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NetBSD/sys/dev/rasops/rasops_bitops.h

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/* $NetBSD: rasops_bitops.h,v 1.12 2010/04/08 16:45:53 macallan Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Doran.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RASOPS_BITOPS_H_
#define _RASOPS_BITOPS_H_ 1
/*
* Erase columns.
*/
static void
NAME(erasecols)(void *cookie, int row, int col, int num, long attr)
{
int lmask, rmask, lclr, rclr, clr;
struct rasops_info *ri;
int32_t *dp, *rp, *hrp = NULL, *hp = NULL, tmp;
int height, cnt;
ri = (struct rasops_info *)cookie;
#ifdef RASOPS_CLIPPING
if ((unsigned)row >= (unsigned)ri->ri_rows)
return;
if (col < 0) {
num += col;
col = 0;
}
if ((col + num) > ri->ri_cols)
num = ri->ri_cols - col;
if (num <= 0)
return;
#endif
col *= ri->ri_font->fontwidth << PIXEL_SHIFT;
num *= ri->ri_font->fontwidth << PIXEL_SHIFT;
height = ri->ri_font->fontheight;
clr = ri->ri_devcmap[(attr >> 16) & 0xf];
rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + ((col >> 3) & ~3));
if (ri->ri_hwbits)
hrp = (int32_t *)(ri->ri_hwbits + row*ri->ri_yscale +
((col >> 3) & ~3));
if ((col & 31) + num <= 32) {
lmask = ~rasops_pmask[col & 31][num];
lclr = clr & ~lmask;
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
tmp = (*dp & lmask) | lclr;
*dp = tmp;
if (ri->ri_hwbits) {
*hrp = tmp;
DELTA(hrp, ri->ri_stride, int32_t *);
}
}
} else {
lmask = rasops_rmask[col & 31];
rmask = rasops_lmask[(col + num) & 31];
if (lmask)
num = (num - (32 - (col & 31))) >> 5;
else
num = num >> 5;
lclr = clr & ~lmask;
rclr = clr & ~rmask;
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
if (ri->ri_hwbits) {
hp = hrp;
DELTA(hrp, ri->ri_stride, int32_t *);
}
if (lmask) {
tmp = (*dp & lmask) | lclr;
*dp = tmp;
dp++;
if (ri->ri_hwbits) {
*hp = tmp;
hp++;
}
}
for (cnt = num; cnt > 0; cnt--)
*dp++ = clr;
if (ri->ri_hwbits) {
for (cnt = num; cnt > 0; cnt--)
*hp++ = clr;
}
if (rmask) {
tmp = (*dp & rmask) | rclr;
*dp = tmp;
if (ri->ri_hwbits)
*hp = tmp;
}
}
}
}
/*
* Actually paint the cursor.
*/
static void
NAME(do_cursor)(struct rasops_info *ri)
{
int lmask, rmask, height, row, col, num;
int32_t *dp, *rp, *hp = NULL, *hrp = NULL, tmp;
row = ri->ri_crow;
col = ri->ri_ccol * ri->ri_font->fontwidth << PIXEL_SHIFT;
height = ri->ri_font->fontheight;
num = ri->ri_font->fontwidth << PIXEL_SHIFT;
rp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale + ((col >> 3) & ~3));
if (ri->ri_hwbits)
hrp = (int32_t *)(ri->ri_hwbits + row * ri->ri_yscale +
((col >> 3) & ~3));
if ((col & 31) + num <= 32) {
lmask = rasops_pmask[col & 31][num];
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
*dp ^= lmask;
}
if (ri->ri_hwbits) {
height = ri->ri_font->fontheight;
while (height--) {
hp = hrp;
DELTA(hrp, ri->ri_stride, int32_t *);
*hp ^= lmask;
}
}
} else {
lmask = ~rasops_rmask[col & 31];
rmask = ~rasops_lmask[(col + num) & 31];
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
if (ri->ri_hwbits) {
hp = hrp;
DELTA(hrp, ri->ri_stride, int32_t *);
}
if (lmask != -1) {
tmp = *dp ^ lmask;
*dp = tmp;
dp++;
if (ri->ri_hwbits) {
*hp = tmp;
hp++;
}
}
if (rmask != -1) {
tmp = *dp ^ rmask;
*dp = tmp;
if (ri->ri_hwbits)
*hp = tmp;
}
}
}
}
/*
* Copy columns. Ick!
*/
static void
NAME(copycols)(void *cookie, int row, int src, int dst, int num)
{
int tmp, lmask, rmask, height, lnum, rnum, sb, db, cnt, full;
int32_t *sp, *dp, *srp, *drp, *dhp = NULL, *hp = NULL;
struct rasops_info *ri;
sp = NULL; /* XXX gcc */
ri = (struct rasops_info *)cookie;
#ifdef RASOPS_CLIPPING
if (dst == src)
return;
/* Catches < 0 case too */
if ((unsigned)row >= (unsigned)ri->ri_rows)
return;
if (src < 0) {
num += src;
src = 0;
}
if ((src + num) > ri->ri_cols)
num = ri->ri_cols - src;
if (dst < 0) {
num += dst;
dst = 0;
}
if ((dst + num) > ri->ri_cols)
num = ri->ri_cols - dst;
if (num <= 0)
return;
#endif
cnt = ri->ri_font->fontwidth << PIXEL_SHIFT;
src *= cnt;
dst *= cnt;
num *= cnt;
row *= ri->ri_yscale;
height = ri->ri_font->fontheight;
db = dst & 31;
if (db + num <= 32) {
/* Destination is contained within a single word */
srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
if (ri->ri_hwbits)
dhp = (int32_t *)(ri->ri_hwbits + row +
((dst >> 3) & ~3));
sb = src & 31;
while (height--) {
GETBITS(srp, sb, num, tmp);
PUTBITS(tmp, db, num, drp);
if (ri->ri_hwbits) {
PUTBITS(tmp, db, num, dhp);
DELTA(dhp, ri->ri_stride, int32_t *);
}
DELTA(srp, ri->ri_stride, int32_t *);
DELTA(drp, ri->ri_stride, int32_t *);
}
return;
}
lmask = rasops_rmask[db];
rmask = rasops_lmask[(dst + num) & 31];
lnum = (32 - db) & 31;
rnum = (dst + num) & 31;
if (lmask)
full = (num - (32 - (dst & 31))) >> 5;
else
full = num >> 5;
if (src < dst && src + num > dst) {
/* Copy right-to-left */
sb = src & 31;
src = src + num;
dst = dst + num;
srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
if (ri->ri_hwbits)
dhp = (int32_t *)(ri->ri_hwbits + row +
((dst >> 3) & ~3));
src = src & 31;
rnum = 32 - lnum;
db = dst & 31;
if ((src -= db) < 0) {
sp--;
src += 32;
}
while (height--) {
sp = srp;
dp = drp;
if (ri->ri_hwbits) {
hp = dhp;
DELTA(dhp, ri->ri_stride, int32_t *);
}
DELTA(srp, ri->ri_stride, int32_t *);
DELTA(drp, ri->ri_stride, int32_t *);
if (db) {
GETBITS(sp, src, db, tmp);
PUTBITS(tmp, 0, db, dp);
if (ri->ri_hwbits) {
PUTBITS(tmp, 0, db, hp);
hp++;
}
dp--;
sp--;
}
/* Now aligned to 32-bits wrt dp */
for (cnt = full; cnt; cnt--, sp--) {
GETBITS(sp, src, 32, tmp);
*dp-- = tmp;
if (ri->ri_hwbits)
*hp-- = tmp;
}
if (lmask) {
#if 0
if (src > sb)
sp++;
#endif
GETBITS(sp, sb, lnum, tmp);
PUTBITS(tmp, rnum, lnum, dp);
if (ri->ri_hwbits)
PUTBITS(tmp, rnum, lnum, hp);
}
}
} else {
/* Copy left-to-right */
srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
if (ri->ri_hwbits)
dhp = (int32_t *)(ri->ri_hwbits + row +
((dst >> 3) & ~3));
db = dst & 31;
while (height--) {
sb = src & 31;
sp = srp;
dp = drp;
if (ri->ri_hwbits) {
hp = dhp;
DELTA(dhp, ri->ri_stride, int32_t *);
}
DELTA(srp, ri->ri_stride, int32_t *);
DELTA(drp, ri->ri_stride, int32_t *);
if (lmask) {
GETBITS(sp, sb, lnum, tmp);
PUTBITS(tmp, db, lnum, dp);
dp++;
if (ri->ri_hwbits) {
PUTBITS(tmp, db, lnum, hp);
hp++;
}
if ((sb += lnum) > 31) {
sp++;
sb -= 32;
}
}
/* Now aligned to 32-bits wrt dp */
for (cnt = full; cnt; cnt--, sp++) {
GETBITS(sp, sb, 32, tmp);
*dp++ = tmp;
if (ri->ri_hwbits)
*hp++ = tmp;
}
if (rmask) {
GETBITS(sp, sb, rnum, tmp);
PUTBITS(tmp, 0, rnum, dp);
if (ri->ri_hwbits)
PUTBITS(tmp, 0, rnum, hp);
}
}
}
}
#endif /* _RASOPS_BITOPS_H_ */
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