Article: Q39215
Product(s): See article
Version(s): 5.00 5.10
Operating System(s): MS-DOS
Keyword(s): ENDUSER | _getfillmask | mspl13_c
Last Modified: 29-DEC-1988
The _setfillmask function sets a background pattern using repeated
8-by-8 pixel patterns. The mask consists of an 8-byte character array.
The following example illustrates a pixel pattern:
Powers of 2
decimal: 128 64 32 16 08 04 02 01
hex: 80 40 20 10 08 04 02 01
--------------------------------
byte 1 | 1 1 1 1 = 0x66
byte 2 | 1 1 1 1 = 0x66
byte 3 | = 0x00
byte 4 | 1 = 0x08
byte 5 | 1 1 = 0x18
byte 6 | 1 1 = 0x81
byte 7 | 1 1 = 0x42
byte 8 | 1 1 1 1 = 0x3C
The character array for this particular fill mask would be declared in
a C program as follows:
unsigned char *maskarray = "\x66\x66\x00\x08\x18\x81\x42\x3C";
When the fill mask above is used with _setfillmask and a graphics
function such as _rectangle or _ellipse, the pattern will create
a continuous field of faces.