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dxx-rebirth/input/svgalib_key.c
Bradley Bell 82f5791668 svgalib support
2001-01-22 12:51:49 +00:00

369 lines
8.9 KiB
C
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/* SVGALib keyboard input support */
#include <conf.h>
#ifdef SVGALIB_INPUT
#include <stdio.h>
#include <stdlib.h>
#include <vgakeyboard.h>
#include "event.h"
#include "error.h"
#include "key.h"
#include "timer.h"
//added on 9/3/98 by Matt Mueller to free some cpu instead of hogging during menus and such
#include "d_delay.h"
//end this section addition - Matt Mueller
#define KEY_BUFFER_SIZE 16
static unsigned char Installed = 0;
//-------- Variable accessed by outside functions ---------
unsigned char keyd_buffer_type; // 0=No buffer, 1=buffer ASCII, 2=buffer scans
unsigned char keyd_repeat;
unsigned char keyd_editor_mode;
volatile unsigned char keyd_last_pressed;
volatile unsigned char keyd_last_released;
volatile unsigned char keyd_pressed[256];
volatile int keyd_time_when_last_pressed;
typedef struct Key_info {
ubyte state; // state of key 1 == down, 0 == up
ubyte last_state; // previous state of key
int counter; // incremented each time key is down in handler
fix timewentdown; // simple counter incremented each time in interrupt and key is down
fix timehelddown; // counter to tell how long key is down -- gets reset to 0 by key routines
ubyte downcount; // number of key counts key was down
ubyte upcount; // number of times key was released
} Key_info;
typedef struct keyboard {
unsigned short keybuffer[KEY_BUFFER_SIZE];
Key_info keys[256];
fix time_pressed[KEY_BUFFER_SIZE];
unsigned int keyhead, keytail;
} keyboard;
static /*volatile*/ keyboard key_data;
char *key_text[256];
unsigned char ascii_table[128] =
{ 255, 255, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',255,255,
'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']', 255, 255,
'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', 39, '`',
255, '\\', 'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/', 255,'*',
255, ' ', 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,255,255,
255, 255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255 };
unsigned char shifted_ascii_table[128] =
{ 255, 255, '!', '@', '#', '$', '%', '^', '&', '*', '(', ')', '_', '+',255,255,
'Q', 'W', 'E', 'R', 'T', 'Y', 'U', 'I', 'O', 'P', '{', '}', 255, 255,
'A', 'S', 'D', 'F', 'G', 'H', 'J', 'K', 'L', ':', '"', '~',
255, '|', 'Z', 'X', 'C', 'V', 'B', 'N', 'M', '<', '>', '?', 255,255,
255, ' ', 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,255,255,
255, 255, 255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,
255,255,255,255,255,255,255,255 };
//killed on 10/03/98 by Matt Mueller
//unsigned char key_to_ascii(int a)
//{
// if (!isprint(a)) return 255;
// if (a & KEY_SHIFTED) {
// return (toupper((unsigned char) a));
// } else {
// return ((unsigned char) a);
// }
//}
//end kill -MM
//added on 10/03/98 by Matt Mueller to fix shifted keys (copied from dos/key.c)
unsigned char key_to_ascii(int keycode)
{
int shifted;
shifted = keycode & KEY_SHIFTED;
keycode &= 0xFF;
if ( keycode>=127 )
return 255;
if (shifted)
return shifted_ascii_table[keycode];
else
return ascii_table[keycode];
}
//end addition -MM
void key_handler(int scancode, int press)
{
ubyte state, key_state;
int i, keycode, event_key;
Key_info *key;
unsigned char temp;
if (press == KEY_EVENTPRESS)
key_state = 1;
else if (press == KEY_EVENTRELEASE)
key_state = 0;
else
return;
event_key = scancode;
//=====================================================
//Here a translation from win keycodes to mac keycodes!
//=====================================================
for (i = 255; i >= 0; i--) {
keycode = i;
key = &(key_data.keys[keycode]);
if (i == event_key)
state = key_state;
else
state = key->last_state;
if ( key->last_state == state ) {
if (state) {
key->counter++;
keyd_last_pressed = keycode;
keyd_time_when_last_pressed = timer_get_fixed_seconds();
}
} else {
if (state) {
keyd_last_pressed = keycode;
keyd_pressed[keycode] = 1;
key->downcount += state;
key->state = 1;
key->timewentdown = keyd_time_when_last_pressed = timer_get_fixed_seconds();
key->counter++;
} else {
keyd_pressed[keycode] = 0;
keyd_last_released = keycode;
key->upcount += key->state;
key->state = 0;
key->counter = 0;
key->timehelddown += timer_get_fixed_seconds() - key->timewentdown;
}
}
if ( (state && !key->last_state) || (state && key->last_state && (key->counter > 30) && (key->counter & 0x01)) ) {
if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT])
keycode |= KEY_SHIFTED;
if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT])
keycode |= KEY_ALTED;
if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL])
keycode |= KEY_CTRLED;
if ( keyd_pressed[KEY_DELETE] )
keycode |= KEY_DEBUGGED;
temp = key_data.keytail+1;
if ( temp >= KEY_BUFFER_SIZE ) temp=0;
if (temp!=key_data.keyhead) {
key_data.keybuffer[key_data.keytail] = keycode;
key_data.time_pressed[key_data.keytail] = keyd_time_when_last_pressed;
key_data.keytail = temp;
}
}
key->last_state = state;
}
}
void key_close()
{
Installed = 0;
keyboard_close();
}
void key_init()
{
if (keyboard_init())
Error ("SVGAlib Keyboard Init Failed");
Installed=1;
keyboard_seteventhandler (key_handler);
keyd_time_when_last_pressed = timer_get_fixed_seconds();
keyd_buffer_type = 1;
keyd_repeat = 1;
// Clear the keyboard array
key_flush();
atexit(key_close);
}
void key_flush()
{
int i;
fix curtime;
if (!Installed)
key_init();
key_data.keyhead = key_data.keytail = 0;
//Clear the keyboard buffer
for (i=0; i<KEY_BUFFER_SIZE; i++ ) {
key_data.keybuffer[i] = 0;
key_data.time_pressed[i] = 0;
}
//use gettimeofday here:
curtime = timer_get_fixed_seconds();
for (i=0; i<256; i++ ) {
keyd_pressed[i] = 0;
key_data.keys[i].state = 1;
key_data.keys[i].last_state = 0;
key_data.keys[i].timewentdown = curtime;
key_data.keys[i].downcount=0;
key_data.keys[i].upcount=0;
key_data.keys[i].timehelddown = 0;
key_data.keys[i].counter = 0;
}
}
int add_one(int n)
{
n++;
if ( n >= KEY_BUFFER_SIZE ) n=0;
return n;
}
int key_checkch()
{
int is_one_waiting = 0;
event_poll();
if (key_data.keytail!=key_data.keyhead)
is_one_waiting = 1;
return is_one_waiting;
}
int key_inkey()
{
int key = 0;
if (!Installed)
key_init();
event_poll();
if (key_data.keytail!=key_data.keyhead) {
key = key_data.keybuffer[key_data.keyhead];
key_data.keyhead = add_one(key_data.keyhead);
}
//added 9/3/98 by Matt Mueller to free cpu time instead of hogging during menus and such
// else d_delay(1);
//end addition - Matt Mueller
return key;
}
int key_inkey_time(fix * time)
{
int key = 0;
if (!Installed)
key_init();
event_poll();
if (key_data.keytail!=key_data.keyhead) {
key = key_data.keybuffer[key_data.keyhead];
*time = key_data.time_pressed[key_data.keyhead];
key_data.keyhead = add_one(key_data.keyhead);
}
return key;
}
int key_peekkey()
{
int key = 0;
event_poll();
if (key_data.keytail!=key_data.keyhead)
key = key_data.keybuffer[key_data.keyhead];
return key;
}
int key_getch()
{
int dummy=0;
if (!Installed)
return 0;
// return getch();
while (!key_checkch())
dummy++;
return key_inkey();
}
unsigned int key_get_shift_status()
{
unsigned int shift_status = 0;
if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT] )
shift_status |= KEY_SHIFTED;
if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT] )
shift_status |= KEY_ALTED;
if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL] )
shift_status |= KEY_CTRLED;
#ifndef NDEBUG
if (keyd_pressed[KEY_DELETE])
shift_status |=KEY_DEBUGGED;
#endif
return shift_status;
}
// Returns the number of seconds this key has been down since last call.
fix key_down_time(int scancode)
{
fix time_down, time;
event_poll();
if ((scancode<0)|| (scancode>255)) return 0;
if (!keyd_pressed[scancode]) {
time_down = key_data.keys[scancode].timehelddown;
key_data.keys[scancode].timehelddown = 0;
} else {
time = timer_get_fixed_seconds();
time_down = time - key_data.keys[scancode].timewentdown;
key_data.keys[scancode].timewentdown = time;
}
return time_down;
}
unsigned int key_down_count(int scancode)
{
int n;
event_poll();
if ((scancode<0)|| (scancode>255)) return 0;
n = key_data.keys[scancode].downcount;
key_data.keys[scancode].downcount = 0;
return n;
}
unsigned int key_up_count(int scancode)
{
int n;
event_poll();
if ((scancode<0)|| (scancode>255)) return 0;
n = key_data.keys[scancode].upcount;
key_data.keys[scancode].upcount = 0;
return n;
}
#endif /* SVGALIB_INPUT */
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