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rasops_bitops.h revision 1.8.22.1 
      1 /* 	$NetBSD: rasops_bitops.h,v 1.8.22.1 2006/06/21 15:06:47 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Andrew Doran.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the NetBSD
     21  *	Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef _RASOPS_BITOPS_H_
     40 #define _RASOPS_BITOPS_H_ 1
     41 
     42 /*
     43  * Erase columns.
     44  */
     45 static void
     46 NAME(erasecols)(cookie, row, col, num, attr)
     47 	void *cookie;
     48 	int row, col, num;
     49 	long attr;
     50 {
     51 	int lmask, rmask, lclr, rclr, clr;
     52 	struct rasops_info *ri;
     53 	int32_t *dp, *rp;
     54 	int height, cnt;
     55 
     56 	ri = (struct rasops_info *)cookie;
     57 
     58 #ifdef RASOPS_CLIPPING
     59 	if ((unsigned)row >= (unsigned)ri->ri_rows)
     60 		return;
     61 
     62 	if (col < 0) {
     63 		num += col;
     64 		col = 0;
     65 	}
     66 
     67 	if ((col + num) > ri->ri_cols)
     68 		num = ri->ri_cols - col;
     69 
     70 	if (num <= 0)
     71 		return;
     72 #endif
     73 	col *= ri->ri_font->fontwidth << PIXEL_SHIFT;
     74 	num *= ri->ri_font->fontwidth << PIXEL_SHIFT;
     75 	height = ri->ri_font->fontheight;
     76 	clr = ri->ri_devcmap[(attr >> 16) & 0xf];
     77 	rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + ((col >> 3) & ~3));
     78 
     79 	if ((col & 31) + num <= 32) {
     80 		lmask = ~rasops_pmask[col & 31][num];
     81 		lclr = clr & ~lmask;
     82 
     83 		while (height--) {
     84 			dp = rp;
     85 			DELTA(rp, ri->ri_stride, int32_t *);
     86 
     87 			*dp = (*dp & lmask) | lclr;
     88 		}
     89 	} else {
     90 		lmask = rasops_rmask[col & 31];
     91 		rmask = rasops_lmask[(col + num) & 31];
     92 
     93 		if (lmask)
     94 			num = (num - (32 - (col & 31))) >> 5;
     95 		else
     96 			num = num >> 5;
     97 
     98 		lclr = clr & ~lmask;
     99 		rclr = clr & ~rmask;
    100 
    101 		while (height--) {
    102 			dp = rp;
    103 			DELTA(rp, ri->ri_stride, int32_t *);
    104 
    105 			if (lmask) {
    106 				*dp = (*dp & lmask) | lclr;
    107 				dp++;
    108 			}
    109 
    110 			for (cnt = num; cnt > 0; cnt--)
    111 				*dp++ = clr;
    112 
    113 			if (rmask)
    114 				*dp = (*dp & rmask) | rclr;
    115 		}
    116 	}
    117 }
    118 
    119 /*
    120  * Actually paint the cursor.
    121  */
    122 static void
    123 NAME(do_cursor)(ri)
    124 	struct rasops_info *ri;
    125 {
    126 	int lmask, rmask, height, row, col, num;
    127 	int32_t *dp, *rp;
    128 
    129 	row = ri->ri_crow;
    130 	col = ri->ri_ccol * ri->ri_font->fontwidth << PIXEL_SHIFT;
    131 	height = ri->ri_font->fontheight;
    132 	num = ri->ri_font->fontwidth << PIXEL_SHIFT;
    133 	rp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale + ((col >> 3) & ~3));
    134 
    135 	if ((col & 31) + num <= 32) {
    136 		lmask = rasops_pmask[col & 31][num];
    137 
    138 		while (height--) {
    139 			dp = rp;
    140 			DELTA(rp, ri->ri_stride, int32_t *);
    141 			*dp ^= lmask;
    142 		}
    143 	} else {
    144 		lmask = ~rasops_rmask[col & 31];
    145 		rmask = ~rasops_lmask[(col + num) & 31];
    146 
    147 		while (height--) {
    148 			dp = rp;
    149 			DELTA(rp, ri->ri_stride, int32_t *);
    150 
    151 			if (lmask != -1)
    152 				*dp++ ^= lmask;
    153 
    154 			if (rmask != -1)
    155 				*dp ^= rmask;
    156 		}
    157 	}
    158 }
    159 
    160 /*
    161  * Copy columns. Ick!
    162  */
    163 static void
    164 NAME(copycols)(cookie, row, src, dst, num)
    165 	void *cookie;
    166 	int row, src, dst, num;
    167 {
    168 	int tmp, lmask, rmask, height, lnum, rnum, sb, db, cnt, full;
    169 	int32_t *sp, *dp, *srp, *drp;
    170 	struct rasops_info *ri;
    171 
    172 	sp = NULL;	/* XXX gcc */
    173 
    174 	ri = (struct rasops_info *)cookie;
    175 
    176 #ifdef RASOPS_CLIPPING
    177 	if (dst == src)
    178 		return;
    179 
    180 	/* Catches < 0 case too */
    181 	if ((unsigned)row >= (unsigned)ri->ri_rows)
    182 		return;
    183 
    184 	if (src < 0) {
    185 		num += src;
    186 		src = 0;
    187 	}
    188 
    189 	if ((src + num) > ri->ri_cols)
    190 		num = ri->ri_cols - src;
    191 
    192 	if (dst < 0) {
    193 		num += dst;
    194 		dst = 0;
    195 	}
    196 
    197 	if ((dst + num) > ri->ri_cols)
    198 		num = ri->ri_cols - dst;
    199 
    200 	if (num <= 0)
    201 		return;
    202 #endif
    203 
    204 	cnt = ri->ri_font->fontwidth << PIXEL_SHIFT;
    205 	src *= cnt;
    206 	dst *= cnt;
    207 	num *= cnt;
    208 	row *= ri->ri_yscale;
    209 	height = ri->ri_font->fontheight;
    210 	db = dst & 31;
    211 
    212 	if (db + num <= 32) {
    213 		/* Destination is contained within a single word */
    214 		srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
    215 		drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
    216 		sb = src & 31;
    217 
    218 		while (height--) {
    219 			GETBITS(srp, sb, num, tmp);
    220 			PUTBITS(tmp, db, num, drp);
    221 			DELTA(srp, ri->ri_stride, int32_t *);
    222 			DELTA(drp, ri->ri_stride, int32_t *);
    223 		}
    224 
    225 		return;
    226 	}
    227 
    228 	lmask = rasops_rmask[db];
    229 	rmask = rasops_lmask[(dst + num) & 31];
    230 	lnum = (32 - db) & 31;
    231 	rnum = (dst + num) & 31;
    232 
    233 	if (lmask)
    234 		full = (num - (32 - (dst & 31))) >> 5;
    235 	else
    236 		full = num >> 5;
    237 
    238 	if (src < dst && src + num > dst) {
    239 		/* Copy right-to-left */
    240 		sb = src & 31;
    241 		src = src + num;
    242 		dst = dst + num;
    243 		srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
    244 		drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
    245 
    246 		src = src & 31;
    247 		rnum = 32 - lnum;
    248 		db = dst & 31;
    249 
    250 		if ((src -= db) < 0) {
    251 			sp--;
    252 			src += 32;
    253 		}
    254 
    255 		while (height--) {
    256 			sp = srp;
    257 			dp = drp;
    258 			DELTA(srp, ri->ri_stride, int32_t *);
    259 			DELTA(drp, ri->ri_stride, int32_t *);
    260 
    261 			if (db) {
    262 				GETBITS(sp, src, db, tmp);
    263 				PUTBITS(tmp, 0, db, dp);
    264 				dp--;
    265 				sp--;
    266 			}
    267 
    268 			/* Now aligned to 32-bits wrt dp */
    269 			for (cnt = full; cnt; cnt--, sp--) {
    270 				GETBITS(sp, src, 32, tmp);
    271 				*dp-- = tmp;
    272 			}
    273 
    274 			if (lmask) {
    275 #if 0
    276 				if (src > sb)
    277 					sp++;
    278 #endif
    279 				GETBITS(sp, sb, lnum, tmp);
    280 				PUTBITS(tmp, rnum, lnum, dp);
    281  			}
    282  		}
    283 	} else {
    284 		/* Copy left-to-right */
    285 		srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
    286 		drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
    287 		db = dst & 31;
    288 
    289 		while (height--) {
    290 			sb = src & 31;
    291 			sp = srp;
    292 			dp = drp;
    293 			DELTA(srp, ri->ri_stride, int32_t *);
    294 			DELTA(drp, ri->ri_stride, int32_t *);
    295 
    296 			if (lmask) {
    297 				GETBITS(sp, sb, lnum, tmp);
    298 				PUTBITS(tmp, db, lnum, dp);
    299 				dp++;
    300 
    301 				if ((sb += lnum) > 31) {
    302 					sp++;
    303 					sb -= 32;
    304 				}
    305 			}
    306 
    307 			/* Now aligned to 32-bits wrt dp */
    308 			for (cnt = full; cnt; cnt--, sp++) {
    309 				GETBITS(sp, sb, 32, tmp);
    310 				*dp++ = tmp;
    311 			}
    312 
    313 			if (rmask) {
    314 				GETBITS(sp, sb, rnum, tmp);
    315 				PUTBITS(tmp, 0, rnum, dp);
    316  			}
    317  		}
    318  	}
    319 }
    320 
    321 #endif /* _RASOPS_BITOPS_H_ */
    322