示例#1
0
void QgsSvgCache::cachePicture( QgsSvgCacheEntry *entry, bool forceVectorOutput )
{
  if ( !entry )
  {
    return;
  }

  delete entry->picture;
  entry->picture = 0;

  //correct QPictures dpi correction
  QPicture* picture = new QPicture();
  QRectF rect;
  QSvgRenderer r( entry->svgContent );
  double hwRatio = 1.0;
  if ( r.viewBoxF().width() > 0 )
  {
    hwRatio = r.viewBoxF().height() / r.viewBoxF().width();
  }
  bool drawOnScreen = qgsDoubleNear( entry->rasterScaleFactor, 1.0, 0.1 );
  if ( drawOnScreen && forceVectorOutput ) //forceVectorOutput always true in case of composer draw / composer preview
  {
    // fix to ensure rotated symbols scale with composer page (i.e. not map item) zoom
    double wSize = entry->size;
    double hSize = wSize * hwRatio;
    QSizeF s( r.viewBoxF().size() );
    s.scale( wSize, hSize, Qt::KeepAspectRatio );
    rect = QRectF( -s.width() / 2.0, -s.height() / 2.0, s.width(), s.height() );
  }
  else
  {
    // output for print or image saving @ specific dpi
    double scaledSize = entry->size / 25.4 / ( entry->rasterScaleFactor * entry->widthScaleFactor );
    double wSize = scaledSize * picture->logicalDpiX();
    double hSize = scaledSize * picture->logicalDpiY() * r.viewBoxF().height() / r.viewBoxF().width();
    rect = QRectF( QPointF( -wSize / 2.0, -hSize / 2.0 ), QSizeF( wSize, hSize ) );
  }

  QPainter p( picture );
  r.render( &p, rect );
  entry->picture = picture;
  mTotalSize += entry->picture->size();
}
示例#2
0
void QgsSvgCache::cachePicture( QgsSvgCacheEntry *entry )
{
  if ( !entry )
  {
    return;
  }

  delete entry->picture;
  entry->picture = 0;

  //correct QPictures dpi correction
  QPicture* picture = new QPicture();
  double pictureSize = entry->size  /  25.4 / ( entry->rasterScaleFactor * entry->widthScaleFactor )  * picture->logicalDpiX();
  QRectF rect( QPointF( -pictureSize / 2.0, -pictureSize / 2.0 ), QSizeF( pictureSize, pictureSize ) );


  QSvgRenderer renderer( entry->svgContent );
  QPainter painter( picture );
  renderer.render( &painter, rect );
  entry->picture = picture;
  mTotalSize += entry->picture->size();
}