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Annotation of quakeworld/client/d_init.c, revision 1.1

1.1     ! root        1: /*
        !             2: Copyright (C) 1996-1997 Id Software, Inc.
        !             3: 
        !             4: This program is free software; you can redistribute it and/or
        !             5: modify it under the terms of the GNU General Public License
        !             6: as published by the Free Software Foundation; either version 2
        !             7: of the License, or (at your option) any later version.
        !             8: 
        !             9: This program is distributed in the hope that it will be useful,
        !            10: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            11: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
        !            12: 
        !            13: See the 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, write to the Free Software
        !            17: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
        !            18: 
        !            19: */
        !            20: // d_init.c: rasterization driver initialization
        !            21: 
        !            22: #include "quakedef.h"
        !            23: #include "d_local.h"
        !            24: 
        !            25: #define NUM_MIPS       4
        !            26: 
        !            27: cvar_t d_subdiv16 = {"d_subdiv16", "1"};
        !            28: cvar_t d_mipcap = {"d_mipcap", "0"};
        !            29: cvar_t d_mipscale = {"d_mipscale", "1"};
        !            30: 
        !            31: surfcache_t            *d_initial_rover;
        !            32: qboolean               d_roverwrapped;
        !            33: int                            d_minmip;
        !            34: float                  d_scalemip[NUM_MIPS-1];
        !            35: 
        !            36: static float   basemip[NUM_MIPS-1] = {1.0, 0.5*0.8, 0.25*0.8};
        !            37: 
        !            38: extern int                     d_aflatcolor;
        !            39: 
        !            40: void (*d_drawspans) (espan_t *pspan);
        !            41: 
        !            42: 
        !            43: /*
        !            44: ===============
        !            45: D_Init
        !            46: ===============
        !            47: */
        !            48: void D_Init (void)
        !            49: {
        !            50: 
        !            51:        r_skydirect = 1;
        !            52: 
        !            53:        Cvar_RegisterVariable (&d_subdiv16);
        !            54:        Cvar_RegisterVariable (&d_mipcap);
        !            55:        Cvar_RegisterVariable (&d_mipscale);
        !            56: 
        !            57:        r_drawpolys = false;
        !            58:        r_worldpolysbacktofront = false;
        !            59:        r_recursiveaffinetriangles = true;
        !            60:        r_pixbytes = 1;
        !            61:        r_aliasuvscale = 1.0;
        !            62: }
        !            63: 
        !            64: 
        !            65: /*
        !            66: ===============
        !            67: D_CopyRects
        !            68: ===============
        !            69: */
        !            70: void D_CopyRects (vrect_t *prects, int transparent)
        !            71: {
        !            72: 
        !            73: // this function is only required if the CPU doesn't have direct access to the
        !            74: // back buffer, and there's some driver interface function that the driver
        !            75: // doesn't support and requires Quake to do in software (such as drawing the
        !            76: // console); Quake will then draw into wherever the driver points vid.buffer
        !            77: // and will call this function before swapping buffers
        !            78: 
        !            79:        UNUSED(prects);
        !            80:        UNUSED(transparent);
        !            81: }
        !            82: 
        !            83: 
        !            84: /*
        !            85: ===============
        !            86: D_EnableBackBufferAccess
        !            87: ===============
        !            88: */
        !            89: void D_EnableBackBufferAccess (void)
        !            90: {
        !            91: 
        !            92:        VID_LockBuffer ();
        !            93: }
        !            94: 
        !            95: 
        !            96: /*
        !            97: ===============
        !            98: D_TurnZOn
        !            99: ===============
        !           100: */
        !           101: void D_TurnZOn (void)
        !           102: {
        !           103: // not needed for software version
        !           104: }
        !           105: 
        !           106: 
        !           107: /*
        !           108: ===============
        !           109: D_DisableBackBufferAccess
        !           110: ===============
        !           111: */
        !           112: void D_DisableBackBufferAccess (void)
        !           113: {
        !           114:        VID_UnlockBuffer ();
        !           115: }
        !           116: 
        !           117: 
        !           118: /*
        !           119: ===============
        !           120: D_SetupFrame
        !           121: ===============
        !           122: */
        !           123: void D_SetupFrame (void)
        !           124: {
        !           125:        int             i;
        !           126: 
        !           127:        if (r_dowarp)
        !           128:                d_viewbuffer = r_warpbuffer;
        !           129:        else
        !           130:                d_viewbuffer = (void *)(byte *)vid.buffer;
        !           131: 
        !           132:        if (r_dowarp)
        !           133:                screenwidth = WARP_WIDTH;
        !           134:        else
        !           135:                screenwidth = vid.rowbytes;
        !           136: 
        !           137:        d_roverwrapped = false;
        !           138:        d_initial_rover = sc_rover;
        !           139: 
        !           140:        d_minmip = d_mipcap.value;
        !           141:        if (d_minmip > 3)
        !           142:                d_minmip = 3;
        !           143:        else if (d_minmip < 0)
        !           144:                d_minmip = 0;
        !           145: 
        !           146:        for (i=0 ; i<(NUM_MIPS-1) ; i++)
        !           147:                d_scalemip[i] = basemip[i] * d_mipscale.value;
        !           148: 
        !           149: #if    id386
        !           150:                                if (d_subdiv16.value)
        !           151:                                        d_drawspans = D_DrawSpans16;
        !           152:                                else
        !           153:                                        d_drawspans = D_DrawSpans8;
        !           154: #else
        !           155:                                d_drawspans = D_DrawSpans8;
        !           156: #endif
        !           157: 
        !           158:        d_aflatcolor = 0;
        !           159: }
        !           160: 
        !           161: 
        !           162: /*
        !           163: ===============
        !           164: D_UpdateRects
        !           165: ===============
        !           166: */
        !           167: void D_UpdateRects (vrect_t *prect)
        !           168: {
        !           169: 
        !           170: // the software driver draws these directly to the vid buffer
        !           171: 
        !           172:        UNUSED(prect);
        !           173: }
        !           174: 

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