Package flex2.compiler.media

Source Code of flex2.compiler.media.JPEGTranscoder

/*
*
*  Licensed to the Apache Software Foundation (ASF) under one or more
*  contributor license agreements.  See the NOTICE file distributed with
*  this work for additional information regarding copyright ownership.
*  The ASF licenses this file to You under the Apache License, Version 2.0
*  (the "License"); you may not use this file except in compliance with
*  the License.  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
*
*/

package flex2.compiler.media;

import flash.swf.Tag;
import flash.swf.tags.DefineBits;
import flash.swf.tags.DefineSprite;
import flash.swf.builder.tags.DefineBitsBuilder;
import flash.graphics.images.JPEGImage;

import java.util.Map;

import flex2.compiler.io.VirtualFile;
import flex2.compiler.util.MimeMappings;
import flex2.compiler.TranscoderException;

/**
* Transcodes jpeg images into DefineBits tags for embedding.
*
* @author Roger Gonzalez
*/
public class JPEGTranscoder extends ImageTranscoder
{
    public JPEGTranscoder()
    {
        super(new String[]{MimeMappings.JPG, MimeMappings.JPEG}, DefineSprite.class, true);
    }

    public ImageInfo getImage( VirtualFile source, Map args ) throws TranscoderException
    {
        ImageTranscoder.ImageInfo info = new ImageInfo();
    JPEGImage image = null;

    try
    {
      image = new JPEGImage(source.getName(),
                                  source.getLastModified(),
                                  source.size(),
                                  source.getInputStream());
            info.width = image.getWidth();
            info.height = image.getHeight();
            DefineBits defineBits = new DefineBits(Tag.stagDefineBitsJPEG2);
            defineBits.data = image.getData();
            info.defineBits = defineBits;
        }
    catch (Exception ex)
    {
            throw new AbstractTranscoder.ExceptionWhileTranscoding( ex );
    }
    finally
    {
        try
        {
            if (image != null)
                image.dispose();
        }
        catch (Throwable t)
        {
        }
    }

        return info;
    }
}
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