Pen Styles



The Pen Style field of the Pen_Style record (see Record Type 41 (0x29) Pen_Style earlier in this section) contains the style number of the pen style used to render subsequent objects and paths. The table below illustrates the various pen styles and their associated style numbers.



Style # Pen Styles
0 (0x0) 1: 291 (0x123),0
1 (0x1) 1: 218 (0xDA),73 (0x49)
2 (0x2) 1: 145 (0x91),73 (0x49)
3 (0x3) 1: 73 (0x49),73 (0x49)
4 (0x4) 1: 36 (0x24),36 (0x24)
5 (0x5) 1: 18 (0x12),18 (0x12)
6 (0x6) 1: 18 (0x12),55 (0x37)
7 (0x7) 3: 18 (0x12),55 (0x37),18 (0x12),55 (0x37), 18 (0x12),127 (0x7F)
8 (0x8) 1: 164 (0xA4),55 (0x37),18 (0x12),55 (0x37)
9 (0x9) 3: 145 (0x91),36 (0x24),138 (0x8A),36 (0x24), 18 (0x12),36 (0x24)
10 (0xA) 3: 91 (0x5B),55 (0x37),91 (0x5B),55 (0x37), 18 (0x12),55 (0x37)
11 (0xB) 4: 91 (0x5B),36 (0x24),91 (0x5B),36 (0x24), 18 (0x12),36 (0x24),18 (0x12),36 (0x24)
12 (0xC) 2: 182 (0xB6),73 (0x49),73 (0x49),73 (0x49)
13 (0xD) 3: 182 (0xB6),36 (0x24),55 (0x37),36 (0x24), 55 (0x37),36 (0x24)
14 (0xE) 3: 255 (0xFF),73 (0x49),255 (0xFF),73 (0x49), 73 (0x49),73 (0x49)
15 (0xF) 4: 273 (0x111),36 (0x24),273 (0x111),36 (0x24), 55 (0x37),36 (0x24),55 (0x37),36 (0x24)









Pen/Brush Patterns



The Pen Pattern and Brush Pattern fields of the Pen_Pattern and Brush_Pattern records (see Record Type 42 (0x29) Pen_Pattern and Record Type 53 (0x35) Brush_Pattern earlier in this section) contain the pattern numbers of the pen and brush patterns used to render subsequent objects and paths. The following table illustrates the pen/brush patterns and their associated pattern numbers.




















Bitmap Color Formats



Bitmap color formats define the number of bits in the bitmap data stream corresponding to a single pixel and the manner they specify the color of the pixel. The formats illustrated below indicate color-indexed bitmap data. The bitmap data defines an index into a color map (see Default Color Map in WPG Defaults to see the WPG color map defaults). In these formats, the data is packed so a byte represents one or more pixels as shown below. The uppermost bit(s) specify the left-most pixel.

Bits 7 6 5 4 3 2 1 0 Bits 7 6 5 4 3 2 1 0
Format 1 Process 0 - 7 Format 3 Process 0 Process 1
Format 2 P0 P1 P2 P3 Format 4 Process 0
P=Pixel




The remaining formats specify the gray level or color directly.

Format 12 7 6 5 4 3 2 1 0
Gray Scale


Format 5 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Gray Scale


Format 6 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Red Green Blue


Format 7 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Trans Blue Green Red


Format 8 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Blue Green Red


Format 9
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Transparency Blue Green Red


Format 10 63...48 47...32 31...15 15...0
Blue Green Red




Format 11 63...48 47...32 31...15 15...0
Transpar Blue Green Red




Bits 0-7 correspond to the first byte in a byte buffer, bits 8-15 to the second byte, and so on.


Bitmap Data Compression



The Bitmap record contains a data stream that defines bitmap image patterns. The data is in a compressed format that is a form of run length encoding. The encoded data is a series of encoding packets consisting of a one-byte instruction followed by zero or more bytes of data. Encoding packets begin and end on raster boundaries; that is, no run lengths extend across two or more rasters. The eight encoding packet types are defined as follows.



Instruction: NRP
Value: 0ccc cccc
Data Length: n(c+1)
Data: Non-repeating Bitmap Data
Description: Displays a single instance of "n(c+1)" bytes of bitmap data where "n" is the size of the bitmap sample data unit (usually the number of bytes per pixel) and c is the count given in the instruction.










Instruction: REP
Value: 1ccc cccc
Data Length: n
Data: Repeating Bitmap Data
Description: Displays a repeating pattern of bitmap data. The size of the pattern, n, is defined by the Sample Data Size instruction. The number of times this pattern is to be repeated is "c+1" where c is the count given in the instruction.










Instruction: DSZ
Value: 0111 1101
Data Length: 1
Data: Sample Data Size (n <= 8)
Description: Specifies the size of a unit of bitmap sample data. The value of the sample data size is used in decoding the NRP, REP, BLK, and WHT instructions. The sample size must be >= 1 and <= 8.










Instruction: EXT
Value: 1111 1101
Data Length: 1
Data: Count
Description: Extends the current repeating bitmap data pattern (as defined in a preceding REP instruction) "c+1" times. This instruction can only follow a REP or another EXT instruction.










Instruction: XOR
Value: 0111 1110
Data Length: 0
Data:
Description: Indicates that the subsequent compressed data is the result of the XOR of the current and previous rasters. This instruction is used for adjacent rasters with nearly identical data.










Instruction: RST
Value: 1111 1110
Data Length: 1
Data: Count
Description: Repeats the previous raster "c+1" times. This instruction is used for adjacent rasters with identical data.










Instruction: BLK
Value: 0111 1111
Data Length: 1
Data: Count
Description: Repeats a 0x00 value "n(c+1)" times. This instruction is included to support the XOR instruction.










Instruction: WHT
Value: 1111 1111
Data Length: 1
Data: Count
Description: Repeats a 0xFF value "n(c+1)" times. This instruction is included because of the prevalence of the color WHITE, represented by the value 0xFF, in many bitmaps.









Object_Image Formats



The Object_Image record supports the following formats. The supplementary data length value is 0 for all Object_Image formats except the EPS format, which has a data length of 16 bytes (assuming single precision). See Format Type 10 (0xA) following this table for the structure of the EPS supplementary data area.



ID Format Description
0 (0x0) unknown
1 (0x1) WPG10 WordPerfect Graphics 1.0 Format
2 (0x2) WPG20 WordPerfect Graphics 2.x Format
3 (0x3) Reserved
4 (0x4) Reserved
5 (0x5) Reserved
6 (0x6) BMP Microsoft Windows 3.0 Bitmap
7 (0x7) CGM Computer Graphics Metafile
8 (0x8) DHP Dr. Halo PIC Format
9 (0x9) DXF AutoCad Format
10 (0xA) EPS Encapsulated PostScript
11 (0xB) GEM GEM Draw Format
12 (0xC) GIF CompuServe Graphics Interchange Format
13 (0xD) HPGL Hewlett-Packard Graphics Language
14 (0xE) IMG GEM Paint Format
15 (0xF) LL Lasergraphics Language Format
16 (0x10) MSP Microsoft Windows Paint Format
17 (0x11) NTIF NeXT TIFF Format
18 (0x12) OLE Microsoft Windows OLE Format
19 (0x13) PCX PC Paintbrush Format
20 (0x14) PIC Lotus 1-2-3 PIC Format
21 (0x15) PICT Macintosh Quickdraw Picture Format
22 (0x16) PMM Presentation Manager Metafile
23 (0x17) PNTG Macintosh MacPaint Format
24 (0x18) PPIC PC Paint Plus Format
25 (0x19) PS PostScript
26 (0x1A) SCODL Scan Conversion Object Description
27 (0x1B) SRAS Sun Raster Image Format
28 (0x1C) TARGA TrueVision TGA Format
29 (0x1D) TIFF Tagged Image File Format
30 (0x1E) VideoShow General Parametrics Enhanced NAPLPS
31 (0x1F) WMF Microsoft Windows Metafile
32 (0x20) XBMP X Windows Bitmap









Format Type 10 (0xA)

EPS - Encapsulated PostScript

The following defines the structure of the supplementary data area of the Encapsulated PostScript format.

Structure:

{Xll coordinate (lower left coordinate of bounding box)}

{Yll coordinate}

{Xur coordinate (upper right coordinate of bounding box)}

{Yur coordinate}

The field length may be double, based on data precision or Object ID. See Field Precision under Record Structureearlier in this section for more detailed information.