BlinkenLibJava

@@ -1418,6 +1418,83 @@ public class BlinkenMovie

     return false;

   }

+  public boolean saveGif( String filename )

+  {

+    try {

+

+      //create GIF writer

+      ImageWriter gifWr = null;

+      {

+        Iterator<ImageWriter> it = ImageIO.getImageWritersBySuffix( "gif" );

+        if ( ! it.hasNext( ) ) {

+          return false;

+        }

+        gifWr = it.next();

+      }

+

+      //begin writing image

+      ImageOutputStream out = new FileImageOutputStream( new File( filename ) );

+      gifWr.setOutput( out );

+      gifWr.prepareWriteSequence( null );

+

+      //create buffered image with correct dimensions

+      BufferedImage img = new BufferedImage( this.width, this.height,

+                                             BufferedImage.TYPE_INT_ARGB );

+

+      //process all frames

+      int cnt = this.getFrameCnt( );

+      for( int i = 0; i < cnt; i++ )

+      {

+

+        //frame data into buffered image

+        for( int y = 0; y < this.height; y++ )

+          for( int x = 0; x < this.width; x++ )

+            img.setRGB( x, y, this.frames[i].getColor( y, x ).getRGB( ) );

+

+        //get frame duration

+        int duration = this.frames[i].getDuration( );

+

+        //construct metadata

+        ImageWriteParam prm = gifWr.getDefaultWriteParam( );

+        ImageTypeSpecifier typeSpec = ImageTypeSpecifier.createFromBufferedImageType( img.getType( ) );

+        IIOMetadata meta = gifWr.getDefaultImageMetadata( typeSpec, prm );

+        String metaFmt = meta.getNativeMetadataFormatName( );

+        IIOMetadataNode metaRoot = (IIOMetadataNode)meta.getAsTree( metaFmt );

+        String nameGCE = "GraphicControlExtension";

+        IIOMetadataNode metaGCE = null;

+        for( int n = 0; n < metaRoot.getLength(); n++ ) {

+          Node node = metaRoot.item(n);

+          if( node.getNodeName().compareToIgnoreCase(nameGCE) == 0 ) {

+            metaGCE = (IIOMetadataNode)node;

+          }

+        }

+        if( metaGCE == null ) {

+          metaGCE = new IIOMetadataNode( nameGCE );

+          metaRoot.appendChild( metaGCE );

+        }

+        metaGCE.setAttribute( "disposalMethod", "doNotDispose" );

+        metaGCE.setAttribute( "transparentColorFlag", "FALSE" );

+        metaGCE.setAttribute( "transparentColorIndex", "0" );

+        metaGCE.setAttribute( "delayTime", Integer.toString( (duration + 5) / 10 ) );

+        metaGCE.setAttribute( "userInputFlag", "FALSE" );

+        meta.setFromTree( metaFmt, metaRoot );

+

+        //write image

+        gifWr.writeToSequence( new IIOImage( img, null, meta ), prm );

+

+      }

+

+      //finalize image

+      gifWr.endWriteSequence( );

+      out.close( );

+

+      return true;

+    }

+    catch( IOException e ) { }

+

+    return false;

+  }

+

   public boolean save( String filename )

   {

     if( filename.endsWith( ".blm" ) )

@@ -1428,6 +1505,8 @@ public class BlinkenMovie

       return saveBml( filename );

     if( filename.endsWith( ".bbm" ) )

       return saveBbm( filename );

+    if( filename.endsWith( ".gif" ) )

+      return saveGif( filename );

     return false;

   }