/*
* 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 Viskov Nikolay
*/
package org.apache.harmony.x.imageio.plugins.png;
import java.io.IOException;
import java.util.Locale;
import org.apache.harmony.x.imageio.plugins.ImageType;
import org.apache.harmony.x.imageio.plugins.PluginUtils;
import com.google.code.appengine.awt.image.ColorModel;
import com.google.code.appengine.awt.image.IndexColorModel;
import com.google.code.appengine.imageio.ImageTypeSpecifier;
import com.google.code.appengine.imageio.ImageWriter;
import com.google.code.appengine.imageio.spi.ImageWriterSpi;
public class PNGImageWriterSpi extends ImageWriterSpi {
public PNGImageWriterSpi() {
super(PluginUtils.VENDOR_NAME, PluginUtils.DEFAULT_VERSION,
ImageType.PNG.getNames(), ImageType.PNG.getSuffixes(),
ImageType.PNG.getMimeTypes(),
PNGImageWriter.class.getName(), STANDARD_OUTPUT_TYPE,
new String[] { PNGImageReaderSpi.class.getName() },
false,// supportsStandardStreamMetadataFormat
null,// nativeStreamMetadataFormatName
null,// nativeStreamMetadataFormatClassName
null,// extraStreamMetadataFormatNames
null,// extraStreamMetadataFormatClassNames
false,// supportsStandardImageMetadataFormat
null,// nativeImageMetadataFormatName
null,// nativeImageMetadataFormatClassName
null,// extraImageMetadataFormatNames
null// extraImageMetadataFormatClassNames
);
}
@Override
public boolean canEncodeImage(ImageTypeSpecifier type) {
boolean canEncode = true;
int numBands = type.getSampleModel().getNumBands();
ColorModel colorModel = type.getColorModel();
int bitDepth = colorModel.getPixelSize() / numBands;
if (colorModel instanceof IndexColorModel) {
if (bitDepth != 1 && bitDepth != 2 && bitDepth != 4
&& bitDepth != 8) {
canEncode = false;
}
if (numBands != 1) {
canEncode = false;
}
} else if (numBands == 1) {
if (bitDepth != 1 && bitDepth != 2 && bitDepth != 4
&& bitDepth != 8 && bitDepth != 16) {
canEncode = false;
}
} else if (numBands == 2) {
if (bitDepth != 8 && bitDepth != 16) {
canEncode = false;
}
} else if (numBands == 3) {
if (bitDepth != 8 && bitDepth != 16) {
canEncode = false;
}
} else if (numBands == 4) {
if (bitDepth != 8 && bitDepth != 16) {
canEncode = false;
}
}
return canEncode;
}
@Override
public ImageWriter createWriterInstance(Object arg0) throws IOException {
return new PNGImageWriter(this);
}
@Override
public String getDescription(Locale arg0) {
return "PNG image encoder"; //$NON-NLS-1$
}
}