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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.awt.Rectangle;
- import java.io.ByteArrayInputStream;
- import java.io.ByteArrayOutputStream;
- import java.io.IOException;
- import java.io.OutputStream;
- import java.util.zip.DeflaterOutputStream;
-
- import org.apache.poi.ddf.EscherBSERecord;
- import org.apache.poi.ddf.EscherContainerRecord;
- import org.apache.poi.hslf.usermodel.HSLFPictureData;
- import org.apache.poi.hslf.usermodel.HSLFSlideShow;
- import org.apache.poi.util.Internal;
- import org.apache.poi.util.LittleEndian;
- import org.apache.poi.util.LittleEndianInputStream;
- import org.apache.poi.util.LittleEndianOutputStream;
- import org.apache.poi.util.Removal;
- import org.apache.poi.util.Units;
-
- /**
- * Represents a metafile picture which can be one of the following types: EMF, WMF, or PICT.
- * A metafile is stored compressed using the ZIP deflate/inflate algorithm.
- */
- public abstract class Metafile extends HSLFPictureData {
-
- /**
- * @deprecated Use {@link HSLFSlideShow#addPicture(byte[], PictureType)} or one of it's overloads to create new
- * {@link Metafile}. This API led to detached {@link Metafile} instances (See Bugzilla
- * 46122) and prevented adding additional functionality.
- */
- @Deprecated
- @Removal(version = "5.3")
- public Metafile() {
- 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
- protected Metafile(EscherContainerRecord recordContainer, EscherBSERecord bse) {
- super(recordContainer, bse);
- }
-
- /**
- * A structure which represents a 34-byte header preceding the compressed metafile data
- */
- public static class Header{
- private static final int RECORD_LENGTH = 34;
-
- /**
- * size of the original file
- */
- private int wmfsize;
-
- /**
- * Boundary of the metafile drawing commands
- */
- private final Rectangle bounds = new Rectangle();
-
- /**
- * Size of the metafile in EMUs
- */
- private final Dimension size = new Dimension();
-
- /**
- * size of the compressed metafile data
- */
- private int zipsize;
-
- /**
- * Reserved. Always 0.
- */
- private int compression;
-
- /**
- * Reserved. Always 254.
- */
- private int filter = 254;
-
- public void read(byte[] data, int offset){
- @SuppressWarnings("resource")
- LittleEndianInputStream leis = new LittleEndianInputStream(
- new ByteArrayInputStream(data, offset, RECORD_LENGTH));
-
- wmfsize = leis.readInt();
-
- int left = leis.readInt();
- int top = leis.readInt();
- int right = leis.readInt();
- int bottom = leis.readInt();
- bounds.setBounds(left, top, right-left, bottom-top);
-
- int width = leis.readInt();
- int height = leis.readInt();
- size.setSize(width, height);
-
- zipsize = leis.readInt();
- compression = leis.readUByte();
- filter = leis.readUByte();
- }
-
- public void write(OutputStream out) throws IOException {
- @SuppressWarnings("resource")
- LittleEndianOutputStream leos = new LittleEndianOutputStream(out);
-
- //hmf
- leos.writeInt(wmfsize);
- //left
- leos.writeInt(bounds.x);
- //top
- leos.writeInt(bounds.y);
- //right
- leos.writeInt(bounds.x + bounds.width);
- //bottom
- leos.writeInt(bounds.y + bounds.height);
- //inch
- leos.writeInt(size.width);
- //inch
- leos.writeInt(size.height);
- leos.writeInt(zipsize);
- leos.writeByte(compression);
- leos.writeByte(filter);
- }
-
- void write(byte[] destination, int offset) {
- //hmf
- LittleEndian.putInt(destination, offset, wmfsize);
- offset += 4;
-
- //left
- LittleEndian.putInt(destination, offset, bounds.x);
- offset += 4;
-
- //top
- LittleEndian.putInt(destination, offset, bounds.y);
- offset += 4;
-
- //right
- LittleEndian.putInt(destination, offset, bounds.x + bounds.width);
- offset += 4;
-
- //bottom
- LittleEndian.putInt(destination, offset, bounds.y + bounds.height);
- offset += 4;
-
- //inch
- LittleEndian.putInt(destination, offset, size.width);
- offset += 4;
-
- //inch
- LittleEndian.putInt(destination, offset, size.height);
- offset += 4;
-
- LittleEndian.putInt(destination, offset, zipsize);
- offset += 4;
-
- destination[offset] = (byte) compression;
- offset++;
-
- destination[offset] = (byte) filter;
- }
-
- public int getSize(){
- return 34;
- }
-
- public int getWmfSize() {
- return wmfsize;
- }
-
- protected void setWmfSize(int wmfSize) {
- this.wmfsize = wmfSize;
- }
-
- protected void setZipSize(int zipSize) {
- this.zipsize = zipSize;
- }
-
- public Rectangle getBounds() {
- return (Rectangle)bounds.clone();
- }
-
- protected void setBounds(Rectangle bounds) {
- this.bounds.setBounds(bounds);
- }
-
- protected void setDimension(Dimension size) {
- this.size.setSize(size);
- }
- }
-
- protected static byte[] compress(byte[] bytes, int offset, int length) {
- ByteArrayOutputStream out = new ByteArrayOutputStream();
- try (DeflaterOutputStream deflater = new DeflaterOutputStream(out)) {
- deflater.write(bytes, offset, length);
- } catch (IOException e) {
- // IOException won't get thrown by the DeflaterOutputStream in this configuration because:
- // 1. ByteArrayOutputStream doesn't throw an IOException during writes.
- // 2. The DeflaterOutputStream is not finished until we're done writing.
- throw new AssertionError("Won't happen", e);
- }
- return out.toByteArray();
- }
-
- @Override
- public Dimension getImageDimension() {
- int prefixLen = 16*getUIDInstanceCount();
- Header header = new Header();
- header.read(getRawData(), prefixLen);
- return new Dimension(
- (int)Math.round(Units.toPoints((long)header.size.getWidth())),
- (int)Math.round(Units.toPoints((long)header.size.getHeight()))
- );
- }
- }
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