| /* ==================================================================== |
| 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.hwmf.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.awt.image.RescaleOp; |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import org.apache.poi.hwmf.usermodel.HwmfPicture; |
| import org.apache.poi.sl.draw.DrawPictureShape; |
| import org.apache.poi.sl.draw.ImageRenderer; |
| import org.apache.poi.sl.usermodel.PictureData; |
| import org.apache.poi.util.Units; |
| |
| /** |
| * Helper class which is instantiated by {@link DrawPictureShape} |
| * via reflection |
| */ |
| public class HwmfSLImageRenderer implements ImageRenderer { |
| HwmfPicture image; |
| double alpha; |
| |
| @Override |
| public void loadImage(InputStream data, String contentType) throws IOException { |
| if (!PictureData.PictureType.WMF.contentType.equals(contentType)) { |
| throw new IOException("Invalid picture type"); |
| } |
| image = new HwmfPicture(data); |
| } |
| |
| @Override |
| public void loadImage(byte[] data, String contentType) throws IOException { |
| if (!PictureData.PictureType.WMF.contentType.equals(contentType)) { |
| throw new IOException("Invalid picture type"); |
| } |
| image = new HwmfPicture(new ByteArrayInputStream(data)); |
| } |
| |
| @Override |
| public Dimension getDimension() { |
| int width = 0, height = 0; |
| if (image != null) { |
| Dimension dim = image.getSize(); |
| width = Units.pointsToPixel(dim.getWidth()); |
| // keep aspect ratio for height |
| height = Units.pointsToPixel(dim.getHeight()); |
| } |
| return new Dimension(width, height); |
| } |
| |
| @Override |
| public void setAlpha(double alpha) { |
| this.alpha = alpha; |
| } |
| |
| @Override |
| public BufferedImage getImage() { |
| return getImage(getDimension()); |
| } |
| |
| @Override |
| public BufferedImage getImage(Dimension dim) { |
| if (image == null) { |
| return new BufferedImage(1, 1, BufferedImage.TYPE_INT_ARGB); |
| } |
| |
| BufferedImage bufImg = new BufferedImage((int)dim.getWidth(), (int)dim.getHeight(), BufferedImage.TYPE_INT_ARGB); |
| Graphics2D g = bufImg.createGraphics(); |
| g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); |
| g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY); |
| g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC); |
| g.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON); |
| image.draw(g, new Rectangle2D.Double(0,0,dim.getWidth(),dim.getHeight())); |
| g.dispose(); |
| |
| if (alpha != 0) { |
| BufferedImage newImg = new BufferedImage((int)dim.getWidth(), (int)dim.getHeight(), BufferedImage.TYPE_INT_ARGB); |
| g = newImg.createGraphics(); |
| RescaleOp op = new RescaleOp(new float[]{1.0f, 1.0f, 1.0f, (float)alpha}, new float[]{0,0,0,0}, null); |
| g.drawImage(bufImg, op, 0, 0); |
| g.dispose(); |
| bufImg = newImg; |
| } |
| |
| return bufImg; |
| } |
| |
| @Override |
| public boolean drawImage(Graphics2D graphics, Rectangle2D anchor) { |
| return drawImage(graphics, anchor, null); |
| } |
| |
| @Override |
| public boolean drawImage(Graphics2D graphics, Rectangle2D anchor, Insets clip) { |
| if (image == null) { |
| return false; |
| } else { |
| image.draw(graphics, anchor); |
| return true; |
| } |
| } |
| } |