mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-25 13:32:01 +00:00
175 lines
3.2 KiB
C
175 lines
3.2 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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$Id$
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*/
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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 "bothdefs.h"
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#include "d_local.h"
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#define NUM_MIPS 4
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cvar_t *d_subdiv16;
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cvar_t *d_mipcap;
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cvar_t *d_mipscale;
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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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extern int d_aflatcolor;
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void (*d_drawspans) (espan_t *pspan);
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/*
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D_Init
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*/
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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_recursiveaffinetriangles = true;
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r_pixbytes = 1;
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r_aliasuvscale = 1.0;
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}
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void
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D_Init_Cvars (void)
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{
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d_subdiv16 = Cvar_Get ("d_subdiv16", "1", CVAR_NONE, "Set to enable extreme perspective correction");
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d_mipcap = Cvar_Get ("d_mipcap", "0", CVAR_NONE, "Detail level. 0 is highest, 3 is lowest.");
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d_mipscale = Cvar_Get ("d_mipscale", "1", CVAR_NONE, "Detail level of objects. 0 is highest, 3 is lowest.");
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}
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/*
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D_CopyRects
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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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// 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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UNUSED (prects);
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UNUSED (transparent);
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}
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/*
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D_EnableBackBufferAccess
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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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/*
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D_TurnZOn
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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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/*
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D_DisableBackBufferAccess
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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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/*
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D_SetupFrame
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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 = (void *) (byte *) 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;
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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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#ifdef USE_INTEL_ASM
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if (d_subdiv16->int_val)
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d_drawspans = D_DrawSpans16;
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else
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d_drawspans = D_DrawSpans8;
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#else
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d_drawspans = D_DrawSpans8;
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#endif
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d_aflatcolor = 0;
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}
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/*
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D_UpdateRects
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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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UNUSED (prect);
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}
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