includes/media/SVG.php

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