From 975a9ec96e282e437ccc1bdf1e660dcbf4542791 Mon Sep 17 00:00:00 2001
From: EmulatedSeasons <89668582+EmulatedSeasons@users.noreply.github.com>
Date: Fri, 10 May 2024 01:44:59 -0400
Subject: Added GDT and basic IDT as well as a bitmap drawing function

---
 kernel/framebuffer.cpp | 37 ++++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 11 deletions(-)

(limited to 'kernel/framebuffer.cpp')

diff --git a/kernel/framebuffer.cpp b/kernel/framebuffer.cpp
index a07d61a..ca6ddb6 100644
--- a/kernel/framebuffer.cpp
+++ b/kernel/framebuffer.cpp
@@ -2,21 +2,36 @@
 #include <stdint.h>
 #include <stddef.h>
 
-Framebuffer::Framebuffer(uint32_t* addr, const uint64_t width, const uint64_t height) 
-    : addr {addr}, width {width}, height {height} {
-    clear();
+uint32_t* fb_addr;
+uint64_t fb_width;
+uint64_t fb_height;
+
+void fb_init(uint32_t* addr, uint64_t width, uint64_t height) {
+    fb_addr = addr;
+    fb_width = width;
+    fb_height = height;
+    fb_clear();
 }
 
-void Framebuffer::clear() {
-    for (size_t y = 0; y < height; y++) {
-        for (size_t x = 0; x < width; x++) {
-            const size_t i = y * width + x;
-            addr[i] = 0x000000;
+void fb_clear() {
+    for (size_t y = 0; y < fb_height; y++) {
+        for (size_t x = 0; x < fb_width; x++) {
+            const size_t i = y * fb_width + x;
+            fb_addr[i] = 0x000000;
         }
     }
 }
 
-void Framebuffer::drawpixel(const uint64_t x, const uint64_t y, const uint32_t color) {
-    const size_t pos = y * width + x;
-    addr[pos] = color;
+void draw_pixel(const uint64_t x, const uint64_t y, const uint32_t color) {
+    const size_t pos = y * fb_width + x;
+    fb_addr[pos] = color;
+}
+
+void draw_bitmap(const uint32_t* bitmap, const uint64_t x_pos, const uint64_t y_pos, const uint64_t width, const uint64_t height) {
+    for (size_t y = 0; y < height; y++) {
+        for (size_t x = 0; x < width; x++) {
+            const size_t i = y * width + x;
+            draw_pixel(x_pos + x, y_pos + y, bitmap[i]);
+        }
+    }    
 }
\ No newline at end of file
-- 
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