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rasops_bitops.h revision 1.12.18.1 
      1 /* 	$NetBSD: rasops_bitops.h,v 1.12.18.1 2013/06/23 06:20:21 tls 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _RASOPS_BITOPS_H_
     33 #define _RASOPS_BITOPS_H_ 1
     34 
     35 /*
     36  * Erase columns.
     37  */
     38 static void
     39 NAME(erasecols)(void *cookie, int row, int col, int num, long attr)
     40 {
     41 	int lmask, rmask, lclr, rclr, clr;
     42 	struct rasops_info *ri;
     43 	int32_t *dp, *rp, *hrp = NULL, *hp = NULL, tmp;
     44 	int height, cnt;
     45 
     46 	ri = (struct rasops_info *)cookie;
     47 
     48 #ifdef RASOPS_CLIPPING
     49 	if ((unsigned)row >= (unsigned)ri->ri_rows)
     50 		return;
     51 
     52 	if (col < 0) {
     53 		num += col;
     54 		col = 0;
     55 	}
     56 
     57 	if ((col + num) > ri->ri_cols)
     58 		num = ri->ri_cols - col;
     59 
     60 	if (num <= 0)
     61 		return;
     62 #endif
     63 	col *= ri->ri_font->fontwidth << PIXEL_SHIFT;
     64 	num *= ri->ri_font->fontwidth << PIXEL_SHIFT;
     65 	height = ri->ri_font->fontheight;
     66 	clr = ri->ri_devcmap[(attr >> 16) & 0xf];
     67 	rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + ((col >> 3) & ~3));
     68 	if (ri->ri_hwbits)
     69 		hrp = (int32_t *)(ri->ri_hwbits + row*ri->ri_yscale +
     70 		    ((col >> 3) & ~3));
     71 	if ((col & 31) + num <= 32) {
     72 		lmask = ~rasops_pmask[col & 31][num];
     73 		lclr = clr & ~lmask;
     74 
     75 		while (height--) {
     76 			dp = rp;
     77 			DELTA(rp, ri->ri_stride, int32_t *);
     78 
     79 			tmp = (*dp & lmask) | lclr;
     80 			*dp = tmp;
     81 			if (ri->ri_hwbits) {
     82 				*hrp = tmp;
     83 				DELTA(hrp, ri->ri_stride, int32_t *);
     84 			}
     85 		}
     86 	} else {
     87 		lmask = rasops_rmask[col & 31];
     88 		rmask = rasops_lmask[(col + num) & 31];
     89 
     90 		if (lmask)
     91 			num = (num - (32 - (col & 31))) >> 5;
     92 		else
     93 			num = num >> 5;
     94 
     95 		lclr = clr & ~lmask;
     96 		rclr = clr & ~rmask;
     97 
     98 		while (height--) {
     99 			dp = rp;
    100 			DELTA(rp, ri->ri_stride, int32_t *);
    101 			if (ri->ri_hwbits) {
    102 				hp = hrp;
    103 				DELTA(hrp, ri->ri_stride, int32_t *);
    104 			}
    105 
    106 			if (lmask) {
    107 				tmp = (*dp & lmask) | lclr;
    108 				*dp = tmp;
    109 				dp++;
    110 				if (ri->ri_hwbits) {
    111 					*hp = tmp;
    112 					hp++;
    113 				}
    114 			}
    115 
    116 			for (cnt = num; cnt > 0; cnt--)
    117 				*dp++ = clr;
    118 			if (ri->ri_hwbits) {
    119 				for (cnt = num; cnt > 0; cnt--)
    120 					*hp++ = clr;
    121 			}
    122 
    123 			if (rmask) {
    124 				tmp = (*dp & rmask) | rclr;
    125 				*dp = tmp;
    126 				if (ri->ri_hwbits)
    127 					*hp = tmp;
    128 			}
    129 		}
    130 	}
    131 }
    132 
    133 /*
    134  * Actually paint the cursor.
    135  */
    136 static void
    137 NAME(do_cursor)(struct rasops_info *ri)
    138 {
    139 	int lmask, rmask, height, row, col, num;
    140 	int32_t *dp, *rp, *hp = NULL, *hrp = NULL, tmp;
    141 
    142 	row = ri->ri_crow;
    143 	col = ri->ri_ccol * ri->ri_font->fontwidth << PIXEL_SHIFT;
    144 	height = ri->ri_font->fontheight;
    145 	num = ri->ri_font->fontwidth << PIXEL_SHIFT;
    146 	rp = (int32_t *)(ri->ri_bits + row * ri->ri_yscale + ((col >> 3) & ~3));
    147 	if (ri->ri_hwbits)
    148 		hrp = (int32_t *)(ri->ri_hwbits + row * ri->ri_yscale +
    149 		    ((col >> 3) & ~3));
    150 
    151 	if ((col & 31) + num <= 32) {
    152 		lmask = rasops_pmask[col & 31][num];
    153 
    154 		while (height--) {
    155 			dp = rp;
    156 			DELTA(rp, ri->ri_stride, int32_t *);
    157 			*dp ^= lmask;
    158 		}
    159 		if (ri->ri_hwbits) {
    160 			height = ri->ri_font->fontheight;
    161 			while (height--) {
    162 				hp = hrp;
    163 				DELTA(hrp, ri->ri_stride, int32_t *);
    164 				*hp ^= lmask;
    165 			}
    166 		}
    167 	} else {
    168 		lmask = ~rasops_rmask[col & 31];
    169 		rmask = ~rasops_lmask[(col + num) & 31];
    170 
    171 		while (height--) {
    172 			dp = rp;
    173 			DELTA(rp, ri->ri_stride, int32_t *);
    174 			if (ri->ri_hwbits) {
    175 				hp = hrp;
    176 				DELTA(hrp, ri->ri_stride, int32_t *);
    177 			}
    178 			if (lmask != -1) {
    179 				tmp = *dp ^ lmask;
    180 				*dp = tmp;
    181 				dp++;
    182 				if (ri->ri_hwbits) {
    183 					*hp = tmp;
    184 					hp++;
    185 				}
    186 			}
    187 
    188 			if (rmask != -1) {
    189 				tmp = *dp ^ rmask;
    190 				*dp = tmp;
    191 				if (ri->ri_hwbits)
    192 					*hp = tmp;
    193 			}
    194 		}
    195 	}
    196 }
    197 
    198 /*
    199  * Copy columns. Ick!
    200  */
    201 static void
    202 NAME(copycols)(void *cookie, int row, int src, int dst, int num)
    203 {
    204 	int tmp, lmask, rmask, height, lnum, rnum, sb, db, cnt, full;
    205 	int32_t *sp, *dp, *srp, *drp, *dhp = NULL, *hp = NULL;
    206 	struct rasops_info *ri;
    207 
    208 	ri = (struct rasops_info *)cookie;
    209 
    210 #ifdef RASOPS_CLIPPING
    211 	if (dst == src)
    212 		return;
    213 
    214 	/* Catches < 0 case too */
    215 	if ((unsigned)row >= (unsigned)ri->ri_rows)
    216 		return;
    217 
    218 	if (src < 0) {
    219 		num += src;
    220 		src = 0;
    221 	}
    222 
    223 	if ((src + num) > ri->ri_cols)
    224 		num = ri->ri_cols - src;
    225 
    226 	if (dst < 0) {
    227 		num += dst;
    228 		dst = 0;
    229 	}
    230 
    231 	if ((dst + num) > ri->ri_cols)
    232 		num = ri->ri_cols - dst;
    233 
    234 	if (num <= 0)
    235 		return;
    236 #endif
    237 
    238 	cnt = ri->ri_font->fontwidth << PIXEL_SHIFT;
    239 	src *= cnt;
    240 	dst *= cnt;
    241 	num *= cnt;
    242 	row *= ri->ri_yscale;
    243 	height = ri->ri_font->fontheight;
    244 	db = dst & 31;
    245 
    246 	if (db + num <= 32) {
    247 		/* Destination is contained within a single word */
    248 		srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
    249 		drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
    250 		if (ri->ri_hwbits)
    251 			dhp = (int32_t *)(ri->ri_hwbits + row +
    252 			    ((dst >> 3) & ~3));
    253 		sb = src & 31;
    254 
    255 		while (height--) {
    256 			GETBITS(srp, sb, num, tmp);
    257 			PUTBITS(tmp, db, num, drp);
    258 			if (ri->ri_hwbits) {
    259 				PUTBITS(tmp, db, num, dhp);
    260 				DELTA(dhp, ri->ri_stride, int32_t *);
    261 			}
    262 			DELTA(srp, ri->ri_stride, int32_t *);
    263 			DELTA(drp, ri->ri_stride, int32_t *);
    264 		}
    265 
    266 		return;
    267 	}
    268 
    269 	lmask = rasops_rmask[db];
    270 	rmask = rasops_lmask[(dst + num) & 31];
    271 	lnum = (32 - db) & 31;
    272 	rnum = (dst + num) & 31;
    273 
    274 	if (lmask)
    275 		full = (num - (32 - (dst & 31))) >> 5;
    276 	else
    277 		full = num >> 5;
    278 
    279 	if (src < dst && src + num > dst) {
    280 		/* Copy right-to-left */
    281 		sb = src & 31;
    282 		src = src + num;
    283 		dst = dst + num;
    284 		srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
    285 		drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
    286 		if (ri->ri_hwbits)
    287 			dhp = (int32_t *)(ri->ri_hwbits + row +
    288 			    ((dst >> 3) & ~3));
    289 
    290 		src = src & 31;
    291 		rnum = 32 - lnum;
    292 		db = dst & 31;
    293 
    294 		if ((src -= db) < 0) {
    295 			srp--;
    296 			src += 32;
    297 		}
    298 
    299 		while (height--) {
    300 			sp = srp;
    301 			dp = drp;
    302 			if (ri->ri_hwbits) {
    303 				hp = dhp;
    304 				DELTA(dhp, ri->ri_stride, int32_t *);
    305 			}
    306 			DELTA(srp, ri->ri_stride, int32_t *);
    307 			DELTA(drp, ri->ri_stride, int32_t *);
    308 
    309 			if (db) {
    310 				GETBITS(sp, src, db, tmp);
    311 				PUTBITS(tmp, 0, db, dp);
    312 				if (ri->ri_hwbits) {
    313 					PUTBITS(tmp, 0, db, hp);
    314 					hp--;
    315 				}
    316 				dp--;
    317 				sp--;
    318 			}
    319 
    320 			/* Now aligned to 32-bits wrt dp */
    321 			for (cnt = full; cnt; cnt--, sp--) {
    322 				GETBITS(sp, src, 32, tmp);
    323 				*dp-- = tmp;
    324 				if (ri->ri_hwbits)
    325 					*hp-- = tmp;
    326 			}
    327 
    328 			if (lmask) {
    329 #if 0
    330 				if (src > sb)
    331 					sp++;
    332 #endif
    333 				GETBITS(sp, sb, lnum, tmp);
    334 				PUTBITS(tmp, rnum, lnum, dp);
    335 				if (ri->ri_hwbits)
    336 					PUTBITS(tmp, rnum, lnum, hp);
    337  			}
    338  		}
    339 	} else {
    340 		/* Copy left-to-right */
    341 		srp = (int32_t *)(ri->ri_bits + row + ((src >> 3) & ~3));
    342 		drp = (int32_t *)(ri->ri_bits + row + ((dst >> 3) & ~3));
    343 		if (ri->ri_hwbits)
    344 			dhp = (int32_t *)(ri->ri_hwbits + row +
    345 			    ((dst >> 3) & ~3));
    346 		db = dst & 31;
    347 
    348 		while (height--) {
    349 			sb = src & 31;
    350 			sp = srp;
    351 			dp = drp;
    352 			if (ri->ri_hwbits) {
    353 				hp = dhp;
    354 				DELTA(dhp, ri->ri_stride, int32_t *);
    355 			}
    356 			DELTA(srp, ri->ri_stride, int32_t *);
    357 			DELTA(drp, ri->ri_stride, int32_t *);
    358 
    359 			if (lmask) {
    360 				GETBITS(sp, sb, lnum, tmp);
    361 				PUTBITS(tmp, db, lnum, dp);
    362 				dp++;
    363 				if (ri->ri_hwbits) {
    364 					PUTBITS(tmp, db, lnum, hp);
    365 					hp++;
    366 				}
    367 
    368 				if ((sb += lnum) > 31) {
    369 					sp++;
    370 					sb -= 32;
    371 				}
    372 			}
    373 
    374 			/* Now aligned to 32-bits wrt dp */
    375 			for (cnt = full; cnt; cnt--, sp++) {
    376 				GETBITS(sp, sb, 32, tmp);
    377 				*dp++ = tmp;
    378 				if (ri->ri_hwbits)
    379 					*hp++ = tmp;
    380 			}
    381 
    382 			if (rmask) {
    383 				GETBITS(sp, sb, rnum, tmp);
    384 				PUTBITS(tmp, 0, rnum, dp);
    385 				if (ri->ri_hwbits)
    386 					PUTBITS(tmp, 0, rnum, hp);
    387  			}
    388  		}
    389  	}
    390 }
    391 
    392 #endif /* _RASOPS_BITOPS_H_ */
    393