| /* ==================================================================== |
| 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.hslf.blip; |
| |
| import java.awt.Dimension; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.zip.InflaterInputStream; |
| |
| import org.apache.poi.hslf.exceptions.HSLFException; |
| import org.apache.poi.sl.image.ImageHeaderEMF; |
| import org.apache.poi.util.IOUtils; |
| import org.apache.poi.util.Units; |
| |
| /** |
| * Represents EMF (Windows Enhanced Metafile) picture data. |
| */ |
| public final class EMF extends Metafile { |
| |
| @Override |
| public byte[] getData(){ |
| try { |
| byte[] rawdata = getRawData(); |
| |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| InputStream is = new ByteArrayInputStream( rawdata ); |
| Header header = new Header(); |
| header.read(rawdata, CHECKSUM_SIZE); |
| long len = IOUtils.skipFully(is,header.getSize() + (long)CHECKSUM_SIZE); |
| assert(len == header.getSize() + CHECKSUM_SIZE); |
| |
| InflaterInputStream inflater = new InflaterInputStream( is ); |
| byte[] chunk = new byte[4096]; |
| int count; |
| while ((count = inflater.read(chunk)) >=0 ) { |
| out.write(chunk,0,count); |
| } |
| inflater.close(); |
| return out.toByteArray(); |
| } catch (IOException e){ |
| throw new HSLFException(e); |
| } |
| } |
| |
| @Override |
| public void setData(byte[] data) throws IOException { |
| byte[] compressed = compress(data, 0, data.length); |
| |
| ImageHeaderEMF nHeader = new ImageHeaderEMF(data, 0); |
| |
| Header header = new Header(); |
| header.setWmfSize(data.length); |
| header.setBounds(nHeader.getBounds()); |
| Dimension nDim = nHeader.getSize(); |
| header.setDimension(new Dimension(Units.toEMU(nDim.getWidth()), Units.toEMU(nDim.getHeight()))); |
| header.setZipSize(compressed.length); |
| |
| byte[] checksum = getChecksum(data); |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| out.write(checksum); |
| if (getUIDInstanceCount() == 2) { |
| out.write(checksum); |
| } |
| header.write(out); |
| out.write(compressed); |
| |
| setRawData(out.toByteArray()); |
| } |
| |
| @Override |
| public PictureType getType(){ |
| return PictureType.EMF; |
| } |
| |
| /** |
| * EMF signature is {@code 0x3D40} or {@code 0x3D50} |
| * |
| * @return EMF signature ({@code 0x3D40} or {@code 0x3D50}) |
| */ |
| public int getSignature(){ |
| return (getUIDInstanceCount() == 1 ? 0x3D40 : 0x3D50); |
| } |
| |
| /** |
| * Sets the EMF signature - either {@code 0x3D40} or {@code 0x3D50} |
| */ |
| public void setSignature(int signature) { |
| switch (signature) { |
| case 0x3D40: |
| setUIDInstanceCount(1); |
| break; |
| case 0x3D50: |
| setUIDInstanceCount(2); |
| break; |
| default: |
| throw new IllegalArgumentException(signature+" is not a valid instance/signature value for EMF"); |
| } |
| } |
| } |