == 3 && strpos($data,'iCCP')!==false) { echo 'Indexed plus ICC'. '<br />'; $errpng = 'indexed plus ICC'; }
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if(ord(substr($data,26,1))!=0) { echo 'compression method not set to zero<br />'; $errpng = 'compression method'; } // only 0 should be specified
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if(ord(substr($data,27,1))!=0) { echo 'filter method not set to zero<br />'; $errpng = 'filter method'; } // only 0 should be specified
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if(ord(substr($data,28,1))!=0) { echo 'interlaced file not set to zero<br />'; $errpng = 'interlaced file'; }
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$j = strpos($data,'pHYs');
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if ($j) {
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//Read resolution
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$unitSp=ord(substr($data,($j+12),1));
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if ($unitSp == 1) {
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$ppUx=_fourbytes2int(substr($data,($j+4),4)); // horizontal pixels per meter, usually set to zero
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$ppUx=round($ppUx/1000 *25.4);
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}
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echo 'Resolution ppUx: ' . $ppUx. '<br />';
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}
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//Gamma correction
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$gamma_correction = 0;
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$gAMA = 0;
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$j = strpos($data,'gAMA');
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if ($j && strpos($data,'sRGB')===false) { // sRGB colorspace - overrides gAMA
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$gAMA=_fourbytes2int(substr($data,($j+4),4)); // Gamma value times 100000
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$gAMA /= 100000;
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}
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if ($gAMA) { $gamma_correction = 1/$gAMA; }
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// Don't need to apply gamma correction if == default i.e. 2.2
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if ($gamma_correction > 2.15 && $gamma_correction < 2.25) { $gamma_correction = 0; }
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if ($gamma_correction) { echo 'Gamma correction detected'. '<br />'; }
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// NOT supported at present
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if (strpos($data,'sRGB')!==false) echo 'sRGB colorspace - NOT supported at present'. '<br />';
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if (strpos($data,'cHRM')!==false) echo 'Chromaticity and Whitepoint - NOT supported at present'. '<br />';
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}
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else { // PNG image with no need to convert alpha channels, bpc <> 8 etc.
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//Scan chunks looking for palette, transparency and image data
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$pal='';
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$trns='';
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$pngdata='';
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$icc = false;
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$p = 33;
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do {
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$n=_fourbytes2int(substr($data,$p,4)); $p += 4;
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$type=substr($data,$p,4); $p += 4;
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if ($type=='PLTE') {
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//Read palette
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$pal=substr($data,$p,$n); $p += $n;
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$p += 4;
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}
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else if($type=='tRNS') {
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//Read transparency info
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$t=substr($data,$p,$n); $p += $n;
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if ($ct==0) $trns=array(ord(substr($t,1,1)));
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else if ($ct==2) $trns=array(ord(substr($t,1,1)),ord(substr($t,3,1)),ord(substr($t,5,1)));
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else {
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$pos=strpos($t,chr(0));
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if(is_int($pos)) $trns=array($pos);
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}
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$p += 4;
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}
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else if ($type=='IDAT') {
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$pngdata.=substr($data,$p,$n); $p += $n;
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$p += 4;
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}
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else if ($type=='iCCP') {
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$nullsep = strpos(substr($data,$p,80), chr(0));
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$icc = substr($data, ($p+$nullsep+2), ($n-($nullsep+2)) );
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// Test if file is gzcompressed
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if (ord(substr($str, 0, 1)) == 0x1f && ord(substr($str, 1, 1)) == 0x8b) {
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$icc = @gzuncompress($icc); // Ignored if fails
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}
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if ($icc) {
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echo 'ICC profile present' . '<br />';
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if (substr($icc, 36, 4) != 'acsp') { echo 'ICC profile INVALID (no acsp flag)' . '<br />'; $icc = false; } // invalid ICC profile
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else {
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$input = substr($icc, 16, 4);
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$output = substr($icc, 20, 4);
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echo 'ICC profile Input: ' . $input. '<br />';
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echo 'ICC profile Output: ' . $output. '<br />';
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// Ignore Color profiles for conversion to other colorspaces e.g. CMYK/Lab
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if ($input != 'RGB ' || $output != 'XYZ ') { $icc = false; echo 'ICC profile ignored by mPDF' . '<br />'; }
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}
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}
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$p += $n;
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$p += 4;
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}
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else if($type=='IEND') { break; }
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else if (preg_match('/[a-zA-Z]{4}/',$type)) { $p += $n+4; }
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else { echo 'Error parsing PNG image data<br />'; }
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}
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while($n);
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if (!$pngdata) { echo 'Error parsing PNG image data - no IDAT data found<br />';}
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if ($colspace=='Indexed' && empty($pal)) { echo 'Error parsing PNG image data - missing colour palette<br />'; }
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echo 'PNG Image parsed directly' . '<br />';
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}
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}
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// GIF
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else if ($type == 'gif') {
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}
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// BMP (Windows Bitmap)
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else if ($type == 'bmp') {
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}
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// WMF
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else if ($type == 'wmf') {
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}
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// UNKNOWN TYPE - try GD imagecreatefromstring
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else {
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if (function_exists('gd_info')) { $gd = gd_info(); }
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else {$gd = array(); }
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if (isset($gd['PNG Support']) && $gd['PNG Support']) {
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$im = @imagecreatefromstring($data);
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if ($im) { echo 'Image type not recognised, but image created from file using GD imagecreate' . '<br />'; }
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else { echo 'Error parsing image file - image type not recognised, and not supported by GD imagecreate' . '<br />'; }
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}
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}
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exit;
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//==============================================================
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function _fourbytes2int($s) {
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//Read a 4-byte integer from string
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return (ord($s[0])<<24) + (ord($s[1])<<16) + (ord($s[2])<<8) + ord($s[3]);
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}
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function _twobytes2int($s) { // equivalent to _get_ushort
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//Read a 2-byte integer from string
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return (ord(substr($s, 0, 1))<<8) + ord(substr($s, 1, 1));
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}
|
|
|
|
function _jpgHeaderFromString(&$data) {
|
|
$p = 4;
|
|
$p += _twobytes2int(substr($data, $p, 2)); // Length of initial marker block
|
|
$marker = substr($data, $p, 2);
|
|
while($marker != chr(255).chr(192) && $marker != chr(255).chr(194) && $p<strlen($data)) {
|
|
// Start of frame marker (FFC0) or (FFC2) mPDF 4.4.004
|
|
$p += (_twobytes2int(substr($data, $p+2, 2))) + 2; // Length of marker block
|
|
$marker = substr($data, $p, 2);
|
|
}
|
|
if ($marker != chr(255).chr(192) && $marker != chr(255).chr(194)) { return false; }
|
|
return substr($data, $p+2, 10);
|
|
}
|
|
|
|
function _jpgDataFromHeader($hdr) {
|
|
$bpc = ord(substr($hdr, 2, 1));
|
|
if (!$bpc) { $bpc = 8; }
|
|
$h = _twobytes2int(substr($hdr, 3, 2));
|
|
$w = _twobytes2int(substr($hdr, 5, 2));
|
|
$channels = ord(substr($hdr, 7, 1));
|
|
if ($channels==3) { $colspace='DeviceRGB'; }
|
|
elseif($channels==4) { $colspace='DeviceCMYK'; }
|
|
else { $colspace='DeviceGray'; }
|
|
return array($w, $h, $colspace, $bpc, $channels);
|
|
}
|
|
|
|
function file_get_contents_by_curl($url, &$data) {
|
|
$timeout = 5;
|
|
$ch = curl_init($url);
|
|
curl_setopt($ch, CURLOPT_HEADER, 0);
|
|
curl_setopt($ch, CURLOPT_NOBODY, 0);
|
|
curl_setopt ( $ch , CURLOPT_RETURNTRANSFER , 1 );
|
|
curl_setopt ( $ch , CURLOPT_CONNECTTIMEOUT , $timeout );
|
|
$data = curl_exec($ch);
|
|
curl_close($ch);
|
|
}
|
|
|
|
|
|
function file_get_contents_by_socket($url, &$data) {
|
|
// mPDF 5.7.3
|
|
$timeout = 1;
|
|
$p = parse_url($url);
|
|
$file = $p['path'];
|
|
if ($p['scheme']=='https') {
|
|
$prefix = 'ssl://';
|
|
$port = ($p['port'] ? $p['port'] : 443);
|
|
}
|
|
else {
|
|
$prefix = '';
|
|
$port = ($p['port'] ? $p['port'] : 80);
|
|
}
|
|
if ($p['query']) { $file .= '?'.$p['query']; }
|
|
if(!($fh = @fsockopen($prefix.$p['host'], $port, $errno, $errstr, $timeout))) { return false; }
|
|
|
|
$getstring =
|
|
"GET ".$file." HTTP/1.0 \r\n" .
|
|
"Host: ".$p['host']." \r\n" .
|
|
"Connection: close\r\n\r\n";
|
|
fwrite($fh, $getstring);
|
|
// Get rid of HTTP header
|
|
$s = fgets($fh, 1024);
|
|
if (!$s) { return false; }
|
|
$httpheader .= $s;
|
|
while (!feof($fh)) {
|
|
$s = fgets($fh, 1024);
|
|
if ( $s == "\r\n" ) { break; }
|
|
}
|
|
$data = '';
|
|
while (!feof($fh)) {
|
|
$data .= fgets($fh, 1024);
|
|
}
|
|
fclose($fh);
|
|
}
|
|
|
|
//==============================================================
|
|
|
|
function _imageTypeFromString(&$data) {
|
|
$type = '';
|
|
if (substr($data, 6, 4)== 'JFIF' || substr($data, 6, 4)== 'Exif' || substr($data, 0, 2)== chr(255).chr(216)) { // 0xFF 0xD8
|
|
$type = 'jpeg';
|
|
}
|
|
else if (substr($data, 0, 6)== "GIF87a" || substr($data, 0, 6)== "GIF89a") {
|
|
$type = 'gif';
|
|
}
|
|
else if (substr($data, 0, 8)== chr(137).'PNG'.chr(13).chr(10).chr(26).chr(10)) {
|
|
$type = 'png';
|
|
}
|
|
/*-- IMAGES-WMF --*/
|
|
else if (substr($data, 0, 4)== chr(215).chr(205).chr(198).chr(154)) {
|
|
$type = 'wmf';
|
|
}
|
|
/*-- END IMAGES-WMF --*/
|
|
else if (preg_match('/<svg.*<\/svg>/is',$data)) {
|
|
$type = 'svg';
|
|
}
|
|
// BMP images
|
|
else if (substr($data, 0, 2)== "BM") {
|
|
$type = 'bmp';
|
|
}
|
|
return $type;
|
|
}
|
|
|
|
|
|
|
|
|
|
?>
|