root / trunk / libraries / libDwg / src / com / iver / cit / jdwglib / dwg / readers / DwgFileV15Reader.java @ 9843
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/* jdwglib. Java Library for reading Dwg files.
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*
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* Author: Jose Morell Rama (jose.morell@gmail.com).
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* Port from the Pythoncad Dwg library by Art Haas.
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*
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* Copyright (C) 2005 Jose Morell, IVER TI S.A. and Generalitat Valenciana
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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* For more information, contact:
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*
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* Jose Morell (jose.morell@gmail.com)
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*
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* or
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*
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* IVER TI S.A.
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* C/Salamanca, 50
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* 46005 Valencia
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* Spain
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* +34 963163400
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* dac@iver.es
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*/
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package com.iver.cit.jdwglib.dwg.readers; |
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import java.io.IOException; |
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import java.nio.ByteBuffer; |
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import java.nio.ByteOrder; |
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import java.util.ArrayList; |
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import com.iver.cit.gvsig.fmap.drivers.dgn.ByteUtils; |
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import com.iver.cit.jdwglib.dwg.DwgFile; |
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import com.iver.cit.jdwglib.dwg.DwgObject; |
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import com.iver.cit.jdwglib.dwg.DwgObjectFactory; |
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import com.iver.cit.jdwglib.dwg.DwgObjectOffset; |
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import com.iver.cit.jdwglib.dwg.DwgUtil; |
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import com.iver.cit.jdwglib.dwg.objects.DwgArc; |
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import com.iver.cit.jdwglib.dwg.objects.DwgAttdef; |
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import com.iver.cit.jdwglib.dwg.objects.DwgAttrib; |
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import com.iver.cit.jdwglib.dwg.objects.DwgBlock; |
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import com.iver.cit.jdwglib.dwg.objects.DwgBlockControl; |
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import com.iver.cit.jdwglib.dwg.objects.DwgBlockHeader; |
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import com.iver.cit.jdwglib.dwg.objects.DwgCircle; |
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import com.iver.cit.jdwglib.dwg.objects.DwgEllipse; |
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import com.iver.cit.jdwglib.dwg.objects.DwgEndblk; |
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import com.iver.cit.jdwglib.dwg.objects.DwgInsert; |
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import com.iver.cit.jdwglib.dwg.objects.DwgLayer; |
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import com.iver.cit.jdwglib.dwg.objects.DwgLayerControl; |
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import com.iver.cit.jdwglib.dwg.objects.DwgLine; |
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import com.iver.cit.jdwglib.dwg.objects.DwgLwPolyline; |
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import com.iver.cit.jdwglib.dwg.objects.DwgMText; |
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import com.iver.cit.jdwglib.dwg.objects.DwgPoint; |
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import com.iver.cit.jdwglib.dwg.objects.DwgPolyline2D; |
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import com.iver.cit.jdwglib.dwg.objects.DwgPolyline3D; |
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import com.iver.cit.jdwglib.dwg.objects.DwgSeqend; |
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import com.iver.cit.jdwglib.dwg.objects.DwgSolid; |
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import com.iver.cit.jdwglib.dwg.objects.DwgSpline; |
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import com.iver.cit.jdwglib.dwg.objects.DwgText; |
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import com.iver.cit.jdwglib.dwg.objects.DwgVertex2D; |
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import com.iver.cit.jdwglib.dwg.objects.DwgVertex3D; |
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import freenet.support.HexUtil; |
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/**
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* The DwgFileV15Reader reads the DWG version 15 format
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*
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* @author jmorell
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*/
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public class DwgFileV15Reader implements DwgFileReader { |
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protected DwgFile dwgFile;
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protected ByteBuffer bb; |
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/**
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* Reads the DWG version 15 format
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*
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* @param dwgFile Represents the DWG file that we want to read
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* @throws IOException When DWG file path is wrong
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*/
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public void read(DwgFile dwgFile, ByteBuffer bb) throws IOException { |
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this.dwgFile = dwgFile;
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this.bb = bb;
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readDwgSectionOffsets(); |
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try {
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readDwgObjectOffsets(); |
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//readDwgClasses(bb);
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} catch (Exception e) { |
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// System.out.println("Error leyendo offsets y classes. Posible corrupci?n en" +
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// "el DWG file ...");
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} |
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readDwgObjects(); |
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} |
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/**
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* It read the SECTIONS from the header of the DWG file
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* */
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protected void readDwgSectionOffsets() { |
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bb.position(19);
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bb.order(ByteOrder.LITTLE_ENDIAN);
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short codePage = bb.getShort();
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int count = bb.getInt();
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for (int i=0; i<count; i++) { |
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byte rec = bb.get();
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int seek = bb.getInt();
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int size = bb.getInt();
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if (rec==0) { |
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dwgFile.addDwgSectionOffset("HEADERS", seek, size);
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} else if (rec==1) { |
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dwgFile.addDwgSectionOffset("CLASSES", seek, size);
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} else if (rec==2) { |
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dwgFile.addDwgSectionOffset("OBJECTS", seek, size);
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} else if (rec==3) { |
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dwgFile.addDwgSectionOffset("UNKNOWN", seek, size);
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} else if (rec==4) { |
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dwgFile.addDwgSectionOffset("R14DATA", seek, size);
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} else if (rec==5) { |
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dwgFile.addDwgSectionOffset("R14REC5", seek, size);
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} else {
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// System.out.println("ERROR: C?digo de n?mero de registro no soportado: " + rec);
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} |
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} |
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} |
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/**
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* OpenDWG spec says:
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* This section -object map- is a table which gives the location of
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* each object in the DWG file.
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* This table is broken into sections. It is basically a list of
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* handle/file loc pairs. It could be readed with this pseudocode:
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*
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* Set lastHandle to all 0 and last loc to 0L.
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* Repeat until section size == 2
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* section size = read short (in bigendian order)
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* Repeat until out of data for this section
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* offset of this handle form last handle as modular char
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* offset of location in file from last location as modular char
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* End repeat
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* End repeat
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*
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* */
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protected void readDwgObjectOffsets() throws Exception { |
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int offset = dwgFile.getDwgSectionOffset("OBJECTS"); |
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bb.position(offset); |
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while (true) { |
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bb.order(ByteOrder.BIG_ENDIAN);
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/*
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* We read the size of the next section.
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* If size == 2, break (it is the last empty -except crc- section)
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* */
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short size = bb.getShort();
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if (size==2) |
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break;
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bb.order(ByteOrder.LITTLE_ENDIAN);
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byte[] dataBytes = new byte[size]; |
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for (int i=0; i<dataBytes.length; i++) { |
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dataBytes[i] = bb.get(); |
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} |
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int[] data = DwgUtil.bytesToMachineBytes(dataBytes); |
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int lastHandle=0; |
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int lastLoc=0; |
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int bitPos=0; |
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int bitMax= (size - 2) * 8; |
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while (bitPos < bitMax) {
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ArrayList v = DwgUtil.getModularChar(data, bitPos);
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bitPos = ((Integer)v.get(0)).intValue(); |
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lastHandle = lastHandle + ((Integer)v.get(1)).intValue(); |
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v = DwgUtil.getModularChar(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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lastLoc = lastLoc + ((Integer)v.get(1)).intValue(); |
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dwgFile.addDwgObjectOffset(lastHandle, lastLoc); |
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}//while
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}//while
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} |
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/*
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* Unused.
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*
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* Dwg spec says that drawing entities (objects) that has not
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* a fixed type must read its type from this section
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*
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*
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* */
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protected void readDwgClasses() throws Exception { |
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int offset = dwgFile.getDwgSectionOffset("CLASSES"); |
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// Por ahora nos saltamos los 16 bytes de control
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bb.position(offset+16);
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bb.order(ByteOrder.LITTLE_ENDIAN);
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int size = bb.getInt();
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byte[] dataBytes = new byte[size]; |
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for (int i=0; i<dataBytes.length; i++) { |
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dataBytes[i] = bb.get(); |
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} |
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int[] data = DwgUtil.bytesToMachineBytes(dataBytes); |
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for (int i=0; i<data.length; i++) { |
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data[i] = (byte)ByteUtils.getUnsigned((byte)data[i]); |
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} |
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bb.position(bb.position()+2+16); |
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int maxbit = size * 8; |
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int bitPos = 0; |
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while ((bitPos+8) < maxbit) { |
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ArrayList v = DwgUtil.getBitShort(data, bitPos);
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bitPos = ((Integer)v.get(0)).intValue(); |
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v = DwgUtil.getBitShort(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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v = DwgUtil.getTextString(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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v = DwgUtil.getTextString(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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v = DwgUtil.getTextString(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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v = DwgUtil.testBit(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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v = DwgUtil.getBitShort(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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} |
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} |
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/**
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* Reads all the object referenced in the object map section of the
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* DWG file (using their object file obsets)
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* */
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protected void readDwgObjects() { |
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for (int i=0; i<dwgFile.getDwgObjectOffsets().size(); i++) { |
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DwgObjectOffset doo = (DwgObjectOffset)dwgFile.getDwgObjectOffsets().get(i); |
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DwgObject obj = readDwgObject(doo.getOffset(), i); |
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/*
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azabala: las entidades DWG no implementadas no nos aportan nada
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(aunque la sigo leyendo por si aparecen problemas de puntero de fichero)
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No considero por tanto los DwgObject
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if (obj != null) {
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dwgFile.addDwgObject(obj);
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}
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*/
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if(obj != null && obj.getClass() != DwgObject.class){ |
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dwgFile.addDwgObject(obj); |
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} |
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} |
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} |
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/**
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* Return a dwg object from its index in the dwg file
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* @param index of the requested dwg object in the dwg file
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*
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* */
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public DwgObject getDwgObjectByIndex(int index){ |
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DwgObjectOffset doo = (DwgObjectOffset)dwgFile.getDwgObjectOffsets().get(index); |
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return readDwgObject(doo.getOffset(), index);
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} |
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/**
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* Reads a dwg drawing entity (dwg object) given its offset in the file
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* */
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protected DwgObject readDwgObject(int offset, int index) { |
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try {
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bb.position(offset); |
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int size = DwgUtil.getModularShort(bb);
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bb.order(ByteOrder.LITTLE_ENDIAN);
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byte[] dataBytes = new byte[size]; |
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String[] dataMachValString = new String[size]; |
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int[] data = new int[size]; |
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for (int i=0; i < size; i++) { |
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dataBytes[i] = bb.get(); |
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dataMachValString[i] = HexUtil.bytesToHex(new byte[]{dataBytes[i]}); |
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Integer dataMachValShort = Integer.decode("0x" + dataMachValString[i]); |
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data[i] = dataMachValShort.byteValue(); |
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data[i] = ByteUtils.getUnsigned((byte)data[i]);
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} |
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int bitPos = 0; |
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ArrayList v = DwgUtil.getBitShort(data, bitPos);
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bitPos = ((Integer)v.get(0)).intValue(); |
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int type = ((Integer)v.get(1)).intValue(); |
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DwgObject obj = DwgObjectFactory. |
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getInstance(). |
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create(type, index); |
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v = DwgUtil.getRawLong(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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int objBSize = ((Integer)v.get(1)).intValue(); |
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obj.setSizeInBits(objBSize); |
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ArrayList entityHandle = new ArrayList(); |
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v = DwgUtil.getHandle(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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for (int i=1;i<v.size();i++) { |
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entityHandle.add(v.get(i)); |
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} |
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obj.setHandle(DwgUtil. |
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handleBinToHandleInt(entityHandle)); |
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v = DwgUtil.readExtendedData(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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ArrayList extData = (ArrayList)v.get(1); |
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obj.setExtendedData(extData); |
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boolean gflag = false; |
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gflag = obj.isGraphicsFlag(); |
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if (gflag) {
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//lee un flag boolean
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v = DwgUtil.testBit(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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boolean val = ((Boolean)v.get(1)).booleanValue(); |
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//si hay imagen asociada, se lee por completo
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if (val) {
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v = DwgUtil.getRawLong(data, bitPos); |
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bitPos = ((Integer)v.get(0)).intValue(); |
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size = ((Integer)v.get(1)).intValue(); |
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int bgSize = size*8; |
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Integer giData = (Integer)DwgUtil.getBits(data, bgSize, bitPos); |
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obj.setGraphicData(giData.intValue()); |
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bitPos = bitPos + bgSize; |
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} |
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} |
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readSpecificObject(obj, data, bitPos); |
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return obj;
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} catch (Exception e) { |
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// System.out.println("Exception capturada. Probablemente se ha encontrado un" +
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// "objeto con type non fixed");
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//e.printStackTrace();
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return null; |
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} |
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} |
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/*
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* TODO Esto est? pesimamente dise?ado.
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* Cada objeto DwgObject debe tener un metodo
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* readSpecificObject(data,bitPos)
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*
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* */
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protected void readSpecificObject(DwgObject obj, int[] data, int bitPos) throws Exception { |
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if (obj.getType()==0x11) { |
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((DwgArc)obj).readDwgArcV15(data, bitPos); |
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} else if (obj.getType()==0x12) { |
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((DwgCircle)obj).readDwgCircleV15(data, bitPos); |
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} else if (obj.getType()==0x13) { |
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((DwgLine)obj).readDwgLineV15(data, bitPos); |
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} else if (obj.getType()==0x1B) { |
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((DwgPoint)obj).readDwgPointV15(data, bitPos); |
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} else if (obj.getType()==0x0F) { |
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((DwgPolyline2D)obj).readDwgPolyline2DV15(data, bitPos); |
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} else if (obj.getType()==0x10) { |
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((DwgPolyline3D)obj).readDwgPolyline3DV15(data, bitPos); |
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} else if (obj.getType()==0x0A) { |
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((DwgVertex2D)obj).readDwgVertex2DV15(data, bitPos); |
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} else if (obj.getType()==0x0B) { |
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((DwgVertex3D)obj).readDwgVertex3DV15(data, bitPos); |
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} else if (obj.getType()==0x6) { |
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((DwgSeqend)obj).readDwgSeqendV15(data, bitPos); |
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} else if (obj.getType()==0x1) { |
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((DwgText)obj).readDwgTextV15(data, bitPos); |
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} else if (obj.getType()==0x2) { |
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((DwgAttrib)obj).readDwgAttribV15(data, bitPos); |
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} else if (obj.getType()==0x3) { |
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((DwgAttdef)obj).readDwgAttdefV15(data, bitPos); |
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} else if (obj.getType()==0x4) { |
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((DwgBlock)obj).readDwgBlockV15(data, bitPos); |
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} else if (obj.getType()==0x5) { |
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((DwgEndblk)obj).readDwgEndblkV15(data, bitPos); |
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} else if (obj.getType()==0x30) { |
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((DwgBlockControl)obj).readDwgBlockControlV15(data, bitPos); |
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} else if (obj.getType()==0x31) { |
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((DwgBlockHeader)obj).readDwgBlockHeaderV15(data, bitPos); |
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} else if (obj.getType()==0x32) { |
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((DwgLayerControl)obj).readDwgLayerControlV15(data, bitPos); |
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} else if (obj.getType()==0x33) { |
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((DwgLayer)obj).readDwgLayerV15(data, bitPos); |
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} else if (obj.getType()==0x7) { |
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((DwgInsert)obj).readDwgInsertV15(data, bitPos); |
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} else if (obj.getType()==0x2C) { |
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((DwgMText)obj).readDwgMTextV15(data, bitPos); |
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} else if (obj.getType()==0x1F) { |
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((DwgSolid)obj).readDwgSolidV15(data, bitPos); |
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} else if (obj.getType()==0x23) { |
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((DwgEllipse)obj).readDwgEllipseV15(data, bitPos); |
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} else if (obj.getType()==0x24) { |
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((DwgSpline)obj).readDwgSplineV15(data, bitPos); |
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} else if (obj.getType()==0x14) { |
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//System.out.println("... detectado un dim del tipo 0x14 ...");
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} else if (obj.getType()==0x15) { |
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//System.out.println("... detectado un dim del tipo 0x15 ...");
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//((DwgLinearDimension)obj).readDwgLinearDimensionV15(data, bitPos);
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} else if (obj.getType()==0x16) { |
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//System.out.println("... detectado un dim del tipo 0x16 ...");
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} else if (obj.getType()==0x17) { |
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//System.out.println("... detectado un dim del tipo 0x17 ...");
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} else if (obj.getType()==0x18) { |
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//System.out.println("... detectado un dim del tipo 0x18 ...");
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} else if (obj.getType()==0x19) { |
| 411 |
//System.out.println("... detectado un dim del tipo 0x19 ...");
|
| 412 |
} else if (obj.getType()==0x1A) { |
| 413 |
//System.out.println("... detectado un dim del tipo 0x1A ...");
|
| 414 |
} else if (obj.getType()==0x4D) { |
| 415 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 416 |
} else if (obj.getType()==0x4E) { |
| 417 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 418 |
} else if (obj.getType()==0x4F) { |
| 419 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 420 |
} else if (obj.getType()==0x50) { |
| 421 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 422 |
} else if (obj.getType()==0x51) { |
| 423 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 424 |
} else if (obj.getType()==0x52) { |
| 425 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 426 |
} else if (obj.getType()==0x53) { |
| 427 |
((DwgLwPolyline)obj).readDwgLwPolylineV15(data, bitPos); |
| 428 |
} else {
|
| 429 |
//System.out.println("Tipo de objeto pendiente de implementaci?n");
|
| 430 |
} |
| 431 |
} |
| 432 |
} |