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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.
*/
/* $Id$ */
package org.apache.fop.util.bitmap;
import java.awt.RenderingHints;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.awt.image.RenderedImage;
/**
* Default implementation of the MonochromeBitmapConverter which uses the Java Class Library
* to convert grayscale bitmaps to monochrome bitmaps.
*/
public class DefaultMonochromeBitmapConverter implements
MonochromeBitmapConverter {
/** {@inheritDoc} */
public void setHint(String name, String value) {
//ignore, not supported
}
/** {@inheritDoc} */
public RenderedImage convertToMonochrome(BufferedImage img) {
BufferedImage buf = new BufferedImage(img.getWidth(), img.getHeight(),
BufferedImage.TYPE_BYTE_BINARY);
RenderingHints hints = new RenderingHints(null);
//This hint doesn't seem to make a difference :-(
hints.put(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
ColorConvertOp op = new ColorConvertOp(
ColorSpace.getInstance(ColorSpace.CS_GRAY), hints);
op.filter(img, buf);
return buf;
}
}
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