204 lines
6.4 KiB
C
204 lines
6.4 KiB
C
///////////////////////////////////////////////////////////////////////////////
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// Keyboard input
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//
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// Instead of using libfxcg functions which only provide single-key analysis
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// (GetKey, GetKeyWait, and PRGM_GetKey mainly), the following code uses a
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// simple KEYSC driver. This is indirectly taken from gint code.
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///////////////////////////////////////////////////////////////////////////////
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#include "cgdoom.h"
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#include "doomdef.h"
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/* Keyboard matrix codes */
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#define KEYCODE_F1 0x91
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#define KEYCODE_F2 0x92
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#define KEYCODE_F3 0x93
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#define KEYCODE_F4 0x94
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#define KEYCODE_F5 0x95
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#define KEYCODE_F6 0x96
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#define KEYCODE_SHIFT 0x81
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#define KEYCODE_OPTN 0x82
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#define KEYCODE_VARS 0x83
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#define KEYCODE_MENU 0x84
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#define KEYCODE_LEFT 0x85
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#define KEYCODE_UP 0x86
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#define KEYCODE_ALPHA 0x71
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#define KEYCODE_SQUARE 0x72
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#define KEYCODE_POWER 0x73
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#define KEYCODE_EXIT 0x74
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#define KEYCODE_DOWN 0x75
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#define KEYCODE_RIGHT 0x76
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#define KEYCODE_XOT 0x61
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#define KEYCODE_LOG 0x62
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#define KEYCODE_LN 0x63
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#define KEYCODE_SIN 0x64
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#define KEYCODE_COS 0x65
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#define KEYCODE_TAN 0x66
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#define KEYCODE_FRAC 0x51
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#define KEYCODE_FD 0x52
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#define KEYCODE_LEFTP 0x53
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#define KEYCODE_RIGHTP 0x54
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#define KEYCODE_COMMA 0x55
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#define KEYCODE_ARROW 0x56
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#define KEYCODE_7 0x41
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#define KEYCODE_8 0x42
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#define KEYCODE_9 0x43
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#define KEYCODE_DEL 0x44
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#define KEYCODE_4 0x31
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#define KEYCODE_5 0x32
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#define KEYCODE_6 0x33
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#define KEYCODE_MUL 0x34
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#define KEYCODE_DIV 0x35
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#define KEYCODE_1 0x21
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#define KEYCODE_2 0x22
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#define KEYCODE_3 0x23
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#define KEYCODE_PLUS 0x24
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#define KEYCODE_MINUS 0x25
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#define KEYCODE_0 0x11
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#define KEYCODE_DOT 0x12
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#define KEYCODE_EXP 0x13
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#define KEYCODE_NEG 0x14
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#define KEYCODE_EXE 0x15
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#define KEYCODE_ACON 0x07
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/* Copy of the keyboard state, one byte per row */
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typedef uint8_t KeyboardState[12] __attribute__((aligned(2)));
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/* Current keyboard state. */
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static KeyboardState st_prev={0}, st_now={0};
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static void ScanKeyboard(KeyboardState state)
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{
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volatile uint16_t *KEYSC = (void *)0xa44b0000;
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uint16_t *array = (void *)state;
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for(int i = 0; i < 6; i++) array[i] = KEYSC[i];
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}
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static int DoomKeyToKeycode(int key)
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{
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switch(key)
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{
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/* Normal Doom keys */
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case KEY_LEFTARROW: return KEYCODE_LEFT;
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case KEY_RIGHTARROW: return KEYCODE_RIGHT;
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case KEY_UPARROW: return KEYCODE_UP;
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case KEY_DOWNARROW: return KEYCODE_DOWN;
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case ' ': return KEYCODE_SQUARE;
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case KEY_RCTRL: return KEYCODE_ALPHA;
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case '1': return KEYCODE_F1;
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case '2': return KEYCODE_F2;
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case '3': return KEYCODE_F3;
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case '4': return KEYCODE_F4;
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case '5': return KEYCODE_F5;
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case '6': return KEYCODE_F6;
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case '7': return KEYCODE_SHIFT;
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case KEY_TAB: return KEYCODE_EXIT;
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case KEY_PAUSE: return KEYCODE_OPTN;
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case KEY_SLEFTARROW: return KEYCODE_0;
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case KEY_SRIGHTARROW: return KEYCODE_DOT;
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case KEY_ESCAPE: return KEYCODE_MENU;
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case KEY_ENTER: return KEYCODE_EXE;
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/* Special CGDoom keys */
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case SKEY_CHEAT: return KEYCODE_POWER;
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case SKEY_DECVP: return KEYCODE_MINUS;
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case SKEY_INCVP: return KEYCODE_PLUS;
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case SKEY_NOCLIP: return KEYCODE_ARROW;
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case SKEY_GAMMA: return KEYCODE_FRAC;
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case SKEY_FREEMEM: return KEYCODE_FD;
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case SKEY_FPSCOUNTER: return KEYCODE_LEFTP;
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case SKEY_FRAMESKIP: return KEYCODE_VARS;
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case SKEY_PROFILER: return KEYCODE_RIGHTP;
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/* Alphabetic keys */
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case 'A': return KEYCODE_XOT;
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case 'B': return KEYCODE_LOG;
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case 'C': return KEYCODE_LN;
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case 'D': return KEYCODE_SIN;
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case 'E': return KEYCODE_COS;
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case 'F': return KEYCODE_TAN;
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case 'G': return KEYCODE_FRAC;
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case 'H': return KEYCODE_FD;
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case 'I': return KEYCODE_LEFTP;
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case 'J': return KEYCODE_RIGHTP;
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case 'K': return KEYCODE_COMMA;
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case 'L': return KEYCODE_ARROW;
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case 'M': return KEYCODE_7;
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case 'N': return KEYCODE_8;
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case 'O': return KEYCODE_9;
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case 'P': return KEYCODE_4;
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case 'Q': return KEYCODE_5;
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case 'R': return KEYCODE_6;
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case 'S': return KEYCODE_MUL;
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case 'T': return KEYCODE_DIV;
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case 'U': return KEYCODE_1;
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case 'V': return KEYCODE_2;
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case 'W': return KEYCODE_3;
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case 'X': return KEYCODE_PLUS;
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case 'Y': return KEYCODE_MINUS;
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case 'Z': return KEYCODE_0;
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case -' ': return KEYCODE_DOT;
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case KEY_BACKSPACE: return KEYCODE_DEL;
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/* Numeric keys (handled differently, require a modifier) */
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case -'0': return KEYCODE_0;
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case -'1': return KEYCODE_1;
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case -'2': return KEYCODE_2;
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case -'3': return KEYCODE_3;
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case -'4': return KEYCODE_4;
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case -'5': return KEYCODE_5;
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case -'6': return KEYCODE_6;
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case -'7': return KEYCODE_7;
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case -'8': return KEYCODE_8;
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case -'9': return KEYCODE_9;
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default: return -1;
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}
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}
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static int KeycodeDown(KeyboardState state, int code)
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{
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if(code < 0) return 0;
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int row = (code >> 4) ^ 1;
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int col = 0x80 >> (code & 0x7);
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return (state[row] & col) != 0;
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}
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static int KeyDown(KeyboardState state, int key)
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{
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int code = DoomKeyToKeycode(key);
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if(key >= -'9' && key <= -'0')
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return KeycodeDown(state, code) && KeycodeDown(state, KEYCODE_ALPHA);
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else if(code == KEYCODE_ALPHA)
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return KeycodeDown(state, code);
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else
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return KeycodeDown(state, code) && !KeycodeDown(state, KEYCODE_ALPHA);
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}
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void UpdateKeyboardState(void)
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{
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memcpy(st_prev, st_now, sizeof st_now);
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ScanKeyboard(st_now);
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}
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int KeyWasJustPressed(int key)
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{
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return !KeyDown(st_prev, key) && KeyDown(st_now, key);
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}
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int KeyWasJustReleased(int key)
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{
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return KeyDown(st_prev, key) && !KeyDown(st_now, key);
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}
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