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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/fb.h>
#include <video/fbcon.h>
#include <video/fbcon-cfb16.h>
/*
* 16 bpp packed pixels
*/
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->line_length ? p->line_length : 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 * fontheight(p), rows;
u8 *src, *dst;
if (sx == 0 && dx == 0 && width * fontwidth(p) * 2 == bytes) {
mymemmove(p->screen_base + dy * linesize,
p->screen_base + sy * linesize,
height * linesize);
return;
}
if (fontwidthlog(p)) {
sx <<= fontwidthlog(p)+1;
dx <<= fontwidthlog(p)+1;
width <<= fontwidthlog(p)+1;
} else {
sx *= fontwidth(p)*2;
dx *= fontwidth(p)*2;
width *= fontwidth(p)*2;
}
if (dy < sy || (dy == sy && dx < sx)) {
src = p->screen_base + sy * linesize + sx;
dst = p->screen_base + dy * linesize + dx;
for (rows = height * fontheight(p); rows--;) {
mymemmove(dst, src, width);
src += bytes;
dst += bytes;
}
} else {
src = p->screen_base + (sy+height) * linesize + sx - bytes;
dst = p->screen_base + (dy+height) * linesize + dx - bytes;
for (rows = height * fontheight(p); rows--;) {
mymemmove(dst, src, width);
src -= bytes;
dst -= bytes;
}
}
}
static inline void rectfill(u8 *dest, int width, int height, u32 data,
int linesize)
{
int i;
data |= data<<16;
while (height-- > 0) {
u32 *p = (u32 *)dest;
for (i = 0; i < width/4; i++) {
*p++ = data;
*p++ = data;
}
if (width & 2)
*p++ = data;
if (width & 1)
*(u16 *)p = data;
dest += linesize;
}
}
void fbcon_cfb16_clear(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width)
{
u8 *dest;
int bytes = p->next_line, lines = height * fontheight(p);
u32 bgx;
dest = p->screen_base + sy * fontheight(p) * bytes + sx * fontwidth(p) * 2;
bgx = ((u16 *)p->dispsw_data)[attr_bgcol_ec(p, conp)];
width *= fontwidth(p)/4;
if (width * 8 == bytes)
rectfill(dest, lines * width * 4, 1, bgx, bytes);
else
rectfill(dest, width * 4, lines, bgx, bytes);
}
void fbcon_cfb16_putc(struct vc_data *conp, struct display *p, int c, int yy,
int xx)
{
u8 *dest, *cdat, bits;
int bytes = p->next_line, rows;
u32 eorx, fgx, bgx;
dest = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 2;
fgx = ((u16 *)p->dispsw_data)[attr_fgcol(p, c)];
bgx = ((u16 *)p->dispsw_data)[attr_bgcol(p, c)];
fgx |= (fgx << 16);
bgx |= (bgx << 16);
eorx = fgx ^ bgx;
switch (fontwidth(p)) {
case 4:
case 8:
cdat = p->fontdata + (c & p->charmask) * fontheight(p);
for (rows = fontheight(p); rows--; dest += bytes) {
bits = *cdat++;
((u32 *)dest)[0] = (tab_cfb16[bits >> 6] & eorx) ^ bgx;
((u32 *)dest)[1] = (tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx;
if (fontwidth(p) == 8) {
((u32 *)dest)[2] = (tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *)dest)[3] = (tab_cfb16[bits & 3] & eorx) ^ bgx;
}
}
break;
case 12:
case 16:
cdat = p->fontdata + ((c & p->charmask) * fontheight(p) << 1);
for (rows = fontheight(p); rows--; dest += bytes) {
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;
bits = *cdat++;
((u32 *)dest)[4] = (tab_cfb16[bits >> 6] & eorx) ^ bgx;
((u32 *)dest)[5] = (tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx;
if (fontwidth(p) == 16) {
((u32 *)dest)[6] = (tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *)dest)[7] = (tab_cfb16[bits & 3] & eorx) ^ bgx;
}
}
break;
}
}
void fbcon_cfb16_putcs(struct vc_data *conp, struct display *p,
const unsigned short *s, int count, int yy, int xx)
{
u8 *cdat, *dest, *dest0;
u16 c;
int rows, bytes = p->next_line;
u32 eorx, fgx, bgx;
dest0 = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p) * 2;
fgx = ((u16 *)p->dispsw_data)[attr_fgcol(p, *s)];
bgx = ((u16 *)p->dispsw_data)[attr_bgcol(p, *s)];
fgx |= (fgx << 16);
bgx |= (bgx << 16);
eorx = fgx ^ bgx;
switch (fontwidth(p)) {
case 4:
case 8:
while (count--) {
c = *s++ & p->charmask;
cdat = p->fontdata + c * fontheight(p);
for (rows = fontheight(p), 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;
if (fontwidth(p) == 8) {
((u32 *)dest)[2] = (tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *)dest)[3] = (tab_cfb16[bits & 3] & eorx) ^ bgx;
}
}
dest0 += fontwidth(p)*2;;
}
break;
case 12:
case 16:
while (count--) {
c = *s++ & p->charmask;
cdat = p->fontdata + (c * fontheight(p) << 1);
for (rows = fontheight(p), 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;
bits = *cdat++;
((u32 *)dest)[4] = (tab_cfb16[bits >> 6] & eorx) ^ bgx;
((u32 *)dest)[5] = (tab_cfb16[bits >> 4 & 3] & eorx) ^ bgx;
if (fontwidth(p) == 16) {
((u32 *)dest)[6] = (tab_cfb16[bits >> 2 & 3] & eorx) ^ bgx;
((u32 *)dest)[7] = (tab_cfb16[bits & 3] & eorx) ^ bgx;
}
}
dest0 += fontwidth(p)*2;
}
break;
}
}
void fbcon_cfb16_revc(struct display *p, int xx, int yy)
{
u8 *dest;
int bytes = p->next_line, rows;
dest = p->screen_base + yy * fontheight(p) * bytes + xx * fontwidth(p)*2;
for (rows = fontheight(p); rows--; dest += bytes) {
switch (fontwidth(p)) {
case 16:
((u32 *)dest)[6] ^= 0xffffffff; ((u32 *)dest)[7] ^= 0xffffffff;
/* FALL THROUGH */
case 12:
((u32 *)dest)[4] ^= 0xffffffff; ((u32 *)dest)[5] ^= 0xffffffff;
/* FALL THROUGH */
case 8:
((u32 *)dest)[2] ^= 0xffffffff; ((u32 *)dest)[3] ^= 0xffffffff;
/* FALL THROUGH */
case 4:
((u32 *)dest)[0] ^= 0xffffffff; ((u32 *)dest)[1] ^= 0xffffffff;
}
}
}
void fbcon_cfb16_clear_margins(struct vc_data *conp, struct display *p,
int bottom_only)
{
int bytes = p->next_line;
u32 bgx;
unsigned int right_start = conp->vc_cols*fontwidth(p);
unsigned int bottom_start = conp->vc_rows*fontheight(p);
unsigned int right_width, bottom_width;
bgx = ((u16 *)p->dispsw_data)[attr_bgcol_ec(p, conp)];
if (!bottom_only && (right_width = p->var.xres-right_start))
rectfill(p->screen_base+right_start*2, right_width,
p->var.yres_virtual, bgx, bytes);
if ((bottom_width = p->var.yres-bottom_start))
rectfill(p->screen_base+(p->var.yoffset+bottom_start)*bytes,
right_start, bottom_width, bgx, bytes);
}
/*
* `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, NULL, NULL, fbcon_cfb16_clear_margins,
FONTWIDTH(4)|FONTWIDTH(8)|FONTWIDTH(12)|FONTWIDTH(16)
};
#ifdef MODULE
int init_module(void)
{
return 0;
}
void cleanup_module(void)
{}
#endif /* MODULE */
/*
* 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_clear_margins);
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