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Annotation of sys/dev/rasops/rasops32.c, Revision 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: }