rasops(9) - NetBSD Manual Pages

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RASOPS(9)              NetBSD Kernel Developer's Manual              RASOPS(9)


NAME
rasops, rasops_init, rasops_reconfig -- raster display operations
SYNOPSIS
#include <dev/wscons/wsdisplayvar.h> #include <dev/rasops/rasops.h> int rasops_init(struct rasops_info *ri, int wantrows, int wantcols); int rasops_reconfig(struct rasops_info *ri, int wantrows, int wantcols); options RASOPS_DEFAULT_WIDTH=80 options RASOPS_DEFAULT_HEIGHT=25
DESCRIPTION
The rasops subsystem is a set of raster operations for wscons(9). The primary data type for using the raster operations is the rasops_info structure in <dev/rasops/rasops.h>. Valid values for the ri_flg member are: RI_FULLCLEAR eraserows() hack to clear full screen RI_FORCEMONO monochrome output even if we can do color RI_BSWAP framebuffer endianness doesn't match CPU RI_CURSOR cursor is switched on RI_CLEAR clear display on startup RI_CENTER center onscreen output RI_CURSORCLIP cursor is currently clipped RI_CFGDONE rasops_reconfig() completed successfully RI_NO_AUTO do not generate box drawing characters for ISO fonts. Use this when it is not safe to allocate memory, for example when setting up an early con- sole. RI_ENABLE_ALPHA the caller supports anti-aliased fonts in the given colour depth. Without this flag rasops_init() will only pick bitmap fonts. RI_8BIT_IS_RGB the caller uses an R3G3B2 colour map in 8 bit. rasops_init() will generate an appropriate ri_devcmap[] but the caller still needs to set up the actual colour map.
FUNCTIONS
rasops_init() initialises a rasops_info descriptor. rasops_reconfig() is used to reconfigure it if parameters have changed in some way. The arguments wantrows and wantcols are the number of rows and columns we'd like. Passing zero for either one of them uses the default -- nor- mally 80 by 25 but it can be changed with config options RASOPS_DEFAULT_WIDTH and RASOPS_DEFAULT_HEIGHT. In terms of optimization, bitmap fonts of width 8 or 16 work the best for all depths. For depths other than 1 the fonts of width 12 are also opti- mized. If calling rasops_reconfig() to change the font and ri_wsfcookie is non- negative, you must call wsfont_unlock() on it, and reset it to -1 or a new, valid cookie.
CODE REFERENCES
The rasops subsystem is implemented within the directory sys/dev/rasops. The rasops module itself is implemented within the file sys/dev/rasops/rasops.c.
SEE ALSO
intro(9), wscons(9), wsdisplay(9), wsfont(9)
HISTORY
The rasops subsystem appeared in NetBSD 1.5.
AUTHORS
The rasops subsystem was written by Andrew Doran <ad@NetBSD.org>. NetBSD 9.99 August 7, 2019 NetBSD 9.99
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