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RASOPS(9) NetBSD Kernel Developer's Manual RASOPS(9)
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Maintained for NetBSD
by Kimmo Suominen.
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rasops, rasops_init, rasops_reconfig -- raster display operations
rasops_init(struct rasops_info *ri, int wantrows, int wantcols);
rasops_reconfig(struct rasops_info *ri, int wantrows, int wantcols);
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-
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.
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-
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.
The rasops subsystem is implemented within the directory sys/dev/rasops.
The rasops module itself is implemented within the file
intro(9), wscons(9), wsdisplay(9), wsfont(9)
The rasops subsystem appeared in NetBSD 1.5.
The rasops subsystem was written by Andrew Doran <ad@NetBSD.org>.
NetBSD 9.99 August 7, 2019 NetBSD 9.99