working on exposing vga to userspace

kernel/lib/console.c

@@ -1,5 +1,8 @@
+#include "drivers/serial/serial.h"
+
 #include <lib/console.h>
 #include <lib/font.h>
+#include <lib/print.h>
 
 #include <drivers/vga/vga.h>
 
@@ -7,10 +10,13 @@ static psf_font_t* font;
 
 static uint32_t console_row;
 static uint32_t console_col;
+static uint32_t console_width;
+static uint32_t console_height;
 static uint32_t console_text_color;
 static uint32_t console_backgrnd_color;
 
 static void write_vga_char(char c) {
+    print_serial("write_vga_char invoked\r\n");
     uint32_t vga_pitch = vga_get_pitch();
     uint8_t* glyph = (uint8_t*)font->glyphs + (c * font->hdr->charsz);
 
@@ -34,7 +40,14 @@ static void write_vga_char(char c) {
 
 int set_console_font(const char* path) {
     font = load_font(path);
-    return font != NULL;
+    if (!font) {
+        return 0;
+    }
+
+    console_width = vga_get_width() / 8;
+    console_height = vga_get_height() / font->hdr->charsz;
+
+    return 1;
 }
 
 void set_console_fg(uint32_t color) {
@@ -48,10 +61,35 @@ void set_console_bg(uint32_t color) {
 void console_init() {
     console_row = 0;
     console_col = 0;
+
     set_console_fg(0xFFFFFFFF);
-    vga_clear_scrn(0x000000FF);
+    set_console_bg(0xFF6c7482);
+    vga_clear_scrn(console_backgrnd_color);
 }
 
 void console_putchar(char c) {
+    if (!font) return;
+
+    if (c == '\n') {
+        print_serial("\r\n");
+        console_col = 0;
+        console_row++;
+        if (console_row >= console_height) {
+            console_row = 0;
+        }
+        return;
+    }
+    
+    write_serial(c);
     write_vga_char(c);
+    
+    console_col++;
+    if (console_col >= console_width) {
+        console_col = 0;
+        console_row++;
+    }
+
+    if (console_row >= console_height) {
+        console_row = 0;
+    }
 }