src/video/ataricommon/SDL_biosevents.c

   1 /*
   2     SDL - Simple DirectMedia Layer
   3     Copyright (C) 1997-2009 Sam Lantinga
   4
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Lesser General Public
   7     License as published by the Free Software Foundation; either
   8     version 2.1 of the License, or (at your option) any later version.
   9
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Lesser General Public License for more details.
  14
  15     You should have received a copy of the GNU Lesser General Public
  16     License along with this library; if not, write to the Free Software
  17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18
  19     Sam Lantinga
  20     slouken@libsdl.org
  21 */
  22 #include "SDL_config.h"
  23
  24 /*
  25  *      Atari keyboard events manager, using BIOS
  26  *
  27  *      Patrice Mandin
  28  */
  29
  30 /* Mint includes */
  31 #include <mint/osbind.h>
  32 #include <mint/cookie.h>
  33
  34 #include "../../events/SDL_sysevents.h"
  35 #include "../../events/SDL_events_c.h"
  36
  37 #include "SDL_atarikeys.h"
  38 #include "SDL_atarievents_c.h"
  39 #include "SDL_xbiosevents_c.h"
  40 #include "SDL_ataridevmouse_c.h"
  41
  42 static unsigned char bios_currentkeyboard[ATARIBIOS_MAXKEYS];
  43 static unsigned char bios_previouskeyboard[ATARIBIOS_MAXKEYS];
  44 static SDL_bool use_dev_mouse = SDL_FALSE;
  45
  46 static void UpdateSpecialKeys(int special_keys_state);
  47
  48 void AtariBios_InitOSKeymap(_THIS)
  49 {
  50         int i, vectors_mask;
  51         unsigned long dummy;
  52
  53         SDL_memset(bios_currentkeyboard, 0, sizeof(bios_currentkeyboard));
  54         SDL_memset(bios_previouskeyboard, 0, sizeof(bios_previouskeyboard));
  55
  56         use_dev_mouse = (SDL_AtariDevMouse_Open()!=0) ? SDL_TRUE : SDL_FALSE;
  57
  58         vectors_mask = ATARI_XBIOS_JOYSTICKEVENTS;      /* XBIOS joystick events */
  59         if (!use_dev_mouse) {
  60                 vectors_mask |= ATARI_XBIOS_MOUSEEVENTS;        /* XBIOS mouse events */
  61         }
  62 /*      if (Getcookie(C_MiNT, &dummy)==C_FOUND) {
  63                 vectors_mask = 0;
  64         }*/
  65
  66         SDL_AtariXbios_InstallVectors(vectors_mask);
  67 }
  68
  69 void AtariBios_PumpEvents(_THIS)
  70 {
  71         int i;
  72         SDL_keysym keysym;
  73
  74         /* Update pressed keys */
  75         SDL_memset(bios_currentkeyboard, 0, ATARIBIOS_MAXKEYS);
  76
  77         while (Bconstat(_CON)) {
  78                 unsigned long key_pressed;
  79                 key_pressed=Bconin(_CON);
  80                 bios_currentkeyboard[(key_pressed>>16)&(ATARIBIOS_MAXKEYS-1)]=0xFF;
  81         }
  82
  83         /* Read special keys */
  84         UpdateSpecialKeys(Kbshift(-1));
  85
  86         /* Now generate events */
  87         for (i=0; i<ATARIBIOS_MAXKEYS; i++) {
  88                 /* Key pressed ? */
  89                 if (bios_currentkeyboard[i] && !bios_previouskeyboard[i])
  90                         SDL_PrivateKeyboard(SDL_PRESSED,
  91                                 SDL_Atari_TranslateKey(i, &keysym, SDL_TRUE));
  92
  93                 /* Key unpressed ? */
  94                 if (bios_previouskeyboard[i] && !bios_currentkeyboard[i])
  95                         SDL_PrivateKeyboard(SDL_RELEASED,
  96                                 SDL_Atari_TranslateKey(i, &keysym, SDL_FALSE));
  97         }
  98
  99         if (use_dev_mouse) {
 100                 SDL_AtariDevMouse_PostMouseEvents(this, SDL_TRUE);
 101         } else {
 102                 SDL_AtariXbios_PostMouseEvents(this, SDL_TRUE);
 103         }
 104
 105         /* Will be previous table */
 106         SDL_memcpy(bios_previouskeyboard, bios_currentkeyboard, sizeof(bios_previouskeyboard));
 107 }
 108
 109 static void UpdateSpecialKeys(int special_keys_state)
 110 {
 111 #define UPDATE_SPECIAL_KEYS(numbit,scancode) \
 112         {       \
 113                 if (special_keys_state & (1<<(numbit))) { \
 114                         bios_currentkeyboard[scancode]=0xFF; \
 115                 }       \
 116         }
 117
 118         UPDATE_SPECIAL_KEYS(K_RSHIFT, SCANCODE_RIGHTSHIFT);
 119         UPDATE_SPECIAL_KEYS(K_LSHIFT, SCANCODE_LEFTSHIFT);
 120         UPDATE_SPECIAL_KEYS(K_CTRL, SCANCODE_LEFTCONTROL);
 121         UPDATE_SPECIAL_KEYS(K_ALT, SCANCODE_LEFTALT);
 122         UPDATE_SPECIAL_KEYS(K_CAPSLOCK, SCANCODE_CAPSLOCK);
 123 }
 124
 125 void AtariBios_ShutdownEvents(void)
 126 {
 127         SDL_AtariXbios_RestoreVectors();
 128         if (use_dev_mouse) {
 129                 SDL_AtariDevMouse_Close();
 130         }
 131 }