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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/fb.h>
#include <video/fbcon.h>
#include <video/fbcon-mfb.h>
/*
* Monochrome
*/
void fbcon_mfb_setup(struct display *p)
{
if (p->line_length)
p->next_line = p->line_length;
else
p->next_line = p->var.xres_virtual>>3;
p->next_plane = 0;
}
void fbcon_mfb_bmove(struct display *p, int sy, int sx, int dy, int dx,
int height, int width)
{
u8 *src, *dest;
u_int rows;
if (sx == 0 && dx == 0 && width == p->next_line) {
src = p->screen_base+sy*fontheight(p)*width;
dest = p->screen_base+dy*fontheight(p)*width;
mymemmove(dest, src, height*fontheight(p)*width);
} else if (dy <= sy) {
src = p->screen_base+sy*fontheight(p)*p->next_line+sx;
dest = p->screen_base+dy*fontheight(p)*p->next_line+dx;
for (rows = height*fontheight(p); rows--;) {
mymemmove(dest, src, width);
src += p->next_line;
dest += p->next_line;
}
} else {
src = p->screen_base+((sy+height)*fontheight(p)-1)*p->next_line+sx;
dest = p->screen_base+((dy+height)*fontheight(p)-1)*p->next_line+dx;
for (rows = height*fontheight(p); rows--;) {
mymemmove(dest, src, width);
src -= p->next_line;
dest -= p->next_line;
}
}
}
void fbcon_mfb_clear(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width)
{
u8 *dest;
u_int rows;
int inverse = conp ? attr_reverse(p,conp->vc_video_erase_char) : 0;
dest = p->screen_base+sy*fontheight(p)*p->next_line+sx;
if (sx == 0 && width == p->next_line) {
if (inverse)
mymemset(dest, height*fontheight(p)*width);
else
mymemclear(dest, height*fontheight(p)*width);
} else
for (rows = height*fontheight(p); rows--; dest += p->next_line)
if (inverse)
mymemset(dest, width);
else
mymemclear_small(dest, width);
}
void fbcon_mfb_putc(struct vc_data *conp, struct display *p, int c, int yy,
int xx)
{
u8 *dest, *cdat;
u_int rows, bold, revs, underl;
u8 d;
dest = p->screen_base+yy*fontheight(p)*p->next_line+xx;
cdat = p->fontdata+(c&p->charmask)*fontheight(p);
bold = attr_bold(p,c);
revs = attr_reverse(p,c);
underl = attr_underline(p,c);
for (rows = fontheight(p); rows--; dest += p->next_line) {
d = *cdat++;
if (underl && !rows)
d = 0xff;
else if (bold)
d |= d>>1;
if (revs)
d = ~d;
*dest = d;
}
}
void fbcon_mfb_putcs(struct vc_data *conp, struct display *p,
const unsigned short *s, int count, int yy, int xx)
{
u8 *dest, *dest0, *cdat;
u_int rows, bold, revs, underl;
u8 d;
u16 c;
dest0 = p->screen_base+yy*fontheight(p)*p->next_line+xx;
bold = attr_bold(p,scr_readw(s));
revs = attr_reverse(p,scr_readw(s));
underl = attr_underline(p,scr_readw(s));
while (count--) {
c = scr_readw(s++) & p->charmask;
dest = dest0++;
cdat = p->fontdata+c*fontheight(p);
for (rows = fontheight(p); rows--; dest += p->next_line) {
d = *cdat++;
if (underl && !rows)
d = 0xff;
else if (bold)
d |= d>>1;
if (revs)
d = ~d;
*dest = d;
}
}
}
void fbcon_mfb_revc(struct display *p, int xx, int yy)
{
u8 *dest;
u_int rows;
dest = p->screen_base+yy*fontheight(p)*p->next_line+xx;
for (rows = fontheight(p); rows--; dest += p->next_line)
*dest = ~*dest;
}
void fbcon_mfb_clear_margins(struct vc_data *conp, struct display *p,
int bottom_only)
{
u8 *dest;
int height, bottom;
int inverse = conp ? attr_reverse(p,conp->vc_video_erase_char) : 0;
/* XXX Need to handle right margin? */
height = p->var.yres - conp->vc_rows * fontheight(p);
if (!height)
return;
bottom = conp->vc_rows + p->yscroll;
if (bottom >= p->vrows)
bottom -= p->vrows;
dest = p->screen_base + bottom * fontheight(p) * p->next_line;
if (inverse)
mymemset(dest, height * p->next_line);
else
mymemclear(dest, height * p->next_line);
}
/*
* `switch' for the low level operations
*/
struct display_switch fbcon_mfb = {
fbcon_mfb_setup, fbcon_mfb_bmove, fbcon_mfb_clear, fbcon_mfb_putc,
fbcon_mfb_putcs, fbcon_mfb_revc, NULL, NULL, fbcon_mfb_clear_margins,
FONTWIDTH(8)
};
#ifdef MODULE
int init_module(void)
{
return 0;
}
void cleanup_module(void)
{}
#endif /* MODULE */
/*
* Visible symbols for modules
*/
EXPORT_SYMBOL(fbcon_mfb);
EXPORT_SYMBOL(fbcon_mfb_setup);
EXPORT_SYMBOL(fbcon_mfb_bmove);
EXPORT_SYMBOL(fbcon_mfb_clear);
EXPORT_SYMBOL(fbcon_mfb_putc);
EXPORT_SYMBOL(fbcon_mfb_putcs);
EXPORT_SYMBOL(fbcon_mfb_revc);
EXPORT_SYMBOL(fbcon_mfb_clear_margins);
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