ref: aff29f25c0e72554e533162fc4d2ba69a8009fdb
dir: /QW/client/d_init.c/
/*
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// d_init.c: rasterization driver initialization
#include "quakedef.h"
#include "d_local.h"
#define NUM_MIPS 4
cvar_t d_subdiv16 = {"d_subdiv16", "1"};
cvar_t d_mipcap = {"d_mipcap", "0"};
cvar_t d_mipscale = {"d_mipscale", "1"};
surfcache_t *d_initial_rover;
qboolean d_roverwrapped;
int d_minmip;
float d_scalemip[NUM_MIPS-1];
static float basemip[NUM_MIPS-1] = {1.0, 0.5*0.8, 0.25*0.8};
extern int d_aflatcolor;
void (*d_drawspans) (espan_t *pspan);
/*
===============
D_Init
===============
*/
void D_Init (void)
{
r_skydirect = 1;
Cvar_RegisterVariable (&d_subdiv16);
Cvar_RegisterVariable (&d_mipcap);
Cvar_RegisterVariable (&d_mipscale);
r_drawpolys = false;
r_worldpolysbacktofront = false;
r_recursiveaffinetriangles = true;
r_pixbytes = 1;
r_aliasuvscale = 1.0;
}
/*
===============
D_CopyRects
===============
*/
void D_CopyRects (vrect_t *prects, int transparent)
{
// this function is only required if the CPU doesn't have direct access to the
// back buffer, and there's some driver interface function that the driver
// doesn't support and requires Quake to do in software (such as drawing the
// console); Quake will then draw into wherever the driver points vid.buffer
// and will call this function before swapping buffers
UNUSED(prects);
UNUSED(transparent);
}
/*
===============
D_EnableBackBufferAccess
===============
*/
void D_EnableBackBufferAccess (void)
{
VID_LockBuffer ();
}
/*
===============
D_TurnZOn
===============
*/
void D_TurnZOn (void)
{
// not needed for software version
}
/*
===============
D_DisableBackBufferAccess
===============
*/
void D_DisableBackBufferAccess (void)
{
VID_UnlockBuffer ();
}
/*
===============
D_SetupFrame
===============
*/
void D_SetupFrame (void)
{
int i;
if (r_dowarp)
d_viewbuffer = r_warpbuffer;
else
d_viewbuffer = (void *)(byte *)vid.buffer;
if (r_dowarp)
screenwidth = WARP_WIDTH;
else
screenwidth = vid.rowbytes;
d_roverwrapped = false;
d_initial_rover = sc_rover;
d_minmip = d_mipcap.value;
if (d_minmip > 3)
d_minmip = 3;
else if (d_minmip < 0)
d_minmip = 0;
for (i=0 ; i<(NUM_MIPS-1) ; i++)
d_scalemip[i] = basemip[i] * d_mipscale.value;
#if id386
if (d_subdiv16.value)
d_drawspans = D_DrawSpans16;
else
d_drawspans = D_DrawSpans8;
#else
d_drawspans = D_DrawSpans8;
#endif
d_aflatcolor = 0;
}
/*
===============
D_UpdateRects
===============
*/
void D_UpdateRects (vrect_t *prect)
{
// the software driver draws these directly to the vid buffer
UNUSED(prect);
}