X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fdos%2Fmouse.c;fp=src%2Fdos%2Fmouse.c;h=e2779c985f2d241fe45966f99ce78d20fa58fd97;hp=0000000000000000000000000000000000000000;hb=757e7697c9a4434df6f3fdf3234de504bb4636bc;hpb=ecc362e702b77d5c1334656e6f4dc9b17abcb767

diff --git a/src/dos/mouse.c b/src/dos/mouse.c
new file mode 100644
index 0000000..e2779c9
--- /dev/null
+++ b/src/dos/mouse.c
@@ -0,0 +1,94 @@
+#include "mouse.h"
+
+typedef unsigned short uint16_t;
+
+#define INTR	0x33
+
+#define QUERY	0
+#define SHOW	1
+#define HIDE	2
+#define READ	3
+#define WRITE	4
+#define PIXRATE	0xf
+
+#define XLIM	7
+#define YLIM	8
+
+int have_mouse(void)
+{
+	uint16_t res = 0;
+	_asm {
+		mov eax, QUERY
+		int INTR
+		mov res, ax
+	}
+	return res;
+}
+
+void show_mouse(int show)
+{
+	uint16_t cmd = show ? SHOW : HIDE;
+	_asm {
+		mov ax, cmd
+		int INTR
+	}
+}
+
+int read_mouse(int *xp, int *yp)
+{
+	uint16_t x, y, state;
+	_asm {
+		mov eax, READ
+		int INTR
+		mov state, bx
+		mov x, cx
+		mov y, dx
+	}
+
+	if(xp) *xp = x;
+	if(yp) *yp = y;
+	return state;
+}
+
+void set_mouse(int x, int y)
+{
+	_asm {
+		mov eax, WRITE
+		mov ecx, x
+		mov edx, y
+		int INTR
+	}
+}
+
+void set_mouse_limits(int xmin, int ymin, int xmax, int ymax)
+{
+	_asm {
+		mov eax, XLIM
+		mov ecx, xmin
+		mov edx, xmax
+		int INTR
+		mov eax, YLIM
+		mov ecx, ymin
+		mov edx, ymax
+		int INTR
+	}
+}
+
+void set_mouse_rate(int xrate, int yrate)
+{
+	_asm {
+		mov ax, PIXRATE
+		mov ecx, xrate
+		mov edx, yrate
+		int INTR
+	}
+}
+
+void set_mouse_mode(enum mouse_mode mode)
+{
+	if(mode == MOUSE_GFX) {
+		set_mouse_rate(1, 1);
+	} else {
+		set_mouse_rate(8, 16);
+	}
+}