#include <linux/kernel.h>
#include<asm/io.h>
#include "linux/tty.h"
#define memstart 0xA0000
#define memsize 64000
#define cursor_side 3
#define width 320
#define height 200
#define barrier_width 10
struct message *headd;
static int ff=0;
int sys_init_graphics()
{
int i,j,x,y;
    char *p=0xA0000;
    if(ff==0)
{
outb(0x05,0x3CE);
    outb(0x40,0x3CF);/* shift256=1*/
    outb(0x06,0x3CE);
    outb(0x05,0x3CF);/*0101 0xA0000*/
    outb(0x04,0x3C4);
    outb(0x08,0x3C5);/*0000 jilian*/


    outb(0x01,0x3D4);
    outb(0x4F,0x3D5);/* end horizontal display=79 ??*/
    outb(0x03,0x3D4);
    outb(0x82,0x3D5);/*display enable skew=0*/

    outb(0x07,0x3D4);
    outb(0x1F,0x3D5);/*vertical display end No8,9 bit=1,0*/
    outb(0x12,0x3D4);
    outb(0x8F,0x3D5);/*vertical display end low 7b =0x8F*/
    outb(0x17,0x3D4);
    outb(0xA3,0x3D5);/*SLDIV=1 ,scanline clock/2*/



    outb(0x14,0x3D4);
    outb(0x40,0x3D5);/*DW=1*/
    outb(0x13,0x3D4);
    outb(0x28,0x3D5);/*Offset=40, 20:become long*/

    outb(0x0C,0x3D4);/**/
    outb(0x00,0x3D5);/**/
    outb(0x0D,0x3D4);/**/
    outb(0x00,0x3D5);/*Start Address=0xA0000*/
ff=1;
}
    
    

    p=memstart;
    for(i=0;i<memsize;i++) *p++=3;
//3-blue 4-red 12-purple

    x=50;
    y=40;
    for(i=x-cursor_side;i<=x+cursor_side;i++)
        for(j=y-cursor_side;j<=y+cursor_side;j++){
            p=(char *) memstart+j*width+i;
            *p=12;
        }

    return 0;
}

int sys_get_message(struct message * msg)
{
    msg=headd;
    if(headd->mid!=1)return 0;
    headd=headd->next;
    return 0;
}

int sys_repaint(int x,int y,int h)
{
	int i,j,w;
	char *p;
	i=x;
	j=y;
	p=0xA0000;
	w=barrier_width;
	if(i+w>=320 || i<20 ) return 0;
	if(i==33 || j==33){
p=0xA0000;
	for(i=0;i<memsize;i++) *p++=3;
	return 0;
	}
	else if(i==44 || j==44 ){
p=0xA0000;
	for(i=0;i<memsize;i++) *p++=4;
	return 0;
	}else{
	for(i=x;i<=x+w;i++){	
		for(j=y;j<=y+h;j++){
			p=0xA0000+j*320+i;
			*p=12;
		}
		}
}
	
return 0;
}