Terminal

kernel/drivers/terminal/terminal.cpp

@@ -5,35 +5,55 @@
 static const int TERMINAL_WIDTH = 80;
 static const int TERMINAL_HEIGHT = 24;
 
-static char* frameBuffer = (char*)0xB8000;
+static VGAChar_t* frameBuffer = (VGAChar_t*)0xB8000;
 
 static char clearColour = 0x0;
-static char bgColour    = 0x0;
+static char bgColour    = 0x0; 
 static char fgColour    = 0xF;
 
-struct Cursor {
-    uint8_t x;
-    uint8_t y;
-} __attribute__((packed));
-
 Cursor cursor;
 
 void cls() {
-    for (uint8_t x = 0; x < TERMINAL_WIDTH; x++) {
-        for (uint8_t y = 0; y < TERMINAL_HEIGHT; y++) {
-            frameBuffer[x + TERMINAL_WIDTH * y] = 0;
-        }
-    }
+    for (uint8_t x = 0; x < TERMINAL_WIDTH; x++)
+        for (uint8_t y = 0; y < TERMINAL_HEIGHT; y++)
+            putchar(x, y, ' ', fgColour, clearColour);
 
-    moveCursor(0,0);
+    cursor.x = 0; cursor.y = 0;
+    updateCursor(cursor);
 }
 
 void putchar(char input) {
+    if (cursor.x + 1 > TERMINAL_WIDTH) {
+        nline();
+    }
+    if (input == '\n') {
+        nline();
+    } else {
+        putchar(cursor.x, cursor.y, input, fgColour, bgColour);
+        cursor.x++;
+    }
+    updateCursor(cursor);
+}
 
+void putchar(int x, int y, char c, char foreground, char background) {
+    frameBuffer[(y * TERMINAL_WIDTH) + x].c = c;
+    frameBuffer[(y * TERMINAL_WIDTH) + x].foreground = foreground;
+    frameBuffer[(y * TERMINAL_WIDTH) + x].background = background;
 }
 
 void write(char* input) {
-
+    for (uint32_t i = 0; i < strlen(input); i++) {
+        if (cursor.x + 1 > TERMINAL_WIDTH) {
+            nline();
+        }
+        if (input[i] == '\n') {
+            nline();
+        } else {
+            putchar(cursor.x, cursor.y, input[i], fgColour, bgColour);
+            cursor.x++;
+        }
+    }
+    updateCursor(cursor);
 }
 
 void writeln(char* input) {
@@ -42,19 +62,29 @@ void writeln(char* input) {
 }
 
 void nline() {
-
+    cursor.y++;
+    cursor.x = 0;
+    updateCursor(cursor);
 }
 
 void setClearColour(char col) {
     clearColour = col;
 }
 
+void setFGColour(char col) {
+    fgColour = col;
+}
+
+void setBGColour(char col) {
+    bgColour = col;
+}
+
 void showCursor() {
     outb(0x3D4, 0x0A);
-	outb(0x3D5, (inb(0x3D5) & 0xC0) | 1);
+	outb(0x3D5, (inb(0x3D5) & 0xC0) | 0x0); // Cursor start top
  
 	outb(0x3D4, 0x0B);
-	outb(0x3D5, (inb(0x3D5) & 0xE0) | 1);
+	outb(0x3D5, (inb(0x3D5) & 0xE0) | 0xF); // Cursor start bottom
 }
 
 void hideCursor() {
@@ -62,11 +92,20 @@ void hideCursor() {
 	outb(0x3D5, 0x20);
 }
 
-void moveCursor(int x, int y) {
-    uint16_t pos = y * TERMINAL_WIDTH + x;
+void updateCursor(Cursor c) {
+    uint16_t pos = c.y * TERMINAL_WIDTH + c.x;
  
 	outb(0x3D4, 0x0F);
 	outb(0x3D5, (uint8_t) (pos & 0xFF));
 	outb(0x3D4, 0x0E);
 	outb(0x3D5, (uint8_t) ((pos >> 8) & 0xFF));
 }
+
+void setCursorPosition(int x, int y) {
+    cursor.x = x; cursor.y = y;
+    updateCursor(cursor);
+}
+
+uint8_t getVGACol(char f, char b) {
+    return f | b << 4;
+}