org.apache.xmlgraphics.java2d.GraphicsConfigurationWithTransparency Maven / Gradle / Ivy
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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: GraphicsConfigurationWithTransparency.java 1862543 2019-07-04 09:25:38Z ssteiner $ */
package org.apache.xmlgraphics.java2d;
import java.awt.GraphicsDevice;
import java.awt.Rectangle;
import java.awt.Transparency;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
/**
* An implementation of {@link java.awt.GraphicsConfiguration} that supports transparencies (alpha
* channels).
*/
public class GraphicsConfigurationWithTransparency extends AbstractGraphicsConfiguration {
// We use this to get a good colormodel..
private static final BufferedImage BI_WITH_ALPHA =
new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB);
// We use this to get a good colormodel..
private static final BufferedImage BI_WITHOUT_ALPHA =
new BufferedImage(1, 1, BufferedImage.TYPE_INT_RGB);
/**
* Construct a buffered image with an alpha channel, unless transparency is OPAQUE (no alpha
* at all).
*
* @param width the width of the image
* @param height the height of the image
* @param transparency the alpha value of the image
* @return the new buffered image
*/
public BufferedImage createCompatibleImage(int width, int height, int transparency) {
if (transparency == Transparency.OPAQUE) {
return new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
} else {
return new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
}
}
/**
* Construct a buffered image with an alpha channel.
*
* @param width the width of the image
* @param height the height of the image
* @return the new buffered image
*/
public BufferedImage createCompatibleImage(int width, int height) {
return new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
}
/**
* TODO: This should return the page bounds in Pts, I couldn't figure out how to get this for
* the current page (this still works for now, but it should be fixed...).
*
* @return the bounds of the document page
*/
public Rectangle getBounds() {
return new Rectangle();
}
/**
* Return a good default color model for this 'device'.
* @return the colour model for the configuration
*/
public ColorModel getColorModel() {
return BI_WITH_ALPHA.getColorModel();
}
/**
* Return a good color model given transparency
*
* @param transparency the alpha value for the colour model
* @return the colour model for the configuration
*/
public ColorModel getColorModel(int transparency) {
if (transparency == Transparency.OPAQUE) {
return BI_WITHOUT_ALPHA.getColorModel();
} else {
return BI_WITH_ALPHA.getColorModel();
}
}
/**
* The default transform (1:1).
*
* @return the default transform for the configuration
*/
public AffineTransform getDefaultTransform() {
return new AffineTransform();
}
/**
* The normalizing transform (1:1) (since we currently
* render images at 72dpi, which we might want to change
* in the future).
*
* @return the normalizing transform for the configuration
*/
public AffineTransform getNormalizingTransform() {
return new AffineTransform(2, 0, 0, 2, 0, 0);
}
/**
* Return our dummy instance of GraphicsDevice
*
* @return the graphics device
*/
public GraphicsDevice getDevice() {
return new GenericGraphicsDevice(this);
}
}