Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
NetBSD/sys/dev/rasops/rasops.c

957 lines
20 KiB
C
Raw Blame History

/* $NetBSD: rasops.c,v 1.41 2002/07/04 17:15:28 junyoung 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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: rasops.c,v 1.41 2002/07/04 17:15:28 junyoung Exp $");
#include "opt_rasops.h"
#include "rasops_glue.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/time.h>
#include <machine/bswap.h>
#include <machine/endian.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/wscons/wsconsio.h>
#include <dev/wsfont/wsfont.h>
#include <dev/rasops/rasops.h>
#ifndef _KERNEL
#include <errno.h>
#endif
/* ANSI colormap (R,G,B). Upper 8 are high-intensity */
const u_char rasops_cmap[256*3] = {
0x00, 0x00, 0x00, /* black */
0x7f, 0x00, 0x00, /* red */
0x00, 0x7f, 0x00, /* green */
0x7f, 0x7f, 0x00, /* brown */
0x00, 0x00, 0x7f, /* blue */
0x7f, 0x00, 0x7f, /* magenta */
0x00, 0x7f, 0x7f, /* cyan */
0xc7, 0xc7, 0xc7, /* white - XXX too dim? */
0x7f, 0x7f, 0x7f, /* black */
0xff, 0x00, 0x00, /* red */
0x00, 0xff, 0x00, /* green */
0xff, 0xff, 0x00, /* brown */
0x00, 0x00, 0xff, /* blue */
0xff, 0x00, 0xff, /* magenta */
0x00, 0xff, 0xff, /* cyan */
0xff, 0xff, 0xff, /* white */
/*
* For the cursor, we need at least the last (255th)
* color to be white. Fill up white completely for
* simplicity.
*/
#define _CMWHITE 0xff, 0xff, 0xff,
#define _CMWHITE16 _CMWHITE _CMWHITE _CMWHITE _CMWHITE \
_CMWHITE _CMWHITE _CMWHITE _CMWHITE \
_CMWHITE _CMWHITE _CMWHITE _CMWHITE \
_CMWHITE _CMWHITE _CMWHITE _CMWHITE
_CMWHITE16 _CMWHITE16 _CMWHITE16 _CMWHITE16 _CMWHITE16
_CMWHITE16 _CMWHITE16 _CMWHITE16 _CMWHITE16 _CMWHITE16
_CMWHITE16 _CMWHITE16 _CMWHITE16 _CMWHITE16 _CMWHITE16
#undef _CMWHITE16
#undef _CMWHITE
};
/* True if color is gray */
const u_char rasops_isgray[16] = {
1, 0, 0, 0,
0, 0, 0, 1,
1, 0, 0, 0,
0, 0, 0, 1
};
/* Generic functions */
static void rasops_copyrows __P((void *, int, int, int));
static int rasops_mapchar __P((void *, int, u_int *));
static void rasops_cursor __P((void *, int, int, int));
static int rasops_allocattr_color __P((void *, int, int, int, long *));
static int rasops_allocattr_mono __P((void *, int, int, int, long *));
static void rasops_do_cursor __P((struct rasops_info *));
static void rasops_init_devcmap __P((struct rasops_info *));
/*
* Initialize a 'rasops_info' descriptor.
*/
int
rasops_init(ri, wantrows, wantcols)
struct rasops_info *ri;
int wantrows, wantcols;
{
#ifdef _KERNEL
/* Select a font if the caller doesn't care */
if (ri->ri_font == NULL) {
int cookie;
wsfont_init();
/* Want 8 pixel wide, don't care about aestethics */
cookie = wsfont_find(NULL, 8, 0, 0, WSDISPLAY_FONTORDER_L2R,
WSDISPLAY_FONTORDER_L2R);
if (cookie <= 0)
cookie = wsfont_find(NULL, 0, 0, 0,
WSDISPLAY_FONTORDER_L2R, WSDISPLAY_FONTORDER_L2R);
if (cookie <= 0) {
printf("rasops_init: font table is empty\n");
return (-1);
}
if (wsfont_lock(cookie, &ri->ri_font)) {
printf("rasops_init: couldn't lock font\n");
return (-1);
}
ri->ri_wsfcookie = cookie;
}
#endif
/* This should never happen in reality... */
#ifdef DEBUG
if ((long)ri->ri_bits & 3) {
printf("rasops_init: bits not aligned on 32-bit boundary\n");
return (-1);
}
if ((int)ri->ri_stride & 3) {
printf("rasops_init: stride not aligned on 32-bit boundary\n");
return (-1);
}
#endif
if (rasops_reconfig(ri, wantrows, wantcols))
return (-1);
rasops_init_devcmap(ri);
return (0);
}
/*
* Reconfigure (because parameters have changed in some way).
*/
int
rasops_reconfig(ri, wantrows, wantcols)
struct rasops_info *ri;
int wantrows, wantcols;
{
int bpp, s;
s = splhigh();
if (ri->ri_font->fontwidth > 32 || ri->ri_font->fontwidth < 4)
panic("rasops_init: fontwidth assumptions botched!\n");
/* Need this to frob the setup below */
bpp = (ri->ri_depth == 15 ? 16 : ri->ri_depth);
if ((ri->ri_flg & RI_CFGDONE) != 0)
ri->ri_bits = ri->ri_origbits;
/* Don't care if the caller wants a hideously small console */
if (wantrows < 10)
wantrows = 10;
if (wantcols < 20)
wantcols = 20;
/* Now constrain what they get */
ri->ri_emuwidth = ri->ri_font->fontwidth * wantcols;
ri->ri_emuheight = ri->ri_font->fontheight * wantrows;
if (ri->ri_emuwidth > ri->ri_width)
ri->ri_emuwidth = ri->ri_width;
if (ri->ri_emuheight > ri->ri_height)
ri->ri_emuheight = ri->ri_height;
/* Reduce width until aligned on a 32-bit boundary */
while ((ri->ri_emuwidth * bpp & 31) != 0)
ri->ri_emuwidth--;
ri->ri_cols = ri->ri_emuwidth / ri->ri_font->fontwidth;
ri->ri_rows = ri->ri_emuheight / ri->ri_font->fontheight;
ri->ri_emustride = ri->ri_emuwidth * bpp >> 3;
ri->ri_delta = ri->ri_stride - ri->ri_emustride;
ri->ri_ccol = 0;
ri->ri_crow = 0;
ri->ri_pelbytes = bpp >> 3;
ri->ri_xscale = (ri->ri_font->fontwidth * bpp) >> 3;
ri->ri_yscale = ri->ri_font->fontheight * ri->ri_stride;
ri->ri_fontscale = ri->ri_font->fontheight * ri->ri_font->stride;
#ifdef DEBUG
if ((ri->ri_delta & 3) != 0)
panic("rasops_init: ri_delta not aligned on 32-bit boundary");
#endif
/* Clear the entire display */
if ((ri->ri_flg & RI_CLEAR) != 0)
memset(ri->ri_bits, 0, ri->ri_stride * ri->ri_height);
/* Now centre our window if needs be */
ri->ri_origbits = ri->ri_bits;
if ((ri->ri_flg & RI_CENTER) != 0) {
ri->ri_bits += (((ri->ri_width * bpp >> 3) -
ri->ri_emustride) >> 1) & ~3;
ri->ri_bits += ((ri->ri_height - ri->ri_emuheight) >> 1) *
ri->ri_stride;
ri->ri_yorigin = (int)(ri->ri_bits - ri->ri_origbits)
/ ri->ri_stride;
ri->ri_xorigin = (((int)(ri->ri_bits - ri->ri_origbits)
% ri->ri_stride) * 8 / bpp);
} else
ri->ri_xorigin = ri->ri_yorigin = 0;
/*
* Fill in defaults for operations set. XXX this nukes private
* routines used by accelerated fb drivers.
*/
ri->ri_ops.mapchar = rasops_mapchar;
ri->ri_ops.copyrows = rasops_copyrows;
ri->ri_ops.copycols = rasops_copycols;
ri->ri_ops.erasecols = rasops_erasecols;
ri->ri_ops.eraserows = rasops_eraserows;
ri->ri_ops.cursor = rasops_cursor;
ri->ri_do_cursor = rasops_do_cursor;
if (ri->ri_depth < 8 || (ri->ri_flg & RI_FORCEMONO) != 0) {
ri->ri_ops.allocattr = rasops_allocattr_mono;
ri->ri_caps = WSSCREEN_UNDERLINE | WSSCREEN_REVERSE;
} else {
ri->ri_ops.allocattr = rasops_allocattr_color;
ri->ri_caps = WSSCREEN_UNDERLINE | WSSCREEN_HILIT |
WSSCREEN_WSCOLORS | WSSCREEN_REVERSE;
}
switch (ri->ri_depth) {
#if NRASOPS1 > 0
case 1:
rasops1_init(ri);
break;
#endif
#if NRASOPS2 > 0
case 2:
rasops2_init(ri);
break;
#endif
#if NRASOPS4 > 0
case 4:
rasops4_init(ri);
break;
#endif
#if NRASOPS8 > 0
case 8:
rasops8_init(ri);
break;
#endif
#if NRASOPS15 > 0 || NRASOPS16 > 0
case 15:
case 16:
rasops15_init(ri);
break;
#endif
#if NRASOPS24 > 0
case 24:
rasops24_init(ri);
break;
#endif
#if NRASOPS32 > 0
case 32:
rasops32_init(ri);
break;
#endif
default:
ri->ri_flg &= ~RI_CFGDONE;
splx(s);
return (-1);
}
ri->ri_flg |= RI_CFGDONE;
splx(s);
return (0);
}
/*
* Map a character.
*/
static int
rasops_mapchar(cookie, c, cp)
void *cookie;
int c;
u_int *cp;
{
struct rasops_info *ri;
ri = (struct rasops_info *)cookie;
#ifdef DIAGNOSTIC
if (ri->ri_font == NULL)
panic("rasops_mapchar: no font selected\n");
#endif
if (ri->ri_font->encoding != WSDISPLAY_FONTENC_ISO) {
if ( (c = wsfont_map_unichar(ri->ri_font, c)) < 0) {
*cp = ' ';
return (0);
}
}
if (c < ri->ri_font->firstchar) {
*cp = ' ';
return (0);
}
if (c - ri->ri_font->firstchar >= ri->ri_font->numchars) {
*cp = ' ';
return (0);
}
*cp = c;
return (5);
}
/*
* Allocate a color attribute.
*/
static int
rasops_allocattr_color(cookie, fg, bg, flg, attr)
void *cookie;
int fg, bg, flg;
long *attr;
{
int swap;
#ifdef RASOPS_CLIPPING
fg &= 7;
bg &= 7;
#endif
if ((flg & WSATTR_BLINK) != 0)
return (EINVAL);
if ((flg & WSATTR_WSCOLORS) == 0) {
fg = WSCOL_WHITE;
bg = WSCOL_BLACK;
}
if ((flg & WSATTR_REVERSE) != 0) {
swap = fg;
fg = bg;
bg = swap;
}
if ((flg & WSATTR_HILIT) != 0)
fg += 8;
flg = ((flg & WSATTR_UNDERLINE) ? 1 : 0);
if (rasops_isgray[fg])
flg |= 2;
if (rasops_isgray[bg])
flg |= 4;
*attr = (bg << 16) | (fg << 24) | flg;
return (0);
}
/*
* Allocate a mono attribute.
*/
static int
rasops_allocattr_mono(cookie, fg, bg, flg, attr)
void *cookie;
int fg, bg, flg;
long *attr;
{
int swap;
if ((flg & (WSATTR_BLINK | WSATTR_HILIT | WSATTR_WSCOLORS)) != 0)
return (EINVAL);
fg = 1;
bg = 0;
if ((flg & WSATTR_REVERSE) != 0) {
swap = fg;
fg = bg;
bg = swap;
}
*attr = (bg << 16) | (fg << 24) | ((flg & WSATTR_UNDERLINE) ? 7 : 6);
return (0);
}
/*
* Copy rows.
*/
static void
rasops_copyrows(cookie, src, dst, num)
void *cookie;
int src, dst, num;
{
int32_t *sp, *dp, *srp, *drp;
struct rasops_info *ri;
int n8, n1, cnt, delta;
ri = (struct rasops_info *)cookie;
#ifdef RASOPS_CLIPPING
if (dst == src)
return;
if (src < 0) {
num += src;
src = 0;
}
if ((src + num) > ri->ri_rows)
num = ri->ri_rows - src;
if (dst < 0) {
num += dst;
dst = 0;
}
if ((dst + num) > ri->ri_rows)
num = ri->ri_rows - dst;
if (num <= 0)
return;
#endif
num *= ri->ri_font->fontheight;
n8 = ri->ri_emustride >> 5;
n1 = (ri->ri_emustride >> 2) & 7;
if (dst < src) {
srp = (int32_t *)(ri->ri_bits + src * ri->ri_yscale);
drp = (int32_t *)(ri->ri_bits + dst * ri->ri_yscale);
delta = ri->ri_stride;
} else {
src = ri->ri_font->fontheight * src + num - 1;
dst = ri->ri_font->fontheight * dst + num - 1;
srp = (int32_t *)(ri->ri_bits + src * ri->ri_stride);
drp = (int32_t *)(ri->ri_bits + dst * ri->ri_stride);
delta = -ri->ri_stride;
}
while (num--) {
dp = drp;
sp = srp;
DELTA(drp, delta, int32_t *);
DELTA(srp, delta, int32_t *);
for (cnt = n8; cnt; cnt--) {
dp[0] = sp[0];
dp[1] = sp[1];
dp[2] = sp[2];
dp[3] = sp[3];
dp[4] = sp[4];
dp[5] = sp[5];
dp[6] = sp[6];
dp[7] = sp[7];
dp += 8;
sp += 8;
}
for (cnt = n1; cnt; cnt--)
*dp++ = *sp++;
}
}
/*
* Copy columns. This is slow, and hard to optimize due to alignment,
* and the fact that we have to copy both left->right and right->left.
* We simply cop-out here and use bcopy(), since it handles all of
* these cases anyway.
*/
void
rasops_copycols(cookie, row, src, dst, num)
void *cookie;
int row, src, dst, num;
{
struct rasops_info *ri;
u_char *sp, *dp;
int height;
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
num *= ri->ri_xscale;
row *= ri->ri_yscale;
height = ri->ri_font->fontheight;
sp = ri->ri_bits + row + src * ri->ri_xscale;
dp = ri->ri_bits + row + dst * ri->ri_xscale;
while (height--) {
bcopy(sp, dp, num);
dp += ri->ri_stride;
sp += ri->ri_stride;
}
}
/*
* Turn cursor off/on.
*/
static void
rasops_cursor(cookie, on, row, col)
void *cookie;
int on, row, col;
{
struct rasops_info *ri;
ri = (struct rasops_info *)cookie;
/* Turn old cursor off */
if ((ri->ri_flg & RI_CURSOR) != 0)
#ifdef RASOPS_CLIPPING
if ((ri->ri_flg & RI_CURSORCLIP) == 0)
#endif
ri->ri_do_cursor(ri);
/* Select new cursor */
#ifdef RASOPS_CLIPPING
ri->ri_flg &= ~RI_CURSORCLIP;
if (row < 0 || row >= ri->ri_rows)
ri->ri_flg |= RI_CURSORCLIP;
else if (col < 0 || col >= ri->ri_cols)
ri->ri_flg |= RI_CURSORCLIP;
#endif
ri->ri_crow = row;
ri->ri_ccol = col;
if (on) {
ri->ri_flg |= RI_CURSOR;
#ifdef RASOPS_CLIPPING
if ((ri->ri_flg & RI_CURSORCLIP) == 0)
#endif
ri->ri_do_cursor(ri);
} else
ri->ri_flg &= ~RI_CURSOR;
}
/*
* Make the device colormap
*/
static void
rasops_init_devcmap(ri)
struct rasops_info *ri;
{
const u_char *p;
int i, c;
switch (ri->ri_depth) {
case 1:
ri->ri_devcmap[0] = 0;
for (i = 1; i < 16; i++)
ri->ri_devcmap[i] = -1;
return;
case 2:
for (i = 1; i < 15; i++)
ri->ri_devcmap[i] = 0xaaaaaaaa;
ri->ri_devcmap[0] = 0;
ri->ri_devcmap[8] = 0x55555555;
ri->ri_devcmap[15] = -1;
return;
case 8:
for (i = 0; i < 16; i++)
ri->ri_devcmap[i] = i | (i<<8) | (i<<16) | (i<<24);
return;
}
p = rasops_cmap;
for (i = 0; i < 16; i++) {
if (ri->ri_rnum <= 8)
c = (*p >> (8 - ri->ri_rnum)) << ri->ri_rpos;
else
c = (*p << (ri->ri_rnum - 8)) << ri->ri_rpos;
p++;
if (ri->ri_gnum <= 8)
c |= (*p >> (8 - ri->ri_gnum)) << ri->ri_gpos;
else
c |= (*p << (ri->ri_gnum - 8)) << ri->ri_gpos;
p++;
if (ri->ri_bnum <= 8)
c |= (*p >> (8 - ri->ri_bnum)) << ri->ri_bpos;
else
c |= (*p << (ri->ri_bnum - 8)) << ri->ri_bpos;
p++;
/* Fill the word for generic routines, which want this */
if (ri->ri_depth == 24)
c = c | ((c & 0xff) << 24);
else if (ri->ri_depth <= 16)
c = c | (c << 16);
/* 24bpp does bswap on the fly. {32,16,15}bpp do it here. */
if ((ri->ri_flg & RI_BSWAP) == 0)
ri->ri_devcmap[i] = c;
else if (ri->ri_depth == 32)
ri->ri_devcmap[i] = bswap32(c);
else if (ri->ri_depth == 16 || ri->ri_depth == 15)
ri->ri_devcmap[i] = bswap16(c);
else
ri->ri_devcmap[i] = c;
}
}
/*
* Unpack a rasops attribute
*/
void
rasops_unpack_attr(attr, fg, bg, underline)
long attr;
int *fg, *bg, *underline;
{
*fg = ((u_int)attr >> 24) & 0xf;
*bg = ((u_int)attr >> 16) & 0xf;
if (underline != NULL)
*underline = (u_int)attr & 1;
}
/*
* Erase rows. This isn't static, since 24-bpp uses it in special cases.
*/
void
rasops_eraserows(cookie, row, num, attr)
void *cookie;
int row, num;
long attr;
{
struct rasops_info *ri;
int np, nw, cnt, delta;
int32_t *dp, clr;
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];
/*
* 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) {
np = ri->ri_stride >> 5;
nw = (ri->ri_stride >> 2) & 7;
num = ri->ri_height;
dp = (int32_t *)ri->ri_origbits;
delta = 0;
} else {
np = ri->ri_emustride >> 5;
nw = (ri->ri_emustride >> 2) & 7;
num *= ri->ri_font->fontheight;
dp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale);
delta = ri->ri_delta;
}
while (num--) {
for (cnt = np; cnt; cnt--) {
dp[0] = clr;
dp[1] = clr;
dp[2] = clr;
dp[3] = clr;
dp[4] = clr;
dp[5] = clr;
dp[6] = clr;
dp[7] = clr;
dp += 8;
}
for (cnt = nw; cnt; cnt--) {
*(int32_t *)dp = clr;
DELTA(dp, 4, int32_t *);
}
DELTA(dp, delta, int32_t *);
}
}
/*
* Actually turn the cursor on or off. This does the dirty work for
* rasops_cursor().
*/
static void
rasops_do_cursor(ri)
struct rasops_info *ri;
{
int full1, height, cnt, slop1, slop2, row, col;
u_char *dp, *rp;
row = ri->ri_crow;
col = ri->ri_ccol;
rp = ri->ri_bits + row * ri->ri_yscale + col * ri->ri_xscale;
height = ri->ri_font->fontheight;
slop1 = (4 - ((long)rp & 3)) & 3;
if (slop1 > ri->ri_xscale)
slop1 = ri->ri_xscale;
slop2 = (ri->ri_xscale - slop1) & 3;
full1 = (ri->ri_xscale - slop1 - slop2) >> 2;
if ((slop1 | slop2) == 0) {
/* A common case */
while (height--) {
dp = rp;
rp += ri->ri_stride;
for (cnt = full1; cnt; cnt--) {
*(int32_t *)dp ^= ~0;
dp += 4;
}
}
} else {
/* XXX this is stupid.. use masks instead */
while (height--) {
dp = rp;
rp += ri->ri_stride;
if (slop1 & 1)
*dp++ ^= ~0;
if (slop1 & 2) {
*(int16_t *)dp ^= ~0;
dp += 2;
}
for (cnt = full1; cnt; cnt--) {
*(int32_t *)dp ^= ~0;
dp += 4;
}
if (slop2 & 1)
*dp++ ^= ~0;
if (slop2 & 2)
*(int16_t *)dp ^= ~0;
}
}
}
/*
* Erase columns.
*/
void
rasops_erasecols(cookie, row, col, num, attr)
void *cookie;
int row, col, num;
long attr;
{
int n8, height, cnt, slop1, slop2, clr;
struct rasops_info *ri;
int32_t *rp, *dp;
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
num = num * ri->ri_xscale;
rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
height = ri->ri_font->fontheight;
clr = ri->ri_devcmap[(attr >> 16) & 0xf];
/* Don't bother using the full loop for <= 32 pels */
if (num <= 32) {
if (((num | ri->ri_xscale) & 3) == 0) {
/* Word aligned blt */
num >>= 2;
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
for (cnt = num; cnt; cnt--)
*dp++ = clr;
}
} else if (((num | ri->ri_xscale) & 1) == 0) {
/*
* Halfword aligned blt. This is needed so the
* 15/16 bit ops can use this function.
*/
num >>= 1;
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
for (cnt = num; cnt; cnt--) {
*(int16_t *)dp = clr;
DELTA(dp, 2, int32_t *);
}
}
} else {
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
for (cnt = num; cnt; cnt--) {
*(u_char *)dp = clr;
DELTA(dp, 1, int32_t *);
}
}
}
return;
}
slop1 = (4 - ((long)rp & 3)) & 3;
slop2 = (num - slop1) & 3;
num -= slop1 + slop2;
n8 = num >> 5;
num = (num >> 2) & 7;
while (height--) {
dp = rp;
DELTA(rp, ri->ri_stride, int32_t *);
/* Align span to 4 bytes */
if (slop1 & 1) {
*(u_char *)dp = clr;
DELTA(dp, 1, int32_t *);
}
if (slop1 & 2) {
*(int16_t *)dp = clr;
DELTA(dp, 2, int32_t *);
}
/* Write 32 bytes per loop */
for (cnt = n8; cnt; cnt--) {
dp[0] = clr;
dp[1] = clr;
dp[2] = clr;
dp[3] = clr;
dp[4] = clr;
dp[5] = clr;
dp[6] = clr;
dp[7] = clr;
dp += 8;
}
/* Write 4 bytes per loop */
for (cnt = num; cnt; cnt--)
*dp++ = clr;
/* Write unaligned trailing slop */
if (slop2 & 1) {
*(u_char *)dp = clr;
DELTA(dp, 1, int32_t *);
}
if (slop2 & 2)
*(int16_t *)dp = clr;
}
}
Reference in New Issue View Git Blame Copy Permalink