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/* $NetBSD: rasops24.c,v 1.50 2019/08/14 00:51:10 rin 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 1.50 2019/08/14 00:51:10 rin Exp $");
#ifdef _KERNEL_OPT
#include "opt_rasops.h"
#endif
#include <sys/param.h>
#include <sys/bswap.h>
#include <machine/endian.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#define _RASOPS_PRIVATE
#define RASOPS_DEPTH 24
#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);
static void rasops24_putchar_aa(void *, int, int, u_int, long);
static __inline void
rasops24_makestamp1(struct rasops_info *, uint32_t *,
uint32_t, uint32_t, uint32_t, uint32_t);
#ifndef RASOPS_SMALL
static void rasops24_putchar8(void *, int, int, u_int, long);
static void rasops24_putchar12(void *, int, int, u_int, long);
static void rasops24_putchar16(void *, int, int, u_int, long);
static void rasops24_makestamp(struct rasops_info *, long);
#endif
#ifndef RASOPS_SMALL
/* stamp for optimized character blitting */
static uint32_t stamp[64];
static long stamp_attr;
static struct rasops_info *stamp_ri;
/*
* offset = STAMP_SHIFT(fontbits, nibble #) & STAMP_MASK
* destination uint32_t[0] = STAMP_READ(offset)
* destination uint32_t[1] = STAMP_READ(offset + 4)
* destination uint32_t[2] = STAMP_READ(offset + 8)
*/
#define STAMP_SHIFT(fb, n) ((n) ? (fb) : (fb) << 4)
#define STAMP_MASK (0xf << 4)
#define STAMP_READ(o) (*(uint32_t *)((uint8_t *)stamp + (o)))
#endif
/*
* Initialize rasops_info struct for this colordepth.
*/
void
rasops24_init(struct rasops_info *ri)
{
if (ri->ri_rnum == 0) {
ri->ri_rnum = ri->ri_gnum = ri->ri_bnum = 8;
ri->ri_rpos = 0;
ri->ri_gpos = 8;
ri->ri_bpos = 16;
}
ri->ri_ops.erasecols = rasops24_erasecols;
ri->ri_ops.eraserows = rasops24_eraserows;
if (FONT_IS_ALPHA(ri->ri_font)) {
ri->ri_ops.putchar = rasops24_putchar_aa;
return;
}
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;
return;
}
#ifndef RASOPS_SMALL
stamp_attr = -1;
stamp_ri = NULL;
#endif
}
/* rasops24_putchar */
#undef RASOPS_AA
#include <dev/rasops/rasops_putchar.h>
/* rasops24_putchar_aa */
#define RASOPS_AA
#include <dev/rasops/rasops_putchar.h>
#undef RASOPS_AA
static __inline void
rasops24_makestamp1(struct rasops_info *ri, uint32_t *xstamp,
uint32_t c1, uint32_t c2, uint32_t c3, uint32_t c4)
{
xstamp[0] = (c1 << 8) | (c2 >> 16);
xstamp[1] = (c2 << 16) | (c3 >> 8);
xstamp[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
{
xstamp[0] = bswap32(xstamp[0]);
xstamp[1] = bswap32(xstamp[1]);
xstamp[2] = bswap32(xstamp[2]);
}
}
#ifndef RASOPS_SMALL
/*
* Recompute the blitting stamp.
*/
static void
rasops24_makestamp(struct rasops_info *ri, long attr)
{
int i;
uint32_t bg, fg, c1, c2, c3, c4;
stamp_attr = attr;
stamp_ri = ri;
bg = ATTR_BG(ri, attr) & 0xffffff;
fg = ATTR_FG(ri, attr) & 0xffffff;
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
rasops24_makestamp1(ri, &stamp[i], c1, c2, c3, c4);
}
}
/*
* Width-optimized putchar functions
*/
#define RASOPS_WIDTH 8
#include <dev/rasops/rasops_putchar_width.h>
#undef RASOPS_WIDTH
#define RASOPS_WIDTH 12
#include <dev/rasops/rasops_putchar_width.h>
#undef RASOPS_WIDTH
#define RASOPS_WIDTH 16
#include <dev/rasops/rasops_putchar_width.h>
#undef RASOPS_WIDTH
#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)
{
struct rasops_info *ri = (struct rasops_info *)cookie;
int bytes, full, slop, cnt;
uint32_t bg, xstamp[3];
uint32_t *dp, *rp, *hp;
hp = NULL; /* XXX GCC */
/*
* 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 & WSATTR_PRIVATE2) != 0) {
rasops_eraserows(cookie, row, num, attr);
return;
}
#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
bg = ATTR_BG(ri, attr) & 0xffffff;
rasops24_makestamp1(ri, xstamp, bg, bg, bg, bg);
/*
* 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) {
bytes = ri->ri_stride;
num = ri->ri_height;
rp = (uint32_t *)ri->ri_origbits;
if (ri->ri_hwbits)
hp = (uint32_t *)ri->ri_hworigbits;
} else {
bytes = ri->ri_emustride;
num *= ri->ri_font->fontheight;
rp = (uint32_t *)(ri->ri_bits + row * ri->ri_yscale);
if (ri->ri_hwbits)
hp = (uint32_t *)(ri->ri_hwbits + row * ri->ri_yscale);
}
full = bytes / (4 * 3);
slop = (bytes - full * (4 * 3)) / 4;
while (num--) {
dp = rp;
for (cnt = full; cnt; cnt--) {
dp[0] = xstamp[0];
dp[1] = xstamp[1];
dp[2] = xstamp[2];
dp += 3;
}
for (cnt = 0; cnt < slop; cnt++)
*dp++ = xstamp[cnt];
if (ri->ri_hwbits) {
memcpy(hp, rp, bytes);
DELTA(hp, ri->ri_stride, uint32_t *);
}
DELTA(rp, ri->ri_stride, uint32_t *);
}
}
/*
* Erase columns.
*/
static void
rasops24_erasecols(void *cookie, int row, int col, int num, long attr)
{
struct rasops_info *ri = (struct rasops_info *)cookie;
int height, slop1, slop2, full, cnt;
uint32_t bg, xstamp[3];
uint32_t *dp;
uint8_t *bp, *rp, *hp;
hp = NULL; /* XXX GCC */
/*
* 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 & WSATTR_PRIVATE2) != 0) {
rasops_erasecols(cookie, row, col, num, attr);
return;
}
#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
height = ri->ri_font->fontheight;
num *= ri->ri_xscale;
rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
if (ri->ri_hwbits)
hp = ri->ri_hwbits + row * ri->ri_yscale + col * ri->ri_xscale;
bg = ATTR_BG(ri, attr) & 0xffffff;
rasops24_makestamp1(ri, xstamp, bg, bg, bg, bg);
/*
* Align to word boundary by 24-bit-wise operations:
*
* rp % 4 == 1 ---> slop1 = 3:
* 0123
* -RGB
*
* rp % 4 == 2 ---> slop1 = 6:
* 0123 0123
* --RG BRGB
*
* rp % 4 == 3 ---> slop1 = 9:
* 0123 0123 0123
* ---R GBRG BRGB
*/
slop1 = 3 * ((uintptr_t)rp % 4);
slop2 = (num - slop1) % 12;
full = (num - slop1 /* - slop2 */) / 12;
while (height--) {
/* Align to word boundary */
bp = rp;
for (cnt = slop1; cnt; cnt -= 3) {
*bp++ = (bg >> 16);
*bp++ = (bg >> 8);
*bp++ = bg;
}
/* 4 pels per loop */
dp = (uint32_t *)bp;
for (cnt = full; cnt; cnt--) {
dp[0] = xstamp[0];
dp[1] = xstamp[1];
dp[2] = xstamp[2];
dp += 3;
}
/* Trailing slop */
bp = (uint8_t *)dp;
for (cnt = slop2; cnt; cnt -= 3) {
*bp++ = (bg >> 16);
*bp++ = (bg >> 8);
*bp++ = bg;
}
if (ri->ri_hwbits) {
memcpy(hp, rp, num);
hp += ri->ri_stride;
}
rp += ri->ri_stride;
}
}
|