139 lines
2.8 KiB
C
139 lines
2.8 KiB
C
/*
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d_init.c
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rasterization driver initialization
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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static const char rcsid[] =
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"$Id$";
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "QF/cvar.h"
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#include "QF/render.h"
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#include "compat.h"
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#include "d_local.h"
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#include "r_cvar.h"
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#define NUM_MIPS 4
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surfcache_t *d_initial_rover;
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qboolean d_roverwrapped;
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int d_minmip;
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float d_scalemip[NUM_MIPS - 1];
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static float basemip[NUM_MIPS - 1] = { 1.0, 0.5 * 0.8, 0.25 * 0.8 };
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float d_zitable[65536];
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void
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D_Init (void)
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{
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r_skydirect = 1;
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r_drawpolys = false;
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r_worldpolysbacktofront = false;
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r_aliasuvscale = 1.0;
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// LordHavoc: compute 1/zi table for use in rendering code everywhere
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if (!d_zitable[1]) {
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int i;
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d_zitable[0] = 0;
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for (i = 1;i < 65536;i++)
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d_zitable[i] = (65536.0 * 65536.0 / (double) i);
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}
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vid.surf_cache_size = D_SurfaceCacheForRes;
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vid.flush_caches = D_FlushCaches;
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vid.init_caches = D_InitCaches;
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VID_InitBuffers ();
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}
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void
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D_CopyRects (vrect_t *prects, int transparent)
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{
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/*
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this function is only required if the CPU doesn't have direct access to the
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back buffer, and there's some driver interface function that the driver
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doesn't support and requires Quake to do in software (such as drawing the
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console); Quake will then draw into wherever the driver points vid.buffer
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and will call this function before swapping buffers
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*/
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}
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void
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D_EnableBackBufferAccess (void)
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{
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VID_LockBuffer ();
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}
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void
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D_TurnZOn (void)
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{
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// not needed for software version
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}
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void
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D_DisableBackBufferAccess (void)
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{
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VID_UnlockBuffer ();
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}
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void
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D_SetupFrame (void)
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{
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int i;
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if (r_dowarp)
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d_viewbuffer = r_warpbuffer;
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else
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d_viewbuffer = vid.buffer;
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if (r_dowarp)
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screenwidth = WARP_WIDTH;
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else
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screenwidth = vid.rowbytes / r_pixbytes;
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d_roverwrapped = false;
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d_initial_rover = sc_rover;
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d_minmip = bound (0, d_mipcap->value, 3);
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for (i = 0; i < (NUM_MIPS - 1); i++)
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d_scalemip[i] = basemip[i] * d_mipscale->value;
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d_aflatcolor = 0;
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}
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void
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D_UpdateRects (vrect_t *prect)
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{
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// the software driver draws these directly to the vid buffer
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}
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