includes/media/SVG.php

   1 <?php
   2
   3 /**
   4  * @addtogroup Media
   5  */
   6 class SvgHandler extends ImageHandler {
   7         function isEnabled() {
   8                 global $wgSVGConverters, $wgSVGConverter;
   9                 if ( !isset( $wgSVGConverters[$wgSVGConverter] ) ) {
  10                         wfDebug( "\$wgSVGConverter is invalid, disabling SVG rendering.\n" );
  11                         return false;
  12                 } else {
  13                         return true;
  14                 }
  15         }
  16
  17         function mustRender( $file ) {
  18                 return true;
  19         }
  20
  21         function normaliseParams( $image, &$params ) {
  22                 global $wgSVGMaxSize;
  23                 if ( !parent::normaliseParams( $image, $params ) ) {
  24                         return false;
  25                 }
  26
  27                 # Don't make an image bigger than wgMaxSVGSize
  28                 $params['physicalWidth'] = $params['width'];
  29                 $params['physicalHeight'] = $params['height'];
  30                 if ( $params['physicalWidth'] > $wgSVGMaxSize ) {
  31                         $srcWidth = $image->getWidth( $params['page'] );
  32                         $srcHeight = $image->getHeight( $params['page'] );
  33                         $params['physicalWidth'] = $wgSVGMaxSize;
  34                         $params['physicalHeight'] = File::scaleHeight( $srcWidth, $srcHeight, $wgSVGMaxSize );
  35                 }
  36                 return true;
  37         }
  38
  39         function doTransform( $image, $dstPath, $dstUrl, $params, $flags = 0 ) {
  40                 global $wgSVGConverters, $wgSVGConverter, $wgSVGConverterPath;
  41
  42                 if ( !$this->normaliseParams( $image, $params ) ) {
  43                         return new TransformParameterError( $params );
  44                 }
  45                 $clientWidth = $params['width'];
  46                 $clientHeight = $params['height'];
  47                 $physicalWidth = $params['physicalWidth'];
  48                 $physicalHeight = $params['physicalHeight'];
  49                 $srcPath = $image->getPath();
  50
  51                 if ( $flags & self::TRANSFORM_LATER ) {
  52                         return new ThumbnailImage( $image, $dstUrl, $clientWidth, $clientHeight, $dstPath );
  53                 }
  54
  55                 if ( !wfMkdirParents( dirname( $dstPath ) ) ) {
  56                         return new MediaTransformError( 'thumbnail_error', $clientWidth, $clientHeight,
  57                                 wfMsg( 'thumbnail_dest_directory' ) );
  58                 }
  59
  60                 $err = false;
  61                 if( isset( $wgSVGConverters[$wgSVGConverter] ) ) {
  62                         $cmd = str_replace(
  63                                 array( '$path/', '$width', '$height', '$input', '$output' ),
  64                                 array( $wgSVGConverterPath ? wfEscapeShellArg( "$wgSVGConverterPath/" ) : "",
  65                                            intval( $physicalWidth ),
  66                                            intval( $physicalHeight ),
  67                                            wfEscapeShellArg( $srcPath ),
  68                                            wfEscapeShellArg( $dstPath ) ),
  69                                 $wgSVGConverters[$wgSVGConverter] ) . " 2>&1";
  70                         wfProfileIn( 'rsvg' );
  71                         wfDebug( __METHOD__.": $cmd\n" );
  72                         $err = wfShellExec( $cmd, $retval );
  73                         wfProfileOut( 'rsvg' );
  74                 }
  75
  76                 $removed = $this->removeBadFile( $dstPath, $retval );
  77                 if ( $retval != 0 || $removed ) {
  78                         wfDebugLog( 'thumbnail',
  79                                 sprintf( 'thumbnail failed on %s: error %d "%s" from "%s"',
  80                                         wfHostname(), $retval, trim($err), $cmd ) );
  81                         return new MediaTransformError( 'thumbnail_error', $clientWidth, $clientHeight, $err );
  82                 } else {
  83                         return new ThumbnailImage( $image, $dstUrl, $clientWidth, $clientHeight, $dstPath );
  84                 }
  85         }
  86
  87         function getImageSize( $image, $path ) {
  88                 return wfGetSVGsize( $path );
  89         }
  90
  91         function getThumbType( $ext, $mime ) {
  92                 return array( 'png', 'image/png' );
  93         }
  94
  95         function getLongDesc( $file ) {
  96                 global $wgLang;
  97                 return wfMsg( 'svg-long-desc', $file->getWidth(), $file->getHeight(),
  98                         $wgLang->formatSize( $file->getSize() ) );
  99         }
 100 }