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greg |
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/* Copyright (c) 1992 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* Microsoft Mouse handling routines |
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*/ |
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#include <stdio.h> |
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#include <dos.h> |
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#include <i86.h> |
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#include <graph.h> |
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#include "driver.h" |
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#define M_RIGHTBUTT 0x8 |
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#define M_LEFTBUTT 0x2 |
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#define M_MOTION 0x1 |
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static int ydispsize; |
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static int crad; |
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#define right_button (mouse_event & M_RIGHTBUTT) |
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#define left_button (mouse_event & M_LEFTBUTT) |
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static int mouse_event = 0; |
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static int mouse_xpos = -1; |
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static int mouse_ypos = -1; |
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#pragma off (check_stack) |
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static void _loadds far mouse_handler (int max, int mcx, int mdx) |
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{ |
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#pragma aux mouse_handler parm [EAX] [ECX] [EDX] |
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mouse_event = max; |
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mouse_xpos = mcx; |
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mouse_ypos = mdx; |
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} |
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#pragma on (check_stack) |
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static void |
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move_cursor(newx, newy) /* move cursor to new position */ |
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int newx, newy; |
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{ |
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extern char *bmalloc(); |
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static char *imp = NULL; |
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static int curx = -1, cury = -1; |
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if (imp == NULL && |
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(imp = bmalloc(_imagesize(0,0,2*crad+1,2*crad+1))) == NULL) { |
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eputs("out of memory in move_cursor"); |
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quit(1); |
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} |
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if (curx >= 0 & cury >= 0) /* clear old cursor */ |
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_putimage(curx-crad, cury-crad, imp, _GPSET); |
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/* record new position */ |
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curx = newx; cury = newy; |
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if (curx < 0 | cury < 0) |
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return; /* no cursor */ |
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/* save under new cursor */ |
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_getimage(newx-crad,newy-crad,newx+crad,newy+crad, imp); |
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/* draw new cursor */ |
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_setcolor(1); |
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_rectangle(_GFILLINTERIOR, newx-crad, newy-1, newx+crad, newy+1); |
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_rectangle(_GFILLINTERIOR, newx-1, newy-crad, newx+1, newy+crad); |
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_setcolor(0); |
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_moveto(newx-crad+1, newy); |
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_lineto(newx+crad-1, newy); |
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_moveto(newx, newy-crad+1); |
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_lineto(newx, newy+crad-1); |
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} |
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static int |
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ms_getcur(xp, yp) /* get mouse cursor position */ |
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int *xp, *yp; |
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{ |
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/* show cursor */ |
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move_cursor(mouse_xpos, mouse_ypos); |
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/* update cursor until button pressed */ |
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do { |
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mouse_event = 0; |
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while( !mouse_event ) |
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if (kbhit()) |
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switch (getch()) { |
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case MB1: |
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mouse_event = M_LEFTBUTT; |
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break; |
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case MB2: |
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case MB3: |
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mouse_event = M_RIGHTBUTT; |
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break; |
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default: |
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mouse_event = M_RIGHTBUTT | M_LEFTBUTT; |
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break; |
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} |
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if (mouse_event & M_MOTION) |
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move_cursor(mouse_xpos, mouse_ypos); |
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} while (!(mouse_event & (M_RIGHTBUTT|M_LEFTBUTT))); |
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/* clear cursor */ |
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move_cursor(-1, -1); |
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/* compute final position */ |
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if (mouse_xpos < 0 | mouse_ypos < 0) |
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return(ABORT); |
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*xp = mouse_xpos; |
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*yp = ydispsize-1 - mouse_ypos; |
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switch (mouse_event) { |
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case M_LEFTBUTT: |
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case M_LEFTBUTT|M_MOTION: |
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return(MB1); |
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case M_RIGHTBUTT: |
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case M_RIGHTBUTT|M_MOTION: |
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return(MB2); |
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} |
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return(ABORT); |
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} |
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void |
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ms_gcinit( dp ) |
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struct driver *dp; |
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{ |
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struct SREGS sregs; |
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union REGS inregs, outregs; |
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int far *ptr; |
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int (far *function_ptr)(); |
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segread(&sregs); |
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/* check for mouse driver */ |
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inregs.w.ax = 0; |
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int386 (0x33, &inregs, &outregs); |
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if( outregs.w.ax != -1 ) { |
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dp->getcur = NULL; |
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return; |
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} |
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/* get relevant parameters */ |
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ydispsize = dp->ysiz; |
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crad = dp->ysiz/40; |
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/* install watcher */ |
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inregs.w.ax = 0xC; |
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inregs.w.cx = M_RIGHTBUTT | M_LEFTBUTT | M_MOTION; |
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function_ptr = mouse_handler; |
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inregs.x.edx = FP_OFF( function_ptr ); |
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sregs.es = FP_SEG( function_ptr ); |
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int386x( 0x33, &inregs, &outregs, &sregs ); |
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dp->getcur = ms_getcur; |
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} |
