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rasops32.c revision 1.3 
      1 /*	 $NetBSD: rasops32.c,v 1.3 1999/04/26 04:27:47 ad Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1999 Andy Doran <ad (at) NetBSD.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  */
     29 
     30 #include "opt_rasops.h"
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: rasops32.c,v 1.3 1999/04/26 04:27:47 ad Exp $");
     33 
     34 #include <sys/types.h>
     35 #include <sys/param.h>
     36 #include <sys/systm.h>
     37 #include <sys/time.h>
     38 
     39 #include <dev/wscons/wsdisplayvar.h>
     40 #include <dev/wscons/wsconsio.h>
     41 #include <dev/rasops/rasops.h>
     42 
     43 static void 	rasops32_putchar __P((void *, int, int, u_int, long attr));
     44 void		rasops32_init __P((struct rasops_info *ri));
     45 
     46 
     47 /*
     48  * Initalize a 'rasops_info' descriptor for this depth.
     49  */
     50 void
     51 rasops32_init(ri)
     52 	struct rasops_info *ri;
     53 {
     54 
     55 	if (ri->ri_rnum == 0) {
     56 		ri->ri_rnum = 8;
     57 		ri->ri_rpos = 0;
     58 		ri->ri_gnum = 8;
     59 		ri->ri_gpos = 8;
     60 		ri->ri_bnum = 8;
     61 		ri->ri_bpos = 16;
     62 	}
     63 
     64 	ri->ri_ops.putchar = rasops32_putchar;
     65 }
     66 
     67 
     68 /*
     69  * Paint a single character.
     70  */
     71 static void
     72 rasops32_putchar(cookie, row, col, uc, attr)
     73 	void *cookie;
     74 	int row, col;
     75 	u_int uc;
     76 	long attr;
     77 {
     78 	struct rasops_info *ri;
     79 	int32_t *dp, *rp, clr[2];
     80 	u_char *fr;
     81 	int width, height, cnt, fs, fb;
     82 
     83 	ri = (struct rasops_info *)cookie;
     84 
     85 #ifdef RASOPS_CLIPPING
     86 	/* Catches 'row < 0' case too */
     87 	if ((unsigned)row >= (unsigned)ri->ri_rows)
     88 		return;
     89 
     90 	if ((unsigned)col >= (unsigned)ri->ri_cols)
     91 		return;
     92 #endif
     93 
     94 	rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
     95 
     96 	height = ri->ri_font->fontheight;
     97 	width = ri->ri_font->fontwidth;
     98 
     99 	clr[0] = ri->ri_devcmap[(attr >> 16) & 15];
    100 	clr[1] = ri->ri_devcmap[(attr >> 24) & 15];
    101 
    102 	if (uc == ' ') {
    103 		while (height--) {
    104 			dp = rp;
    105 			DELTA(rp, ri->ri_stride, int32_t *);
    106 
    107 			for (cnt = width; cnt; cnt--)
    108 				*dp++ = clr[0];
    109 		}
    110 	} else {
    111 		uc -= ri->ri_font->firstchar;
    112 		fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
    113 		fs = ri->ri_font->stride;
    114 
    115 		while (height--) {
    116 			dp = rp;
    117 			fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) | (fr[0] << 24);
    118 			fr += fs;
    119 			DELTA(rp, ri->ri_stride, int32_t *);
    120 
    121 			for (cnt = width; cnt; cnt--) {
    122 				*dp++ = clr[(fb >> 31) & 1];
    123 				fb <<= 1;
    124 			}
    125 		}
    126 	}
    127 
    128 	/* Do underline */
    129 	if (attr & 1) {
    130 		DELTA(rp, -(ri->ri_stride << 1), int32_t *);
    131 
    132 		while (width--)
    133 			*rp++ = clr[1];
    134 	}
    135 }
    136