1 /*
2 d_init.c
3
4 rasterization driver initialization
5
6 Copyright (C) 1996-1997 Id Software, Inc.
7
8 This program is free software; you can redistribute it and/or
9 modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 2
11 of the License, or (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
16
17 See the GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to:
21
22 Free Software Foundation, Inc.
23 59 Temple Place - Suite 330
24 Boston, MA 02111-1307, USA
25
26 */
27 #ifdef HAVE_CONFIG_H
28 # include "config.h"
29 #endif
30
31 #define NH_DEFINE
32 #include "namehack.h"
33
34 #include "QF/cvar.h"
35 #include "QF/render.h"
36
37 #include "compat.h"
38 #include "d_local.h"
39 #include "r_internal.h"
40 #include "vid_internal.h"
41
42 #define NUM_MIPS 4
43
44 surfcache_t *sw32_d_initial_rover;
45 qboolean sw32_d_roverwrapped;
46 int sw32_d_minmip;
47 float sw32_d_scalemip[NUM_MIPS - 1];
48
49 static float basemip[NUM_MIPS - 1] = { 1.0, 0.5 * 0.8, 0.25 * 0.8 };
50
51
52 float sw32_d_zitable[65536];
53
54
55 void
sw32_D_Init(void)56 sw32_D_Init (void)
57 {
58 sw32_r_drawpolys = false;
59 sw32_r_worldpolysbacktofront = false;
60
61 // LordHavoc: compute 1/zi table for use in rendering code everywhere
62 if (!sw32_d_zitable[1]) {
63 int i;
64 sw32_d_zitable[0] = 0;
65 for (i = 1;i < 65536;i++)
66 sw32_d_zitable[i] = (65536.0 * 65536.0 / (double) i);
67 }
68
69 vr_data.vid->surf_cache_size = sw32_D_SurfaceCacheForRes;
70 vr_data.vid->flush_caches = sw32_D_FlushCaches;
71 vr_data.vid->init_caches = sw32_D_InitCaches;
72
73 VID_InitBuffers ();
74 }
75
76 void
sw32_D_EnableBackBufferAccess(void)77 sw32_D_EnableBackBufferAccess (void)
78 {
79 VID_LockBuffer ();
80 }
81
82 void
sw32_D_TurnZOn(void)83 sw32_D_TurnZOn (void)
84 {
85 // not needed for software version
86 }
87
88 void
sw32_D_DisableBackBufferAccess(void)89 sw32_D_DisableBackBufferAccess (void)
90 {
91 VID_UnlockBuffer ();
92 }
93
94 void
sw32_D_SetupFrame(void)95 sw32_D_SetupFrame (void)
96 {
97 int i;
98
99 if (sw32_r_dowarp)
100 sw32_d_viewbuffer = sw32_r_warpbuffer;
101 else
102 sw32_d_viewbuffer = vid.buffer;
103
104 if (sw32_r_dowarp)
105 sw32_screenwidth = WARP_WIDTH;
106 else
107 sw32_screenwidth = vid.rowbytes / sw32_r_pixbytes;
108
109 sw32_d_roverwrapped = false;
110 sw32_d_initial_rover = sw32_sc_rover;
111
112 sw32_d_minmip = bound (0, d_mipcap->value, 3);
113
114 for (i = 0; i < (NUM_MIPS - 1); i++)
115 sw32_d_scalemip[i] = basemip[i] * d_mipscale->value;
116 }
117
118 void
sw32_D_UpdateRects(vrect_t * prect)119 sw32_D_UpdateRects (vrect_t *prect)
120 {
121 // the software driver draws these directly to the vid buffer
122 }
123