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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.svg;
import java.awt.Rectangle;
import java.awt.GraphicsDevice;
import java.awt.Transparency;
import java.awt.image.ColorModel;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
/**
* Our implementation of the class that returns information about
* roughly what we can handle and want to see (alpha for example).
*/
class PDFGraphicsConfiguration extends GraphicsConfiguration {
// 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
* transparencty 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 from the PDFDocument (this still works for now,
* but it should be fixed...).
*
* @return the bounds of the PDF document page
*/
public Rectangle getBounds() {
return null;
}
/**
* 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 <tt>transparency</tt>
*
* @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 PDF graphics device
*/
public GraphicsDevice getDevice() {
return new PDFGraphicsDevice(this);
}
}
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