Switched to Makefile.

Kinda for the sake of minimalism

3 files changed, 85 insertions, 4 deletions

diff --git a/src/drivers/vesa.c b/src/drivers/vesa.c
new file mode 100644
index 0000000..ca130db
--- /dev/null
+++ b/src/drivers/vesa.c
@@ -0,0 +1,25 @@
+#include <def.h>
+#include <vesa.h>
+
+void vesa_draw_rectangle(int x1, int y1, int x2, int y2, const u32 color[3])
+{
+	int vbe_bpl = vbe->bpp >> 3;
+	int vbe_pitch = vbe->pitch;
+	u8 *fb = (u8 *)vbe->framebuffer;
+
+	int pos1 = x1 * vbe_bpl + y1 * vbe_pitch;
+	char *draw = (char *)&fb[pos1];
+	for (int i = 0; i <= y2 - y1; i++) {
+		for (int j = 0; j <= x2 - x1; j++) {
+			draw[vbe_bpl * j] = (char)color[2];
+			draw[vbe_bpl * j + 1] = (char)color[1];
+			draw[vbe_bpl * j + 2] = (char)color[0];
+		}
+		draw += vbe_pitch;
+	}
+}
+
+void vesa_clear(const u32 color[3])
+{
+	vesa_draw_rectangle(0, 0, vbe->width - 1, vbe->height - 1, color);
+}
diff --git a/src/inc/vesa.h b/src/inc/vesa.h
new file mode 100644
index 0000000..e2ac4e5
--- /dev/null
+++ b/src/inc/vesa.h
@@ -0,0 +1,53 @@
+#ifndef VBE_H
+#define VBE_H
+
+#include <def.h>
+
+struct vbe {
+	u16 attributes;
+	u8 window_a;
+	u8 window_b;
+	u16 granularity;
+	u16 window_size;
+	u16 segment_a;
+	u16 segment_b;
+	u32 win_func_ptr;
+	u16 pitch;
+	u16 width;
+	u16 height;
+	u8 w_char;
+	u8 y_char;
+	u8 planes;
+	u8 bpp;
+	u8 banks;
+	u8 memory_model;
+	u8 bank_size;
+	u8 image_pages;
+	u8 reserved0;
+
+	u8 red_mask;
+	u8 red_position;
+	u8 green_mask;
+	u8 green_position;
+	u8 blue_mask;
+	u8 blue_position;
+	u8 reserved_mask;
+	u8 reserved_position;
+	u8 direct_color_attributes;
+
+	u32 framebuffer;
+	u32 off_screen_mem_off;
+	u16 off_screen_mem_size;
+	u8 reserved1[206];
+};
+
+struct vid_info {
+	u32 mode;
+	struct vbe *info;
+};
+
+struct vbe *vbe;
+
+void vesa_clear(const u32 color[3]);
+
+#endif
diff --git a/src/main.c b/src/main.c
index b801da9..78a2315 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,11 +1,14 @@
 #include <def.h>
+#include <vesa.h>
 
-// This must kinda be at the top
-int main(u32 *mem_info, u32 *vid_info)
+void main(u32 *mem_info, struct vid_info *vid_info)
 {
 	mem_info++; // TODO: Use the mmap!
-	vid_info++; // TODO: Use the VBE struct!
+	vbe = vid_info->info;
+
+	u32 terminal_background[3] = { 0x1d, 0x1f, 0x24 };
+	vesa_clear(terminal_background);
+
 	while (1) {
 	};
-	return 0;
 }