346 lines
8.2 KiB
C
346 lines
8.2 KiB
C
/*
|
|
* linux/drivers/video/iplan2p8.c -- Low level frame buffer operations for
|
|
* interleaved bitplanes à la Atari (8
|
|
* planes, 2 bytes interleave)
|
|
*
|
|
* 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/string.h>
|
|
#include <linux/fb.h>
|
|
|
|
#include <asm/setup.h>
|
|
|
|
#include "atafb.h"
|
|
|
|
#define BPL 8
|
|
#include "atafb_utils.h"
|
|
|
|
|
|
/* Copies a 8 plane column from 's', height 'h', to 'd'. */
|
|
|
|
/* This expands a 8 bit color into two longs for two movepl (8 plane)
|
|
* operations.
|
|
*/
|
|
|
|
void atafb_iplan2p8_copyarea(struct fb_info *info, u_long next_line,
|
|
int sy, int sx, int dy, int dx,
|
|
int height, int width)
|
|
{
|
|
/* bmove() has to distinguish two major cases: If both, source and
|
|
* destination, start at even addresses or both are at odd
|
|
* addresses, just the first odd and last even column (if present)
|
|
* require special treatment (memmove_col()). The rest between
|
|
* then can be copied by normal operations, because all adjacent
|
|
* bytes are affected and are to be stored in the same order.
|
|
* The pathological case is when the move should go from an odd
|
|
* address to an even or vice versa. Since the bytes in the plane
|
|
* words must be assembled in new order, it seems wisest to make
|
|
* all movements by memmove_col().
|
|
*/
|
|
|
|
u8 *src, *dst;
|
|
u32 *s, *d;
|
|
int w, l , i, j;
|
|
u_int colsize;
|
|
u_int upwards = (dy < sy) || (dy == sy && dx < sx);
|
|
|
|
colsize = height;
|
|
if (!((sx ^ dx) & 15)) {
|
|
/* odd->odd or even->even */
|
|
|
|
if (upwards) {
|
|
src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
|
|
dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
|
|
if (sx & 15) {
|
|
memmove32_col(dst, src, 0xff00ff, height, next_line - BPL * 2);
|
|
src += BPL * 2;
|
|
dst += BPL * 2;
|
|
width -= 8;
|
|
}
|
|
w = width >> 4;
|
|
if (w) {
|
|
s = (u32 *)src;
|
|
d = (u32 *)dst;
|
|
w *= BPL / 2;
|
|
l = next_line - w * 4;
|
|
for (j = height; j > 0; j--) {
|
|
for (i = w; i > 0; i--)
|
|
*d++ = *s++;
|
|
s = (u32 *)((u8 *)s + l);
|
|
d = (u32 *)((u8 *)d + l);
|
|
}
|
|
}
|
|
if (width & 15)
|
|
memmove32_col(dst + width / (8 / BPL), src + width / (8 / BPL),
|
|
0xff00ff00, height, next_line - BPL * 2);
|
|
} else {
|
|
src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
|
|
dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
|
|
|
|
if ((sx + width) & 15) {
|
|
src -= BPL * 2;
|
|
dst -= BPL * 2;
|
|
memmove32_col(dst, src, 0xff00ff00, colsize, -next_line - BPL * 2);
|
|
width -= 8;
|
|
}
|
|
w = width >> 4;
|
|
if (w) {
|
|
s = (u32 *)src;
|
|
d = (u32 *)dst;
|
|
w *= BPL / 2;
|
|
l = next_line - w * 4;
|
|
for (j = height; j > 0; j--) {
|
|
for (i = w; i > 0; i--)
|
|
*--d = *--s;
|
|
s = (u32 *)((u8 *)s - l);
|
|
d = (u32 *)((u8 *)d - l);
|
|
}
|
|
}
|
|
if (sx & 15)
|
|
memmove32_col(dst - (width - 16) / (8 / BPL),
|
|
src - (width - 16) / (8 / BPL),
|
|
0xff00ff, colsize, -next_line - BPL * 2);
|
|
}
|
|
} else {
|
|
/* odd->even or even->odd */
|
|
if (upwards) {
|
|
u32 *src32, *dst32;
|
|
u32 pval[4], v, v1, mask;
|
|
int i, j, w, f;
|
|
|
|
src = (u8 *)info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL);
|
|
dst = (u8 *)info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL);
|
|
|
|
mask = 0xff00ff00;
|
|
f = 0;
|
|
w = width;
|
|
if (sx & 15) {
|
|
f = 1;
|
|
w += 8;
|
|
}
|
|
if ((sx + width) & 15)
|
|
f |= 2;
|
|
w >>= 4;
|
|
for (i = height; i; i--) {
|
|
src32 = (u32 *)src;
|
|
dst32 = (u32 *)dst;
|
|
|
|
if (f & 1) {
|
|
pval[0] = (*src32++ << 8) & mask;
|
|
pval[1] = (*src32++ << 8) & mask;
|
|
pval[2] = (*src32++ << 8) & mask;
|
|
pval[3] = (*src32++ << 8) & mask;
|
|
} else {
|
|
pval[0] = dst32[0] & mask;
|
|
pval[1] = dst32[1] & mask;
|
|
pval[2] = dst32[2] & mask;
|
|
pval[3] = dst32[3] & mask;
|
|
}
|
|
|
|
for (j = w; j > 0; j--) {
|
|
v = *src32++;
|
|
v1 = v & mask;
|
|
*dst32++ = pval[0] | (v1 >> 8);
|
|
pval[0] = (v ^ v1) << 8;
|
|
v = *src32++;
|
|
v1 = v & mask;
|
|
*dst32++ = pval[1] | (v1 >> 8);
|
|
pval[1] = (v ^ v1) << 8;
|
|
v = *src32++;
|
|
v1 = v & mask;
|
|
*dst32++ = pval[2] | (v1 >> 8);
|
|
pval[2] = (v ^ v1) << 8;
|
|
v = *src32++;
|
|
v1 = v & mask;
|
|
*dst32++ = pval[3] | (v1 >> 8);
|
|
pval[3] = (v ^ v1) << 8;
|
|
}
|
|
|
|
if (f & 2) {
|
|
dst32[0] = (dst32[0] & mask) | pval[0];
|
|
dst32[1] = (dst32[1] & mask) | pval[1];
|
|
dst32[2] = (dst32[2] & mask) | pval[2];
|
|
dst32[3] = (dst32[3] & mask) | pval[3];
|
|
}
|
|
|
|
src += next_line;
|
|
dst += next_line;
|
|
}
|
|
} else {
|
|
u32 *src32, *dst32;
|
|
u32 pval[4], v, v1, mask;
|
|
int i, j, w, f;
|
|
|
|
src = (u8 *)info->screen_base + (sy - 1) * next_line + ((sx + width + 8) & ~15) / (8 / BPL);
|
|
dst = (u8 *)info->screen_base + (dy - 1) * next_line + ((dx + width + 8) & ~15) / (8 / BPL);
|
|
|
|
mask = 0xff00ff;
|
|
f = 0;
|
|
w = width;
|
|
if ((dx + width) & 15)
|
|
f = 1;
|
|
if (sx & 15) {
|
|
f |= 2;
|
|
w += 8;
|
|
}
|
|
w >>= 4;
|
|
for (i = height; i; i--) {
|
|
src32 = (u32 *)src;
|
|
dst32 = (u32 *)dst;
|
|
|
|
if (f & 1) {
|
|
pval[0] = dst32[-1] & mask;
|
|
pval[1] = dst32[-2] & mask;
|
|
pval[2] = dst32[-3] & mask;
|
|
pval[3] = dst32[-4] & mask;
|
|
} else {
|
|
pval[0] = (*--src32 >> 8) & mask;
|
|
pval[1] = (*--src32 >> 8) & mask;
|
|
pval[2] = (*--src32 >> 8) & mask;
|
|
pval[3] = (*--src32 >> 8) & mask;
|
|
}
|
|
|
|
for (j = w; j > 0; j--) {
|
|
v = *--src32;
|
|
v1 = v & mask;
|
|
*--dst32 = pval[0] | (v1 << 8);
|
|
pval[0] = (v ^ v1) >> 8;
|
|
v = *--src32;
|
|
v1 = v & mask;
|
|
*--dst32 = pval[1] | (v1 << 8);
|
|
pval[1] = (v ^ v1) >> 8;
|
|
v = *--src32;
|
|
v1 = v & mask;
|
|
*--dst32 = pval[2] | (v1 << 8);
|
|
pval[2] = (v ^ v1) >> 8;
|
|
v = *--src32;
|
|
v1 = v & mask;
|
|
*--dst32 = pval[3] | (v1 << 8);
|
|
pval[3] = (v ^ v1) >> 8;
|
|
}
|
|
|
|
if (!(f & 2)) {
|
|
dst32[-1] = (dst32[-1] & mask) | pval[0];
|
|
dst32[-2] = (dst32[-2] & mask) | pval[1];
|
|
dst32[-3] = (dst32[-3] & mask) | pval[2];
|
|
dst32[-4] = (dst32[-4] & mask) | pval[3];
|
|
}
|
|
|
|
src -= next_line;
|
|
dst -= next_line;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void atafb_iplan2p8_fillrect(struct fb_info *info, u_long next_line, u32 color,
|
|
int sy, int sx, int height, int width)
|
|
{
|
|
u32 *dest;
|
|
int rows, i;
|
|
u32 cval[4];
|
|
|
|
dest = (u32 *)(info->screen_base + sy * next_line + (sx & ~15) / (8 / BPL));
|
|
if (sx & 15) {
|
|
u8 *dest8 = (u8 *)dest + 1;
|
|
|
|
expand8_col2mask(color, cval);
|
|
|
|
for (i = height; i; i--) {
|
|
fill8_col(dest8, cval);
|
|
dest8 += next_line;
|
|
}
|
|
dest += BPL / 2;
|
|
width -= 8;
|
|
}
|
|
|
|
expand16_col2mask(color, cval);
|
|
rows = width >> 4;
|
|
if (rows) {
|
|
u32 *d = dest;
|
|
u32 off = next_line - rows * BPL * 2;
|
|
for (i = height; i; i--) {
|
|
d = fill16_col(d, rows, cval);
|
|
d = (u32 *)((long)d + off);
|
|
}
|
|
dest += rows * BPL / 2;
|
|
width &= 15;
|
|
}
|
|
|
|
if (width) {
|
|
u8 *dest8 = (u8 *)dest;
|
|
|
|
expand8_col2mask(color, cval);
|
|
|
|
for (i = height; i; i--) {
|
|
fill8_col(dest8, cval);
|
|
dest8 += next_line;
|
|
}
|
|
}
|
|
}
|
|
|
|
void atafb_iplan2p8_linefill(struct fb_info *info, u_long next_line,
|
|
int dy, int dx, u32 width,
|
|
const u8 *data, u32 bgcolor, u32 fgcolor)
|
|
{
|
|
u32 *dest;
|
|
const u16 *data16;
|
|
int rows;
|
|
u32 fgm[4], bgm[4], m;
|
|
|
|
dest = (u32 *)(info->screen_base + dy * next_line + (dx & ~15) / (8 / BPL));
|
|
if (dx & 15) {
|
|
fill8_2col((u8 *)dest + 1, fgcolor, bgcolor, *data++);
|
|
dest += BPL / 2;
|
|
width -= 8;
|
|
}
|
|
|
|
if (width >= 16) {
|
|
data16 = (const u16 *)data;
|
|
expand16_2col2mask(fgcolor, bgcolor, fgm, bgm);
|
|
|
|
for (rows = width / 16; rows; rows--) {
|
|
u16 d = *data16++;
|
|
m = d | ((u32)d << 16);
|
|
*dest++ = (m & fgm[0]) ^ bgm[0];
|
|
*dest++ = (m & fgm[1]) ^ bgm[1];
|
|
*dest++ = (m & fgm[2]) ^ bgm[2];
|
|
*dest++ = (m & fgm[3]) ^ bgm[3];
|
|
}
|
|
|
|
data = (const u8 *)data16;
|
|
width &= 15;
|
|
}
|
|
|
|
if (width)
|
|
fill8_2col((u8 *)dest, fgcolor, bgcolor, *data);
|
|
}
|
|
|
|
#ifdef MODULE
|
|
MODULE_LICENSE("GPL");
|
|
|
|
int init_module(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void cleanup_module(void)
|
|
{
|
|
}
|
|
#endif /* MODULE */
|
|
|
|
|
|
/*
|
|
* Visible symbols for modules
|
|
*/
|
|
|
|
EXPORT_SYMBOL(atafb_iplan2p8_copyarea);
|
|
EXPORT_SYMBOL(atafb_iplan2p8_fillrect);
|
|
EXPORT_SYMBOL(atafb_iplan2p8_linefill);
|