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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.
*/
package org.apache.fop.render.shading;
import java.util.List;
import org.apache.fop.pdf.PDFDeviceColorSpace;
import org.apache.fop.pdf.PDFNumber;
/**
* A class for writing shading objects for different output formats
*/
public class ShadingPattern {
private Shading shading;
/**
* Constructor
* @param shading The shading object from which to write the output
*/
public ShadingPattern(Shading shading) {
this.shading = shading;
}
/**
* Outputs the given shading object to a String
* @param colorSpace The Colospace (PDF and Postscript)
* @param shadingType The shading type
* @param background The background
* @param bBox The bounding box
* @param antiAlias Anti-aliasing
* @return Returns the output string
*/
public String toString(PDFDeviceColorSpace colorSpace, int shadingType, List background,
List bBox, boolean antiAlias) {
StringBuffer p = new StringBuffer(128);
p.append("<<\n/ShadingType " + shadingType + " \n");
if (colorSpace != null) {
p.append("/ColorSpace /"
+ colorSpace.getName() + " \n");
}
if (background != null) {
p.append("/Background [ ");
for (int bgIndex = 0; bgIndex < background.size(); bgIndex++) {
p.append(PDFNumber.doubleOut((Double)background.get(bgIndex))
+ " ");
}
p.append("] \n");
}
if (bBox
!= null) { // I've never seen an example, so I guess this is right.
p.append("/BBox [ ");
for (int bboxIndex = 0; bboxIndex < bBox.size(); bboxIndex++) {
p.append(PDFNumber.doubleOut((Double)bBox.get(bboxIndex))
+ " ");
}
p.append("] \n");
}
if (antiAlias) {
p.append("/AntiAlias " + antiAlias + " \n");
}
// Here's where we differentiate based on what type it is.
switch (shadingType) {
//Function based shading
case 1: p = shading.handleShadingType1(p); break;
//Axial shading
case 2:
//Radial shading
case 3: p = shading.handleShadingType2or3(p); break;
//Free-form Gouraud-shaded triangle meshes
case 4:
//Coons patch meshes
case 6:
//Tensor product patch meshes
case 7: p = shading.handleShadingType4or6or7(p); break;
//Lattice Free form gouraud-shaded triangle mesh
case 5: p = shading.handleShadingType5(p); break;
default: //Shading pattern outside expecting values
break;
}
p.append(">>");
return (p.toString());
}
}
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