/* * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.imageio.plugins.png;import java.awt.image.ColorModel;import java.awt.image.IndexColorModel;import java.awt.image.SampleModel;import java.util.Locale;import javax.imageio.ImageWriter;import javax.imageio.ImageTypeSpecifier;import javax.imageio.metadata.IIOMetadataFormat;import javax.imageio.metadata.IIOMetadataFormatImpl;import javax.imageio.spi.ImageWriterSpi;import javax.imageio.stream.ImageOutputStream;public class PNGImageWriterSpi extends ImageWriterSpi { private static final String vendorName = "Oracle Corporation"; private static final String version = "1.0"; private static final String[] names = { "png", "PNG" }; private static final String[] suffixes = { "png" }; private static final String[] MIMETypes = { "image/png", "image/x-png" }; private static final String writerClassName = "com.sun.imageio.plugins.png.PNGImageWriter"; private static final String[] readerSpiNames = { "com.sun.imageio.plugins.png.PNGImageReaderSpi" }; public PNGImageWriterSpi() { super(vendorName, version, names, suffixes, MIMETypes, writerClassName, new Class[] { ImageOutputStream.class }, readerSpiNames, false, null, null, null, null, true, PNGMetadata.nativeMetadataFormatName, "com.sun.imageio.plugins.png.PNGMetadataFormat", null, null ); } public boolean canEncodeImage(ImageTypeSpecifier type) { SampleModel sampleModel = type.getSampleModel(); ColorModel colorModel = type.getColorModel(); // Find the maximum bit depth across all channels int[] sampleSize = sampleModel.getSampleSize(); int bitDepth = sampleSize[0]; for (int i = 1; i < sampleSize.length; i++) { if (sampleSize[i] > bitDepth) { bitDepth = sampleSize[i]; } } // Ensure bitDepth is between 1 and 16 if (bitDepth < 1 || bitDepth > 16) { return false; } // Check number of bands, alpha int numBands = sampleModel.getNumBands(); if (numBands < 1 || numBands > 4) { return false; } boolean hasAlpha = colorModel.hasAlpha(); // Fix 4464413: PNGTransparency reg-test was failing // because for IndexColorModels that have alpha, // numBands == 1 && hasAlpha == true, thus causing // the check below to fail and return false. if (colorModel instanceof IndexColorModel) { return true; } if ((numBands == 1 || numBands == 3) && hasAlpha) { return false; } if ((numBands == 2 || numBands == 4) && !hasAlpha) { return false; } return true; } public String getDescription(Locale locale) { return "Standard PNG image writer"; } public ImageWriter createWriterInstance(Object extension) { return new PNGImageWriter(this); }}
/*
* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.imageio.plugins.png;
import java.awt.image.ColorModel;
import java.awt.image.IndexColorModel;
import java.awt.image.SampleModel;
import java.util.Locale;
import javax.imageio.ImageWriter;
import javax.imageio.ImageTypeSpecifier;
import javax.imageio.metadata.IIOMetadataFormat;
import javax.imageio.metadata.IIOMetadataFormatImpl;
import javax.imageio.spi.ImageWriterSpi;
import javax.imageio.stream.ImageOutputStream;
public class PNGImageWriterSpi extends ImageWriterSpi {
private static final String vendorName = "Oracle Corporation";
private static final String version = "1.0";
private static final String[] names = { "png", "PNG" };
private static final String[] suffixes = { "png" };
private static final String[] MIMETypes = { "image/png", "image/x-png" };
private static final String writerClassName =
"com.sun.imageio.plugins.png.PNGImageWriter";
private static final String[] readerSpiNames = {
"com.sun.imageio.plugins.png.PNGImageReaderSpi"
};
public PNGImageWriterSpi() {
super(vendorName,
version,
names,
suffixes,
MIMETypes,
writerClassName,
new Class[] { ImageOutputStream.class },
readerSpiNames,
false,
null, null,
null, null,
true,
PNGMetadata.nativeMetadataFormatName,
"com.sun.imageio.plugins.png.PNGMetadataFormat",
null, null
);
}
public boolean canEncodeImage(ImageTypeSpecifier type) {
SampleModel sampleModel = type.getSampleModel();
ColorModel colorModel = type.getColorModel();
// Find the maximum bit depth across all channels
int[] sampleSize = sampleModel.getSampleSize();
int bitDepth = sampleSize[0];
for (int i = 1; i < sampleSize.length; i++) {
if (sampleSize[i] > bitDepth) {
bitDepth = sampleSize[i];
}
}
// Ensure bitDepth is between 1 and 16
if (bitDepth < 1 || bitDepth > 16) {
return false;
}
// Check number of bands, alpha
int numBands = sampleModel.getNumBands();
if (numBands < 1 || numBands > 4) {
return false;
}
boolean hasAlpha = colorModel.hasAlpha();
// Fix 4464413: PNGTransparency reg-test was failing
// because for IndexColorModels that have alpha,
// numBands == 1 && hasAlpha == true, thus causing
// the check below to fail and return false.
if (colorModel instanceof IndexColorModel) {
return true;
}
if ((numBands == 1 || numBands == 3) && hasAlpha) {
return false;
}
if ((numBands == 2 || numBands == 4) && !hasAlpha) {
return false;
}
return true;
}
public String getDescription(Locale locale) {
return "Standard PNG image writer";
}
public ImageWriter createWriterInstance(Object extension) {
return new PNGImageWriter(this);
}
}