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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.render.ps.svg;
-
- import java.awt.Color;
- import java.awt.Graphics;
- import java.awt.Paint;
- import java.awt.geom.AffineTransform;
- import java.io.IOException;
- import java.util.ArrayList;
- import java.util.List;
-
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
-
- import org.apache.batik.ext.awt.LinearGradientPaint;
- import org.apache.batik.ext.awt.MultipleGradientPaint;
- import org.apache.batik.ext.awt.RadialGradientPaint;
-
- import org.apache.xmlgraphics.java2d.ps.PSGraphics2D;
- import org.apache.xmlgraphics.ps.PSGenerator;
-
- import org.apache.fop.pdf.PDFDeviceColorSpace;
- import org.apache.fop.render.shading.Function;
- import org.apache.fop.render.shading.GradientFactory;
- import org.apache.fop.render.shading.GradientRegistrar;
- import org.apache.fop.render.shading.PSGradientFactory;
- import org.apache.fop.render.shading.Pattern;
- import org.apache.fop.render.shading.Shading;
-
-
- public class PSSVGGraphics2D extends PSGraphics2D implements GradientRegistrar {
-
- private static final Log LOG = LogFactory.getLog(PSSVGGraphics2D.class);
-
- /**
- * Create a new Graphics2D that generates PostScript code.
- * @param textAsShapes True if text should be rendered as graphics
- * @see org.apache.xmlgraphics.java2d.AbstractGraphics2D#AbstractGraphics2D(boolean)
- */
- public PSSVGGraphics2D(boolean textAsShapes) {
- super(textAsShapes);
- }
-
- /**
- * Create a new Graphics2D that generates PostScript code.
- * @param textAsShapes True if text should be rendered as graphics
- * @param gen PostScript generator to use for output
- * @see org.apache.xmlgraphics.java2d.AbstractGraphics2D#AbstractGraphics2D(boolean)
- */
- public PSSVGGraphics2D(boolean textAsShapes, PSGenerator gen) {
- super(textAsShapes, gen);
- }
-
- /**
- * Constructor for creating copies
- * @param g parent PostScript Graphics2D
- */
- public PSSVGGraphics2D(PSGraphics2D g) {
- super(g);
- }
-
- protected void applyPaint(Paint paint, boolean fill) {
- super.applyPaint(paint, fill);
- if (paint instanceof RadialGradientPaint) {
- RadialGradientPaint rgp = (RadialGradientPaint)paint;
- try {
- handleRadialGradient(rgp, gen);
- } catch (IOException ioe) {
- handleIOException(ioe);
- }
- } else if (paint instanceof LinearGradientPaint) {
- LinearGradientPaint lgp = (LinearGradientPaint)paint;
- try {
- handleLinearGradient(lgp, gen);
- } catch (IOException ioe) {
- handleIOException(ioe);
- }
- }
- }
-
- private void handleLinearGradient(LinearGradientPaint lgp, PSGenerator gen) throws IOException {
- MultipleGradientPaint.CycleMethodEnum cycle = lgp.getCycleMethod();
- if (cycle != MultipleGradientPaint.NO_CYCLE) {
- return;
- }
- float[] fractions = lgp.getFractions();
- Color[] cols = lgp.getColors();
-
- AffineTransform transform = new AffineTransform(getBaseTransform());
- transform.concatenate(getTransform());
- transform.concatenate(lgp.getTransform());
-
- List theMatrix = new ArrayList();
- double [] mat = new double[6];
- transform.getMatrix(mat);
- for (int idx = 0; idx < mat.length; idx++) {
- theMatrix.add(Double.valueOf(mat[idx]));
- }
-
-
- List<Double> theCoords = new java.util.ArrayList<Double>();
-
-
- AffineTransform start = applyTransform(lgp.getTransform(),
- lgp.getStartPoint().getX(), lgp.getStartPoint().getY());
- AffineTransform end = applyTransform(lgp.getTransform(), lgp.getEndPoint().getX(), lgp.getEndPoint().getY());
- double startX = start.getTranslateX();
- double startY = start.getTranslateY();
- double endX = end.getTranslateX();
- double endY = end.getTranslateY();
-
- double width = endX - startX;
- double height = endY - startY;
-
- startX = startX + width * fractions[0];
- endX = endX - width * (1 - fractions[fractions.length - 1]);
- startY = startY + (height * fractions[0]);
- endY = endY - height * (1 - fractions[fractions.length - 1]);
-
- theCoords.add(startX);
- theCoords.add(startY);
- theCoords.add(endX);
- theCoords.add(endY);
-
-
- List<Color> someColors = new java.util.ArrayList<Color>();
- for (int count = 0; count < cols.length; count++) {
- Color c1 = cols[count];
- if (c1.getAlpha() != 255) {
- LOG.warn("Opacity is not currently supported for Postscript output");
- }
- someColors.add(c1);
- }
- List<Double> theBounds = new java.util.ArrayList<Double>();
- for (int count = 1; count < fractions.length - 1; count++) {
- float offset = fractions[count];
- theBounds.add(Double.valueOf(offset));
- }
- PDFDeviceColorSpace colSpace;
- colSpace = new PDFDeviceColorSpace(PDFDeviceColorSpace.DEVICE_RGB);
-
- PSGradientFactory gradientFactory = (PSGradientFactory)GradientFactory.newInstance(this);
- PSPattern myPattern = gradientFactory.createGradient(false, colSpace,
- someColors, theBounds, theCoords, theMatrix);
-
- gen.write(myPattern.toString());
-
- }
-
-
-
- private void handleRadialGradient(RadialGradientPaint rgp, PSGenerator gen) throws IOException {
- MultipleGradientPaint.CycleMethodEnum cycle = rgp.getCycleMethod();
- if (cycle != MultipleGradientPaint.NO_CYCLE) {
- return;
- }
-
- AffineTransform transform;
- transform = new AffineTransform(getBaseTransform());
- transform.concatenate(getTransform());
- transform.concatenate(rgp.getTransform());
-
- AffineTransform resultCentre = applyTransform(rgp.getTransform(),
- rgp.getCenterPoint().getX(), rgp.getCenterPoint().getY());
- AffineTransform resultFocus = applyTransform(rgp.getTransform(),
- rgp.getFocusPoint().getX(), rgp.getFocusPoint().getY());
- double scale = Math.sqrt(rgp.getTransform().getDeterminant());
- double radius = rgp.getRadius() * scale;
- double centreX = resultCentre.getTranslateX();
- double centreY = resultCentre.getTranslateY();
- double focusX = resultFocus.getTranslateX();
- double focusY = resultFocus.getTranslateY();
-
- List<Double> theMatrix = new java.util.ArrayList<Double>();
- double [] mat = new double[6];
- transform.getMatrix(mat);
- for (int idx = 0; idx < mat.length; idx++) {
- theMatrix.add(Double.valueOf(mat[idx]));
- }
-
- List<Double> theCoords = new java.util.ArrayList<Double>();
- float[] fractions = rgp.getFractions();
-
- theCoords.add(centreX);
- theCoords.add(centreY);
- theCoords.add(radius * rgp.getFractions()[0]);
- theCoords.add(focusX);
- theCoords.add(focusY);
- theCoords.add(radius * fractions[fractions.length - 1]);
-
- Color[] cols = rgp.getColors();
- List<Color> someColors = new java.util.ArrayList<Color>();
- for (int count = 0; count < cols.length; count++) {
- Color cc = cols[count];
- if (cc.getAlpha() != 255) {
- /* This should never happen because radial gradients with opacity should now
- * be rasterized in the PSImageHandlerSVG class. Please see the shouldRaster()
- * method for more information. */
- LOG.warn("Opacity is not currently supported for Postscript output");
- }
-
- someColors.add(cc);
- }
-
- List<Double> theBounds = new java.util.ArrayList<Double>();
- for (int count = 1; count < fractions.length - 1; count++) {
- float offset = fractions[count];
- theBounds.add(Double.valueOf(offset));
- }
- PDFDeviceColorSpace colSpace;
- colSpace = new PDFDeviceColorSpace(PDFDeviceColorSpace.DEVICE_RGB);
-
- PSGradientFactory gradientFactory = (PSGradientFactory)GradientFactory.newInstance(this);
- PSPattern myPattern = gradientFactory.createGradient(true, colSpace,
- someColors, theBounds, theCoords, theMatrix);
-
- gen.write(myPattern.toString());
- }
-
- private AffineTransform applyTransform(AffineTransform base, double posX, double posY) {
- AffineTransform result = AffineTransform.getTranslateInstance(posX, posY);
- AffineTransform orig = base;
- orig.concatenate(result);
- return orig;
- }
-
- protected AffineTransform getBaseTransform() {
- AffineTransform at = new AffineTransform(this.getTransform());
- return at;
- }
-
- /**
- * Creates a new <code>Graphics</code> object that is
- * a copy of this <code>Graphics</code> object.
- * @return a new graphics context that is a copy of
- * this graphics context.
- */
- @Override
- public Graphics create() {
- preparePainting();
- return new PSSVGGraphics2D(this);
- }
-
- /**
- * Registers a function object against the output format document
- * @param function The function object to register
- * @return Returns either the function which has already been registered
- * or the current new registered object.
- */
- public Function registerFunction(Function function) {
- //Objects aren't needed to be registered in Postscript
- return function;
- }
-
- /**
- * Registers a shading object against the otuput format document
- * @param shading The shading object to register
- * @return Returs either the shading which has already been registered
- * or the current new registered object
- */
- public Shading registerShading(Shading shading) {
- //Objects aren't needed to be registered in Postscript
- return shading;
- }
-
- /**
- * Registers a pattern object against the output format document
- * @param pattern The pattern object to register
- * @return Returns either the pattern which has already been registered
- * or the current new registered object
- */
- public Pattern registerPattern(Pattern pattern) {
- // TODO Auto-generated method stub
- return pattern;
- }
- }
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