From 7613ba9de2a09e8b8396aa6a6edaf58a4740e1ad Mon Sep 17 00:00:00 2001
From: Garritt McCune <glmccune@gmail.com>
Date: Fri, 22 May 2020 16:30:00 -0500
Subject: [PATCH] Implemented a simple draw_rect function into the video
 driver.

---
 build_numbers.c |  2 +-
 kernel/kmain.c  |  9 +++++++++
 kernel/screen.c | 14 ++++++++++++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/build_numbers.c b/build_numbers.c
index a03c2d0..8382ced 100644
--- a/build_numbers.c
+++ b/build_numbers.c
@@ -1,3 +1,3 @@
 #ifndef KERNEL_VERSION_NUMBER
-#define KERNEL_VERSION_NUMBER "0.0.1-239"
+#define KERNEL_VERSION_NUMBER "0.0.1-276"
 #endif
diff --git a/kernel/kmain.c b/kernel/kmain.c
index 954cd4f..c1a5654 100644
--- a/kernel/kmain.c
+++ b/kernel/kmain.c
@@ -5,6 +5,15 @@ void kmain()
 {
 	clear_screen();
 	print_banner();
+	//draw_rect(20, 5, 50, 7, 0x4, 0xF);
+	draw_rect(0, 5, 5, 13, 0xF, 0x4);
+	draw_rect(5, 8, 10, 10, 0x4, 0xF);
+	draw_rect(10, 5, 15, 13, 0x8, 0x6);
+	draw_rect(20, 5, 25, 7, 0xF, 0x1);
+	draw_rect(20, 8, 25, 13, 0x5, 0x3);
+	//draw_rect(20, 5, 50, 7, 0x4, 0xF);
+	//draw_rect(20, 5, 50, 7, 0x4, 0xF);
+	//draw_rect(20, 5, 50, 7, 0x4, 0xF);
 	//draw_s("Hello, World!", 2, 9);
 	//row = 2;
 	///column = 80;
diff --git a/kernel/screen.c b/kernel/screen.c
index 1a7079d..1511193 100644
--- a/kernel/screen.c
+++ b/kernel/screen.c
@@ -45,6 +45,20 @@ void print_banner(){
 		}
 	}
 }
+//index = (y_value * width_of_screen) + x_value;
+void draw_rect(int start_x, int start_y, int end_x, int end_y, unsigned char fg, unsigned char bg){
+	unsigned char y = end_y - start_y;
+	unsigned char x = end_x - start_x;
+	int attr =  ((bg << 4) | (fg & 0x0F));
+	unsigned short *buffer = (unsigned short*) 0x000B8000 + (start_y * 80) + start_x;
+	
+	for(unsigned char i = 0; i < y; i++){
+		for(unsigned char j = 0; j < x; j++){
+			unsigned short *where = (unsigned short*) buffer + (i * 80) + j;
+			*where =  0x23 | (attr << 8);
+		}
+	}
+}
 
 void draw_s(char* string, unsigned char fg, unsigned char bg)
 {