msdos/int33.c

   1 /*
   2  * DOS interrupt 33h handler
   3  */
   4
   5 #include <stdlib.h>
   6 #include "windef.h"
   7 #include "wingdi.h"
   8 #include "winuser.h"
   9 #include "miscemu.h"
  10 #include "dosexe.h"
  11 #include "debugtools.h"
  12
  13 DEFAULT_DEBUG_CHANNEL(int)
  14
  15 typedef struct {
  16   DWORD x, y, but;
  17   FARPROC16 callback;
  18   WORD callmask;
  19 } MOUSESYSTEM;
  20
  21 /**********************************************************************
  22  *          INT_Int33Handler
  23  *
  24  * Handler for int 33h (MS MOUSE).
  25  */
  26 void WINAPI INT_Int33Handler( CONTEXT86 *context )
  27 {
  28   MOUSESYSTEM *sys = (MOUSESYSTEM *)DOSVM_GetSystemData(0x33);
  29
  30   switch (AX_reg(context)) {
  31   case 0x00:
  32     TRACE("Reset mouse driver and request status\n");
  33     AX_reg(context) = 0xFFFF; /* installed */
  34     BX_reg(context) = 3;      /* # of buttons */
  35     sys = calloc(1,sizeof(MOUSESYSTEM));
  36     DOSVM_SetSystemData(0x33, sys);
  37     break;
  38   case 0x03:
  39     TRACE("Return mouse position and button status\n");
  40     BX_reg(context) = sys->but;
  41     CX_reg(context) = sys->x;
  42     DX_reg(context) = sys->y;
  43     break;
  44   case 0x0C: /* Define interrupt subroutine */
  45     TRACE("Define mouse interrupt subroutine\n");
  46     sys->callmask = CX_reg(context);
  47     sys->callback = (FARPROC16)PTR_SEG_OFF_TO_SEGPTR(ES_reg(context), DX_reg(context));
  48     break;
  49   default:
  50     INT_BARF(context,0x33);
  51   }
  52 }
  53
  54 typedef struct {
  55   FARPROC16 proc;
  56   WORD mask,but,x,y,mx,my;
  57 } MCALLDATA;
  58
  59 static void MouseRelay(LPDOSTASK lpDosTask,CONTEXT86 *context,void *mdata)
  60 {
  61   MCALLDATA *data = (MCALLDATA *)mdata;
  62   CONTEXT86 ctx = *context;
  63
  64   EAX_reg(&ctx) = data->mask;
  65   EBX_reg(&ctx) = data->but;
  66   ECX_reg(&ctx) = data->x;
  67   EDX_reg(&ctx) = data->y;
  68   ESI_reg(&ctx) = data->mx;
  69   EDI_reg(&ctx) = data->my;
  70   CS_reg(&ctx)  = SELECTOROF(data->proc);
  71   EIP_reg(&ctx) = OFFSETOF(data->proc);
  72   free(data);
  73   DPMI_CallRMProc(&ctx, NULL, 0, 0);
  74 }
  75
  76 void WINAPI INT_Int33Message(UINT message,WPARAM wParam,LPARAM lParam)
  77 {
  78   MOUSESYSTEM *sys = (MOUSESYSTEM *)DOSVM_GetSystemData(0x33);
  79   WORD mask = 0;
  80
  81   if (!sys) return;
  82   sys->x = LOWORD(lParam);
  83   sys->y = HIWORD(lParam);
  84   switch (message) {
  85   case WM_MOUSEMOVE:
  86     mask |= 0x01;
  87     break;
  88   case WM_LBUTTONDOWN:
  89   case WM_LBUTTONDBLCLK:
  90     sys->but |= 0x01;
  91     mask |= 0x02;
  92     break;
  93   case WM_LBUTTONUP:
  94     sys->but &= ~0x01;
  95     mask |= 0x04;
  96     break;
  97   case WM_RBUTTONDOWN:
  98   case WM_RBUTTONDBLCLK:
  99     sys->but |= 0x02;
 100     mask |= 0x08;
 101     break;
 102   case WM_RBUTTONUP:
 103     sys->but &= ~0x02;
 104     mask |= 0x10;
 105     break;
 106   case WM_MBUTTONDOWN:
 107   case WM_MBUTTONDBLCLK:
 108     sys->but |= 0x04;
 109     mask |= 0x20;
 110     break;
 111   case WM_MBUTTONUP:
 112     sys->but &= ~0x04;
 113     mask |= 0x40;
 114     break;
 115   }
 116
 117   if ((mask & sys->callmask) && sys->callback) {
 118     MCALLDATA *data = calloc(1,sizeof(MCALLDATA));
 119     data->proc = sys->callback;
 120     data->mask = mask & sys->callmask;
 121     data->but = sys->but;
 122     data->x = sys->x;
 123     data->y = sys->y;
 124     DOSVM_QueueEvent(-1, DOS_PRIORITY_MOUSE, MouseRelay, data);
 125   }
 126 }