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/*
* 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.
*/
/**
* @author Sergey I. Salishev
* @version $Revision: 1.2 $
*/
package javax.imageio;
import java.awt.Dimension;
import java.awt.image.BufferedImage;
/*
* @author Sergey I. Salishev
* @version $Revision: 1.2 $
*/
/**
* The ImageReadParam class provides information to the ImageReader about how an
* image is to be decoded.
*
* @since Android 1.0
*/
public class ImageReadParam extends IIOParam {
/**
* This flag indicates if this ImageReadParam supports setting the source
* rendering size.
*/
protected boolean canSetSourceRenderSize;
/**
* The destination BufferedImage.
*/
protected BufferedImage destination;
/**
* The destination bands.
*/
protected int[] destinationBands;
/**
* The minimum progressive pass.
*/
protected int minProgressivePass;
/**
* The number of progressive passes.
*/
protected int numProgressivePasses;
/**
* The source render size.
*/
protected Dimension sourceRenderSize;
/**
* Returns true if this ImageReaderParam supports rendering a source image
* at an arbitrary size.
*
* @return true, if this ImageReaderParam supports rendering a source image
* at an arbitrary size, false otherwise.
*/
public boolean canSetSourceRenderSize() {
return canSetSourceRenderSize;
}
/**
* Gets the current destination image as BufferedImage.
*
* @return the BufferedImage which represents the destination.
*/
public BufferedImage getDestination() {
return destination;
}
/**
* Gets the indices of destination bands.
*
* @return the array of destination bands.
*/
public int[] getDestinationBands() {
return destinationBands;
}
/**
* Gets the index of the maximum pass to be decoded. This method returns
* Integer.MAX_VALUE, if getSourceNumProgressivePasses() method returns
* value that is equal to Integer.MAX_VALUE. Otherwise this method returns
* getSourceMinProgressivePass() + getSourceNumProgressivePasses() - 1.
*
* @return the index of the maximum pass to be decoded.
*/
public int getSourceMaxProgressivePass() {
if (getSourceNumProgressivePasses() == Integer.MAX_VALUE) {
return Integer.MAX_VALUE;
}
return getSourceMinProgressivePass() + getSourceNumProgressivePasses() - 1;
}
/**
* Gets the index of the minimum progressive pass that is decoded, default
* is 0.
*
* @return the index of the minimum progressive pass that is decoded,
* default is 0.
*/
public int getSourceMinProgressivePass() {
return minProgressivePass;
}
/**
* Gets the number of progressive passes. The default value is
* Integer.MAX_VALUE.
*
* @return the number of progressive passes.
*/
public int getSourceNumProgressivePasses() {
return numProgressivePasses;
}
/**
* Gets the dimension of source image which will be rendered during decoding
* process.
*
* @return the source render size.
*/
public Dimension getSourceRenderSize() {
return sourceRenderSize;
}
/**
* Sets the specified destination image. This image will be used by read,
* readAll, and readRaster methods, and a reference to it will be returned
* by those methods.
*
* @param destination
* the destination image.
*/
public void setDestination(BufferedImage destination) {
this.destination = destination;
}
/**
* Sets the indices of the destination bands.
*
* @param destinationBands
* the indices of the destination bands.
*/
public void setDestinationBands(int[] destinationBands) {
this.destinationBands = destinationBands;
}
@Override
public void setDestinationType(ImageTypeSpecifier destinationType) {
this.destinationType = destinationType;
}
/**
* Sets the source progressive passes.
*
* @param minPass
* the index of the minimum pass to be decoded.
* @param numPasses
* the number of passes to be decoded.
*/
public void setSourceProgressivePasses(int minPass, int numPasses) {
minProgressivePass = minPass;
numProgressivePasses = numPasses;
}
/**
* Sets the dimension size of source image if an image can be rendered at an
* arbitrary size.
*
* @param size
* the size of rendered image.
* @throws UnsupportedOperationException
* the unsupported operation exception.
*/
public void setSourceRenderSize(Dimension size) throws UnsupportedOperationException {
if (!canSetSourceRenderSize) {
throw new UnsupportedOperationException("can't set source renderer size");
}
sourceRenderSize = size;
}
}
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