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Contextdata writer #993

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d80fea9
Add DXF support for BlockReferenceObjectContextData
DomCR Mar 9, 2026
94d71a5
Implement MTextAttributeObjectContextData DXF writing
DomCR Mar 10, 2026
47830e7
Add support for BlockReference context data serialization
DomCR Mar 11, 2026
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25 changes: 19 additions & 6 deletions src/ACadSharp/IO/DWG/DwgStreamWriters/DwgObjectWriter.Objects.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -45,7 +45,6 @@ private bool skipEntry(NonGraphicalObject entry, out bool notify)
case TableStyle:
case ProxyObject:
case BlockRepresentationData:
case BlockReferenceObjectContextData:
case MTextAttributeObjectContextData:
return true;
}
Expand All @@ -70,9 +69,22 @@ private void writeAcdbPlaceHolder(AcdbPlaceHolder acdbPlaceHolder)

private void writeAnnotScaleObjectContextData(AnnotScaleObjectContextData annotScaleObjectContextData)
{
this.writeObjectContextData(annotScaleObjectContextData);

this._writer.HandleReference(DwgReferenceType.HardPointer, annotScaleObjectContextData.Scale);
}

private void writeBlockReferenceObjectContextData(BlockReferenceObjectContextData contextData)
{
this.writeAnnotScaleObjectContextData(contextData);

this._writer.WriteBitDouble(contextData.Rotation);
this._writer.Write3BitDouble(contextData.InsertionPoint);
this._writer.WriteBitDouble(contextData.XScale);
this._writer.WriteBitDouble(contextData.YScale);
this._writer.WriteBitDouble(contextData.ZScale);
}

private void writeBookColor(BookColor color)
{
this._writer.WriteBitShort(0);
Expand Down Expand Up @@ -724,7 +736,9 @@ private void writeMLineStyle(MLineStyle mlineStyle)

private void writeMultiLeaderAnnotContext(MultiLeaderObjectContextData multiLeaderAnnotContext)
{
writeMultiLeaderAnnotContextSubObject(false, multiLeaderAnnotContext);
this.writeAnnotScaleObjectContextData(multiLeaderAnnotContext);

this.writeMultiLeaderAnnotContextSubObject(false, multiLeaderAnnotContext);
}

private void writeMultiLeaderStyle(MultiLeaderStyle mLeaderStyle)
Expand Down Expand Up @@ -863,6 +877,9 @@ private void writeObject(NonGraphicalObject obj)
case BookColor bookColor:
this.writeBookColor(bookColor);
break;
case BlockReferenceObjectContextData blockContextData:
this.writeBlockReferenceObjectContextData(blockContextData);
break;
case CadDictionaryWithDefault dictionarydef:
this.writeCadDictionaryWithDefault(dictionarydef);
break;
Expand Down Expand Up @@ -897,8 +914,6 @@ private void writeObject(NonGraphicalObject obj)
this.writeMultiLeaderStyle(multiLeaderStyle);
break;
case MultiLeaderObjectContextData multiLeaderObjectContextData:
this.writeObjectContextData(multiLeaderObjectContextData);
this.writeAnnotScaleObjectContextData(multiLeaderObjectContextData);
this.writeMultiLeaderAnnotContext(multiLeaderObjectContextData);
break;
case PdfUnderlayDefinition pdfDefinition:
Expand Down Expand Up @@ -939,8 +954,6 @@ private void writeObjectContextData(ObjectContextData objectContextData)
{
//BS 70 Version.
this._writer.WriteBitShort(objectContextData.Version);
//B - Has file to extension dictionary.
this._writer.WriteBit(objectContextData.HasFileToExtensionDictionary);
//B 290 Default flag.
this._writer.WriteBit(objectContextData.Default);
}
Expand Down
56 changes: 49 additions & 7 deletions src/ACadSharp/IO/DXF/DxfStreamWriter/DxfObjectsSectionWriter.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -379,13 +379,19 @@ protected void writeObject<T>(T co)
{
case AcdbPlaceHolder acdbPlaceHolder:
this.writeAcdbPlaceHolder(acdbPlaceHolder);
return;
break;
case BlockReferenceObjectContextData blockContextData:
this.writeBlockReferenceObjectContextData(blockContextData);
break;
case MTextAttributeObjectContextData mtextContextData:
this.writeMTextAttributeObjectContextData(mtextContextData);
break;
case BookColor bookColor:
this.writeBookColor(bookColor);
return;
break;
case CadDictionary cadDictionary:
this.writeDictionary(cadDictionary);
return;
break;
case DictionaryVariable dictvar:
this.writeDictionaryVariable(dictvar);
break;
Expand All @@ -400,10 +406,10 @@ protected void writeObject<T>(T co)
break;
case ImageDefinition imageDefinition:
this.writeImageDefinition(imageDefinition);
return;
break;
case ImageDefinitionReactor reactor:
this.writeImageDefinitionReactor(reactor);
return;
break;
case Layout layout:
this.writeLayout(layout);
break;
Expand Down Expand Up @@ -587,8 +593,6 @@ private bool isObjectSupported(CadObject co)
case TableStyle:
case ProxyObject:
case BlockRepresentationData:
case MTextAttributeObjectContextData:
case BlockReferenceObjectContextData:
this.notify($"Object not implemented : {co.GetType().FullName}", NotificationType.NotImplemented);
return false;
default:
Expand All @@ -600,6 +604,44 @@ private void writeAcdbPlaceHolder(AcdbPlaceHolder acdbPlaceHolder)
{
}

private void writeAnnotScaleObjectContextData(AnnotScaleObjectContextData contextData)
{
this._writer.Write(100, DxfSubclassMarker.AnnotScaleObjectContextData);

this._writer.WriteHandle(340, contextData.Scale);
}

private void writeBlockReferenceObjectContextData(BlockReferenceObjectContextData contextData)
{
DxfClassMap map = DxfClassMap.Create<BlockReferenceObjectContextData>();

this.writeAnnotScaleObjectContextData(contextData);

this._writer.Write(50, contextData.Rotation, map);

this._writer.Write(10, contextData.InsertionPoint, map);

this._writer.Write(41, contextData.XScale, map);
this._writer.Write(42, contextData.YScale, map);
this._writer.Write(43, contextData.ZScale, map);
}

private void writeMTextAttributeObjectContextData(MTextAttributeObjectContextData contextData)
{
DxfClassMap map = DxfClassMap.Create<MTextAttributeObjectContextData>();

this.writeAnnotScaleObjectContextData(contextData);

this._writer.Write(70, contextData.AttachmentPoint, map);

this._writer.Write(50, contextData.Rotation, map);

this._writer.Write(10, contextData.AlignmentPoint, map);
this._writer.Write(11, contextData.InsertPoint, map);

this._writer.Write(290, contextData.Value290, map);
}

private void writeDimensionAssociation(DimensionAssociation dimAssociation)
{
DxfClassMap map = DxfClassMap.Create<DimensionAssociation>();
Expand Down
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