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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | /* |
| 2 | Copyright (C) 1996-1997 Id Software, Inc. |
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| 3 | |||
| 4 | This program is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU General Public License |
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| 6 | as published by the Free Software Foundation; either version 2 |
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| 7 | of the License, or (at your option) any later version. |
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| 8 | |||
| 9 | This program is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 12 | |||
| 13 | See the GNU General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU General Public License |
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| 16 | along with this program; if not, write to the Free Software |
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| 17 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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| 18 | |||
| 19 | */ |
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| 20 | // d_init.c: rasterization driver initialization |
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| 21 | |||
| 22 | #include "quakedef.h" |
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| 23 | #include "d_local.h" |
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| 24 | |||
| 25 | #define NUM_MIPS 4 |
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| 26 | |||
| 27 | cvar_t d_subdiv16 = {"d_subdiv16", "1"}; |
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| 28 | cvar_t d_mipcap = {"d_mipcap", "0"}; |
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| 29 | cvar_t d_mipscale = {"d_mipscale", "1"}; |
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| 30 | |||
| 31 | surfcache_t *d_initial_rover; |
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| 32 | qboolean d_roverwrapped; |
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| 33 | int d_minmip; |
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| 34 | float d_scalemip[NUM_MIPS-1]; |
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| 35 | |||
| 36 | static float basemip[NUM_MIPS-1] = {1.0, 0.5*0.8, 0.25*0.8}; |
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| 37 | |||
| 38 | extern int d_aflatcolor; |
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| 39 | |||
| 40 | void (*d_drawspans) (espan_t *pspan); |
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| 41 | |||
| 42 | |||
| 43 | /* |
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| 44 | =============== |
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| 45 | D_Init |
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| 46 | =============== |
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| 47 | */ |
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| 48 | void D_Init (void) |
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| 49 | { |
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| 50 | |||
| 51 | r_skydirect = 1; |
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| 52 | |||
| 53 | Cvar_RegisterVariable (&d_subdiv16); |
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| 54 | Cvar_RegisterVariable (&d_mipcap); |
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| 55 | Cvar_RegisterVariable (&d_mipscale); |
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| 56 | |||
| 57 | r_drawpolys = false; |
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| 58 | r_worldpolysbacktofront = false; |
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| 59 | r_recursiveaffinetriangles = true; |
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| 60 | r_pixbytes = 1; |
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| 61 | r_aliasuvscale = 1.0; |
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| 62 | } |
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| 63 | |||
| 64 | |||
| 65 | /* |
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| 66 | =============== |
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| 67 | D_CopyRects |
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| 68 | =============== |
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| 69 | */ |
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| 70 | void D_CopyRects (vrect_t *prects, int transparent) |
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| 71 | { |
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| 72 | |||
| 73 | // this function is only required if the CPU doesn't have direct access to the |
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| 74 | // back buffer, and there's some driver interface function that the driver |
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| 75 | // doesn't support and requires Quake to do in software (such as drawing the |
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| 76 | // console); Quake will then draw into wherever the driver points vid.buffer |
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| 77 | // and will call this function before swapping buffers |
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| 78 | |||
| 79 | UNUSED(prects); |
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| 80 | UNUSED(transparent); |
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| 81 | } |
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| 82 | |||
| 83 | |||
| 84 | /* |
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| 85 | =============== |
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| 86 | D_EnableBackBufferAccess |
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| 87 | =============== |
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| 88 | */ |
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| 89 | void D_EnableBackBufferAccess (void) |
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| 90 | { |
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| 91 | VID_LockBuffer (); |
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| 92 | } |
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| 93 | |||
| 94 | |||
| 95 | /* |
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| 96 | =============== |
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| 97 | D_TurnZOn |
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| 98 | =============== |
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| 99 | */ |
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| 100 | void D_TurnZOn (void) |
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| 101 | { |
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| 102 | // not needed for software version |
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| 103 | } |
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| 104 | |||
| 105 | |||
| 106 | /* |
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| 107 | =============== |
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| 108 | D_DisableBackBufferAccess |
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| 109 | =============== |
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| 110 | */ |
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| 111 | void D_DisableBackBufferAccess (void) |
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| 112 | { |
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| 113 | VID_UnlockBuffer (); |
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| 114 | } |
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| 115 | |||
| 116 | |||
| 117 | /* |
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| 118 | =============== |
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| 119 | D_SetupFrame |
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| 120 | =============== |
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| 121 | */ |
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| 122 | void D_SetupFrame (void) |
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| 123 | { |
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| 124 | int i; |
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| 125 | |||
| 126 | if (r_dowarp) |
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| 127 | d_viewbuffer = r_warpbuffer; |
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| 128 | else |
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| 129 | d_viewbuffer = (void *)(byte *)vid.buffer; |
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| 130 | |||
| 131 | if (r_dowarp) |
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| 132 | screenwidth = WARP_WIDTH; |
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| 133 | else |
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| 134 | screenwidth = vid.rowbytes; |
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| 135 | |||
| 136 | d_roverwrapped = false; |
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| 137 | d_initial_rover = sc_rover; |
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| 138 | |||
| 139 | d_minmip = d_mipcap.value; |
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| 140 | if (d_minmip > 3) |
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| 141 | d_minmip = 3; |
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| 142 | else if (d_minmip < 0) |
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| 143 | d_minmip = 0; |
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| 144 | |||
| 145 | for (i=0 ; i<(NUM_MIPS-1) ; i++) |
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| 146 | d_scalemip[i] = basemip[i] * d_mipscale.value; |
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| 147 | |||
| 148 | #if id386 |
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| 149 | if (d_subdiv16.value) |
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| 150 | d_drawspans = D_DrawSpans16; |
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| 151 | else |
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| 152 | d_drawspans = D_DrawSpans8; |
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| 153 | #else |
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| 154 | d_drawspans = D_DrawSpans8; |
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| 155 | #endif |
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| 156 | |||
| 157 | d_aflatcolor = 0; |
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| 158 | } |
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| 159 | |||
| 160 | |||
| 161 | /* |
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| 162 | =============== |
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| 163 | D_UpdateRects |
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| 164 | =============== |
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| 165 | */ |
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| 166 | void D_UpdateRects (vrect_t *prect) |
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| 167 | { |
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| 168 | |||
| 169 | // the software driver draws these directly to the vid buffer |
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| 170 | |||
| 171 | UNUSED(prect); |
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| 172 | } |
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| 173 |