mirror of https://github.com/apache/poi.git
PPTX2PNG - fix SVG gradients
git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1874150 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andreas Beeker
parent
221f840adb
commit
bc969fe4aa
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@ -42,7 +42,7 @@ import java.awt.image.WritableRaster;
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import org.apache.poi.util.Internal;
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@Internal
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class PathGradientPaint implements Paint {
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public class PathGradientPaint implements Paint {
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// http://asserttrue.blogspot.de/2010/01/how-to-iimplement-custom-paint-in-50.html
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private final Color[] colors;
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@ -72,7 +72,8 @@ class PathGradientPaint implements Paint {
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this.transparency = opaque ? OPAQUE : TRANSLUCENT;
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}
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public PaintContext createContext(ColorModel cm,
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@Override
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public PathGradientContext createContext(ColorModel cm,
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Rectangle deviceBounds,
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Rectangle2D userBounds,
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AffineTransform transform,
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@ -84,7 +85,7 @@ class PathGradientPaint implements Paint {
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return transparency;
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}
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class PathGradientContext implements PaintContext {
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public class PathGradientContext implements PaintContext {
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final Rectangle deviceBounds;
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final Rectangle2D userBounds;
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protected final AffineTransform xform;
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@ -134,7 +135,7 @@ class PathGradientPaint implements Paint {
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public Raster getRaster(int xOffset, int yOffset, int w, int h) {
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ColorModel cm = getColorModel();
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if (raster == null) createRaster();
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raster = createRaster();
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// TODO: eventually use caching here
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WritableRaster childRaster = cm.createCompatibleWritableRaster(w, h);
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@ -175,9 +176,11 @@ class PathGradientPaint implements Paint {
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return upper;
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}
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public WritableRaster createRaster() {
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if (raster != null) {
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return raster;
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}
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void createRaster() {
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ColorModel cm = getColorModel();
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raster = cm.createCompatibleWritableRaster((int)deviceBounds.getWidth(), (int)deviceBounds.getHeight());
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BufferedImage img = new BufferedImage(cm, raster, false, null);
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@ -205,6 +208,7 @@ class PathGradientPaint implements Paint {
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}
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graphics.dispose();
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return raster;
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}
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}
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}
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@ -0,0 +1,72 @@
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/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ====================================================================
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*/
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package org.apache.poi.xslf.draw;
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import java.awt.RenderingHints;
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import java.util.Map;
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import org.apache.batik.svggen.SVGGeneratorContext;
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import org.apache.batik.svggen.SVGGeneratorContext.GraphicContextDefaults;
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import org.apache.batik.svggen.SVGGraphics2D;
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import org.apache.poi.util.Internal;
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import org.w3c.dom.Document;
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/**
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* Wrapper class to pass changes to rendering hints down to the svg graphics context defaults
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* which can be read by the extension handlers
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*/
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@Internal
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public class SVGPOIGraphics2D extends SVGGraphics2D {
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private final RenderingHints hints;
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public SVGPOIGraphics2D(Document document) {
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super(getCtx(document), false);
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hints = getGeneratorContext().getGraphicContextDefaults().getRenderingHints();
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}
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private static SVGGeneratorContext getCtx(Document document) {
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SVGGeneratorContext context = SVGGeneratorContext.createDefault(document);
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context.setExtensionHandler(new SVGRenderExtension());
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GraphicContextDefaults defs = new GraphicContextDefaults();
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defs.setRenderingHints(new RenderingHints(null));
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context.setGraphicContextDefaults(defs);
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return context;
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}
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@Override
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public void setRenderingHint(RenderingHints.Key hintKey, Object hintValue) {
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hints.put(hintKey, hintValue);
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super.setRenderingHint(hintKey, hintValue);
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}
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@Override
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public void setRenderingHints(Map hints) {
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this.hints.clear();
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this.hints.putAll(hints);
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super.setRenderingHints(hints);
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}
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@Override
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public void addRenderingHints(Map hints) {
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this.hints.putAll(hints);
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super.addRenderingHints(hints);
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}
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}
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@ -0,0 +1,185 @@
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/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.xslf.draw;
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import static java.awt.MultipleGradientPaint.ColorSpaceType.LINEAR_RGB;
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import static org.apache.batik.util.SVGConstants.*;
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import java.awt.Color;
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import java.awt.LinearGradientPaint;
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import java.awt.MultipleGradientPaint;
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import java.awt.Paint;
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import java.awt.RadialGradientPaint;
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import java.awt.RenderingHints;
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import java.awt.Shape;
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import java.awt.TexturePaint;
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import java.awt.geom.AffineTransform;
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import java.awt.geom.Point2D;
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import java.awt.image.BufferedImage;
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import java.awt.image.ColorModel;
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import java.awt.image.WritableRaster;
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import org.apache.batik.svggen.DefaultExtensionHandler;
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import org.apache.batik.svggen.SVGColor;
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import org.apache.batik.svggen.SVGGeneratorContext;
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import org.apache.batik.svggen.SVGPaintDescriptor;
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import org.apache.batik.svggen.SVGTexturePaint;
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import org.apache.poi.sl.draw.Drawable;
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import org.apache.poi.sl.draw.PathGradientPaint;
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import org.apache.poi.sl.draw.PathGradientPaint.PathGradientContext;
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import org.apache.poi.util.Internal;
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import org.w3c.dom.Element;
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/**
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* Extension of Batik's DefaultExtensionHandler which handles different kinds of Paint objects
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* <p>
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* Taken (with permission) from https://gist.github.com/msteiger/4509119,
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* including the fixes that are discussed in the comments
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*
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* @author Martin Steiger
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*
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* @see <a href="https://stackoverflow.com/questions/14258206/">Gradient paints not working in Apache Batik's svggen</a>
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* @see <a href="https://issues.apache.org/jira/browse/BATIK-1032">BATIK-1032</a>
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*/
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@Internal
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public class SVGRenderExtension extends DefaultExtensionHandler {
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@Override
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public SVGPaintDescriptor handlePaint(Paint paint, SVGGeneratorContext generatorContext) {
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if (paint instanceof LinearGradientPaint) {
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return getLgpDescriptor((LinearGradientPaint)paint, generatorContext);
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}
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if (paint instanceof RadialGradientPaint) {
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return getRgpDescriptor((RadialGradientPaint)paint, generatorContext);
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}
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if (paint instanceof PathGradientPaint) {
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return getPathDescriptor((PathGradientPaint)paint, generatorContext);
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}
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return super.handlePaint(paint, generatorContext);
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}
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private SVGPaintDescriptor getPathDescriptor(PathGradientPaint gradient, SVGGeneratorContext genCtx) {
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RenderingHints hints = genCtx.getGraphicContextDefaults().getRenderingHints();
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Shape shape = (Shape)hints.get(Drawable.GRADIENT_SHAPE);
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if (shape == null) {
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return null;
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}
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PathGradientContext context = gradient.createContext(ColorModel.getRGBdefault(), shape.getBounds(), shape.getBounds2D(), new AffineTransform(), hints);
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WritableRaster raster = context.createRaster();
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BufferedImage img = new BufferedImage(context.getColorModel(), raster, false, null);
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SVGTexturePaint texturePaint = new SVGTexturePaint(genCtx);
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TexturePaint tp = new TexturePaint(img, shape.getBounds2D());
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return texturePaint.toSVG(tp);
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}
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private SVGPaintDescriptor getRgpDescriptor(RadialGradientPaint gradient, SVGGeneratorContext genCtx) {
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Element gradElem = genCtx.getDOMFactory().createElementNS(SVG_NAMESPACE_URI, SVG_RADIAL_GRADIENT_TAG);
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// Create and set unique XML id
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String id = genCtx.getIDGenerator().generateID("gradient");
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gradElem.setAttribute(SVG_ID_ATTRIBUTE, id);
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// Set x,y pairs
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setPoint(gradElem, gradient.getCenterPoint(), "cx", "cy");
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setPoint(gradElem, gradient.getFocusPoint(), "fx", "fy");
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gradElem.setAttribute("r", String.valueOf(gradient.getRadius()));
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addMgpAttributes(gradElem, genCtx, gradient);
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return new SVGPaintDescriptor("url(#" + id + ")", SVG_OPAQUE_VALUE, gradElem);
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}
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private SVGPaintDescriptor getLgpDescriptor(LinearGradientPaint gradient, SVGGeneratorContext genCtx) {
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Element gradElem = genCtx.getDOMFactory().createElementNS(SVG_NAMESPACE_URI, SVG_LINEAR_GRADIENT_TAG);
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// Create and set unique XML id
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String id = genCtx.getIDGenerator().generateID("gradient");
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gradElem.setAttribute(SVG_ID_ATTRIBUTE, id);
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// Set x,y pairs
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setPoint(gradElem, gradient.getStartPoint(), "x1", "y1");
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setPoint(gradElem, gradient.getEndPoint(), "x2", "y2");
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addMgpAttributes(gradElem, genCtx, gradient);
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return new SVGPaintDescriptor("url(#" + id + ")", SVG_OPAQUE_VALUE, gradElem);
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}
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private void addMgpAttributes(Element gradElem, SVGGeneratorContext genCtx, MultipleGradientPaint gradient) {
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gradElem.setAttribute(SVG_GRADIENT_UNITS_ATTRIBUTE, SVG_USER_SPACE_ON_USE_VALUE);
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// Set cycle method
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final String cycleVal;
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switch (gradient.getCycleMethod()) {
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case REFLECT:
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cycleVal = SVG_REFLECT_VALUE;
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break;
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case REPEAT:
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cycleVal = SVG_REPEAT_VALUE;
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break;
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case NO_CYCLE:
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default:
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cycleVal = SVG_PAD_VALUE;
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break;
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}
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gradElem.setAttribute(SVG_SPREAD_METHOD_ATTRIBUTE, cycleVal);
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// Set color space
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final String colorSpace = (gradient.getColorSpace() == LINEAR_RGB) ? SVG_LINEAR_RGB_VALUE : SVG_SRGB_VALUE;
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gradElem.setAttribute(SVG_COLOR_INTERPOLATION_ATTRIBUTE, colorSpace);
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// Set transform matrix if not identity
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AffineTransform tf = gradient.getTransform();
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if (!tf.isIdentity()) {
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String matrix = "matrix(" + tf.getScaleX() + " " + tf.getShearY()
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+ " " + tf.getShearX() + " " + tf.getScaleY() + " "
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+ tf.getTranslateX() + " " + tf.getTranslateY() + ")";
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gradElem.setAttribute(SVG_GRADIENT_TRANSFORM_ATTRIBUTE, matrix);
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}
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// Convert gradient stops
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Color[] colors = gradient.getColors();
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float[] fracs = gradient.getFractions();
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for (int i = 0; i < colors.length; i++) {
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Element stop = genCtx.getDOMFactory().createElementNS(SVG_NAMESPACE_URI, SVG_STOP_TAG);
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SVGPaintDescriptor pd = SVGColor.toSVG(colors[i], genCtx);
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stop.setAttribute(SVG_OFFSET_ATTRIBUTE, (int) (fracs[i] * 100.0f) + "%");
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stop.setAttribute(SVG_STOP_COLOR_ATTRIBUTE, pd.getPaintValue());
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if (colors[i].getAlpha() != 255) {
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stop.setAttribute(SVG_STOP_OPACITY_ATTRIBUTE, pd.getOpacityValue());
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}
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gradElem.appendChild(stop);
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}
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}
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private static void setPoint(Element gradElem, Point2D point, String x, String y) {
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gradElem.setAttribute(x, Double.toString(point.getX()));
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gradElem.setAttribute(y, Double.toString(point.getY()));
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}
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}
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@ -0,0 +1,109 @@
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/*
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* ====================================================================
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* ====================================================================
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*/
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package org.apache.poi.xslf.util;
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import java.awt.Dimension;
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import java.awt.Graphics2D;
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import java.awt.image.BufferedImage;
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import java.io.Closeable;
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import java.io.File;
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import java.io.IOException;
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import java.lang.ref.WeakReference;
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import javax.imageio.ImageIO;
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import org.apache.batik.dom.GenericDOMImplementation;
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import org.apache.batik.svggen.SVGGraphics2D;
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import org.apache.poi.sl.draw.Drawable;
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import org.apache.poi.util.Internal;
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import org.apache.poi.xslf.draw.SVGPOIGraphics2D;
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import org.w3c.dom.DOMImplementation;
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import org.w3c.dom.Document;
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/**
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* Output formats for PPTX2PNG
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*/
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@Internal
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interface OutputFormat extends Closeable {
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Graphics2D getGraphics2D(double width, double height);
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void writeOut(MFProxy proxy, File outFile) throws IOException;
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class SVGFormat implements OutputFormat {
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static final String svgNS = "http://www.w3.org/2000/svg";
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private SVGGraphics2D svgGenerator;
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@Override
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public Graphics2D getGraphics2D(double width, double height) {
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// Get a DOMImplementation.
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DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
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// Create an instance of org.w3c.dom.Document.
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Document document = domImpl.createDocument(svgNS, "svg", null);
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svgGenerator = new SVGPOIGraphics2D(document);
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svgGenerator.setSVGCanvasSize(new Dimension((int)width, (int)height));
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return svgGenerator;
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}
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@Override
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public void writeOut(MFProxy proxy, File outFile) throws IOException {
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svgGenerator.stream(outFile.getCanonicalPath(), true);
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}
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@Override
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public void close() throws IOException {
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svgGenerator.dispose();
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}
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}
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class BitmapFormat implements OutputFormat {
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private final String format;
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private BufferedImage img;
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private Graphics2D graphics;
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BitmapFormat(String format) {
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this.format = format;
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}
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@Override
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public Graphics2D getGraphics2D(double width, double height) {
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img = new BufferedImage((int)width, (int)height, BufferedImage.TYPE_INT_ARGB);
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graphics = img.createGraphics();
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graphics.setRenderingHint(Drawable.BUFFERED_IMAGE, new WeakReference<>(img));
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return graphics;
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}
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@Override
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public void writeOut(MFProxy proxy, File outFile) throws IOException {
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if (!"null".equals(format)) {
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ImageIO.write(img, format, outFile);
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}
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}
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@Override
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public void close() throws IOException {
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if (graphics != null) {
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graphics.dispose();
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img.flush();
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}
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}
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}
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}
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@ -20,33 +20,24 @@
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package org.apache.poi.xslf.util;
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import java.awt.AlphaComposite;
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import java.awt.Dimension;
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import java.awt.Graphics2D;
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import java.awt.RenderingHints;
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import java.awt.geom.Dimension2D;
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import java.awt.image.BufferedImage;
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import java.io.Closeable;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.lang.ref.WeakReference;
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import java.util.Locale;
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import java.util.Set;
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import java.util.regex.Pattern;
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import javax.imageio.ImageIO;
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import org.apache.batik.dom.GenericDOMImplementation;
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import org.apache.batik.svggen.SVGGraphics2D;
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import org.apache.poi.common.usermodel.GenericRecord;
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import org.apache.poi.poifs.filesystem.FileMagic;
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import org.apache.poi.sl.draw.Drawable;
|
||||
import org.apache.poi.sl.draw.EmbeddedExtractor.EmbeddedPart;
|
||||
import org.apache.poi.util.Dimension2DDouble;
|
||||
import org.apache.poi.util.GenericRecordJsonWriter;
|
||||
import org.w3c.dom.DOMImplementation;
|
||||
import org.w3c.dom.Document;
|
||||
import org.apache.poi.xslf.util.OutputFormat.BitmapFormat;
|
||||
import org.apache.poi.xslf.util.OutputFormat.SVGFormat;
|
||||
|
||||
/**
|
||||
* An utility to convert slides of a .pptx slide show to a PNG image
|
||||
|
|
@ -266,7 +257,7 @@ public final class PPTX2PNG {
|
|||
// draw stuff
|
||||
proxy.draw(graphics);
|
||||
|
||||
outputFormat.writeOut(proxy, slideNo);
|
||||
outputFormat.writeOut(proxy, new File(outdir, calcOutFile(proxy, slideNo)));
|
||||
}
|
||||
}
|
||||
} catch (NoScratchpadException e) {
|
||||
|
|
@ -395,70 +386,4 @@ public final class PPTX2PNG {
|
|||
super(cause);
|
||||
}
|
||||
}
|
||||
|
||||
private interface OutputFormat extends Closeable {
|
||||
Graphics2D getGraphics2D(double width, double height);
|
||||
void writeOut(MFProxy proxy, int slideNo) throws IOException;
|
||||
}
|
||||
|
||||
private class SVGFormat implements OutputFormat {
|
||||
static final String svgNS = "http://www.w3.org/2000/svg";
|
||||
private SVGGraphics2D svgGenerator;
|
||||
|
||||
@Override
|
||||
public Graphics2D getGraphics2D(double width, double height) {
|
||||
// Get a DOMImplementation.
|
||||
DOMImplementation domImpl = GenericDOMImplementation.getDOMImplementation();
|
||||
|
||||
// Create an instance of org.w3c.dom.Document.
|
||||
Document document = domImpl.createDocument(svgNS, "svg", null);
|
||||
svgGenerator = new SVGGraphics2D(document);
|
||||
svgGenerator.setSVGCanvasSize(new Dimension((int)width, (int)height));
|
||||
return svgGenerator;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void writeOut(MFProxy proxy, int slideNo) throws IOException {
|
||||
File outfile = new File(outdir, calcOutFile(proxy, slideNo));
|
||||
svgGenerator.stream(outfile.getCanonicalPath(), true);
|
||||
}
|
||||
|
||||
@Override
|
||||
public void close() throws IOException {
|
||||
svgGenerator.dispose();
|
||||
}
|
||||
}
|
||||
|
||||
private class BitmapFormat implements OutputFormat {
|
||||
private final String format;
|
||||
private BufferedImage img;
|
||||
private Graphics2D graphics;
|
||||
|
||||
BitmapFormat(String format) {
|
||||
this.format = format;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Graphics2D getGraphics2D(double width, double height) {
|
||||
img = new BufferedImage((int)width, (int)height, BufferedImage.TYPE_INT_ARGB);
|
||||
graphics = img.createGraphics();
|
||||
graphics.setRenderingHint(Drawable.BUFFERED_IMAGE, new WeakReference<>(img));
|
||||
return graphics;
|
||||
}
|
||||
|
||||
@Override
|
||||
public void writeOut(MFProxy proxy, int slideNo) throws IOException {
|
||||
if (!"null".equals(format)) {
|
||||
ImageIO.write(img, format, new File(outdir, calcOutFile(proxy, slideNo)));
|
||||
}
|
||||
}
|
||||
|
||||
@Override
|
||||
public void close() throws IOException {
|
||||
if (graphics != null) {
|
||||
graphics.dispose();
|
||||
img.flush();
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue