Started integrating vesa resolution finder

1 files changed, 36 insertions, 3 deletions

diff --git a/src/kernel/graphics/vesa.c b/src/kernel/graphics/vesa.c
index af2502b..cab6c70 100644
--- a/src/kernel/graphics/vesa.c
+++ b/src/kernel/graphics/vesa.c
@@ -1,4 +1,12 @@
 #include "vesa.h"
+#include "graphics.h"
+#include "../sound/sound.h"
+#include "../lib/lib.h"
+#include "../acpi/acpi.h"
+
+void switch_to_vga() {
+    terminal_initialize();
+}
 
 vbe_mode_info *vbe_set_mode(unsigned short mode) {
     regs16_t regs;
@@ -13,7 +21,7 @@ vbe_mode_info *vbe_set_mode(unsigned short mode) {
         regs.es = 0xA000;
         int32(0x10, &regs);
         if (regs.ax != 0x004F) {
-            // Add VGA redirect
+            switch_to_vga();
         }
 
         vbe_mode_info *vbe_info = (vbe_mode_info *) 0xA0000;
@@ -24,8 +32,10 @@ vbe_mode_info *vbe_set_mode(unsigned short mode) {
         vbe_pitch = vbe_info->pitch;
 
         char *fb = (char *) vbe_info->framebuffer;
-        for (int i = 0; i < 640 * 480 * 3; i++) {
+        for (int i = 0; i < vbe_width * vbe_height * vbe_bpp; i++) {
             fb[i] = 100;
+            fb[i + 1] = 100;
+            fb[i + 2] = 100;
         }
         regs.ax = 0x0000;
         int32(0x16, &regs);
@@ -34,9 +44,32 @@ vbe_mode_info *vbe_set_mode(unsigned short mode) {
 
         return vbe_info;
     } else {
-        // Add VGA redirect
+        switch_to_vga();
     }
 
     vbe_mode_info vbe_info;
     return &vbe_info;
 }
+
+void set_optimal_resolution() {
+    extern vbe_info *vbe_init_structure;
+    regs16_t regs;
+    regs.ax = 0x4F01;
+    regs.cx = vbe_init_structure;
+    regs.di = 0x0000;
+    regs.es = 0xA000;
+    int32(0x10, &regs);
+
+    if (regs.ax != 0x004F) {
+        switch_to_vga();
+    }
+
+    vbe_info *vbe_modes = (vbe_info *) 0xA0000;
+    if (strcmp(vbe_modes->signature, "VESA") == 0) {
+        loop:
+        asm volatile ("hlt");
+        goto loop;
+    } else {
+        acpi_poweroff();
+    }
+}
\ No newline at end of file