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/*
* This program is free software; you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
* Foundation.
*
* You should have received a copy of the GNU Lesser General Public License along with this
* program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
* or from the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* Copyright (c) 2009 Pentaho Corporation. All rights reserved.
*/
package org.pentaho.reporting.libraries.base.encoder;
import java.awt.Image;
import java.io.IOException;
import java.io.OutputStream;
/**
* A image encoder. The encoder's encodeImage method must be synchronized in some way, so that
* multiple calls from multiple threads do not interact with each other.
*
* @author Thomas Morgner
*/
public interface ImageEncoder
{
/**
* Encodes the given image using the given encoder-specific quality and alpha-channel settings and writes
* the encoded image-data to the given stream.
*
* @param image the image to be encoded.
* @param outputStream the output stream, where to write the image data to.
* @param quality the quality of the encoding.
* @param encodeAlpha a flag controlling whether the alpha-channel should be encoded as well.
* @throws IOException if there was an IO error while generating or writing the image data.
* @throws UnsupportedEncoderException if the encoder is not supported.
*/
public void encodeImage(final Image image,
final OutputStream outputStream,
final float quality,
final boolean encodeAlpha) throws IOException, UnsupportedEncoderException;
/**
* Returns the mime-type of the encoded data.
*
* @return the mime-type.
*/
public String getMimeType();
}
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