finished tty system for now

src/headers/graphics.h

@@ -153,6 +153,7 @@ static uint8_t VGA_basic8x8font[128][8] = {
 static uint8_t VGA_palette[256][3];
 void VGA_setchar(virtualConsole* con, uint8_t x, uint8_t y, char val);
 void VGA_renderchar(virtualConsole* con);
+void _VGA_renchar(uint8_t x, uint8_t y, char val, uint8_t fcolor[3], uint8_t bcolor[3]);
 static uint8_t* VGA_fbuf = (unsigned char*)0xA0000;
 static uint8_t VGA_values[] = { // THIS. THIS IS CANCER.
     // MISC

src/headers/stdlib.h

@@ -5,6 +5,7 @@ uint32_t strlen32(char* str);
 void strrev32(char* str);
 uint8_t uitoa32(uint32_t x, char* str);
 void memcopy(void* dest, void* src, size_t size);
+void kpanic(char* msg);
 static inline void outb(uint16_t port, uint8_t val) {
     __asm__ volatile ( "outb %b0, %w1" : : "a"(val), "Nd"(port) : "memory");
 }

src/headers/stdmem.h

@@ -1,4 +0,0 @@
-#pragma once
-#include "stddef.h"
-
-void memcpy32(void* dest, void* src, uint32_t length);

src/headers/tty.h

@@ -8,12 +8,13 @@ typedef struct {
     uint8_t FU_forecolor[3];
     uint8_t FU_backcolor[3];
     char charbuf[40][25];
+    uint8_t enableRendering;
 } virtualConsole;
 typedef void (*FU_kupdbuf_t)(virtualConsole*);
 
 #define consolesAmount 12
-static virtualConsole consoles[consolesAmount];
-static uint8_t currentConsole = 0;
+extern virtualConsole consoles[consolesAmount];
+extern uint8_t currentConsole;
 
 void con_kputchar(virtualConsole* con, char x);
 void con_kputstr(virtualConsole* con, char* x);

src/kernel/entry.c

@@ -50,6 +50,11 @@ void kernel_main(struct multiboot_info* header, uint32_t magic) {
 	kputstr("Setting up stdout rendering: ");
 	for (uint8_t i=0;i<consolesAmount;i++) {
 		consoles[i].FU_kupdbuf = &VGA_kstrrend;
+		consoles[i].enableRendering = 1;
+		if (consoles[i].FU_kupdbuf != &VGA_kstrrend) {
+			kpanic("Failure with stdout: code 1");
+			while (1) {} 
+		}
 	}
 	kputstr("OK\n");
 

src/kernel/graphics.c

@@ -5,7 +5,10 @@ inline uint8_t _VGA_nearestmul(uint8_t val, uint8_t multiple) {
     if (val%multiple == 0) {return val;}
     return val + multiple - (val%multiple);
 }
-void inline _VGA_renchar(uint8_t x, uint8_t y, char val, uint8_t fcolor[3], uint8_t bcolor[3]) {
+void _VGA_renchar(uint8_t x, uint8_t y, char val, uint8_t fcolor[3], uint8_t bcolor[3]) {
+    if (val > 127) { // out of bounds, no ascii character
+        return;
+    }
     for (uint8_t px=0;px<8;px++) {
         for (uint8_t py=0;py<8;py++) {
             VGA_setpix(x*8+px,y*8+py,(VGA_basic8x8font[val][py] >> px) & 1 ? *(VGA_pixel*)fcolor : *(VGA_pixel*)bcolor);

src/kernel/stdlib.c

@@ -1,4 +1,5 @@
 #include "../headers/stdlib.h"
+#include "../headers/graphics.h"
 
 uint32_t strlen32(char* str) {
     uint32_t i = 0;
@@ -27,4 +28,23 @@ void memcopy(void* dest, void* src, size_t size) {
     for (size_t i=0;i<size;i++) {
         ((uint8_t*)dest)[i] = ((uint8_t*)src)[i];
     }
+}
+void kpanic(char* msg) {
+    for (uint16_t x=0;x<320;x++) {
+		for (uint16_t y=0;y<200;y++) {
+			VGA_setpix(x,y,(VGA_pixel){0x00,0xFF,0x00});
+		}
+	}
+    size_t x=0;
+    size_t y=0;
+    while (*msg != 0) {
+        if (*msg == '\n') {
+            y ++;
+            x = 0;
+            msg ++;
+            continue;
+        }
+        _VGA_renchar(x++,y,*msg++,(uint8_t[]){0xFF,0xFF,0xFF},(uint8_t[]){0x00,0xFF,0x00});
+    }
+    while (1) {}
 }

src/kernel/tty.c

@@ -1,6 +1,9 @@
 #include "../headers/tty.h"
 #include "../headers/graphics.h"
+#include "../headers/stdlib.h"
 
+virtualConsole consoles[consolesAmount];
+uint8_t currentConsole = 0;
 void con_dummyrend(virtualConsole* con) {}
 void con_kputchar(virtualConsole* con, char x) {
     if (con->kstdout_count == 8192) {
@@ -10,9 +13,11 @@ void con_kputchar(virtualConsole* con, char x) {
         con->kstdout_count --;
     }
     con->kstdout[con->kstdout_count++] = x;
-    if (&consoles[currentConsole] == con) { // current console
+    if (&consoles[currentConsole] == con && con->enableRendering) { // current console
         if (con->FU_kupdbuf != 0x00) {
             ((FU_kupdbuf_t)con->FU_kupdbuf)(con);
+        } else {
+            kpanic("virtualConsole failure:\nFU_kupdbuf is 0x00.");
         }
     }
 }
@@ -30,6 +35,7 @@ void con_init(virtualConsole* con) {
     con->FU_backcolor[0] = 0x00;
     con->FU_backcolor[1] = 0x00;
     con->FU_backcolor[2] = 0x00;
+    con->enableRendering = 0;
 }
 void kputchar(char x) {
     con_kputchar(&consoles[currentConsole], x);