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Annotation of sys/dev/rasops/rasops32.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: rasops32.c,v 1.4 2002/07/27 22:17:49 miod Exp $       */
                      2: /*     $NetBSD: rasops32.c,v 1.7 2000/04/12 14:22:29 pk Exp $  */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1999 The NetBSD Foundation, Inc.
                      6:  * All rights reserved.
                      7:  *
                      8:  * This code is derived from software contributed to The NetBSD Foundation
                      9:  * by Andrew Doran.
                     10:  *
                     11:  * Redistribution and use in source and binary forms, with or without
                     12:  * modification, are permitted provided that the following conditions
                     13:  * are met:
                     14:  * 1. Redistributions of source code must retain the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer.
                     16:  * 2. Redistributions in binary form must reproduce the above copyright
                     17:  *    notice, this list of conditions and the following disclaimer in the
                     18:  *    documentation and/or other materials provided with the distribution.
                     19:  * 3. All advertising materials mentioning features or use of this software
                     20:  *    must display the following acknowledgement:
                     21:  *     This product includes software developed by the NetBSD
                     22:  *     Foundation, Inc. and its contributors.
                     23:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     24:  *    contributors may be used to endorse or promote products derived
                     25:  *    from this software without specific prior written permission.
                     26:  *
                     27:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     28:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     29:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     30:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     31:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     32:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     33:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     34:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     35:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     36:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     37:  * POSSIBILITY OF SUCH DAMAGE.
                     38:  */
                     39:
                     40: #include <sys/param.h>
                     41: #include <sys/systm.h>
                     42: #include <sys/time.h>
                     43:
                     44: #include <dev/wscons/wsdisplayvar.h>
                     45: #include <dev/wscons/wsconsio.h>
                     46: #include <dev/rasops/rasops.h>
                     47:
                     48: void   rasops32_putchar(void *, int, int, u_int, long);
                     49:
                     50: /*
                     51:  * Initialize a 'rasops_info' descriptor for this depth.
                     52:  */
                     53: void
                     54: rasops32_init(ri)
                     55:        struct rasops_info *ri;
                     56: {
                     57:
                     58:        if (ri->ri_rnum == 0) {
                     59:                ri->ri_rnum = 8;
                     60:                ri->ri_rpos = 0;
                     61:                ri->ri_gnum = 8;
                     62:                ri->ri_gpos = 8;
                     63:                ri->ri_bnum = 8;
                     64:                ri->ri_bpos = 16;
                     65:        }
                     66:
                     67:        ri->ri_ops.putchar = rasops32_putchar;
                     68: }
                     69:
                     70: /*
                     71:  * Paint a single character.
                     72:  */
                     73: void
                     74: rasops32_putchar(cookie, row, col, uc, attr)
                     75:        void *cookie;
                     76:        int row, col;
                     77:        u_int uc;
                     78:        long attr;
                     79: {
                     80:        int width, height, cnt, fs, fb, clr[2];
                     81:        struct rasops_info *ri;
                     82:        int32_t *dp, *rp;
                     83:        u_char *fr;
                     84:
                     85:        ri = (struct rasops_info *)cookie;
                     86:
                     87: #ifdef RASOPS_CLIPPING
                     88:        /* Catches 'row < 0' case too */
                     89:        if ((unsigned)row >= (unsigned)ri->ri_rows)
                     90:                return;
                     91:
                     92:        if ((unsigned)col >= (unsigned)ri->ri_cols)
                     93:                return;
                     94: #endif
                     95:
                     96:        rp = (int32_t *)(ri->ri_bits + row*ri->ri_yscale + col*ri->ri_xscale);
                     97:
                     98:        height = ri->ri_font->fontheight;
                     99:        width = ri->ri_font->fontwidth;
                    100:
                    101:        clr[0] = ri->ri_devcmap[(attr >> 16) & 0xf];
                    102:        clr[1] = ri->ri_devcmap[(attr >> 24) & 0xf];
                    103:
                    104:        if (uc == ' ') {
                    105:                while (height--) {
                    106:                        dp = rp;
                    107:                        DELTA(rp, ri->ri_stride, int32_t *);
                    108:
                    109:                        for (cnt = width; cnt; cnt--)
                    110:                                *dp++ = clr[0];
                    111:                }
                    112:        } else {
                    113:                uc -= ri->ri_font->firstchar;
                    114:                fr = (u_char *)ri->ri_font->data + uc * ri->ri_fontscale;
                    115:                fs = ri->ri_font->stride;
                    116:
                    117:                while (height--) {
                    118:                        dp = rp;
                    119:                        fb = fr[3] | (fr[2] << 8) | (fr[1] << 16) |
                    120:                            (fr[0] << 24);
                    121:                        fr += fs;
                    122:                        DELTA(rp, ri->ri_stride, int32_t *);
                    123:
                    124:                        for (cnt = width; cnt; cnt--) {
                    125:                                *dp++ = clr[(fb >> 31) & 1];
                    126:                                fb <<= 1;
                    127:                        }
                    128:                }
                    129:        }
                    130:
                    131:        /* Do underline */
                    132:        if ((attr & 1) != 0) {
                    133:                DELTA(rp, -(ri->ri_stride << 1), int32_t *);
                    134:
                    135:                while (width--)
                    136:                        *rp++ = clr[1];
                    137:        }
                    138: }