private void SaveObjects(BitWriter writer, DwgObjectMap objectMap, int pointerOffset)
{
var writtenHandles = new HashSet <int>();
foreach (var groupObject in TopLevelObjects)
{
groupObject.Write(writer, objectMap, writtenHandles, pointerOffset, FileHeader.Version);
}
}
public void Save(Stream stream)
{
var objectMap = new DwgObjectMap();
AssignHandles(objectMap);
// write the file header; this will be re-written again once the pointers have been calculated
var writer = new BitWriter(stream);
var fileHeaderLocation = writer.Position;
FileHeader.Write(writer);
var variablesStart = writer.Position;
Variables.Write(writer, FileHeader.Version);
FileHeader.HeaderVariablesLocator = DwgFileHeader.DwgSectionLocator.HeaderVariablesLocator(variablesStart - fileHeaderLocation, writer.Position - variablesStart);
var classesStart = writer.Position;
DwgClasses.Write(Classes, writer);
FileHeader.ClassSectionLocator = DwgFileHeader.DwgSectionLocator.ClassSectionLocator(classesStart - fileHeaderLocation, writer.Position - classesStart);
var paddingStart = writer.Position;
writer.WriteBytes(new byte[0x200]); // may contain the MEASUREMENT variable as the first 4 bytes, but not required
FileHeader.UnknownSection_PaddingLocator = DwgFileHeader.DwgSectionLocator.UnknownSection_PaddingLocator(paddingStart - fileHeaderLocation, writer.Position - paddingStart);
var objectDataStart = writer.Position;
SaveObjects(writer, objectMap, objectDataStart);
var objectMapStart = writer.Position;
objectMap.Write(writer);
FileHeader.ObjectMapLocator = DwgFileHeader.DwgSectionLocator.ObjectMapLocator(objectMapStart - fileHeaderLocation, writer.Position - objectMapStart);
var unknownR13C3Start = writer.Position;
DwgUnknownSectionR13C3.Write(writer);
FileHeader.UnknownSection_R13C3AndLaterLocator = DwgFileHeader.DwgSectionLocator.UnknownSection_R13C3AndLaterLocator(unknownR13C3Start - fileHeaderLocation, writer.Position - unknownR13C3Start);
var secondHeaderStart = writer.Position;
FileHeader.WriteSecondHeader(writer, Variables, secondHeaderStart - fileHeaderLocation);
var imageDataStart = writer.Position;
ImageData.Write(writer, imageDataStart - fileHeaderLocation);
FileHeader.ImagePointer = imageDataStart - fileHeaderLocation;
// re-write the file header now that the pointer values have been set
var endPos = writer.Position;
writer.BaseStream.Seek(fileHeaderLocation, SeekOrigin.Begin);
FileHeader.Write(writer);
writer.BaseStream.Seek(endPos, SeekOrigin.Begin);
}
private void AssignHandles(DwgObjectMap objectMap)
{
BlockHeaders.ClearHandles();
Layers.ClearHandles();
Styles.ClearHandles();
LineTypes.ClearHandles();
Views.ClearHandles();
UCSs.ClearHandles();
ViewPorts.ClearHandles();
AppIds.ClearHandles();
DimStyles.ClearHandles();
ViewPortEntityHeaders.ClearHandles();
GroupDictionary.ClearHandles();
MLineStyleDictionary.ClearHandles();
NamedObjectDictionary.ClearHandles();
BlockHeaders.AssignHandles(objectMap);
Layers.AssignHandles(objectMap);
Styles.AssignHandles(objectMap);
LineTypes.AssignHandles(objectMap);
Views.AssignHandles(objectMap);
UCSs.AssignHandles(objectMap);
ViewPorts.AssignHandles(objectMap);
AppIds.AssignHandles(objectMap);
DimStyles.AssignHandles(objectMap);
ViewPortEntityHeaders.AssignHandles(objectMap);
GroupDictionary.AssignHandles(objectMap);
MLineStyleDictionary.AssignHandles(objectMap);
NamedObjectDictionary.AssignHandles(objectMap);
Variables.BlockControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, BlockHeaders.Handle.HandleOrOffset);
Variables.LayerControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, Layers.Handle.HandleOrOffset);
Variables.StyleObjectControlHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, Styles.Handle.HandleOrOffset);
Variables.LineTypeObjectControlHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, LineTypes.Handle.HandleOrOffset);
Variables.ViewControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, Views.Handle.HandleOrOffset);
Variables.UcsControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, UCSs.Handle.HandleOrOffset);
Variables.ViewPortControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, ViewPorts.Handle.HandleOrOffset);
Variables.AppIdControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, AppIds.Handle.HandleOrOffset);
Variables.DimStyleControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, DimStyles.Handle.HandleOrOffset);
Variables.ViewPortEntityHeaderControlObjectHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, ViewPortEntityHeaders.Handle.HandleOrOffset);
Variables.GroupDictionaryHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, GroupDictionary.Handle.HandleOrOffset);
Variables.MLineStyleDictionaryHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, MLineStyleDictionary.Handle.HandleOrOffset);
Variables.NamedObjectsDictionaryHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftPointer, NamedObjectDictionary.Handle.HandleOrOffset);
Variables.PaperSpaceBlockRecordHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, PaperSpaceBlockRecord.Handle.HandleOrOffset);
Variables.ModelSpaceBlockRecordHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, ModelSpaceBlockRecord.Handle.HandleOrOffset);
Variables.ByLayerLineTypeHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, ByLayerLineType.Handle.HandleOrOffset);
Variables.ByBlockLineTypeHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, ByBlockLineType.Handle.HandleOrOffset);
Variables.ContinuousLineTypeHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, ContinuousLineType.Handle.HandleOrOffset);
Variables.CurrentViewPortEntityHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, CurrentViewPort?.Handle.HandleOrOffset ?? 0);
Variables.CurrentLayerHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, CurrentLayer.Handle.HandleOrOffset);
Variables.TextStyleHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, TextStyle.Handle.HandleOrOffset);
Variables.CurrentEntityLineTypeHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, CurrentEntityLineType.Handle.HandleOrOffset);
Variables.DimensionStyleHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, DimensionStyle.Handle.HandleOrOffset);
Variables.CurrentMultiLineStyleHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, CurrentMultiLineStyle.Handle.HandleOrOffset);
Variables.PaperSpaceCurrentUCSHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, PaperSpaceCurrentUCS?.Handle.HandleOrOffset ?? 0);
Variables.CurrentUCSHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, CurrentUCS?.Handle.HandleOrOffset ?? 0);
Variables.DimensionTextStyleHandle = new DwgHandleReference(DwgHandleReferenceCode.SoftOwner, DimensionTextStyle.Handle.HandleOrOffset);
objectMap.SetNextAvailableHandle(Variables);
}
