/*
* 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 org.apache.harmony.x.imageio.plugins;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.ImageObserver;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Iterator;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.metadata.IIOMetadata;
import javax.imageio.spi.ImageReaderSpi;
import javax.imageio.stream.ImageInputStream;
import org.apache.harmony.awt.gl.image.DecodingImageSource;
import org.apache.harmony.awt.gl.image.OffscreenImage;
import org.apache.harmony.x.imageio.internal.nls.Messages;
/**
* This implementation is based on the image loader from the AWT module. It
* supports all the image types supported by the loader.
*/
public class AwtImageReader extends ImageReader {
private ImageInputStream iis;
private OffscreenImage image;
public AwtImageReader(final ImageReaderSpi imageReaderSpi) {
super(imageReaderSpi);
}
@Override
public int getHeight(final int i) throws IOException {
return getImage(i).getHeight(new ImageObserver() {
public boolean imageUpdate(final Image img, final int infoflags,
final int x, final int y, final int width,
final int height) {
return (infoflags & HEIGHT) == 0;
}
});
}
@Override
public int getWidth(final int i) throws IOException {
return getImage(i).getWidth(new ImageObserver() {
public boolean imageUpdate(final Image img, final int infoflags,
final int x, final int y, final int width,
final int height) {
return (infoflags & WIDTH) == 0;
}
});
}
@Override
public int getNumImages(final boolean b) throws IOException {
return 1;
}
@Override
public Iterator<ImageTypeSpecifier> getImageTypes(final int i)
throws IOException {
final ColorModel model = getImage(i).getColorModel();
final ImageTypeSpecifier[] spec = { new ImageTypeSpecifier(model,
model.createCompatibleSampleModel(1, 1)) };
return Arrays.asList(spec).iterator();
}
@Override
public IIOMetadata getStreamMetadata() throws IOException {
return null;
}
@Override
public IIOMetadata getImageMetadata(final int i) throws IOException {
return null;
}
@Override
public BufferedImage read(final int i, final ImageReadParam imageReadParam)
throws IOException {
return getImage(i).getBufferedImage();
}
@Override
public void setInput(final Object input, final boolean seekForwardOnly,
final boolean ignoreMetadata) {
super.setInput(input, seekForwardOnly, ignoreMetadata);
iis = (ImageInputStream) input;
image = null;
}
@Override
public ImageReadParam getDefaultReadParam() {
return new ImageReadParam();
}
private OffscreenImage getImage(final int index) throws IOException {
if (index >= getNumImages(false)) {
throw new IndexOutOfBoundsException("index >= getNumImages()"); //$NON-NLS-1$
}
if (image == null) {
if (iis == null) {
throw new IllegalArgumentException(Messages.getString(
"imageio.2", //$NON-NLS-1$
"input")); //$NON-NLS-1$
}
final DecodingImageSource source = new IISDecodingImageSource(iis);
image = new OffscreenImage(source);
source.addConsumer(image);
source.load();
}
return image;
}
private static class IISDecodingImageSource extends DecodingImageSource {
private final InputStream is;
IISDecodingImageSource(final ImageInputStream iis) {
is = PluginUtils.wrapIIS(iis);
}
@Override
protected boolean checkConnection() {
return true;
}
@Override
protected InputStream getInputStream() {
return is;
}
}
}