msdos/int33.c

   1 /*
   2  * DOS interrupt 33h handler
   3  */
   4
   5 #include <stdlib.h>
   6 #include "winuser.h"
   7 #include "miscemu.h"
   8 #include "dosexe.h"
   9 #include "debug.h"
  10
  11 typedef struct {
  12   DWORD x, y, but;
  13   FARPROC16 callback;
  14   WORD callmask;
  15 } MOUSESYSTEM;
  16
  17 /**********************************************************************
  18  *          INT_Int33Handler
  19  *
  20  * Handler for int 33h (MS MOUSE).
  21  */
  22 void WINAPI INT_Int33Handler( CONTEXT *context )
  23 {
  24   MOUSESYSTEM *sys = (MOUSESYSTEM *)DOSVM_GetSystemData(0x33);
  25
  26   switch (AX_reg(context)) {
  27   case 0x00:
  28     TRACE(int,"Reset mouse driver and request status\n");
  29     AX_reg(context) = 0xFFFF; /* installed */
  30     BX_reg(context) = 3;      /* # of buttons */
  31     sys = calloc(1,sizeof(MOUSESYSTEM));
  32     DOSVM_SetSystemData(0x33, sys);
  33     break;
  34   case 0x03:
  35     TRACE(int,"Return mouse position and button status\n");
  36     BX_reg(context) = sys->but;
  37     CX_reg(context) = sys->x;
  38     DX_reg(context) = sys->y;
  39     break;
  40   case 0x0C: /* Define interrupt subroutine */
  41     TRACE(int,"Define mouse interrupt subroutine\n");
  42     sys->callmask = CX_reg(context);
  43     sys->callback = (FARPROC16)PTR_SEG_OFF_TO_SEGPTR(ES_reg(context), DX_reg(context));
  44     break;
  45   default:
  46     INT_BARF(context,0x33);
  47   }
  48 }
  49
  50 typedef struct {
  51   FARPROC16 proc;
  52   WORD mask,but,x,y,mx,my;
  53 } MCALLDATA;
  54
  55 static void MouseRelay(LPDOSTASK lpDosTask,PCONTEXT context,void *mdata)
  56 {
  57   MCALLDATA *data = (MCALLDATA *)mdata;
  58   CONTEXT ctx = *context;
  59
  60   AX_reg(&ctx) = data->mask;
  61   BX_reg(&ctx) = data->but;
  62   CX_reg(&ctx) = data->x;
  63   DX_reg(&ctx) = data->y;
  64   SI_reg(&ctx) = data->mx;
  65   DI_reg(&ctx) = data->my;
  66   CS_reg(&ctx) = SELECTOROF(data->proc);
  67   IP_reg(&ctx) = OFFSETOF(data->proc);
  68   free(data);
  69   DPMI_CallRMProc(&ctx, NULL, 0, 0);
  70 }
  71
  72 void WINAPI INT_Int33Message(UINT message,WPARAM wParam,LPARAM lParam)
  73 {
  74   MOUSESYSTEM *sys = (MOUSESYSTEM *)DOSVM_GetSystemData(0x33);
  75   WORD mask = 0;
  76
  77   if (!sys) return;
  78   sys->x = LOWORD(lParam);
  79   sys->y = HIWORD(lParam);
  80   switch (message) {
  81   case WM_MOUSEMOVE:
  82     mask |= 0x01;
  83     break;
  84   case WM_LBUTTONDOWN:
  85   case WM_LBUTTONDBLCLK:
  86     sys->but |= 0x01;
  87     mask |= 0x02;
  88     break;
  89   case WM_LBUTTONUP:
  90     sys->but &= ~0x01;
  91     mask |= 0x04;
  92     break;
  93   case WM_RBUTTONDOWN:
  94   case WM_RBUTTONDBLCLK:
  95     sys->but |= 0x02;
  96     mask |= 0x08;
  97     break;
  98   case WM_RBUTTONUP:
  99     sys->but &= ~0x02;
 100     mask |= 0x10;
 101     break;
 102   case WM_MBUTTONDOWN:
 103   case WM_MBUTTONDBLCLK:
 104     sys->but |= 0x04;
 105     mask |= 0x20;
 106     break;
 107   case WM_MBUTTONUP:
 108     sys->but &= ~0x04;
 109     mask |= 0x40;
 110     break;
 111   }
 112
 113   if ((mask & sys->callmask) && sys->callback) {
 114     MCALLDATA *data = calloc(1,sizeof(MCALLDATA));
 115     data->proc = sys->callback;
 116     data->mask = mask & sys->callmask;
 117     data->but = sys->but;
 118     data->x = sys->x;
 119     data->y = sys->y;
 120     DOSVM_QueueEvent(-1, DOS_PRIORITY_MOUSE, MouseRelay, data);
 121   }
 122 }