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/*
* Copyright © 2016 Keith Packard <keithp@keithp.com>
*
* 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.
*/
#include "ao.h"
#include "ao_console.h"
#include "ao_ps2.h"
#include "ao_vga.h"
static uint8_t console_row, console_col;
#define ao_console_bitmap ao_vga_bitmap
static uint8_t console_rows, console_cols;
static void
ao_console_scroll(void)
{
ao_copy(&ao_console_bitmap,
0, 0,
ao_console_bitmap.width,
ao_console_bitmap.height - ao_font.height,
&ao_console_bitmap,
0, ao_font.height,
AO_COPY);
ao_rect(&ao_console_bitmap,
0,
(console_rows - 1) * ao_font.height,
ao_console_bitmap.width,
ao_font.height,
1,
AO_COPY);
}
static void
ao_console_cursor(void)
{
ao_rect(&ao_console_bitmap,
console_col * ao_font.width,
console_row * ao_font.height,
ao_font.width,
ao_font.height,
1,
AO_XOR);
}
static void
ao_console_clear(void)
{
ao_rect(&ao_console_bitmap,
0, 0,
ao_console_bitmap.width,
ao_console_bitmap.height,
1,
AO_COPY);
}
static void
ao_console_space(void)
{
ao_rect(&ao_console_bitmap,
console_col * ao_font.width,
console_row * ao_font.height,
ao_font.width,
ao_font.height,
1,
AO_COPY);
}
static void
ao_console_newline(void)
{
if (++console_row == console_rows) {
ao_console_scroll();
console_row--;
}
}
void
ao_console_putchar(char c)
{
if (' ' <= c && c < 0x7f) {
char text[2];
ao_console_space();
text[0] = c;
text[1] = '\0';
ao_text(&ao_console_bitmap,
console_col * ao_font.width,
console_row * ao_font.height + ao_font.ascent,
text,
0,
AO_COPY);
if (++console_col == console_cols) {
console_col = 0;
ao_console_newline();
}
} else {
ao_console_cursor();
switch (c) {
case '\r':
console_col = 0;
break;
case '\t':
console_col += 8 - (console_col & 7);
if (console_col >= console_cols) {
console_col = 0;
ao_console_newline();
}
break;
case '\n':
ao_console_newline();
break;
case '\f':
console_col = console_row = 0;
ao_console_clear();
break;
case '\177':
case '\010':
if (console_col)
console_col--;
break;
}
}
ao_console_cursor();
}
void
ao_console_init(void)
{
console_cols = ao_console_bitmap.width / ao_font.width;
console_rows = ao_console_bitmap.height / ao_font.height;
#if CONSOLE_STDIN
ao_ps2_stdin = 1;
ao_add_stdio(_ao_ps2_pollchar,
ao_console_putchar,
NULL);
#endif
ao_console_clear();
ao_console_cursor();
ao_vga_enable(1);
}
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