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.TH keyboard_getstate 3 "29 July 1997" "Svgalib (>= 1.2.11)" "Svgalib User Manual"
.SH NAME
keyboard_getstate \- get a pointer to a buffer holding the state of all keys in raw keyboard mode
.SH SYNOPSIS
.B "#include <vgakeyboard.h>"
.BI "char *keyboard_getstate(void);"
.SH DESCRIPTION
When in raw keyboard mode this routine returns a pointer
.I buffer
to a static buffer. If the value in
.IB buffer [ scancode ]
is
.BR KEY_PRESSED " or " KEY_NOTPRESSED
the key with that
.I scancode
is pressed or not. Actually
.BR KEY_PRESSED " is 1 and " KEY_NOTPRESSED " is 0,"
s.t. you can use constructs like:
.B "if(buffer[SCANCODE_ENTER]) {"
.br
.BR " " "/* do something */"
.br
.B }
This is more efficient than calling
.BR keyboard_keypressed (3)
if you want to check for many different keys.
Please note that keyboard events will only be processed when you occasionally call
.BR keyboard_update "(3) or "
.BR keyboard_waitforupdate (3).
.BR keyboard_translatekeys (3)
allows certain remap operations which make certain keys (digits, enter) which might have
several physical keys show up under the same scancodes.
Here are the supported scancodes. The names of the
.B #defines
originate from the US keyboard layout, for other countries, they'll refer to the key
in the same physical location, but the keycap will have a different inscription. For
the list below, add
.BR SCANCODE_
in front of the names to get the right name for your C source. That means, if it lists
.BR BACKSLASH
below, you shall use
.BR SCANCODE_BACKSLASH
as symbol in your program. In addition to the names below we also have
.BR SCANCODE_0 " - " SCANCODE_9 ", "
.BR SCANCODE_KEYPAD0 " - " SCANCODE_KEYPAD9 ", "
.BR SCANCODE_A " - " SCANCODE_Z ", and "
.BR SCANCODE_F1 " - " SCANCODE_F12 "."
The other key names are
.BR ESCAPE ", "
.BR MINUS ", "
.BR EQUAL ", "
.BR BACKSPACE ", "
.BR TAB ", "
.BR BRACKET_LEFT ", "
.BR BRACKET_RIGHT ", "
.BR ENTER ", "
.BR LEFTCONTROL ", "
.BR SEMICOLON ", "
.BR APOSTROPHE ", "
.BR GRAVE ", "
.BR LEFTSHIFT ", "
.BR BACKSLASH ", "
.BR COMMA ", "
.BR PERIOD ", "
.BR SLASH ", "
.BR RIGHTSHIFT ", "
.BR KEYPADMULTIPLY ", "
.BR LEFTALT ", "
.BR SPACE ", "
.BR CAPSLOCK ", "
.BR NUMLOCK ", "
.BR SCROLLLOCK ", "
.BR CURSORUPLEFT ", "
.BR CURSORUP ", "
.BR CURSORUPRIGHT ", "
.BR KEYPADMINUS ", "
.BR CURSORLEFT ", "
.BR CURSORRIGHT ", "
.BR KEYPADPLUS ", "
.BR CURSORDOWNLEFT ", "
.BR CURSORDOWN ", "
.BR CURSORDOWNRIGHT ", "
.BR KEYPADPERIOD ", "
.BR LESS ", "
.BR KEYPADENTER ", "
.BR RIGHTCONTROL ", "
.BR CONTROL ", "
.BR KEYPADDIVIDE ", "
.BR PRINTSCREEN ", "
.BR RIGHTALT ", "
.BR BREAK ", "
.BR BREAK_ALTERNATIVE ", "
.BR HOME ", "
.BR CURSORBLOCKUP ", "
.BR PAGEUP ", "
.BR CURSORBLOCKLEFT ", "
.BR CURSORBLOCKRIGHT ", "
.BR END ", "
.BR CURSORBLOCKDOWN ", "
.BR PAGEDOWN ", "
.BR INSERT ", and "
.BR REMOVE "."
.SH SEE ALSO
.BR svgalib (7),
.BR vgagl (7),
.BR libvga.config (5),
.BR keytest (6),
.BR eventtest (6),
.BR keyboard_seteventhandler (3),
.BR keyboard_init (3),
.BR keyboard_init_return_fd (3),
.BR keyboard_close (3),
.BR keyboard_setdefaulteventhandler (3),
.BR keyboard_getstate (3),
.BR keyboard_clearstate (3),
.BR keyboard_translatekeys (3),
.BR keyboard_update (3),
.BR keyboard_waitforupdate (3),
.BR vga_waitevent (3)
.SH AUTHOR
This manual page was edited by Michael Weller <eowmob@exp-math.uni-essen.de>. The
exact source of the referenced function as well as of the original documentation is
unknown.
It is very likely that both are at least to some extent are due to
Harm Hanemaayer <H.Hanemaayer@inter.nl.net>.
Occasionally this might be wrong. I hereby
asked to be excused by the original author and will happily accept any additions or corrections
to this first version of the svgalib manual.
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