/* ==================================================================== | |
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 = null; | |
double alpha = 0; | |
@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; | |
} | |
} | |
} |