DWG

Full Name	DWG (AutoDesk AutoCAD)
Format ID	ImGearFormats.DWG
File Extension(s)	*.dwg
Data Type	Vector/CAD image
Data Encoding	Binary
Multi-Page Support	No
Alpha Channel Support	No
Metadata Update Support	No
ImageGear Platforms Support	Win32, Win64, .NET, .NET64

DWG format requires ImageGear.Vector Namespace.

ImageGear Supported Versions

Read: AC1002, AC1003 AC1004, AC1006, AC1009, AC1012, AC1013, AC1014, AC1015, AC1018, AC1021, AC1024, AC1027
Write: AC1012, AC1013, AC1014, AC1015, AC1018, AC1021, AC1024, AC1027

ImageGear Supported Features

IGFilterFormatFlags.DETECTSUPPORT - autodetection
IGFilterFormatFlags.PAGEREADSUPPORT - single page file reading
IGFilterFormatFlags.PAGEINSERTSUPPORT - single-page file writing

ImageGear Read Support

ImGearCompressions.NONE - Vector/CAD data

ImageGear Write Support

ImGearCompressions.NONE - Vector/CAD data

ImageGear Filter Control Parameters

Filter Control Parameter	Type	Default Value	Available Values	Description
BackColor	Long	0	Any positive value	This parameter is used to set background color. If nBackGroundColor=0, then a black background color is set, otherwise a white background color is set.
Width	Long	512	Any positive value	Defines the DIB width of the loaded image. The DIB height is calculated using the file's scale factors.
FontPath	String	""	Any string up to 262 characters	Defines a path to the vector font files. Format - <Path1>;< Path2>;... .
Password	String	""	Any string up to 262 characters	Used to set password for encrypted files before reading.
Version	String	ACAD2004	ACAD12 ACAD13 ACAD14 ACAD2000 ACAD2004 ACAD2007 ACAD2010 ACAD2013	Used to specify version to save the file as.
ShowHidden	Boolean	False	True, False	If true, hidden layers are shown by default.

Comments

DWG, short for "DraWinG", is a CAD file format which serves as the native file format for drawings created in AutoCAD.

DWG/DXF Elements Supported for Reading

CAD Element	Supported Attributes	Imported into ImageGear as:
VIEWPORT	Center point Width Height View target View direction Frozen layers Non-rectangle clipping	ImGearVectEntities.VIEWPORT entity.
LINE	Start point End point Draw color Line type Line weight	ImGearVectEntities.EASYLINE entity.
2D Simple polyline	Vertices Draw color Line type Start width	ImGearVectEntities.POLYLINE entity.
2D Quadratic spline	Vertices Draw color Line type Start width	ImGearVectEntities.BEZIER_CURVE entity, interpolated as Bezier with degree=2.
2D Cubic spline	Vertices Draw color Line type Start width	ImGearVectEntities.BEZIER_CURVE entity, interpolated as Bezier with degree=3.
2D Fit polyline	Vertices Draw color Line type Start width	ImGearVectEntities.BEZIER_CURVE entity, interpolated as cubic B-spline.
3D Simple polyline	Vertices Draw color Line type Line weight	ImGearVectEntities.POLYLINE entity.
3D Quadratic spline	Vertices Draw color Line type Line weight	ImGearVectEntities.BEZIER_CURVE entity, interpolated as Bezier with degree=2.
3D Cubic spline	Vertices Draw color Line type Line weight	ImGearVectEntities.BEZIER_CURVE entity, interpolated as Bezier with degree=3.
Polyface mesh (if contains faces)	Draw color Line type Fill color Fill type	ImGearVectEntities.SHELL entity. The entity contains the result of breaking the polyface into simple objects such as vertices, edges, faces, etc.
Polyface mesh (if does not contain faces)	Draw color Line type Line weight Hidden vertices	ImGearVectEntities.POLYLINE entity.
Block reference	Scale Position Orientation Draw color Fill color Line type Fill type	ImGearVectEntities.INSERTION entity.
Spline	Knots Vertices (weights are supported) Draw color Line type	ImGearVectEntities.NURBS_CURVE entity.
Ellipse	Orientation Major axe Ratio Start angle End angle Center Draw color Line type Line weight	ImGearVectEntities.ARC entity.
Solid	Points [0…3] Draw color Line type Fill color Fill type Thickness	ImGearVectEntities.SOLID entity.
Trace	Points [0…3] Draw color Line type Fill color Fill type Thickness	ImGearVectEntities.SOLID entity.
3D solid	Draw color Line type Fill color Fill type	ImGearVectEntities.SHELL entity. The entity contains the result of breaking the polyface into simple objects such as vertices, edges, faces, etc.
Polyline (don’t confuse with 2D polyline and 3D polyline)	Vertices (Bulge attribute is supported) Draw color Line type Constant width	ImGearVectEntities.POLYLINE entity.
Hatch	Draw color Line type Fill color Fill type Gradient filling Hatch lines	ImGearVectEntities.FIGURE entity.
Circle	Orientation Center Radius Draw color Line type Line weight	ImGearVectEntities.ELLIPSE entity.
Region	Draw color Line type Fill color Fill type	ImGearVectEntities.SHELL entity. The entity contains the result of breaking the polyface into simple objects such as vertices, edges, faces, etc.
MText	Orientation Text color Location Font Font height Font width factor Underlined flag	ImGearVectEntities.BLOCK entity with several ImGearVectEntities.TEXT entities and ImGearVectEntities.INSERT that references this block.
Text	Orientation Font Italic Weight Font height Font width factor Text color Underlined flag Alignment Position Alignment point	ImGearVectEntities.TEXT entity.
Attribute	Orientation Font Italic Weight Font height Font width factor Text color Underlined flag Alignment Position Alignment point	ImGearVectEntities.TEXT entity.
Attribute definition	Orientation Font Italic Weight Font height Font width factor Text color Underlined flag Alignment Position Alignment point	ImGearVectEntities.TEXT entity.
Raster image	Units File name Image size Image scale Clip boundary	ImGearVectEntities.RASTER entity.
Face	Vertices Draw color Line type	ImGearVectEntities.POLYLINE entity.
Arc	Orientation Center Start angle End angle Radius Draw color Line type Thickness	ImGearVectEntities.ARC entity.
Dimension	Block position Draw color Line type Fill color Fill type	ImGearVectEntities.INSERTION entity that references the existing block.
Leader	Arrow head Vertices Scale Arrow head size Reference box Fill color Fill type Draw color Line type	ImGearVectEntities.INSERTION and ImGearVectEntities.BLOCK with ImGearVectEntities.POLYLINE and ImGearVectEntities.SOLID entities inside it.
Tolerance	Location Text Size of the text Draw color Line type Fill color Different shape attributes of included entities	ImGearVectEntities.INSERTION and ImGearVectEntities.BLOCK with several entities inside it, such as ImGearVectEntities.TEXT, ImGearVectEntities.ELLIPSE, and so on.
Block table record	Draw color Line type Fill color Fill type	ImGearVectEntities.BLOCK entity.
Viewport table record (don’t confuse with VIEWPORT entity)	View name View content as a block Direction Target point Twist (angle) Clip distance Background color	ImGearVectorView object.

ImageGear Vector Entities Supported for Writing to DWG and DXF Formats

ImageGear Entity or Object	Saved as DWG/DXF Element
ImGearVectEntities.BLOCK	Block table record.
ImGearVectEntities.INSERTION	Block reference.
ImGearVectEntities.EASYLINE	Line.
ImGearVectEntities.POLYLINE	Depending on fill type and vertex count: Polyline Face 3D Polyline Hatch Hatch is created if non-zero fill type object is attached to the polyline and its type is one of the following: ImGearVectFillPattern.SOLID ImGearVectFillPattern.HATCH_BDIAGONAL ImGearVectFillPattern.HATCH_CROSS ImGearVectFillPattern.HATCH_DIAGCROSS ImGearVectFillPattern.HATCH_FDIAGONAL ImGearVectFillPattern.HATCH_HORIZONTAL ImGearVectFillPattern.HATCH_VERTICAL ImGearVectFillPattern.GRADIENT
ImGearVectEntities.POLYLINEEX	3D polyline for every contour. If non-zero fill type object is attached to the polyline, then a Hatch is created as well.
ImGearVectEntities.ELLIPSE	If the entity contains a draw color attribute, then Ellipse object is created. If the entity references a fill type, then Hatch object is created.
ImGearVectEntities.ARC	If draw color is attached to the entity, then Ellipse object is created. If non-zero fill type object is attached to the entity, then Hatch object is created.
ImGearVectEntities.TEXT	Several Text objects.
ImGearVectEntities.BEZIER_CURVE	If curve flag is set to ImGearVectNURBSFlags.MFIT, then 2D Fit polyline; If Bezier degree is 2, then 3D Quadratic spline; If Bezier degree is 3, then 3D Cubic spline.
ImGearVectEntities.NURBS_CURVE	Spline.
ImGearVectEntities.EASY_SURFACE	Polygon mesh.
ImGearVectEntities.FIGURE	If the entity references a fill type, then hatch object is created. If the entity references a line type, then internal entities are saved as Polyline objects using entity data cache.
ImGearVectEntities.RASTER	Raster image (saved to a separate raster file and referenced from the DWG/DXF file). Filename must be specified for the raster entity.
ImGearVectEntities.VIEWPORT	Viewport (don’t confuse with Viewport table record).
ImGearVectEntities.SHELL	If the entity contains only triangles and quadrilaterals then it is saved as polyface mesh. Otherwise, the entity is saved as line segments or region.
ImGearVectEntities.SOLID	Solid.
ImGearVectEntities.GEOMETRY	If Fill type exists, then region; otherwise line segments.
ImGearVectorView	Viewport table record.