From aedc1bd8d39b24c8323d63e09e37f9dfadad9cf9 Mon Sep 17 00:00:00 2001
From: pnv6942az <1296263419@qq.com>
Date: Sun, 3 Jul 2022 18:37:12 +0800
Subject: [PATCH] =?UTF-8?q?=E5=9B=BE=E5=BD=A2=E7=95=8C=E9=9D=A2?=
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---
 init_graphics.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 init_graphics.c

diff --git a/init_graphics.c b/init_graphics.c
new file mode 100644
index 0000000..21f3348
--- /dev/null
+++ b/init_graphics.c
@@ -0,0 +1,105 @@
+#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
+int volatile jumpp;
+struct message *headd;
+static int n=0;
+int sys_get_message()
+{
+   	if(jumpp>0) --jumpp;
+   	return jumpp;
+}
+int sys_init_graphics()
+{
+int i,j,x,y;
+    char *p=0xA0000;
+    if(n==0)
+{
+    outb(0x05,0x3CE);
+    outb(0x40,0x3CF);//
+    outb(0x06,0x3CE);
+    outb(0x05,0x3CF);//
+    outb(0x04,0x3C4);
+    outb(0x08,0x3C5);//
+
+
+    outb(0x01,0x3D4);
+    outb(0x4F,0x3D5);//
+    outb(0x03,0x3D4);
+    outb(0x82,0x3D5);//
+
+    outb(0x07,0x3D4);
+    outb(0x1F,0x3D5);//
+    outb(0x12,0x3D4);
+    outb(0x8F,0x3D5);//
+    outb(0x17,0x3D4);
+    outb(0xA3,0x3D5);//
+
+
+
+    outb(0x14,0x3D4);
+    outb(0x40,0x3D5);//
+    outb(0x13,0x3D4);
+    outb(0x28,0x3D5);//
+
+    outb(0x0C,0x3D4);//
+    outb(0x00,0x3D5);//
+    outb(0x0D,0x3D4);//
+    outb(0x00,0x3D5);//
+    n=1;
+}
+    
+    
+
+    p=memstart;
+    for(i=0;i<memsize;i++) *p++=11;
+
+
+    x=10;
+    y=10;
+    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=7;
+        }
+
+    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;
+}