/*
 * 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.
 */

/* $Id: ImageEncoder.java 750418 2009-03-05 11:03:54Z vhennebert $ */

package org.apache.xmlgraphics.image.codec.util;

import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.RenderedImage;
import java.io.IOException;
import java.io.OutputStream;

/**
 * An interface describing objects that transform a BufferedImage or
 * Raster into an OutputStream.
 *
 * <p><b> This interface is not a committed part of the JAI API.  It may
 * be removed or changed in future releases of JAI.</b>
 */
public interface ImageEncoder {

    /**
     * Returns the current parameters as an instance of the
     * ImageEncodeParam interface.  Concrete implementations of this
     * interface will return corresponding concrete implementations of
     * the ImageEncodeParam interface.  For example, a JPEGImageEncoder
     * will return an instance of JPEGEncodeParam.
     */
    ImageEncodeParam getParam();

    /**
     * Sets the current parameters to an instance of the
     * ImageEncodeParam interface.  Concrete implementations
     * of ImageEncoder may throw a RuntimeException if the
     * params argument is not an instance of the appropriate
     * subclass or subinterface.  For example, a JPEGImageEncoder
     * will expect param to be an instance of JPEGEncodeParam.
     */
    void setParam(ImageEncodeParam param);

    /** Returns the OutputStream associated with this ImageEncoder. */
    OutputStream getOutputStream();

    /**
     * Encodes a Raster with a given ColorModel and writes the output
     * to the OutputStream associated with this ImageEncoder.
     */
    void encode(Raster ras, ColorModel cm) throws IOException;

    /**
     * Encodes a RenderedImage and writes the output to the
     * OutputStream associated with this ImageEncoder.
     */
    void encode(RenderedImage im) throws IOException;
}
