// Write all object, return the file pos of first index block.
int WriteObjects()
{
int firstIndexBlock = 0;
int offsetPrevBlock = 0;
OcadIndexBlock currBlock = new OcadIndexBlock();
int index, count, total;
ICollection<Symbol> symbols = map.AllSymbols;
total = symbols.Count;
index = 0; count = 0;
foreach (Symbol sym in symbols) {
if (version < 9 && (sym is GraphicsAreaSymbol || sym is GraphicsLineSymbol))
continue; // graphics objects not supported in OCAD 6-8.
OcadIndex ocadIndex = new OcadIndex();
ocadIndex.Pos = (int) writer.Seek(0, SeekOrigin.Current);
RectangleF bounds = sym.BoundingBox;
ocadIndex.LowerLeft = OcadCoordFromPoint(new PointF(bounds.Left, bounds.Top));
ocadIndex.UpperRight = OcadCoordFromPoint(new PointF(bounds.Right, bounds.Bottom));
ocadIndex.Sym = ConvertSymdefId(sym.Definition.OcadID);
OcadObject ocadObj;
int nItems = WriteSymbol(sym, out ocadObj);
if (version >= 9) {
ocadIndex.ObjType = ocadObj.Otp;
ocadIndex.Status = 1;
ocadIndex.ViewType = 0;
if (version >= 9 && ocadObj.Sym == -2)
ocadIndex.Color = (short) ocadObj.Col; // graphics object.
else if (version >= 9 && ocadObj.Sym == -3)
ocadIndex.Color = 0; // image object.
else
ocadIndex.Color = mapSymdefToSingleColor[sym.Definition];
ocadIndex.ImpLayer = 0;
}
// UNDONE: throw exception if length of object is too long.
if (version == 8)
ocadIndex.Len = (short) nItems;
else if (version >= 9)
ocadIndex.Len = (short) (40 + 8 * nItems);
else
ocadIndex.Len = (short) (32 + 8 * nItems);
currBlock.IndexArr[index] = ocadIndex;
++index; ++count;
if (index == 256 || count == total) {
index = 0;
int current = (int) writer.Seek(0, SeekOrigin.Current);
if (offsetPrevBlock == 0)
firstIndexBlock = current;
else {
writer.Seek(offsetPrevBlock, SeekOrigin.Begin);
writer.Write(current);
writer.Seek(current, SeekOrigin.Begin);
}
currBlock.Write(writer, version);
offsetPrevBlock = current;
// reset for next block.
currBlock.NextBlock = 0;
for (int i = 0; i < currBlock.IndexArr.Length; ++i)
currBlock.IndexArr[i] = new OcadIndex();
}
}
return firstIndexBlock;
}
public void Read(BinaryReader reader, int firstBlock, int version) {
List<OcadIndex> indexList = new List<OcadIndex>();
int nextBlock = firstBlock;
while (nextBlock != 0) {
reader.BaseStream.Seek(nextBlock, SeekOrigin.Begin);
nextBlock = reader.ReadInt32();
for (int i = 0; i < 256; ++i) {
OcadIndex index = new OcadIndex();
index.Read(reader, version);
if (index.Sym != 0)
indexList.Add(index);
}
}
indexes = indexList.ToArray();
}