248 lines
7.4 KiB
Groff
248 lines
7.4 KiB
Groff
.\" $NetBSD: wsfont.9,v 1.7 2002/10/14 13:43:38 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 2001 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Gregory McGarry.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the NetBSD
|
|
.\" Foundation, Inc. and its contributors.
|
|
.\" 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
.\" contributors may be used to endorse or promote products derived
|
|
.\" from this software without specific prior written permission.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd October 7, 2001
|
|
.Dt WSFONT 9
|
|
.Os
|
|
.Sh NAME
|
|
.Nm wsfont ,
|
|
.Nm wsfont_init ,
|
|
.Nm wsfont_matches ,
|
|
.Nm wsfont_find ,
|
|
.Nm wsfont_add ,
|
|
.Nm wsfont_remove ,
|
|
.Nm wsfont_enum ,
|
|
.Nm wsfont_lock ,
|
|
.Nm wsfont_unlock ,
|
|
.Nm wsfont_getflg ,
|
|
.Nm wsfont_map_unichar
|
|
.Nd wscons font support
|
|
.Sh SYNOPSIS
|
|
.Fd #include \*[Lt]dev/wscons/wsconsio.h\*[Gt]
|
|
.Fd #include \*[Lt]dev/wsfont/wsfont.h\*[Gt]
|
|
.Ft void
|
|
.Fn wsfont_init "void"
|
|
.Ft int
|
|
.Fn wsfont_matches "struct wsdisplay_font *font" "char *name" \
|
|
"int width" "int height" "int stride"
|
|
.Ft int
|
|
.Fn wsfont_find "char *name" "int width" "int height" "int stride" \
|
|
"int bitorder" "int byteorder"
|
|
.Ft int
|
|
.Fn wsfont_add "struct wsdisplay_font *font" "int copy"
|
|
.Ft int
|
|
.Fn wsfont_remove "int cookie"
|
|
.Ft void
|
|
.Fn wsfont_enum "void (*callback)(char *, int, int, int)"
|
|
.Ft int
|
|
.Fn wsfont_lock "int cookie" "struct wsdisplay_font **ptr"
|
|
.Ft int
|
|
.Fn wsfont_unlock "int cookie"
|
|
.Ft int
|
|
.Fn wsfont_getflg "int cookie" "int *flg" "int *lc"
|
|
.Ft int
|
|
.Fn wsfont_map_unichar "struct wsdisplay_font *font" "int c"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
module is a component of the
|
|
.Xr wscons 9
|
|
framework to provide access to display fonts.
|
|
Fonts may be loaded dynamically into the kernel or included statically
|
|
in the kernel at compile time.
|
|
Display drivers which emulate a glass-tty console on a bit-mapped
|
|
display can add, remove and find fonts for use by device-dependent
|
|
blitter operations.
|
|
.Pp
|
|
The primary data type for manipulating fonts is the
|
|
.Em wsdisplay_font
|
|
structure in
|
|
.Pa dev/wscons/wsconsio.h :
|
|
.Bd -literal
|
|
struct wsdisplay_font {
|
|
char *name; /* font name */
|
|
int firstchar;
|
|
int numchars; /* size of font table */
|
|
int encoding; /* font encoding
|
|
u_int fontwidth; /* character width */
|
|
u_int fontheight; /* character width */
|
|
u_int stride;
|
|
int bitorder;
|
|
int byteorder;
|
|
void *data; /* pointer to font table */
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The maximum font table size is
|
|
.Em WSDISPLAY_MAXFONTSZ .
|
|
.Pp
|
|
The
|
|
.Nm
|
|
framework supports fonts with the following encodings:
|
|
.Bl -tag -width compact
|
|
.It WSDISPLAY_FONTENC_ISO
|
|
ISO-encoded fonts.
|
|
.It WSDISPLAY_FONTENC_IBM
|
|
IBM-encoded fonts commonly available for IBM CGA, EGA and VGA display
|
|
adapters.
|
|
.It WSDISPLAY_FONTENC_PCVT
|
|
PCVT-encoding fonts distributed as part of the old PCVT terminal
|
|
emulation driver.
|
|
.It WSDISPLAY_FONTENC_ISO7
|
|
ISO-encoded Greek fonts.
|
|
.It WSDISPLAY_FONTENC_ISO2
|
|
ISO-encoded East European fonts.
|
|
.El
|
|
.Sh FUNCTIONS
|
|
.Bl -tag -width compact
|
|
.It Fn wsfont_init "void"
|
|
Initialise the font list with the built-in fonts.
|
|
.It Fn wsfont_matches "font" "name" "width" "height" "stride"
|
|
Matches the font
|
|
.Fa font
|
|
with the specifications
|
|
.Fa name ,
|
|
.Fa width ,
|
|
.Fa height
|
|
and
|
|
.Fa stride .
|
|
Return zero if not matched and non-zero if matched.
|
|
.It Fn wsfont_find "name" "width" "height" "stride" "bitorder" "byteorder"
|
|
Find the font called
|
|
.Fa name
|
|
from the fonts loaded into the kernel.
|
|
The font aspect is specified by
|
|
.Fa width ,
|
|
.Fa height ,
|
|
and
|
|
.Fa stride .
|
|
If
|
|
.Fn wsfont_find
|
|
is called with any of the parameters as 0, it indicates that we don't
|
|
care about that aspect of the font.
|
|
If the font is found a (nonnegative-valued) cookie is returned which
|
|
can used with the other functions.
|
|
.Pp
|
|
The
|
|
.Fa bitorder
|
|
and
|
|
.Fa byteorder
|
|
arguments are the bit order and byte order required.
|
|
Valid values are:
|
|
.Bl -tag -width compact
|
|
.It WSDISPLAY_FONTORDER_KNOWN
|
|
The font is in known ordered format and doesn't need converting.
|
|
.It WSDISPLAY_FONTORDER_L2R
|
|
The font is ordered left to right.
|
|
.It WSDISPLAY_FONTORDER_R2L
|
|
The font is ordered right to left.
|
|
.El
|
|
.Pp
|
|
When more flexibility is required,
|
|
.Fn wsfont_enum
|
|
should be used.
|
|
.It Fn wsfont_add "font" "copy"
|
|
Add a font
|
|
.Fa font
|
|
to the font list.
|
|
If the
|
|
.Fa copy
|
|
argument is non-zero, then the font is physically copied, otherwise a
|
|
reference to the original font is made.
|
|
.It Fn wsfont_remove "cookie"
|
|
Remove the font specified by
|
|
.Fa cookie
|
|
from the font list.
|
|
The value of cookie was returned by
|
|
.Fn wsfont_add .
|
|
.It Fn wsfont_enum "callback"
|
|
Enumerate the list of fonts.
|
|
For each font in the font list, the
|
|
.Fa callback
|
|
function argument is called with the arguments specifying the font
|
|
name, width, height and stride.
|
|
.It Fn wsfont_lock "cookie" "ptr"
|
|
Lock access to the font specified by
|
|
.Fa cookie
|
|
so that it cannot be unloaded from the kernel while is being used.
|
|
If the bit or byte order of the font to be locked differs from what
|
|
has been requested with
|
|
.Fn wsfont_find
|
|
then the glyph data will be modified to match.
|
|
At this point it may be necessary for
|
|
.Fn wsfont_lock
|
|
to make a copy of the font data; this action is transparent to the caller.
|
|
A later call to
|
|
.Fn wsfont_unlock
|
|
will free resources used by temporary copies.
|
|
.Pp
|
|
The address of the wsdisplay_font pointer for the specified font is return in
|
|
the
|
|
.Fa ptr
|
|
argument.
|
|
.Pp
|
|
.Fn wsfont_lock
|
|
returns zero on success, or an error code on failure.
|
|
.It Fn wsfont_unlock "cookie"
|
|
Unlock the font specified by
|
|
.Fa cookie .
|
|
Returns zero on succss, or an error code on failure.
|
|
.It Fn wsfont_map_unichar "font" "c"
|
|
Remap the unicode character
|
|
.Fa c
|
|
to glyph for font
|
|
.Fa font .
|
|
Returns the glyph or success or -1 on error.
|
|
.El
|
|
.Sh CODE REFERENCES
|
|
This section describes places within the
|
|
.Nx
|
|
source tree where actual code implementing or utilising the
|
|
machine-independent wsfont subsystem can be found.
|
|
All pathnames are relative to
|
|
.Pa /usr/src .
|
|
.Pp
|
|
The wscons subsystem is implemented within the directory
|
|
.Pa sys/dev/wscons .
|
|
The wsfont subsystem itself is implemented within the file
|
|
.Pa sys/dev/wsfont/wsfont.c .
|
|
.Sh SEE ALSO
|
|
.Xr autoconf 9 ,
|
|
.Xr driver 9 ,
|
|
.Xr intro 9 ,
|
|
.Xr wscons 9 ,
|
|
.Xr wsdisplay 9
|