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