DWF

In This Topic

Full Name	DWF (Design Web Format)
Format ID	IG_FORMAT_DWF = 78
File Extension(s)	.dwf, .w2d, *.w3d
Data Type	Vector/CAD image
Data Encoding	Binary
Color Profile Support	No
Multi-Page Support	Yes
Alpha Channel Support	No
ImageGear 3D Image Support	Yes (read only)
ImageGear Raster to Vector Format Conversion Support	Yes
ImageGear Unicode Text Display Support	Yes

To support the DWF format, attach the ImageGear CAD/Vector DWF Component to Core ImageGear. See Attaching Components.

ImageGear Supported Versions:

Read:
- DWF packages version 6.0...6.21
- DWF streams up to version 0.55
- W2D streams up to version 6.0.1
- W3D streams up to version 13.0.5
Write:
- DWF package version 6.21, with W2D stream version 6.01.

ImageGear Supported Features:

IG_FLTR_DETECTSUPPORT - autodetection
IG_FLTR_PAGEREADSUPPORT - single page file reading
IG_FLTR_MPAGEREADPSUPPORT - multi-page file reading
IG_FLTR_PAGEINSERTSUPPORT - single-page file writing

ImageGear Read Support:

IG_COMPRESSION_NONE - Vector/CAD data

ImageGear Write Support:

IG_COMPRESSION_NONE - Vector/CAD data

ImageGear Filter Control Parameters:

Filter Control Parameter	Type	Default Value	Available Values	Description
IMAGE_FORMAT	AT_INT32	IG_FORMAT_PNG	IG_FORMAT_BMP IG_FORMAT_CAL IG_FORMAT_GIF IG_FORMAT_G4 IG_FORMAT_JPG IG_FORMAT_PCX IG_FORMAT_PCT IG_FORMAT_PNG IG_FORMAT_TGA IG_FORMAT_TIF	Defines the internal format that will be used for saving of raster data inside the DWF file. This only affects saving of raster images to DWF. Allowed values correspond to enumIGSaveFormats constants.
WIDTH	AT_INT32	512	Any positive value	Defines the width of the empty DIB associated with the image after loading. DIB height is calculated using the file's scale factors. See Working with Vector Images.

Comments:

DWF is an open file format developed by AutoDesk for storing DWG files on the Internet. DWF contains a vector based description of drawings and illustrations. The format supports 2D and 3D drawings. Unlike DWG and DXF, DWF is focused on viewing only. It is intended to be used for publishing 2D and 3D CAD drawings so they can be easily viewed without requiring the use of CAD software.

The format may also contain an encapsulated raster image, in one of the following formats: BMP, CAL, GIF, CCITT Group4, JPEG, PCX, PCT, PNG, TGA, TIFF.

DWF Features Supported for Reading

ImageGear uses DWFToolkit for reading DWF file contents. The following tables use DWFToolkit terms to list DWF features supported by ImageGear:

2D Features

DWF Toolkit Object	Supported Attributes	Imported into ImageGear as:
WT_Polygon	Vertices	IG_VECT_ENT_POLYLINE entity.
WT_Polyline	Vertices	IG_VECT_ENT_POLYLINE entity.
WT_Color	RGBA color	Current color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object.
WT_Background	RGBA color	Background color for HIG_VECT_VIEW object.
WT_Text	Text string Bounds Position	IG_VECT_ENT_TEXT entity.
WT_Text_HAlign	Horizontal alignment	Horizontal alignment for IG_VECT_ENT_TEXT entity.
WT_Text_VAlign	Vertical alignment	Vertical alignment for IG_VECT_ENT_TEXT entity.
WT_Font	Font name Font height Font rotation Font spacing Font width scale Font is bold flag Font is italic flag Font is underlined flag	Used for creating HIG_VECT_FONT object.
WT_Line_Weight	Weight	Used as a thickness when creating IG_VECT_ENT_ATTR_THICKNESS attribute.
WT_Fill	Fill mode	Used internally to turn filling mode on/off.
WT_Filled_Ellipse	Start angle End angle Rotation Major axe Minor axe Center X position Center Y position	Either IG_VECT_ENT_ELLIPSE or IG_VECT_ENT_ARC entity.
WT_Outline_Ellipse	Start angle End angle Rotation Major axe Minor axe Center X position Center Y position	Either IG_VECT_ENT_ELLIPSE or IG_VECT_ENT_ARC entity.
WT_Polytriangle	Vertices	IG_VECT_ENT_GEOMETRY entity.
WT_Visibility	Visibility	Affects the visibility of entities.

3D Features

DWF Toolkit Object	Supported Attributes	Imported into ImageGear as:
Color	Diffuse color	Color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object.
Color_RGB	RGB value	Color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object.
Color_By_Value	Value	Color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object. Color value is converted into RGB.
Color_By_Index	Index	Color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object. Color value is converted into RGB.
Color_By_Index_16	Index	Color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object. Color value is converted into RGB.
Color_By_FIndex	Index	Color for creating IG_VECT_ENT_ATTR_DRAWCOLOR, IG_VECT_ENT_ATTR_FILLCOLOR attributes and a color of HIG_VECT_TEXTOBJ object. Color value is converted into RGB.
Color_Map	Color values	Used to get an actual color value by index.
View	Target Position Up vector	Transformation matrix of HIG_VECT_VIEW object.
Modelling_Matrix	4x4 matrix	Transformation for entities.
Open_Segment	Segment name	IG_VECT_ENT_BLOCK and IG_VECT_ENT_INSERT entities. IG_VECT_ENT_INSERT references IG_VECT_ENT_BLOCK. The block is set as current.
Close_Segment		Restores previous current block.
Include_Segment	Segment name	IG_VECT_ENT_INSERT entity that references the existing block.
Visibility	Visibility	Affects the visibility of entities.
Text_Alignment	Alignment	Specifies an alignment for IG_VECT_ENT_TEXT entity.
Text_Font	Mask Name Size Width factor Width scale Extra space Rotation	Used for creating HIG_VECT_FONT object and for some settings of IG_VECT_ENT_TEXT entity.
Circle	Start point Middle point End point Center	IG_VECT_ENT_ELLIPSE entity.
Circular_Arc	Start point Middle point End point Center	IG_VECT_ENT_ELLIPSE or IG_VECT_ENT_ARC entity.
Circular_Hord	Start point Middle point End point Center	IG_VECT_ENT_ELLIPSE or IG_VECT_ENT_ARC entity.
Circular_Wedge	Start point Middle point End point Center	IG_VECT_ENT_ELLIPSE or IG_VECT_ENT_ARC entity.
Ellipse	Major Minor Center	IG_VECT_ENT_ELLIPSE entity.
Elliptical_Arc	Major Minor Center Limits (Angles)	IG_VECT_ENT_ARC entity.
Line	Points	IG_VECT_ENT_EASYLINE entity.
Polygon	Points	IG_VECT_ENT_POLYLINE entity.
Polyline	Points	IG_VECT_ENT_POLYLINE entity.

ImageGear Vector Entities Supported for Writing to DWF Format

All vector data is saved as 2D stream. 3D coordinates are projected to 2D surface during saving, according to the active view transformation.

ImageGear Entity or Object	Saved as DWF Element
IG_VECT_ENT_EASYLINE IG_VECT_ENT_POLYLINE IG_VECT_ENT_POLYLINEEX IG_VECT_ENT_ARC IG_VECT_ENT_ELLIPSE IG_VECT_ENT_NURBS_CURVE IG_VECT_ENT_BEZIER_CURVE	Vector Cache data is written as either WT_Polygon or WT_Polyline, depending on draw and fill attributes.
IG_VECT_ENT_NURBS_SURFACE	Mesh object of the NURBS surface is saved as several WT_Polyline objects.
IG_VECT_ENT_BEZIER_SURFACE	Mesh object of the Bezier surface is saved as several WT_Polyline objects.
IG_VECT_ENT_BLOCK	All entities in the block container are saved taking into account the block transformation.
IG_VECT_ENT_TEXT	WT_Text objects. WT_Font objects are created if necessary.
IG_VECT_ENT_INSERTION	All entities in the reverenced block container are saved taking into account the insertion and block transformation.
IG_VECT_ENT_VIEWPORT	Viewport content is saved taking into account the viewport scaling and transformation.
IG_VECT_ENT_FIGURE	Vector Cache data is written as WT_Polygon. Every internal entity of the figure is also saved as WT_Polyline.
IG_VECT_ENT_EASY_SURFACE	Mesh object of the surface is saved as several WT_Polyline objects.
IG_VECT_ENT_SHELL	Faces of the shell are saved as WT_Polyline objects.
IG_VECT_ENT_SOLID	Either WT_Polygon or WT_Polyline, depending on draw and fill attributes.
IG_VECT_ENT_GEOMETRY	WT_Polytriangle object.

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