org.apache.pdfbox.pdmodel.graphics.shading.Type4ShadingPaint Maven / Gradle / Ivy
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The Apache PDFBox library is an open source Java tool for working with PDF documents.
/*
* 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.
*/
package org.apache.pdfbox.pdmodel.graphics.shading;
import java.awt.Paint;
import java.awt.PaintContext;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.ColorModel;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.pdfbox.util.Matrix;
/**
* AWT PaintContext for Gouraud Triangle Mesh (Type 4) shading.
*/
public class Type4ShadingPaint implements Paint
{
private static final Log LOG = LogFactory.getLog(Type4ShadingPaint.class);
private PDShadingType4 shading;
private Matrix ctm;
private int pageHeight;
/**
* Constructor.
*
* @param shading the shading resources
* @param ctm current transformation matrix
* @param pageHeight the height of the page
*/
public Type4ShadingPaint(PDShadingType4 shading, Matrix ctm, int pageHeight)
{
this.shading = shading;
this.ctm = ctm;
this.pageHeight = pageHeight;
}
public int getTransparency()
{
return 0;
}
public PaintContext createContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds,
AffineTransform xform, RenderingHints hints)
{
try
{
return new Type4ShadingContext(shading, cm, xform, ctm, pageHeight, deviceBounds);
}
catch (IOException ex)
{
LOG.error(ex);
return null;
}
}
}