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/* ----------------------------------------------------------------------- *
*
* Copyright 2004-2009 H. Peter Anvin - All Rights Reserved
* Copyright 2009 Intel Corporation; author: H. Peter Anvin
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
/*
* vesacon_write.c
*
* Write to the screen using ANSI control codes (about as capable as
* DOS' ANSI.SYS.)
*/
#include <errno.h>
#include <string.h>
#include <com32.h>
#include <minmax.h>
#include <colortbl.h>
#include <console.h>
#include <klibc/compiler.h>
#include <syslinux/config.h>
#include "ansi.h"
#include "file.h"
#include "vesa/video.h"
static void vesacon_erase(const struct term_state *, int, int, int, int);
static void vesacon_write_char(int, int, uint8_t, const struct term_state *);
static void vesacon_showcursor(const struct term_state *);
static void vesacon_setcursor(int x, int y, bool visible);
static void vesacon_scroll_up(const struct term_state *);
static struct term_state ts;
static struct ansi_ops op = {
.erase = vesacon_erase,
.write_char = vesacon_write_char,
.showcursor = vesacon_showcursor,
.set_cursor = vesacon_setcursor,
.scroll_up = vesacon_scroll_up,
.beep = __ansicon_beep,
};
static struct term_info ti = {
.disabled = 0,
.ts = &ts,
.op = &op
};
/* Reference counter to the screen, to keep track of if we need
reinitialization. */
static int vesacon_counter = 0;
static struct {
int x, y;
} vesacon_resolution = {
.x = DEFAULT_VESA_X_SIZE,
.y = DEFAULT_VESA_Y_SIZE,
};
/* Set desired resolution - requires a full close/open cycle */
void vesacon_set_resolution(int x, int y)
{
vesacon_resolution.x = x;
vesacon_resolution.y = y;
}
/* Common setup */
int __vesacon_open(struct file_info *fp)
{
(void)fp;
if (!vesacon_counter) {
/* Are we disabled? */
if (syslinux_serial_console_info()->flowctl & 0x8000) {
ti.disabled = 1;
ti.rows = 25;
ti.cols = 80;
} else {
/* Switch mode */
if (__vesacon_init(vesacon_resolution.x, vesacon_resolution.y)) {
vesacon_counter = -1;
return EAGAIN;
}
/* Initial state */
__ansi_init(&ti);
ti.rows = __vesacon_text_rows;
ti.cols = __vesacon_text_cols;
}
} else if (vesacon_counter == -1) {
return EAGAIN;
}
fp->o.rows = ti.rows;
fp->o.cols = ti.cols;
vesacon_counter++;
return 0;
}
int __vesacon_close(struct file_info *fp)
{
(void)fp;
vesacon_counter--;
return 0;
}
/* Erase a region of the screen */
static void vesacon_erase(const struct term_state *st,
int x0, int y0, int x1, int y1)
{
__vesacon_erase(x0, y0, x1, y1, st->cindex);
}
/* Draw text on the screen */
static void vesacon_write_char(int x, int y, uint8_t ch,
const struct term_state *st)
{
__vesacon_write_char(x, y, ch, st->cindex);
}
/* Show or hide the cursor */
static bool cursor_enabled = true;
void vesacon_cursor_enable(bool enabled)
{
cursor_enabled = enabled;
}
static void vesacon_showcursor(const struct term_state *st)
{
vesacon_setcursor(st->xy.x, st->xy.y, st->cursor);
}
static void vesacon_setcursor(int x, int y, bool visible)
{
__vesacon_set_cursor(x, y, visible && cursor_enabled);
}
static void vesacon_scroll_up(const struct term_state *st)
{
__vesacon_scroll_up(1, st->cindex);
}
ssize_t __vesacon_write(struct file_info *fp, const void *buf, size_t count)
{
const unsigned char *bufp = buf;
size_t n = 0;
(void)fp;
if (ti.disabled)
return count; /* Nothing to do */
/* This only updates the shadow text buffer... */
while (count--) {
__ansi_putchar(&ti, *bufp++);
n++;
}
/* This actually draws it */
__vesacon_doit();
return n;
}
const struct output_dev dev_vesacon_w = {
.dev_magic = __DEV_MAGIC,
.flags = __DEV_TTY | __DEV_OUTPUT,
.fileflags = O_WRONLY | O_CREAT | O_TRUNC | O_APPEND,
.write = __vesacon_write,
.close = __vesacon_close,
.open = __vesacon_open,
.fallback = &dev_ansicon_w,
};
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