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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.poi.xslf.draw;
-
- import java.awt.Dimension;
- import java.awt.Graphics2D;
- import java.awt.Insets;
- import java.awt.RenderingHints;
- import java.awt.geom.Rectangle2D;
- import java.awt.image.BufferedImage;
- import java.io.ByteArrayInputStream;
- import java.io.IOException;
- import java.io.InputStream;
- import java.lang.ref.WeakReference;
-
- import org.apache.batik.anim.dom.SAXSVGDocumentFactory;
- import org.apache.batik.bridge.BridgeContext;
- import org.apache.batik.bridge.DocumentLoader;
- import org.apache.batik.bridge.GVTBuilder;
- import org.apache.batik.bridge.UserAgent;
- import org.apache.batik.bridge.UserAgentAdapter;
- import org.apache.batik.ext.awt.RenderingHintsKeyExt;
- import org.apache.batik.ext.awt.image.renderable.ClipRable8Bit;
- import org.apache.batik.gvt.GraphicsNode;
- import org.apache.batik.util.XMLResourceDescriptor;
- import org.apache.poi.sl.draw.ImageRenderer;
- import org.apache.poi.sl.usermodel.PictureData;
- import org.w3c.dom.Document;
-
- public class SVGImageRenderer implements ImageRenderer {
- private final GVTBuilder builder = new GVTBuilder();
- private final BridgeContext context;
- private final SAXSVGDocumentFactory svgFact;
- private GraphicsNode svgRoot;
- private double alpha = 1.0;
-
- public SVGImageRenderer() {
- String parser = XMLResourceDescriptor.getXMLParserClassName();
- // TOOO: tell the batik guys to use secure parsing feature
- svgFact = new SAXSVGDocumentFactory(parser);
-
- UserAgent agent = new UserAgentAdapter();
- DocumentLoader loader = new DocumentLoader(agent);
- context = new BridgeContext(agent, loader);
- context.setDynamic(true);
- }
-
-
- @Override
- public void loadImage(InputStream data, String contentType) throws IOException {
- Document document = svgFact.createDocument("", data);
- svgRoot = builder.build(context, document);
- }
-
- @Override
- public void loadImage(byte[] data, String contentType) throws IOException {
- loadImage(new ByteArrayInputStream(data), contentType);
- }
-
- @Override
- public Dimension getDimension() {
- Rectangle2D r = svgRoot.getPrimitiveBounds();
- return new Dimension((int)Math.ceil(r.getWidth()), (int)Math.ceil(r.getHeight()));
- }
-
- @Override
- public void setAlpha(double alpha) {
- this.alpha = alpha;
- }
-
- @Override
- public BufferedImage getImage() {
- return getImage(getDimension());
- }
-
- @Override
- public BufferedImage getImage(Dimension dim) {
- BufferedImage bi = new BufferedImage((int)dim.getWidth(), (int)dim.getHeight(), BufferedImage.TYPE_INT_ARGB);
- Graphics2D g2d = (Graphics2D) bi.getGraphics();
- g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
- g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
- g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
- g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
- g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
- g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
- g2d.setRenderingHint(RenderingHintsKeyExt.KEY_BUFFERED_IMAGE, new WeakReference(bi));
- Dimension dimSVG = getDimension();
-
- double scaleX = dim.getWidth() / dimSVG.getWidth();
- double scaleY = dim.getHeight() / dimSVG.getHeight();
- g2d.scale(scaleX, scaleY);
-
- svgRoot.paint(g2d);
- g2d.dispose();
-
- return bi;
- }
-
- @Override
- public boolean drawImage(Graphics2D graphics, Rectangle2D anchor) {
- return drawImage(graphics, anchor, null);
- }
-
- @Override
- public boolean drawImage(Graphics2D graphics, Rectangle2D anchor, Insets clip) {
- if (clip == null) {
- svgRoot.setClip(null);
- } else {
- Rectangle2D clippedRect = new Rectangle2D.Double(
- anchor.getX()+clip.left,
- anchor.getY()+clip.top,
- anchor.getWidth()-(clip.left+clip.right),
- anchor.getHeight()-(clip.top+clip.bottom)
- );
- svgRoot.setClip(new ClipRable8Bit(null, clippedRect));
- }
-
- svgRoot.paint(graphics);
-
- return true;
- }
-
- @Override
- public boolean canRender(String contentType) {
- return PictureData.PictureType.SVG.contentType.equalsIgnoreCase(contentType);
- }
- }
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