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NetBSD/sys/dev/rasops/rasops24.c

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/* $NetBSD: rasops24.c,v 1.28 2010/05/04 04:57:34 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.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: rasops24.c,v 1.28 2010/05/04 04:57:34 macallan Exp $");
#include "opt_rasops.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <machine/endian.h>
#include <sys/bswap.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/rasops/rasops.h>
static void rasops24_erasecols(void *, int, int, int, long);
static void rasops24_eraserows(void *, int, int, long);
static void rasops24_putchar(void *, int, int, u_int, long attr);
#ifndef RASOPS_SMALL
static void rasops24_putchar8(void *, int, int, u_int, long attr);
static void rasops24_putchar12(void *, int, int, u_int, long attr);
static void rasops24_putchar16(void *, int, int, u_int, long attr);
static void rasops24_makestamp(struct rasops_info *, long);
#endif
/*
* 4x1 stamp for optimized character blitting
*/
static int32_t stamp[64];
static long stamp_attr;
static int stamp_mutex; /* XXX see note in readme */
/*
* XXX this confuses the hell out of gcc2 (not egcs) which always insists
* that the shift count is negative.
*
* offset = STAMP_SHIFT(fontbits, nibble #) & STAMP_MASK
* destination int32_t[0] = STAMP_READ(offset)
* destination int32_t[1] = STAMP_READ(offset + 4)
* destination int32_t[2] = STAMP_READ(offset + 8)
*/
#define STAMP_SHIFT(fb,n) ((n*4-4) >= 0 ? (fb)>>(n*4-4):(fb)<<-(n*4-4))
#define STAMP_MASK (0xf << 4)
#define STAMP_READ(o) (*(int32_t *)((char *)stamp + (o)))
/*
* Initialize rasops_info struct for this colordepth.
*/
void
rasops24_init(struct rasops_info *ri)
{
switch (ri->ri_font->fontwidth) {
#ifndef RASOPS_SMALL
case 8:
ri->ri_ops.putchar = rasops24_putchar8;
break;
case 12:
ri->ri_ops.putchar = rasops24_putchar12;
break;
case 16:
ri->ri_ops.putchar = rasops24_putchar16;
break;
#endif
default:
ri->ri_ops.putchar = rasops24_putchar;
break;
}
if (ri->ri_rnum == 0) {
ri->ri_rnum = 8;
ri->ri_rpos = 0;
ri->ri_gnum = 8;
ri->ri_gpos = 8;
ri->ri_bnum = 8;
ri->ri_bpos = 16;
}
ri->ri_ops.erasecols = rasops24_erasecols;
ri->ri_ops.eraserows = rasops24_eraserows;
}
/*
* Put a single character. This is the generic version.
* XXX this bites - we should use masks.
*/
static void
rasops24_putchar(void *cookie, int row, int col, u_int uc, long attr)
{
int fb, width, height, cnt, clr[2];
struct rasops_info *ri = (struct rasops_info *)cookie;
struct wsdisplay_font *font = PICK_FONT(ri, uc);
u_char *dp, *rp, *fr;
#ifdef RASOPS_CLIPPING
/* Catches 'row < 0' case too */
if ((unsigned)row >= (unsigned)ri->ri_rows)
return;
if ((unsigned)col >= (unsigned)ri->ri_cols)
return;
#endif
rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
height = font->fontheight;
width = font->fontwidth;
clr[1] = ri->ri_devcmap[((u_int)attr >> 24) & 0xf];
clr[0] = ri->ri_devcmap[((u_int)attr >> 16) & 0xf];
if (uc == ' ') {
u_char c = clr[0];
while (height--) {
dp = rp;
rp += ri->ri_stride;
for (cnt = width; cnt; cnt--) {
*dp++ = c >> 16;
*dp++ = c >> 8;
*dp++ = c;
}
}
} else {
uc -= font->firstchar;
fr = (u_char *)font->data + uc * ri->ri_fontscale;
while (height--) {
dp = rp;
fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) |
(fr[0] << 24);
fr += font->stride;
rp += ri->ri_stride;
for (cnt = width; cnt; cnt--, fb <<= 1) {
if ((fb >> 31) & 1) {
*dp++ = clr[1] >> 16;
*dp++ = clr[1] >> 8;
*dp++ = clr[1];
} else {
*dp++ = clr[0] >> 16;
*dp++ = clr[0] >> 8;
*dp++ = clr[0];
}
}
}
}
/* Do underline */
if ((attr & 1) != 0) {
u_char c = clr[1];
rp -= ri->ri_stride << 1;
while (width--) {
*rp++ = c >> 16;
*rp++ = c >> 8;
*rp++ = c;
}
}
}
#ifndef RASOPS_SMALL
/*
* Recompute the blitting stamp.
*/
static void
rasops24_makestamp(struct rasops_info *ri, long attr)
{
u_int fg, bg, c1, c2, c3, c4;
int i;
fg = ri->ri_devcmap[((u_int)attr >> 24) & 0xf] & 0xffffff;
bg = ri->ri_devcmap[((u_int)attr >> 16) & 0xf] & 0xffffff;
stamp_attr = attr;
for (i = 0; i < 64; i += 4) {
#if BYTE_ORDER == LITTLE_ENDIAN
c1 = (i & 32 ? fg : bg);
c2 = (i & 16 ? fg : bg);
c3 = (i & 8 ? fg : bg);
c4 = (i & 4 ? fg : bg);
#else
c1 = (i & 8 ? fg : bg);
c2 = (i & 4 ? fg : bg);
c3 = (i & 16 ? fg : bg);
c4 = (i & 32 ? fg : bg);
#endif
stamp[i+0] = (c1 << 8) | (c2 >> 16);
stamp[i+1] = (c2 << 16) | (c3 >> 8);
stamp[i+2] = (c3 << 24) | c4;
#if BYTE_ORDER == LITTLE_ENDIAN
if ((ri->ri_flg & RI_BSWAP) == 0) {
#else
if ((ri->ri_flg & RI_BSWAP) != 0) {
#endif
stamp[i+0] = bswap32(stamp[i+0]);
stamp[i+1] = bswap32(stamp[i+1]);
stamp[i+2] = bswap32(stamp[i+2]);
}
}
}
/*
* Put a single character. This is for 8-pixel wide fonts.
*/
static void
rasops24_putchar8(void *cookie, int row, int col, u_int uc, long attr)
{
struct rasops_info *ri = (struct rasops_info *)cookie;
struct wsdisplay_font *font = PICK_FONT(ri, uc);
int height, so, fs;
int32_t *rp;
u_char *fr;
/* Can't risk remaking the stamp if it's already in use */
if (stamp_mutex++) {
stamp_mutex--;
rasops24_putchar(cookie, row, col, uc, attr);
return;
}
#ifdef RASOPS_CLIPPING
if ((unsigned)row >= (unsigned)ri->ri_rows) {
stamp_mutex--;
return;
}
if ((unsigned)col >= (unsigned)ri->ri_cols) {
stamp_mutex--;
return;
}
#endif
/* Recompute stamp? */
if (attr != stamp_attr)
rasops24_makestamp(ri, attr);
rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
height = font->fontheight;
if (uc == (u_int)-1) {
int32_t c = stamp[0];
while (height--) {
rp[0] = rp[1] = rp[2] = rp[3] = rp[4] = rp[5] = c;
DELTA(rp, ri->ri_stride, int32_t *);
}
} else {
uc -= font->firstchar;
fr = (u_char *)font->data + uc*ri->ri_fontscale;
fs = font->stride;
while (height--) {
so = STAMP_SHIFT(fr[0], 1) & STAMP_MASK;
rp[0] = STAMP_READ(so);
rp[1] = STAMP_READ(so + 4);
rp[2] = STAMP_READ(so + 8);
so = STAMP_SHIFT(fr[0], 0) & STAMP_MASK;
rp[3] = STAMP_READ(so);
rp[4] = STAMP_READ(so + 4);
rp[5] = STAMP_READ(so + 8);
fr += fs;
DELTA(rp, ri->ri_stride, int32_t *);
}
}
/* Do underline */
if ((attr & 1) != 0) {
int32_t c = STAMP_READ(52);
DELTA(rp, -(ri->ri_stride << 1), int32_t *);
rp[0] = rp[1] = rp[2] = rp[3] = rp[4] = rp[5] = c;
}
stamp_mutex--;
}
/*
* Put a single character. This is for 12-pixel wide fonts.
*/
static void
rasops24_putchar12(void *cookie, int row, int col, u_int uc, long attr)
{
struct rasops_info *ri = (struct rasops_info *)cookie;
struct wsdisplay_font *font = PICK_FONT(ri, uc);
int height, so, fs;
int32_t *rp;
u_char *fr;
/* Can't risk remaking the stamp if it's already in use */
if (stamp_mutex++) {
stamp_mutex--;
rasops24_putchar(cookie, row, col, uc, attr);
return;
}
#ifdef RASOPS_CLIPPING
if ((unsigned)row >= (unsigned)ri->ri_rows) {
stamp_mutex--;
return;
}
if ((unsigned)col >= (unsigned)ri->ri_cols) {
stamp_mutex--;
return;
}
#endif
/* Recompute stamp? */
if (attr != stamp_attr)
rasops24_makestamp(ri, attr);
rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
height = font->fontheight;
if (uc == (u_int)-1) {
int32_t c = stamp[0];
while (height--) {
rp[0] = rp[1] = rp[2] = rp[3] =
rp[4] = rp[5] = rp[6] = rp[7] = rp[8] = c;
DELTA(rp, ri->ri_stride, int32_t *);
}
} else {
uc -= font->firstchar;
fr = (u_char *)font->data + uc*ri->ri_fontscale;
fs = font->stride;
while (height--) {
so = STAMP_SHIFT(fr[0], 1) & STAMP_MASK;
rp[0] = STAMP_READ(so);
rp[1] = STAMP_READ(so + 4);
rp[2] = STAMP_READ(so + 8);
so = STAMP_SHIFT(fr[0], 0) & STAMP_MASK;
rp[3] = STAMP_READ(so);
rp[4] = STAMP_READ(so + 4);
rp[5] = STAMP_READ(so + 8);
so = STAMP_SHIFT(fr[1], 1) & STAMP_MASK;
rp[6] = STAMP_READ(so);
rp[7] = STAMP_READ(so + 4);
rp[8] = STAMP_READ(so + 8);
fr += fs;
DELTA(rp, ri->ri_stride, int32_t *);
}
}
/* Do underline */
if ((attr & 1) != 0) {
int32_t c = STAMP_READ(52);
DELTA(rp, -(ri->ri_stride << 1), int32_t *);
rp[0] = rp[1] = rp[2] = rp[3] =
rp[4] = rp[5] = rp[6] = rp[7] = rp[8] = c;
}
stamp_mutex--;
}
/*
* Put a single character. This is for 16-pixel wide fonts.
*/
static void
rasops24_putchar16(void *cookie, int row, int col, u_int uc, long attr)
{
struct rasops_info *ri = (struct rasops_info *)cookie;
struct wsdisplay_font *font = PICK_FONT(ri, uc);
int height, so, fs;
int32_t *rp;
u_char *fr;
/* Can't risk remaking the stamp if it's already in use */
if (stamp_mutex++) {
stamp_mutex--;
rasops24_putchar(cookie, row, col, uc, attr);
return;
}
#ifdef RASOPS_CLIPPING
if ((unsigned)row >= (unsigned)ri->ri_rows) {
stamp_mutex--;
return;
}
if ((unsigned)col >= (unsigned)ri->ri_cols) {
stamp_mutex--;
return;
}
#endif
/* Recompute stamp? */
if (attr != stamp_attr)
rasops24_makestamp(ri, attr);
rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
height = font->fontheight;
if (uc == (u_int)-1) {
int32_t c = stamp[0];
while (height--) {
rp[0] = rp[1] = rp[2] = rp[3] =
rp[4] = rp[5] = rp[6] = rp[7] =
rp[8] = rp[9] = rp[10] = rp[11] = c;
DELTA(rp, ri->ri_stride, int32_t *);
}
} else {
uc -= font->firstchar;
fr = (u_char *)font->data + uc*ri->ri_fontscale;
fs = font->stride;
while (height--) {
so = STAMP_SHIFT(fr[0], 1) & STAMP_MASK;
rp[0] = STAMP_READ(so);
rp[1] = STAMP_READ(so + 4);
rp[2] = STAMP_READ(so + 8);
so = STAMP_SHIFT(fr[0], 0) & STAMP_MASK;
rp[3] = STAMP_READ(so);
rp[4] = STAMP_READ(so + 4);
rp[5] = STAMP_READ(so + 8);
so = STAMP_SHIFT(fr[1], 1) & STAMP_MASK;
rp[6] = STAMP_READ(so);
rp[7] = STAMP_READ(so + 4);
rp[8] = STAMP_READ(so + 8);
so = STAMP_SHIFT(fr[1], 0) & STAMP_MASK;
rp[9] = STAMP_READ(so);
rp[10] = STAMP_READ(so + 4);
rp[11] = STAMP_READ(so + 8);
DELTA(rp, ri->ri_stride, int32_t *);
fr += fs;
}
}
/* Do underline */
if ((attr & 1) != 0) {
int32_t c = STAMP_READ(52);
DELTA(rp, -(ri->ri_stride << 1), int32_t *);
rp[0] = rp[1] = rp[2] = rp[3] =
rp[4] = rp[5] = rp[6] = rp[7] =
rp[8] = rp[9] = rp[10] = rp[11] = c;
}
stamp_mutex--;
}
#endif /* !RASOPS_SMALL */
/*
* Erase rows. This is nice and easy due to alignment.
*/
static void
rasops24_eraserows(void *cookie, int row, int num, long attr)
{
int n9, n3, n1, cnt, stride, delta;
u_int32_t *dp, clr, xstamp[3];
struct rasops_info *ri;
/*
* If the color is gray, we can cheat and use the generic routines
* (which are faster, hopefully) since the r,g,b values are the same.
*/
if ((attr & 4) != 0) {
rasops_eraserows(cookie, row, num, attr);
return;
}
ri = (struct rasops_info *)cookie;
#ifdef RASOPS_CLIPPING
if (row < 0) {
num += row;
row = 0;
}
if ((row + num) > ri->ri_rows)
num = ri->ri_rows - row;
if (num <= 0)
return;
#endif
clr = ri->ri_devcmap[(attr >> 16) & 0xf] & 0xffffff;
xstamp[0] = (clr << 8) | (clr >> 16);
xstamp[1] = (clr << 16) | (clr >> 8);
xstamp[2] = (clr << 24) | clr;
#if BYTE_ORDER == LITTLE_ENDIAN
if ((ri->ri_flg & RI_BSWAP) == 0) {
#else
if ((ri->ri_flg & RI_BSWAP) != 0) {
#endif
xstamp[0] = bswap32(xstamp[0]);
xstamp[1] = bswap32(xstamp[1]);
xstamp[2] = bswap32(xstamp[2]);
}
/*
* XXX the wsdisplay_emulops interface seems a little deficient in
* that there is no way to clear the *entire* screen. We provide a
* workaround here: if the entire console area is being cleared, and
* the RI_FULLCLEAR flag is set, clear the entire display.
*/
if (num == ri->ri_rows && (ri->ri_flg & RI_FULLCLEAR) != 0) {
stride = ri->ri_stride;
num = ri->ri_height;
dp = (int32_t *)ri->ri_origbits;
delta = 0;
} else {
stride = ri->ri_emustride;
num *= ri->ri_font->fontheight;
dp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale);
delta = ri->ri_delta;
}
n9 = stride / 36;
cnt = (n9 << 5) + (n9 << 2); /* (32*n9) + (4*n9) */
n3 = (stride - cnt) / 12;
cnt += (n3 << 3) + (n3 << 2); /* (8*n3) + (4*n3) */
n1 = (stride - cnt) >> 2;
while (num--) {
for (cnt = n9; cnt; cnt--) {
dp[0] = xstamp[0];
dp[1] = xstamp[1];
dp[2] = xstamp[2];
dp[3] = xstamp[0];
dp[4] = xstamp[1];
dp[5] = xstamp[2];
dp[6] = xstamp[0];
dp[7] = xstamp[1];
dp[8] = xstamp[2];
dp += 9;
}
for (cnt = n3; cnt; cnt--) {
dp[0] = xstamp[0];
dp[1] = xstamp[1];
dp[2] = xstamp[2];
dp += 3;
}
for (cnt = 0; cnt < n1; cnt++)
*dp++ = xstamp[cnt];
DELTA(dp, delta, int32_t *);
}
}
/*
* Erase columns.
*/
static void
rasops24_erasecols(void *cookie, int row, int col, int num, long attr)
{
int n12, n4, height, cnt, slop, clr, xstamp[3];
struct rasops_info *ri;
int32_t *dp, *rp;
u_char *dbp;
/*
* If the color is gray, we can cheat and use the generic routines
* (which are faster, hopefully) since the r,g,b values are the same.
*/
if ((attr & 4) != 0) {
rasops_erasecols(cookie, row, col, num, attr);
return;
}
ri = (struct rasops_info *)cookie;
#ifdef RASOPS_CLIPPING
/* Catches 'row < 0' case too */
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
rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
num *= ri->ri_font->fontwidth;
height = ri->ri_font->fontheight;
clr = ri->ri_devcmap[(attr >> 16) & 0xf] & 0xffffff;
xstamp[0] = (clr << 8) | (clr >> 16);
xstamp[1] = (clr << 16) | (clr >> 8);
xstamp[2] = (clr << 24) | clr;
#if BYTE_ORDER == LITTLE_ENDIAN
if ((ri->ri_flg & RI_BSWAP) == 0) {
#else
if ((ri->ri_flg & RI_BSWAP) != 0) {
#endif
xstamp[0] = bswap32(xstamp[0]);
xstamp[1] = bswap32(xstamp[1]);
xstamp[2] = bswap32(xstamp[2]);
}
/*
* The current byte offset mod 4 tells us the number of 24-bit pels
* we need to write for alignment to 32-bits. Once we're aligned on
* a 32-bit boundary, we're also aligned on a 4 pixel boundary, so
* the stamp does not need to be rotated. The following shows the
* layout of 4 pels in a 3 word region and illustrates this:
*
* aaab bbcc cddd
*/
slop = (int)(long)rp & 3; num -= slop;
n12 = num / 12; num -= (n12 << 3) + (n12 << 2);
n4 = num >> 2; num &= 3;
while (height--) {
dbp = (u_char *)rp;
DELTA(rp, ri->ri_stride, int32_t *);
/* Align to 4 bytes */
/* XXX handle with masks, bring under control of RI_BSWAP */
for (cnt = slop; cnt; cnt--) {
*dbp++ = (clr >> 16);
*dbp++ = (clr >> 8);
*dbp++ = clr;
}
dp = (int32_t *)dbp;
/* 12 pels per loop */
for (cnt = n12; cnt; cnt--) {
dp[0] = xstamp[0];
dp[1] = xstamp[1];
dp[2] = xstamp[2];
dp[3] = xstamp[0];
dp[4] = xstamp[1];
dp[5] = xstamp[2];
dp[6] = xstamp[0];
dp[7] = xstamp[1];
dp[8] = xstamp[2];
dp += 9;
}
/* 4 pels per loop */
for (cnt = n4; cnt; cnt--) {
dp[0] = xstamp[0];
dp[1] = xstamp[1];
dp[2] = xstamp[2];
dp += 3;
}
/* Trailing slop */
/* XXX handle with masks, bring under control of RI_BSWAP */
dbp = (u_char *)dp;
for (cnt = num; cnt; cnt--) {
*dbp++ = (clr >> 16);
*dbp++ = (clr >> 8);
*dbp++ = clr;
}
}
}
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