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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.EOFException;
- import java.io.IOException;
- import java.util.zip.InflaterInputStream;
-
- import org.apache.logging.log4j.LogManager;
- import org.apache.logging.log4j.Logger;
- 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.ImageHeaderPICT;
- import org.apache.poi.util.IOUtils;
- import org.apache.poi.util.Internal;
- import org.apache.poi.util.Removal;
- import org.apache.poi.util.Units;
-
- import static org.apache.logging.log4j.util.Unbox.box;
-
- /**
- * Represents Macintosh PICT picture data.
- */
- public final class PICT extends Metafile {
- private static final Logger LOG = LogManager.getLogger(PICT.class);
-
- /**
- * @deprecated Use {@link HSLFSlideShow#addPicture(byte[], PictureType)} or one of it's overloads to create new
- * {@link PICT}. This API led to detached {@link PICT} instances (See Bugzilla
- * 46122) and prevented adding additional functionality.
- */
- @Deprecated
- @Removal(version = "5.3")
- public PICT() {
- 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 PICT(EscherContainerRecord recordContainer, EscherBSERecord bse) {
- super(recordContainer, bse);
- }
-
- @Override
- public byte[] getData(){
- byte[] rawdata = getRawData();
- try {
- byte[] macheader = new byte[512];
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- out.write(macheader);
- int pos = CHECKSUM_SIZE*getUIDInstanceCount();
- byte[] pict = read(rawdata, pos);
- out.write(pict);
- return out.toByteArray();
- } catch (IOException e){
- throw new HSLFException(e);
- }
- }
-
- private byte[] read(byte[] data, int pos) throws IOException {
- ByteArrayInputStream bis = new ByteArrayInputStream(data);
- Header header = new Header();
- header.read(data, pos);
- long bs_exp = (long)pos + header.getSize();
- long bs_act = IOUtils.skipFully(bis, bs_exp);
- if (bs_exp != bs_act) {
- throw new EOFException();
- }
- byte[] chunk = new byte[4096];
- ByteArrayOutputStream out = new ByteArrayOutputStream(header.getWmfSize());
- try (InflaterInputStream inflater = new InflaterInputStream(bis)) {
- int count;
- while ((count = inflater.read(chunk)) >= 0) {
- out.write(chunk, 0, count);
- // PICT zip-stream can be erroneous, so we clear the array to determine
- // the maximum of read bytes, after the inflater crashed
- bytefill(chunk, (byte) 0);
- }
- } catch (Exception e) {
- int lastLen;
- for (lastLen = chunk.length - 1; lastLen >= 0 && chunk[lastLen] == 0; lastLen--) ;
- if (++lastLen > 0) {
- if (header.getWmfSize() > out.size()) {
- // sometimes the wmfsize is smaller than the amount of already successfully read bytes
- // in this case we take the lastLen as-is, otherwise we truncate it to the given size
- lastLen = Math.min(lastLen, header.getWmfSize() - out.size());
- }
- out.write(chunk, 0, lastLen);
- }
- // End of picture marker for PICT is 0x00 0xFF
- LOG.atError().withThrowable(e).log("PICT zip-stream is invalid, read as much as possible. Uncompressed length of header: {} / Read bytes: {}", box(header.getWmfSize()),box(out.size()));
- }
- return out.toByteArray();
- }
-
- @Override
- protected byte[] formatImageForSlideshow(byte[] data) {
- // skip the first 512 bytes - they are MAC specific crap
- final int nOffset = ImageHeaderPICT.PICT_HEADER_OFFSET;
- ImageHeaderPICT nHeader = new ImageHeaderPICT(data, nOffset);
-
- Header header = new Header();
- int wmfSize = data.length - nOffset;
- header.setWmfSize(wmfSize);
- byte[] compressed = compress(data, nOffset, wmfSize);
- header.setZipSize(compressed.length);
- header.setBounds(nHeader.getBounds());
- Dimension nDim = nHeader.getSize();
- header.setDimension(new Dimension(Units.toEMU(nDim.getWidth()), Units.toEMU(nDim.getHeight())));
-
- 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.PICT;
- }
-
- /**
- * PICT signature is {@code 0x5420} or {@code 0x5430}
- *
- * @return PICT signature ({@code 0x5420} or {@code 0x5430})
- */
- public int getSignature(){
- return (getUIDInstanceCount() == 1 ? 0x5420 : 0x5430);
- }
-
- /**
- * Sets the PICT signature - either {@code 0x5420} or {@code 0x5430}
- */
- public void setSignature(int signature) {
- switch (signature) {
- case 0x5420:
- setUIDInstanceCount(1);
- break;
- case 0x5430:
- setUIDInstanceCount(2);
- break;
- default:
- throw new IllegalArgumentException(signature+" is not a valid instance/signature value for PICT");
- }
- }
-
-
- /*
- * initialize a smaller piece of the array and use the System.arraycopy
- * call to fill in the rest of the array in an expanding binary fashion
- */
- private static void bytefill(byte[] array, byte value) {
- // http://stackoverflow.com/questions/9128737/fastest-way-to-set-all-values-of-an-array
- int len = array.length;
-
- if (len > 0){
- array[0] = value;
- }
-
- for (int i = 1; i < len; i += i) {
- System.arraycopy(array, 0, array, i, Math.min(len - i, i));
- }
- }
- }
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