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/*
* linux/drivers/video/mfb.c -- Low level frame buffer operations for
* monochrome
*
* Created 5 Apr 1997 by Geert Uytterhoeven
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/config.h>
#include <linux/fb.h>
#include "fbcon.h"
/*
* Prototypes
*/
static int open_mfb(struct display *p);
static void release_mfb(void);
static void bmove_mfb(struct display *p, int sy, int sx, int dy, int dx,
int height, int width);
static void clear_mfb(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width);
static void putc_mfb(struct vc_data *conp, struct display *p, int c, int yy,
int xx);
static void putcs_mfb(struct vc_data *conp, struct display *p, const char *s,
int count, int yy, int xx);
static void rev_char_mfb(struct display *p, int xx, int yy);
/*
* `switch' for the low level operations
*/
static struct display_switch dispsw_mfb = {
open_mfb, release_mfb, bmove_mfb, clear_mfb, putc_mfb, putcs_mfb,
rev_char_mfb
};
/*
* Monochrome
*/
static int open_mfb(struct display *p)
{
if (p->var.bits_per_pixel != 1)
return -EINVAL;
if (p->line_length)
p->next_line = p->line_length;
else
p->next_line = p->var.xres_virtual>>3;
p->next_plane = 0;
MOD_INC_USE_COUNT;
return 0;
}
static void release_mfb(void)
{
MOD_DEC_USE_COUNT;
}
static void bmove_mfb(struct display *p, int sy, int sx, int dy, int dx,
int height, int width)
{
u_char *src, *dest;
u_int rows;
if (sx == 0 && dx == 0 && width == p->next_line) {
src = p->screen_base+sy*p->fontheight*width;
dest = p->screen_base+dy*p->fontheight*width;
mymemmove(dest, src, height*p->fontheight*width);
} else if (dy <= sy) {
src = p->screen_base+sy*p->fontheight*p->next_line+sx;
dest = p->screen_base+dy*p->fontheight*p->next_line+dx;
for (rows = height*p->fontheight; rows--;) {
mymemmove(dest, src, width);
src += p->next_line;
dest += p->next_line;
}
} else {
src = p->screen_base+((sy+height)*p->fontheight-1)*p->next_line+sx;
dest = p->screen_base+((dy+height)*p->fontheight-1)*p->next_line+dx;
for (rows = height*p->fontheight; rows--;) {
mymemmove(dest, src, width);
src -= p->next_line;
dest -= p->next_line;
}
}
}
static void clear_mfb(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width)
{
u_char *dest;
u_int rows;
dest = p->screen_base+sy*p->fontheight*p->next_line+sx;
if (sx == 0 && width == p->next_line) {
if (attr_reverse(p,conp))
mymemset(dest, height*p->fontheight*width);
else
mymemclear(dest, height*p->fontheight*width);
} else
for (rows = height*p->fontheight; rows--; dest += p->next_line)
if (attr_reverse(p,conp))
mymemset(dest, width);
else
mymemclear_small(dest, width);
}
static void putc_mfb(struct vc_data *conp, struct display *p, int c, int yy,
int xx)
{
u_char *dest, *cdat;
u_int rows, bold, revs, underl;
u_char d;
c &= 0xff;
dest = p->screen_base+yy*p->fontheight*p->next_line+xx;
cdat = p->fontdata+c*p->fontheight;
bold = attr_bold(p,conp);
revs = attr_reverse(p,conp);
underl = attr_underline(p,conp);
for (rows = p->fontheight; rows--; dest += p->next_line) {
d = *cdat++;
if (underl && !rows)
d = 0xff;
else if (bold)
d |= d>>1;
if (revs)
d = ~d;
*dest = d;
}
}
static void putcs_mfb(struct vc_data *conp, struct display *p, const char *s,
int count, int yy, int xx)
{
u_char *dest, *dest0, *cdat;
u_int rows, bold, revs, underl;
u_char c, d;
dest0 = p->screen_base+yy*p->fontheight*p->next_line+xx;
bold = attr_bold(p,conp);
revs = attr_reverse(p,conp);
underl = attr_underline(p,conp);
while (count--) {
c = *s++;
dest = dest0++;
cdat = p->fontdata+c*p->fontheight;
for (rows = p->fontheight; rows--; dest += p->next_line) {
d = *cdat++;
if (underl && !rows)
d = 0xff;
else if (bold)
d |= d>>1;
if (revs)
d = ~d;
*dest = d;
}
}
}
static void rev_char_mfb(struct display *p, int xx, int yy)
{
u_char *dest;
u_int rows;
dest = p->screen_base+yy*p->fontheight*p->next_line+xx;
for (rows = p->fontheight; rows--; dest += p->next_line)
*dest = ~*dest;
}
#ifdef MODULE
int init_module(void)
#else
int fbcon_init_mfb(void)
#endif
{
return(fbcon_register_driver(&dispsw_mfb, 0));
}
#ifdef MODULE
void cleanup_module(void)
{
fbcon_unregister_driver(&dispsw_mfb);
}
#endif /* MODULE */
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