1 /*
2
3 Copyright (C) 2015-2018 Night Dive Studios, LLC.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 */
19 /*
20 * $Source: r:/prj/lib/src/2d/RCS/fl8hlin.c $
21 * $Revision: 1.8 $
22 * $Author: lmfeeney $
23 * $Date: 1994/08/12 01:09:33 $
24 *
25 * Routines for horizontal drawing lines into a flat 8 canvas.
26 *
27 * This file is part of the 2d library.
28 *
29 * $Log: fl8hlin.c $
30 * Revision 1.8 1994/08/12 01:09:33 lmfeeney
31 * get fill/solid from right place
32 *
33 * Revision 1.7 1994/06/14 00:04:22 lmfeeney
34 * fixed stupid error in xor lines
35 *
36 * Revision 1.6 1994/06/11 01:46:09 lmfeeney
37 * unclipped flat8 line drawers routines for each fill type
38 * canvas values as parameters
39 *
40 * Revision 1.5 1993/10/19 09:50:34 kaboom
41 * Replaced #include <grd.h" with new headers split from grd.h.
42 *
43 * Revision 1.4 1993/10/08 01:15:17 kaboom
44 * Changed quotes in #include liness to angle brackets for Watcom problem.
45 *
46 * Revision 1.3 1993/05/04 18:43:15 kaboom
47 * Changed hline to be inclusive of its endpoints.
48 *
49 * Revision 1.2 1993/03/02 19:38:32 kaboom
50 * Changed not to draw rightmost pixel.
51 *
52 * Revision 1.1 1993/02/22 14:44:24 kaboom
53 * Initial revision
54 */
55
56 #include "cnvdat.h"
57 #include "ctxmac.h"
58 #include "fill.h"
59 #include "lg.h"
60 #include <string.h>
61
62 /* draw an unclipped horizontal line with integral coordinates. */
63
64 // MLA #pragma off (unreferenced)
65
66 /* clut should be in _ns everywhere, it doesn't need its own function */
67
gri_flat8_uhline_ns(short x0,short y0,short x1,long c,long parm)68 void gri_flat8_uhline_ns(short x0, short y0, short x1, long c, long parm) {
69 uchar *p;
70 short t;
71
72 if (x0 > x1) {
73 t = x0;
74 x0 = x1;
75 x1 = t;
76 }
77 if (gr_get_fill_type() == FILL_SOLID)
78 c = (uchar)parm;
79 p = grd_bm.bits + y0 * grd_bm.row + x0;
80 memset(p, c, x1 - x0 + 1);
81 }
82
gri_flat8_uhline_clut(short x0,short y0,short x1,long c,long parm)83 void gri_flat8_uhline_clut(short x0, short y0, short x1, long c, long parm) {
84 uchar *p;
85 short t;
86
87 if (x0 > x1) {
88 t = x0;
89 x0 = x1;
90 x1 = t;
91 }
92
93 c = (long)(((uchar *)parm)[c]);
94 p = grd_bm.bits + y0 * grd_bm.row + x0;
95 memset(p, c, x1 - x0 + 1);
96 }
97
gri_flat8_uhline_xor(short x0,short y0,short x1,long c,long parm)98 void gri_flat8_uhline_xor(short x0, short y0, short x1, long c, long parm) {
99 uchar *p;
100 short t;
101
102 if (x0 > x1) {
103 t = x0;
104 x0 = x1;
105 x1 = t;
106 }
107
108 for (p = grd_bm.bits + y0 * grd_bm.row + x0; x0 <= x1; p++, x0++)
109 *p = *p ^ c;
110 }
111
112 /* punt */
gri_flat8_uhline_blend(short x0,short y0,short x1,long c,long parm)113 void gri_flat8_uhline_blend(short x0, short y0, short x1, long c, long parm) {
114 uchar *p;
115 short t;
116
117 if (x0 > x1) {
118 t = x0;
119 x0 = x1;
120 x1 = t;
121 }
122 p = grd_bm.bits + y0 * grd_bm.row + x0;
123 memset(p, c, x1 - x0 + 1);
124 }
125