From a4eef728064cfc3f14396d0ad91f105f12ef32ea Mon Sep 17 00:00:00 2001
From: Jacob McDonnell <jacob@jacobmcdonnell.com>
Date: Sun, 8 Jun 2025 15:03:33 -0400
Subject: Initial Commit

---
 source/main.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 source/main.c

(limited to 'source/main.c')

diff --git a/source/main.c b/source/main.c
new file mode 100644
index 0000000..316274f
--- /dev/null
+++ b/source/main.c
@@ -0,0 +1,51 @@
+#include <stddef.h>
+#include <limine.h>
+#include "LimineRequests.h"
+#include "memory.h"
+
+static void HaltForever(void) {
+    while (true) {
+        asm("hlt");
+    }
+}
+
+void KernelMain(void) {
+    if (!VerifyBaseRevision()) {
+        HaltForever();
+    }
+
+    if (!VerifyStackSizeRequest()) {
+        HaltForever();
+    }
+
+    if (!VerifyFramebufferRequest()) {
+        HaltForever();
+    }
+
+    const uint64_t framebufferCount =
+        framebufferRequest.response->framebuffer_count;
+
+    struct limine_framebuffer **framebuffers =
+        framebufferRequest.response->framebuffers;
+
+    struct limine_framebuffer *framebuffer = nullptr;
+
+    const uint32_t colors[] = {0xFF0000, 0x00FF00, 0x0000FF};
+    uint8_t count = 0;
+    uint8_t color = 0;
+
+    for (uint64_t i = 0; i < framebufferCount; i++) {
+        framebuffer = framebuffers[i];
+        volatile uint32_t *fb_ptr = (volatile uint32_t *)framebuffer->address;
+        for (uint64_t j = 0; j < framebuffer->height && j < framebuffer->width;
+                j++) {
+            fb_ptr[j * (framebuffer->pitch / 4) + j] = colors[color];
+            if ((count = (count + 1) % 16) == 0) {
+                color = (color + 1) % 3;
+            }
+        }
+    }
+
+    HaltForever();
+}
+
-- 
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