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/*
* linux/drivers/video/cfb16.c -- Low level frame buffer operations for 16 bpp
* truecolor packed pixels
*
* 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"
#include "fbcon-cfb16.h"
/*
* 16 bpp packed pixels
*/
u16 fbcon_cfb16_cmap[16];
static u32 tab_cfb16[] = {
#if defined(__BIG_ENDIAN)
0x00000000, 0x0000ffff, 0xffff0000, 0xffffffff
#elif defined(__LITTLE_ENDIAN)
0x00000000, 0xffff0000, 0x0000ffff, 0xffffffff
#else
#error FIXME: No endianness??
#endif
};
void fbcon_cfb16_setup(struct display *p)
{
p->next_line = p->var.xres_virtual<<1;
p->next_plane = 0;
}
void fbcon_cfb16_bmove(struct display *p, int sy, int sx, int dy, int dx,
int height, int width)
{
int bytes = p->next_line, linesize = bytes * p->fontheight, rows;
u8 *src, *dst;
if (sx == 0 && dx == 0 && width * 16 == bytes)
mymemmove(p->screen_base + dy * linesize,
p->screen_base + sy * linesize,
height * linesize);
else if (dy < sy || (dy == sy && dx < sx)) {
src = p->screen_base + sy * linesize + sx * 16;
dst = p->screen_base + dy * linesize + dx * 16;
for (rows = height * p->fontheight ; rows-- ;) {
mymemmove(dst, src, width * 16);
src += bytes;
dst += bytes;
}
} else {
src = p->screen_base + (sy+height) * linesize + sx * 16 - bytes;
dst = p->screen_base + (dy+height) * linesize + dx * 16 - bytes;
for (rows = height * p->fontheight ; rows-- ;) {
mymemmove(dst, src, width * 16);
src -= bytes;
dst -= bytes;
}
}
}
void fbcon_cfb16_clear(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width)
{
u8 *dest0, *dest;
int bytes = p->next_line, lines = height * p->fontheight, rows, i;
u32 bgx;
dest = p->screen_base + sy * p->fontheight * bytes + sx * 16;
bgx = fbcon_cfb16_cmap[attr_bgcol_ec(p, conp)];
bgx |= (bgx << 16);
if (sx == 0 && width * 16 == bytes)
for (i = 0 ; i < lines * width ; i++) {
((u32 *)dest)[0] = bgx;
((u32 *)dest)[1] = bgx;
((u32 *)dest)[2] = bgx;
((u32 *)dest)[3] = bgx;
dest += 16;
}
else {
dest0 = dest;
for (rows = lines; rows-- ; dest0 += bytes) {
dest = dest0;
for (i = 0 ; i < width ; i++) {
((u32 *)dest)[0] = bgx;
((u32 *)dest)[1] = bgx;
((u32 *)dest)[2] = bgx;
((u32 *)dest)[3] = bgx;
dest += 16;
}
}
}
}
void fbcon_cfb16_putc(struct vc_data *conp, struct display *p, int c, int yy,
int xx)
{
u8 *dest, *cdat;
int bytes = p->next_line, rows;
u32 eorx, fgx, bgx;
c &= 0xff;
dest = p->screen_base + yy * p->fontheight * bytes + xx * 16;
cdat = p->fontdata + c * p->fontheight;
fgx = fbcon_cfb16_cmap[attr_fgcol(p, conp)];
bgx = fbcon_cfb16_cmap[attr_bgcol(p, conp)];
fgx |= (fgx << 16);
bgx |= (bgx << 16);
eorx = fgx ^ bgx;
for (rows = p->fontheight ; rows-- ; dest += bytes) {
u8 bits = *cdat++;
((u32 *)dest)[0] = (tab_cfb16[bits >> 6] & eorx) ^ bgx;
((u32 *)dest)[1] = (tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx;
((u32 *)dest)[2] = (tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *)dest)[3] = (tab_cfb16[bits & 3] & eorx) ^ bgx;
}
}
void fbcon_cfb16_putcs(struct vc_data *conp, struct display *p, const char *s,
int count, int yy, int xx)
{
u8 *cdat, c, *dest, *dest0;
int rows, bytes = p->next_line;
u32 eorx, fgx, bgx;
dest0 = p->screen_base + yy * p->fontheight * bytes + xx * 16;
fgx = fbcon_cfb16_cmap[attr_fgcol(p, conp)];
bgx = fbcon_cfb16_cmap[attr_bgcol(p, conp)];
fgx |= (fgx << 16);
bgx |= (bgx << 16);
eorx = fgx ^ bgx;
while (count--) {
c = *s++;
cdat = p->fontdata + c * p->fontheight;
for (rows = p->fontheight, dest = dest0; rows-- ; dest += bytes) {
u8 bits = *cdat++;
((u32 *)dest)[0] = (tab_cfb16[bits >> 6] & eorx) ^ bgx;
((u32 *)dest)[1] = (tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx;
((u32 *)dest)[2] = (tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *)dest)[3] = (tab_cfb16[bits & 3] & eorx) ^ bgx;
}
dest0 += 16;
}
}
void fbcon_cfb16_revc(struct display *p, int xx, int yy)
{
u8 *dest;
int bytes = p->next_line, rows;
dest = p->screen_base + yy * p->fontheight * bytes + xx * 16;
for (rows = p->fontheight ; rows-- ; dest += bytes) {
((u32 *)dest)[0] ^= 0xffffffff;
((u32 *)dest)[1] ^= 0xffffffff;
((u32 *)dest)[2] ^= 0xffffffff;
((u32 *)dest)[3] ^= 0xffffffff;
}
}
/*
* `switch' for the low level operations
*/
struct display_switch fbcon_cfb16 = {
fbcon_cfb16_setup, fbcon_cfb16_bmove, fbcon_cfb16_clear, fbcon_cfb16_putc,
fbcon_cfb16_putcs, fbcon_cfb16_revc
};
/*
* Visible symbols for modules
*/
EXPORT_SYMBOL(fbcon_cfb16);
EXPORT_SYMBOL(fbcon_cfb16_setup);
EXPORT_SYMBOL(fbcon_cfb16_bmove);
EXPORT_SYMBOL(fbcon_cfb16_clear);
EXPORT_SYMBOL(fbcon_cfb16_putc);
EXPORT_SYMBOL(fbcon_cfb16_putcs);
EXPORT_SYMBOL(fbcon_cfb16_revc);
EXPORT_SYMBOL(fbcon_cfb16_cmap);
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