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* feat: woff to pdf helper * fix: corrected if statement --------- Co-authored-by: Niclas Norin <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,236 @@ | ||
| <?php | ||
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| namespace Municipio\Helper; | ||
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| class WoffConverter | ||
| { | ||
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| /** | ||
| * Unwraps a WOFF font file and repackages it as an OpenType font and writes it to disk. | ||
| * @param string $woffFile absolute path of WOFF file (includes filename) | ||
| * @param string $convertPath absolute path to cache converted file (includes filename) | ||
| */ | ||
| public static function convert($woffFile, $convertPath) | ||
| { | ||
| if (is_null($woffFile) || is_null($convertPath)) { | ||
| WoffConverter::bail("Empty argument: convert($woffFile, $convertPath"); | ||
| } | ||
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| if (! function_exists('gzuncompress')) { | ||
| bail(__CLASS__ . ' requires gzuncompress().'); | ||
| } | ||
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| $debug = false; | ||
| $numTables = 0; | ||
| $oTDirEntrySize = 16; // bytes | ||
| $oTHeaderSize = 12; | ||
| $woffDirEntrySize = 20; | ||
| $woffHeaderSize = 44; | ||
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| if (! $fh = fopen($woffFile, "rb")) { | ||
| WoffConverter::bail("Couldn't open file $woffFile."); | ||
| } | ||
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| $header = unpack('Nsig/Nflv/Nlen/nntab/nres/Nssize/nmajv/nminv/Nmoff/Nmlen/Nmolen/Nprivo/Nprivl', fread($fh, $woffHeaderSize)); | ||
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| if ($debug) { | ||
| foreach ($header as $key => $val) { | ||
| printf("%s => 0x%x\n", $key, $val) ; | ||
| } | ||
| } | ||
|
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| foreach ($header as $key => $val) { | ||
| switch($key) { | ||
| case 'sig': | ||
| $sfntVersion = $val; | ||
| if ($debug) { | ||
| if ($val != 0x774F4646) { // wOFF | ||
| if ($debug) echo 'font file not WOFF'; | ||
| WoffConverter::bail("File is not a valid WOFF font.", $fh); | ||
| } else { | ||
| if ($debug) echo 'font file cool.'; | ||
| } | ||
| } | ||
| break; | ||
| case 'flv': | ||
| $flavor = $val; | ||
| if ($val == 0x00010000) { | ||
| if ($debug) echo 'TrueType flavor.'; | ||
| } else if ($val == 0x4F54544F) { | ||
| if ($debug) echo 'CFF flavor.'; | ||
| } else { | ||
| if ($debug) echo 'unknown flavor.'; | ||
| } | ||
| // Use otf for all flavors, makes deriving the cache filename easier later on. | ||
| $fileExtension = 'otf'; | ||
| break; | ||
| case 'len': | ||
| if ($debug) echo "\nfile size $val bytes. "; | ||
| break; | ||
| case 'ntab': | ||
| if ($debug) echo "\n$val font tables."; | ||
| $numTables = $val; | ||
| break; | ||
| case 'res': | ||
| if ($val != 0) { | ||
| if ($debug) echo "\nproblem - reserved field != 0."; | ||
| WoffConverter::bail("Reserved field has to be 0 (zero).", $fh); | ||
| } | ||
| break; | ||
| case 'ssize': | ||
| if ($debug) echo "\ntotal data size $val."; | ||
| break; | ||
| case 'majv': | ||
| if ($debug) echo "\nmajor version $val."; | ||
| break; | ||
| case 'minv': | ||
| if ($debug) echo "\nminor version $val."; | ||
| break; | ||
| case 'moff': | ||
| if ($debug) echo "\nmeta offset $val bytes."; | ||
| break; | ||
| case 'mlen': | ||
| if ($debug) echo "\ncompressed data block $val bytes"; | ||
| break; | ||
| case 'molen': | ||
| if ($debug) echo "\nuncompressed data block $val bytes"; | ||
| break; | ||
| case 'privo': | ||
| if ($debug) echo "\nprivate data offset $val bytes"; | ||
| $privateOffset = $val; | ||
| break; | ||
| case 'privl': | ||
| if ($debug) echo "\nprivate data length $val bytes"; | ||
| $privateLength = $val; | ||
| break; | ||
| } | ||
| } | ||
|
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| // check out the private data | ||
| if ($debug) { | ||
| $whereAt = ftell($fh); | ||
| fseek($fh, $privateOffset); | ||
| $privateData = fread($fh, $privateLength); | ||
| echo "Private data: $privateData"; | ||
| fseek($fh, $whereAt); | ||
| } | ||
|
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| // write offset table | ||
| if ($debug) echo "\nout file $convertPath"; | ||
| $ofh = fopen($convertPath, "wb"); | ||
| if (! $ofh) { | ||
| WoffConverter::bail("Couldn't open file $outfile for writing.", $fh); | ||
| } | ||
| fwrite($ofh, pack('N', $flavor)); | ||
| fwrite($ofh, pack('n', $numTables)); | ||
|
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| $maxPower2 = 0; | ||
| while (pow(2, $maxPower2) <= $numTables) { | ||
| $maxPower2++; | ||
| } | ||
|
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| $searchRange = $maxPower2 * 16; | ||
| $entrySelector = log($searchRange, 2); | ||
|
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| fwrite($ofh, pack('n', $searchRange)); | ||
| fwrite($ofh, pack('n', $entrySelector)); | ||
| fwrite($ofh, pack('n', $numTables * $searchRange)); | ||
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| $tableDirectorySize = $oTDirEntrySize * $numTables; | ||
|
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| $tableData = array(); | ||
| $tableLength = array(); | ||
| $currentEOF = $tableDirectorySize + $oTHeaderSize; | ||
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| // Write table records | ||
| for ($i = 0; $i < $numTables; $i++ ) { | ||
|
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| $dirEntry = unpack('Ntag/N4', fread($fh, $woffDirEntrySize)); | ||
| if ($debug) { | ||
| printf("\ntag value: %d", $dirEntry['tag']); | ||
| printf("offset: 0x%x\n", $dirEntry[1]); | ||
| printf("compressed size: 0x%x\n", $dirEntry[2]); | ||
| printf("uncompressed size: 0x%x\n", $dirEntry[3]); | ||
| printf("checksum: 0x%x\n", $dirEntry[4]); | ||
| } | ||
| $whereAt = ftell($fh); | ||
|
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| if (fseek($fh, $dirEntry[1])) { | ||
| WoffConverter::bail("fseek-ing to offset {$dirEntry[1]}", $fh, $ofh); | ||
| } | ||
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| $tableData[$i] = fread($fh, $dirEntry[2]); | ||
|
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| fseek($fh, $whereAt); | ||
| if ($dirEntry[2] != $dirEntry[3]) { | ||
| $tableData[$i] = gzuncompress($tableData[$i]); | ||
| $tableLength[$i] = strlen($tableData[$i]); | ||
| } else { | ||
| $tableLength[$i] = $dirEntry[3]; | ||
| } | ||
|
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| fwrite($ofh, pack('N', $dirEntry['tag'])); //tag | ||
| fwrite($ofh, pack('N', $dirEntry[4])); // checksum | ||
| fwrite($ofh, pack('N', $currentEOF)); // offset | ||
| fwrite($ofh, pack('N', $tableLength[$i])); // length without padding | ||
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| if ($debug) { | ||
| printf("\nwriting table rec for tag: %d\n", $dirEntry['tag']); | ||
| printf("\n\t checksum: 0x%x\n", $dirEntry[4]); | ||
| printf("\n\t offset: %d", $currentEOF); | ||
| printf("\n\t length: %d", $tableLength[$i]); | ||
| } | ||
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| $pad = 0; | ||
| if (($tableLength[$i] % 4) != 0) { // pad for 4-byte boundaries | ||
| $pad = $tableLength[$i] % 4; | ||
| } | ||
| $currentEOF += strlen($tableData[$i]) + $pad; | ||
| } | ||
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| $bytesWrote = 0; | ||
| // Write table data | ||
| for ($i = 0; $i < count($tableData); $i++) { | ||
| if ($debug) { | ||
| echo "\nfile pointer at: " . ftell($ofh); | ||
| echo "\ntablelength = " . $tableLength[$i] . ' strlen of data: ' . strlen($tableData[$i]); | ||
| } | ||
| $bytesWrote += fwrite($ofh, $tableData[$i], $tableLength[$i]); | ||
| if ($debug) echo "\nwriting {$tableLength[$i]} bytes. Actual total bytes written: $bytesWrote"; | ||
|
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| if (($tableLength[$i] % 4) != 0) { // pad for 4-byte boundaries | ||
| $pad = $tableLength[$i] % 4; | ||
| $bytesWrote += fwrite(($ofh), pack("x$pad")); | ||
| if ($debug) echo "\nwriting $pad null bytes. Actual total bytes written: $bytesWrote"; | ||
| } | ||
| } | ||
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| fclose($fh); | ||
| fclose($ofh); | ||
| } | ||
|
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|
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| /** | ||
| * Throws an exception with $message and closes given file handles if applicable. | ||
| * @param string $message | ||
| * @param Resource $fh | ||
| * @param Resource $ofh | ||
| */ | ||
| private static function bail($message, $fh = NULL, $ofh = NULL) | ||
| { | ||
| if (is_resource($fh)) { | ||
| close($fh); | ||
| } | ||
| if (is_resource($ofh)) { | ||
| close($ofh); | ||
| } | ||
| throw new \WP_Error($message); | ||
| } | ||
| } |