mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-06-20 16:58:22 +02:00
145 lines
3.6 KiB
ObjectPascal
145 lines
3.6 KiB
ObjectPascal
{$ASMMODE ATT}
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{$MODE FPC}
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uses
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crt,
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go32;
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const
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mouseint = $33;
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var
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mouse_regs : trealregs; external name '___v2prt0_rmcb_regs';
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mouse_seginfo : tseginfo;
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var
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mouse_numbuttons : longint;
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mouse_action : word;
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mouse_x, mouse_y : Word;
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mouse_b : Word;
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userproc_installed : Longbool;
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userproc_length : Longint;
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userproc_proc : pointer;
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procedure callback_handler; assembler;
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asm
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pushw %ds
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pushl %eax
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movw %es, %ax
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movw %ax, %ds
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cmpl $1, USERPROC_INSTALLED
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jne .LNoCallback
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pushal
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movw DOSmemSELECTOR, %ax
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movw %ax, %fs
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call *USERPROC_PROC
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popal
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.LNoCallback:
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popl %eax
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popw %ds
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pushl %eax
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movl (%esi), %eax
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movl %eax, %es: 42(%edi)
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addw $4, %es:46(%edi)
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popl %eax
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iret
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end;
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procedure mouse_dummy; begin end;
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procedure textuserproc;
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begin
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mouse_b := mouse_regs.bx;
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mouse_x := (mouse_regs.cx shr 3) + 1;
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mouse_y := (mouse_regs.dx shr 3) + 1;
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end;
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procedure install_mouse(userproc : pointer; userproclen : longint);
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var r : trealregs;
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begin
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r.eax := $0; realintr(mouseint, r);
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if (r.eax <> $FFFF) then begin
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Writeln('No Microsoft compatible mouse found');
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Writeln('A Microsoft compatible mouse driver is necessary ',
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'to run this example');
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halt;
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end;
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if (r.bx = $ffff) then mouse_numbuttons := 2
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else mouse_numbuttons := r.bx;
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Writeln(mouse_numbuttons, ' button Microsoft compatible mouse ',
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' found.');
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if (userproc <> nil) then begin
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userproc_proc := userproc;
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userproc_installed := true;
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userproc_length := userproclen;
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lock_code(userproc_proc, userproc_length);
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end else begin
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userproc_proc := nil;
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userproc_length := 0;
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userproc_installed := false;
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end;
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lock_data(mouse_x, sizeof(mouse_x));
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lock_data(mouse_y, sizeof(mouse_y));
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lock_data(mouse_b, sizeof(mouse_b));
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lock_data(mouse_action, sizeof(mouse_action));
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lock_data(userproc_installed, sizeof(userproc_installed));
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lock_data(userproc_proc, sizeof(userproc_proc));
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lock_data(mouse_regs, sizeof(mouse_regs));
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lock_data(mouse_seginfo, sizeof(mouse_seginfo));
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lock_code(@callback_handler,
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longint(@mouse_dummy)-longint(@callback_handler));
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get_rm_callback(@callback_handler, mouse_regs, mouse_seginfo);
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r.eax := $0c; r.ecx := $7f;
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r.edx := longint(mouse_seginfo.offset);
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r.es := mouse_seginfo.segment;
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realintr(mouseint, r);
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r.eax := $01;
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realintr(mouseint, r);
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end;
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procedure remove_mouse;
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var
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r : trealregs;
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begin
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r.eax := $02; realintr(mouseint, r);
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r.eax := $0c; r.ecx := 0; r.edx := 0; r.es := 0;
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realintr(mouseint, r);
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free_rm_callback(mouse_seginfo);
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if (userproc_installed) then begin
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unlock_code(userproc_proc, userproc_length);
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userproc_proc := nil;
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userproc_length := 0;
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userproc_installed := false;
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end;
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unlock_data(mouse_x, sizeof(mouse_x));
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unlock_data(mouse_y, sizeof(mouse_y));
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unlock_data(mouse_b, sizeof(mouse_b));
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unlock_data(mouse_action, sizeof(mouse_action));
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unlock_data(userproc_proc, sizeof(userproc_proc));
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unlock_data(userproc_installed, sizeof(userproc_installed));
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unlock_data(mouse_regs, sizeof(mouse_regs));
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unlock_data(mouse_seginfo, sizeof(mouse_seginfo));
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unlock_code(@callback_handler,
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longint(@mouse_dummy)-longint(@callback_handler));
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fillchar(mouse_seginfo, sizeof(mouse_seginfo), 0);
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end;
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begin
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install_mouse(@textuserproc, 400);
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Writeln('Press any key to exit...');
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while (not keypressed) do begin
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gotoxy(1, wherey);
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write('MouseX : ', mouse_x:2, ' MouseY : ', mouse_y:2,
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' Buttons : ', mouse_b:2);
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end;
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remove_mouse;
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end. |