GSD
The GSD binary file format
The file must begin with . This is a header to verify that it is the correct file type.
Header
| 0x00-0x0f | "GRAPHTEC PRT&CUT" |
| 0x10-0x17 | 0x06 00 00 00 01 00 00 00 00 |
| 0x18-0x7f | This entire block is padded with zeros. There may be some other information stored, but in every sample file examined the data is simply 0. |
Body
The body consists of a number of blocks of data. Every block starts with a length chunk indicating how many chunks are contained within that block. For more complex data such as the actual lines, polylines, and pen information chunks may contain entire blocks in a hierarchy.
Chunks
The first two bytes of the chunk provide information on the purpos. The following 2 bytes indicate the type of data and the number of data elements of that type.
While the data typically follows this pattern, in some cases (most notably distance measurements) the "datatype" may indicate a different length than is actually used.
| Header | Description |
|---|---|
| 00 | 1 byte of data stored in length byte |
| 01 | 1-byte little endian 8-bit integer. Typically used for boolean values. |
| 02 | 2-byte little endian 16-bit integer |
| 03 | 4-byte little endian 32-bit integer |
| 04 | 8-byte little endian double precision float. Usually for storing a distance in mm units |
| 05 | ASCII data chunks |
Based on several files generated using version 5.10 of the QuicKutz ROBO Master software, the following information has been deduced. In some cases the data observed in a given chunk is provided where the purpose is unknown.
| Value | Type |
|---|---|
| 0 | line |
| 1 | polyline |
| 4 | elliptical arc |
| 5 | nurb spline |
| 6 | text |
| 7 | rectangle |
| 9 | rounded rectangle |
| Prefix | Suffix | Description | DataType | Data Length |
|---|---|---|---|---|
| 03 | ||||
| 01 | Number of Drawing Objects | |||
| 04 | ||||
| 00 | Drawing Object | |||
| 01 | Drawing Object Type | |||
| 0A | 2D Point | |||
| 0B | Polyline Length | |||
| 0C | Polyline Point | |||
| 14 | Sweep (radians) | |||
| 15 | Ecentricity? | |||
| 16 | (0=Open/1=Closed) | |||
| 40 | Bbox (Upper Left) | |||
| 41 | Bbox (Upper Right) | |||
| 42 | Bbox (Lower Right) | |||
| 43 | Bbox (Lower Left) | |||
| 44 | Rotation | |||
| 05 | ||||
| 21 | Group | |||
| 07 | ||||
| 02 | Number of Line Styles? | 03 | 01 | |
| 05 | Dashed Line Pattern Cut Segment Length | 04 | 01 | |
| 06 | Dashed Line Pattern Spacing Length | 04 | 01 | |
| 08 | ||||
| 01 | Name of cutter? | 05 | var | |
| 02 | Name of cutter? | 05 | var | |
| 04 | Text description of paper type | 05 | var | |
| 05 | Paper size in 0.01mm units (Width, Height) | 03 | 02 | |
| 08 | Cutting Rotation Angle | 02 | 01 | |
| 09 | Offset Enabled | 01 | 01 | |
| 0A | Offset X | 03 | 01 | |
| 0B | Offset Y | 03 | 01 | |
| 0C | Weed Border Enabled | 01 | 01 | |
| 0D | Weed Border Distance | 03 | 01 | |
| 0E | Feed Media Enabled | 01 | 01 | |
| 0F | Feed Media Source (00-Start, 01-End) | 02 | 01 | |
| 10 | Feed Length | 03 | 01 | |
| 11 | Tiling Enabled | 01 | 01 | |
| 14 | Tiling Overlap | 03 | 01 | |
| 1A | Scaling | 02 | 01 | |
| 1C | Tiling Media Width | 03 | 01 | |
| 1D | Tiling Media Height | 03 | 01 | |
| 21 | Print Rotation Angle | 02 | 01 | |
| 22 | Print Cut Lines Enabled | 01 | 01 | |
| 23 | ID for print paper size? | 02 | 01 | |
| 24 | Paper Width in 0.1mm units | 03 | 01 | |
| 25 | Paper Height in 0.1mm units | 03 | 01 | |
| 26 | Paper Orientation (01=Portrait, 02=Landscape) | 02 | 01 | |
| 0A | ||||
| 00 | Page Style? | |||
| 0B | ||||
| 00 | Line Style? | |||
| 0E | ||||
| 00 | Registration Mark Settings | |||
| 01 | Show Registration Marks Enabled | 01 | 01 | |
| 02 | Registration Mode(00=2, 01=3, 02=4) | 02 | 01 | |
| 03 | Registration Pattern(01=Normal, 00=Inward) | 02 | 01 | |
| 0A | Registration Size | |||
| 0B | Registration Thickness | |||
| 0C | Origin X | |||
| 0D | Origin Y | |||
| 0E | Distance (1-2) | |||
| 0F | Distance (2-3) | |||
| 10 | Exceeds Maximum Recommended Length of 31.5" | |||
| 0F | ||||
| 00 | Grid Settings | |||
| 01 | Show Grid | 01 | 01 | |
| 02 | Grid Type (00=Line, 01=Dot) | 02 | 01 | |
| 03 | Grid Spacing | 04 | 01 | |
| 04 | Grid Snap Enabled | 01 | 01 | |
| 10 | ||||
| 00 | End of File |