From 4432d2242c1474ec0195c4952897a629b212c996 Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Thu, 5 Aug 2021 14:47:15 +0000
Subject: main: use routines from video-vga

---
 kernel/main.c | 105 +++-------------------------------------------------------
 1 file changed, 4 insertions(+), 101 deletions(-)

(limited to 'kernel')

diff --git a/kernel/main.c b/kernel/main.c
index 47fcecd..5e6491c 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -1,6 +1,4 @@
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
+#include "video-vga.h"
 
 /* Check if the compiler thinks you are targeting the wrong operating system. */
 #if defined(__linux__)
@@ -10,105 +8,10 @@
 #if !defined(__i386__)
 #error "This kernel needs to be compiled with a ix86-elf compiler"
 #endif
-
-/* Hardware text mode color constants. */
-enum vga_color {
-	VGA_COLOR_BLACK = 0,
-	VGA_COLOR_BLUE = 1,
-	VGA_COLOR_GREEN = 2,
-	VGA_COLOR_CYAN = 3,
-	VGA_COLOR_RED = 4,
-	VGA_COLOR_MAGENTA = 5,
-	VGA_COLOR_BROWN = 6,
-	VGA_COLOR_LIGHT_GREY = 7,
-	VGA_COLOR_DARK_GREY = 8,
-	VGA_COLOR_LIGHT_BLUE = 9,
-	VGA_COLOR_LIGHT_GREEN = 10,
-	VGA_COLOR_LIGHT_CYAN = 11,
-	VGA_COLOR_LIGHT_RED = 12,
-	VGA_COLOR_LIGHT_MAGENTA = 13,
-	VGA_COLOR_LIGHT_BROWN = 14,
-	VGA_COLOR_WHITE = 15
-};
-
-static const size_t VGA_WIDTH = 80;
-static const size_t VGA_HEIGHT = 25;
-
-size_t terminal_row;
-size_t terminal_column;
-uint8_t terminal_color;
-uint16_t *terminal_buffer;
-
-static uint8_t vga_entry_color(enum vga_color fg, enum vga_color bg)
-{
-	return fg | bg << 4;
-}
-
-static uint16_t vga_entry(unsigned char uc, uint8_t color)
-{
-	return (uint16_t) uc | (uint16_t) color << 8;
-}
-
-size_t strlen(const char* str) 
-{
-	size_t len = 0;
-	while(str[len])
-		len++;
-	return len;
-}
-
-void terminal_initialize(void) 
-{
-	size_t x, y;
-	terminal_row = 0;
-	terminal_column = 0;
-	terminal_color = vga_entry_color(VGA_COLOR_LIGHT_GREY, VGA_COLOR_BLACK);
-	terminal_buffer = (uint16_t*) 0xB8000;
-	for(y = 0; y < VGA_HEIGHT; y++) {
-		for(x = 0; x < VGA_WIDTH; x++) {
-			const size_t index = y * VGA_WIDTH + x;
-			terminal_buffer[index] = vga_entry(' ', terminal_color);
-		}
-	}
-}
-
-void terminal_setcolor(uint8_t color) 
-{
-	terminal_color = color;
-}
-
-void terminal_putentryat(char c, uint8_t color, size_t x, size_t y) 
-{
-	const size_t index = y * VGA_WIDTH + x;
-	terminal_buffer[index] = vga_entry(c, color);
-}
-
-void terminal_putchar(char c) 
-{
-	terminal_putentryat(c, terminal_color, terminal_column, terminal_row);
-	if(++terminal_column == VGA_WIDTH) {
-		terminal_column = 0;
-		if(++terminal_row == VGA_HEIGHT)
-			terminal_row = 0;
-	}
-}
-
-void terminal_write(const char* data, size_t size) 
-{
-	size_t i;
-	for(i = 0; i < size; i++)
-		terminal_putchar(data[i]);
-}
-
-void terminal_writestring(const char* data) 
-{
-	terminal_write(data, strlen(data));
-}
-
 void kernel_main(void) 
 {
-	/* Initialize terminal interface */
-	terminal_initialize();
+	/* Initialize VGA video hardware */
+	vga_init();
 
-	terminal_writestring("Welcome to MFSOS!");
+	vga_print("Welcome to MFSOS!\n\t");
 }
-- 
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