From 7a912d1b668ab86ffe088eca3ac7e6f78a04a0c5 Mon Sep 17 00:00:00 2001
From: Tyler Murphy <=>
Date: Mon, 17 Jul 2023 19:34:52 -0400
Subject: refactoring

---
 kernel/src/arch/i686/drivers/vga.c | 50 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 kernel/src/arch/i686/drivers/vga.c

(limited to 'kernel/src/arch/i686/drivers/vga.c')

diff --git a/kernel/src/arch/i686/drivers/vga.c b/kernel/src/arch/i686/drivers/vga.c
new file mode 100644
index 0000000..a41ce54
--- /dev/null
+++ b/kernel/src/arch/i686/drivers/vga.c
@@ -0,0 +1,50 @@
+#include <arch/i686/asm.h>
+#include <drivers/vga.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+static uint16_t *buffer = (uint16_t*) 0xC03FF000;
+static uint8_t start, end;
+
+void vgatext_write(char c, enum vga_color color, uint8_t x, uint8_t y) {
+	const size_t index = y * VGA_TEXT_W + x;
+	buffer[index] = c | (uint16_t) color << 8;
+}
+
+void vgatext_write_data(uint16_t data, uint16_t index) {
+    buffer[index] = data;
+}
+
+void vgatext_write_buf(const uint16_t *src) {
+    memcpy(buffer, src, VGA_TEXT_W * VGA_TEXT_H * sizeof(uint16_t));
+}
+
+void vgatext_cur_mov(uint8_t x, uint8_t y) {
+;	const uint16_t pos = y * VGA_TEXT_W + x;
+ 
+	outb(0x3D4, 0x0F);
+	outb(0x3D5, (uint8_t) (pos & 0xFF));
+	outb(0x3D4, 0x0E);
+	outb(0x3D5, (uint8_t) ((pos >> 8) & 0xFF));
+}
+
+void vgatext_cur_resize(uint8_t s, uint8_t e) {
+    start = s;
+    end = e;
+
+    outb(0x3D4, 0x0A);
+    outb(0x3D5, (inb(0x3D5) & 0xC0) | start);
+ 
+    outb(0x3D4, 0x0B);
+    outb(0x3D5, (inb(0x3D5) & 0xE0) | end);
+}
+
+void vgatext_cur_visible(bool visible) {
+    if (visible) {
+        vgatext_cur_resize(start, end);
+    } else {
+        outb(0x3D4, 0x0A);
+	    outb(0x3D5, 0x20);
+    }
+}
-- 
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