| /* ==================================================================== |
| 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.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.util.zip.InflaterInputStream; |
| |
| import org.apache.poi.hslf.exceptions.HSLFException; |
| import org.apache.poi.hslf.usermodel.HSLFPictureShape; |
| import org.apache.poi.hslf.usermodel.HSLFShape; |
| |
| /** |
| * Represents Macintosh PICT picture data. |
| * |
| * @author Yegor Kozlov |
| */ |
| public final class PICT extends Metafile { |
| |
| public PICT(){ |
| super(); |
| } |
| |
| /** |
| * Extract compressed PICT data from a ppt |
| */ |
| public byte[] getData(){ |
| byte[] rawdata = getRawData(); |
| try { |
| byte[] macheader = new byte[512]; |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| out.write(macheader); |
| int pos = CHECKSUM_SIZE; |
| byte[] pict; |
| try { |
| pict = read(rawdata, pos); |
| } catch (IOException e){ |
| //weird MAC behaviour. |
| //if failed to read right after the checksum - skip 16 bytes and try again |
| pict = read(rawdata, pos + 16); |
| } |
| out.write(pict); |
| return out.toByteArray(); |
| } catch (IOException e){ |
| throw new HSLFException(e); |
| } |
| } |
| |
| private byte[] read(byte[] data, int pos) throws IOException { |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| ByteArrayInputStream bis = new ByteArrayInputStream(data); |
| Header header = new Header(); |
| header.read(data, pos); |
| bis.skip(pos + header.getSize()); |
| InflaterInputStream inflater = new InflaterInputStream( bis ); |
| byte[] chunk = new byte[4096]; |
| int count; |
| while ((count = inflater.read(chunk)) >=0 ) { |
| out.write(chunk,0,count); |
| } |
| inflater.close(); |
| return out.toByteArray(); |
| } |
| |
| public void setData(byte[] data) throws IOException { |
| int pos = 512; //skip the first 512 bytes - they are MAC specific crap |
| byte[] compressed = compress(data, pos, data.length-pos); |
| |
| Header header = new Header(); |
| header.wmfsize = data.length - 512; |
| //we don't have a PICT reader in java, have to set default image size 200x200 |
| header.bounds = new java.awt.Rectangle(0, 0, 200, 200); |
| header.size = new java.awt.Dimension(header.bounds.width*HSLFShape.EMU_PER_POINT, |
| header.bounds.height*HSLFShape.EMU_PER_POINT); |
| header.zipsize = compressed.length; |
| |
| byte[] checksum = getChecksum(data); |
| ByteArrayOutputStream out = new ByteArrayOutputStream(); |
| out.write(checksum); |
| |
| out.write(new byte[16]); //16-byte prefix which is safe to ignore |
| header.write(out); |
| out.write(compressed); |
| |
| setRawData(out.toByteArray()); |
| } |
| |
| /** |
| * @see org.apache.poi.hslf.usermodel.HSLFPictureShape#PICT |
| */ |
| public int getType(){ |
| return HSLFPictureShape.PICT; |
| } |
| |
| /** |
| * PICT signature is <code>0x5430</code> |
| * |
| * @return PICT signature (<code>0x5430</code>) |
| */ |
| public int getSignature(){ |
| return 0x5430; |
| } |
| |
| public String getContentType() { |
| return "image/x-pict"; |
| } |
| |
| } |