aedrix-kernel/kernel/console.c

/*
    Copyright (C) 2012, Aaron Lindsay <aaron@aclindsay.com>

    This file is part of Aedrix.

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <font.h>
#include <framebuffer.h>

#define CONSOLE_BUFFER_SIZE 16384
char console_buffer[CONSOLE_BUFFER_SIZE];
char console_output_buffer[CONSOLE_BUFFER_SIZE];
char *console_buffer_p = console_buffer;
struct fb *console_framebuffer = 0;
struct font *console_font = 0;
unsigned int chars_per_line = 0, lines = 0;

void console_char_to_fb(char c, unsigned int x, unsigned int y) {
	unsigned int cx, cy, bit = 0;
	char *font_char = &console_font->data[console_font->bytes_per_char * (c - console_font->ascii_offset)];

	for (cy = 0; cy < console_font->height; cy++) {
		for (cx = 0; cx < console_font->width; cx++) {
			unsigned char on = font_char[bit / 8] & (1 << (bit % 8));
			if (on)
				fb_write_pixel(console_framebuffer, x + cx, y + cy, 0xff, 0xff, 0xff);
			else
				fb_write_pixel(console_framebuffer, x + cx, y + cy, 0x00, 0x00, 0x00);
			bit++;
		}
	}
}

void console_refresh_fb() {
	if (!console_framebuffer)
		return;
}

void console_clear() {
	int i;
	for (i = 0; i < CONSOLE_BUFFER_SIZE; i++) {
		console_buffer[i] = 0;
	}
}

void console_init(struct fb *f) {
	console_clear();
	console_refresh_fb();
	console_font = font_get();
	console_framebuffer = f;
	chars_per_line = console_framebuffer->width / console_font->width;
	lines = console_framebuffer->height / console_font->height;

	console_char_to_fb('A', 100, 100);
	console_char_to_fb('E', 111, 100);
	console_char_to_fb('D', 122, 100);
	console_char_to_fb('R', 133, 100);
	console_char_to_fb('I', 144, 100);
	console_char_to_fb('X', 155, 100);
}

void console_putc(char c) {
	*console_buffer_p = c;
	if (++console_buffer_p > console_buffer + CONSOLE_BUFFER_SIZE)
		console_buffer_p = console_buffer;
}