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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.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.ddf.EscherBSERecord;
- import org.apache.poi.ddf.EscherContainerRecord;
- import org.apache.poi.hslf.exceptions.HSLFException;
- import org.apache.poi.hslf.usermodel.HSLFSlideShow;
- import org.apache.poi.sl.image.ImageHeaderWMF;
- import org.apache.poi.util.IOUtils;
- import org.apache.poi.util.Internal;
- import org.apache.poi.util.Removal;
- import org.apache.poi.util.Units;
-
- /**
- * Represents a WMF (Windows Metafile) picture data.
- */
- public final class WMF extends Metafile {
-
- /**
- * @deprecated Use {@link HSLFSlideShow#addPicture(byte[], PictureType)} or one of it's overloads to create new
- * {@link WMF}. This API led to detached {@link WMF} instances (See Bugzilla
- * 46122) and prevented adding additional functionality.
- */
- @Deprecated
- @Removal(version = "5.3")
- public WMF() {
- this(new EscherContainerRecord(), new EscherBSERecord());
- }
-
- /**
- * Creates a new instance.
- *
- * @param recordContainer Record tracking all pictures. Should be attached to the slideshow that this picture is
- * linked to.
- * @param bse Record referencing this picture. Should be attached to the slideshow that this picture is linked to.
- */
- @Internal
- public WMF(EscherContainerRecord recordContainer, EscherBSERecord bse) {
- super(recordContainer, bse);
- }
-
- @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*getUIDInstanceCount());
- long skipLen = header.getSize() + (long)CHECKSUM_SIZE*getUIDInstanceCount();
- long skipped = IOUtils.skipFully(is, skipLen);
- assert(skipped == skipLen);
-
- ImageHeaderWMF aldus = new ImageHeaderWMF(header.getBounds());
- aldus.write(out);
-
- 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
- protected byte[] formatImageForSlideshow(byte[] data) {
- int pos = 0;
- ImageHeaderWMF nHeader = new ImageHeaderWMF(data, pos);
- pos += nHeader.getLength();
-
- byte[] compressed = compress(data, pos, data.length-pos);
-
- Header header = new Header();
- header.setWmfSize(data.length - nHeader.getLength());
- 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);
- byte[] rawData = new byte[checksum.length * getUIDInstanceCount() + header.getSize() + compressed.length];
- int offset = 0;
-
- System.arraycopy(checksum, 0, rawData, offset, checksum.length);
- offset += checksum.length;
-
- if (getUIDInstanceCount() == 2) {
- System.arraycopy(checksum, 0, rawData, offset, checksum.length);
- offset += checksum.length;
- }
-
- header.write(rawData, offset);
- offset += header.getSize();
- System.arraycopy(compressed, 0, rawData, offset, compressed.length);
-
- return rawData;
- }
-
- @Override
- public PictureType getType(){
- return PictureType.WMF;
- }
-
- /**
- * WMF signature is either {@code 0x2160} or {@code 0x2170}
- */
- public int getSignature(){
- return (getUIDInstanceCount() == 1 ? 0x2160 : 0x2170);
- }
-
- /**
- * Sets the WMF signature - either {@code 0x2160} or {@code 0x2170}
- */
- public void setSignature(int signature) {
- switch (signature) {
- case 0x2160:
- setUIDInstanceCount(1);
- break;
- case 0x2170:
- setUIDInstanceCount(2);
- break;
- default:
- throw new IllegalArgumentException(signature+" is not a valid instance/signature value for WMF");
- }
- }
- }
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