diff options
Diffstat (limited to 'includes/DjVuImage.php')
| -rw-r--r-- | includes/DjVuImage.php | 55 |
1 files changed, 26 insertions, 29 deletions
diff --git a/includes/DjVuImage.php b/includes/DjVuImage.php index b48aaffd..8e7caf63 100644 --- a/includes/DjVuImage.php +++ b/includes/DjVuImage.php @@ -29,13 +29,13 @@ * File format docs are available in source package for DjVuLibre: * http://djvulibre.djvuzone.org/ * - * @addtogroup Media + * @ingroup Media */ class DjVuImage { function __construct( $filename ) { $this->mFilename = $filename; } - + /** * Check if the given file is indeed a valid DjVu image file * @return bool @@ -44,27 +44,27 @@ class DjVuImage { $info = $this->getInfo(); return $info !== false; } - - + + /** * Return data in the style of getimagesize() * @return array or false on failure */ public function getImageSize() { $data = $this->getInfo(); - + if( $data !== false ) { $width = $data['width']; $height = $data['height']; - + return array( $width, $height, 'DjVu', "width=\"$width\" height=\"$height\"" ); } return false; } - + // --------- - + /** * For debugging; dump the IFF chunk structure */ @@ -77,7 +77,7 @@ class DjVuImage { $this->dumpForm( $file, $chunkLength, 1 ); fclose( $file ); } - + private function dumpForm( $file, $length, $indent ) { $start = ftell( $file ); $secondary = fread( $file, 4 ); @@ -90,7 +90,7 @@ class DjVuImage { // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables. extract( unpack( 'a4chunk/NchunkLength', $chunkHeader ) ); echo str_repeat( ' ', $indent * 4 ) . "$chunk $chunkLength\n"; - + if( $chunk == 'FORM' ) { $this->dumpForm( $file, $chunkLength, $indent + 1 ); } else { @@ -102,7 +102,7 @@ class DjVuImage { } } } - + function getInfo() { wfSuppressWarnings(); $file = fopen( $this->mFilename, 'rb' ); @@ -111,16 +111,16 @@ class DjVuImage { wfDebug( __METHOD__ . ": missing or failed file read\n" ); return false; } - + $header = fread( $file, 16 ); $info = false; - + if( strlen( $header ) < 16 ) { wfDebug( __METHOD__ . ": too short file header\n" ); } else { // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables. extract( unpack( 'a4magic/a4form/NformLength/a4subtype', $header ) ); - + if( $magic != 'AT&T' ) { wfDebug( __METHOD__ . ": not a DjVu file\n" ); } elseif( $subtype == 'DJVU' ) { @@ -136,7 +136,7 @@ class DjVuImage { fclose( $file ); return $info; } - + private function readChunk( $file ) { $header = fread( $file, 8 ); if( strlen( $header ) < 8 ) { @@ -147,16 +147,16 @@ class DjVuImage { return array( $chunk, $length ); } } - + private function skipChunk( $file, $chunkLength ) { fseek( $file, $chunkLength, SEEK_CUR ); - + if( $chunkLength & 0x01 == 1 && !feof( $file ) ) { // padding byte fseek( $file, 1, SEEK_CUR ); } } - + private function getMultiPageInfo( $file, $formLength ) { // For now, we'll just look for the first page in the file // and report its information, hoping others are the same size. @@ -166,7 +166,7 @@ class DjVuImage { if( !$chunk ) { break; } - + if( $chunk == 'FORM' ) { $subtype = fread( $file, 4 ); if( $subtype == 'DJVU' ) { @@ -179,18 +179,18 @@ class DjVuImage { $this->skipChunk( $file, $length ); } } while( $length != 0 && !feof( $file ) && ftell( $file ) - $start < $formLength ); - + wfDebug( __METHOD__ . ": multi-page DJVU file contained no pages\n" ); return false; } - + private function getPageInfo( $file, $formLength ) { list( $chunk, $length ) = $this->readChunk( $file ); if( $chunk != 'INFO' ) { wfDebug( __METHOD__ . ": expected INFO chunk, got '$chunk'\n" ); return false; } - + if( $length < 9 ) { wfDebug( __METHOD__ . ": INFO should be 9 or 10 bytes, found $length\n" ); return false; @@ -200,7 +200,7 @@ class DjVuImage { wfDebug( __METHOD__ . ": INFO chunk cut off\n" ); return false; } - + // FIXME: Would be good to replace this extract() call with something that explicitly initializes local variables. extract( unpack( 'nwidth/' . @@ -210,7 +210,7 @@ class DjVuImage { 'vresolution/' . 'Cgamma', $data ) ); # Newer files have rotation info in byte 10, but we don't use it yet. - + return array( 'width' => $width, 'height' => $height, @@ -320,14 +320,14 @@ EOT; } if ( preg_match( '/^ *INFO *\[\d*\] *DjVu *(\d+)x(\d+), *\w*, *(\d+) *dpi, *gamma=([0-9.-]+)/', $line, $m ) ) { - $xml .= Xml::tags( 'OBJECT', + $xml .= Xml::tags( 'OBJECT', array( #'data' => '', #'type' => 'image/x.djvu', 'height' => $m[2], 'width' => $m[1], #'usemap' => '', - ), + ), "\n" . Xml::element( 'PARAM', array( 'name' => 'DPI', 'value' => $m[3] ) ) . "\n" . Xml::element( 'PARAM', array( 'name' => 'GAMMA', 'value' => $m[4] ) ) . "\n" @@ -340,6 +340,3 @@ EOT; return false; } } - - -?> |