rayzor: src/mouse.c annotate

rayzor

annotate src/mouse.c @ 0:2a5340a6eee4

rayzor first commit

author	John Tsiombikas <nuclear@member.fsf.org>
date	Sat, 05 Apr 2014 08:46:27 +0300
parents
children	a826bf0fb169

rev	line source
nuclear@0	1 /* TODO: try NOT using the v8086 interrupts to avoid the overhead */
nuclear@0	2 #include "mouse.h"
nuclear@0	3 #include "inttypes.h"
nuclear@0	4 #include "dpmi.h"
nuclear@0	5
nuclear@0	6 #define INTR 0x33
nuclear@0	7
nuclear@0	8 #define QUERY 0
nuclear@0	9 #define SHOW 1
nuclear@0	10 #define HIDE 2
nuclear@0	11 #define READ 3
nuclear@0	12 #define WRITE 4
nuclear@0	13
nuclear@0	14 #define XLIM 7
nuclear@0	15 #define YLIM 8
nuclear@0	16
nuclear@0	17 int have_mouse(void)
nuclear@0	18 {
nuclear@0	19 struct dpmi_real_regs regs;
nuclear@0	20 memset(&regs, 0, sizeof regs);
nuclear@0	21 regs.eax = QUERY;
nuclear@0	22 dpmi_real_int(INTR, &regs);
nuclear@0	23 return regs.eax & 0xffff;
nuclear@0	24 }
nuclear@0	25
nuclear@0	26 void show_mouse(int show)
nuclear@0	27 {
nuclear@0	28 struct dpmi_real_regs regs;
nuclear@0	29 memset(&regs, 0, sizeof regs);
nuclear@0	30 regs.eax = show ? SHOW : HIDE;
nuclear@0	31 dpmi_real_int(INTR, &regs);
nuclear@0	32 }
nuclear@0	33
nuclear@0	34 int read_mouse(int xp, int yp)
nuclear@0	35 {
nuclear@0	36 struct dpmi_real_regs regs;
nuclear@0	37 memset(&regs, 0, sizeof regs);
nuclear@0	38
nuclear@0	39 regs.eax = READ;
nuclear@0	40 dpmi_real_int(INTR, &regs);
nuclear@0	41
nuclear@0	42 if(xp) *xp = regs.ecx & 0xffff;
nuclear@0	43 if(yp) *yp = regs.edx & 0xffff;
nuclear@0	44 return regs.ebx & 0xffff;
nuclear@0	45 }
nuclear@0	46
nuclear@0	47 void set_mouse(int x, int y)
nuclear@0	48 {
nuclear@0	49 struct dpmi_real_regs regs;
nuclear@0	50 memset(&regs, 0, sizeof regs);
nuclear@0	51
nuclear@0	52 regs.eax = WRITE;
nuclear@0	53 regs.ecx = x;
nuclear@0	54 regs.edx = y;
nuclear@0	55 dpmi_real_int(INTR, &regs);
nuclear@0	56 }
nuclear@0	57
nuclear@0	58 void set_mouse_limits(int xmin, int ymin, int xmax, int ymax)
nuclear@0	59 {
nuclear@0	60 struct dpmi_real_regs regs;
nuclear@0	61 memset(&regs, 0, sizeof regs);
nuclear@0	62 regs.eax = XLIM;
nuclear@0	63 regs.ecx = xmin;
nuclear@0	64 regs.edx = xmax;
nuclear@0	65 dpmi_real_int(INTR, &regs);
nuclear@0	66
nuclear@0	67 memset(&regs, 0, sizeof regs);
nuclear@0	68 regs.eax = YLIM;
nuclear@0	69 regs.ecx = ymin;
nuclear@0	70 regs.edx = ymax;
nuclear@0	71 dpmi_real_int(INTR, &regs);
nuclear@0	72 }