fteqw/engine/sw/d_init.c

203 lines
3.9 KiB
C
Raw Normal View History

/*
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 = SCVAR("d_subdiv16", "1");
cvar_t d_mipcap = SCVAR("d_mipcap", "0");
cvar_t d_mipscale = SCVAR("d_mipscale", "0.5");
extern cvar_t d_smooth;
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);
void D_DrawSpans32 (espan_t *pspan);
void D_DrawSpans32From8 (espan_t *pspan);
void D_DrawSpans32_Smooth (espan_t *pspan);
void D_Shutdown (void)
{
D_ShutdownTrans();
}
/*
===============
D_Init
===============
*/
void D_Init (void)
{
r_skydirect = 1;
r_drawpolys = false;
r_worldpolysbacktofront = false;
r_recursiveaffinetriangles = true;
if (!r_pixbytes)
r_pixbytes = 1;
r_aliasuvscale = 1.0;
#ifdef PEXT_TRANS
D_InitTrans();
#endif
}
/*
===============
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)
{
extern qboolean r_usinglits;
int i;
if (r_dowarp)
d_viewbuffer = r_warpbuffer;
else
d_viewbuffer = (void *)(qbyte *)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 (r_pixbytes == 4)
d_drawspans = d_smooth.value?D_DrawSpans32_Smooth:D_DrawSpans32;
else if (r_pixbytes == 2)
d_drawspans = D_DrawSpans16;
else if (d_smooth.value)//override's subdiv16 (bigger impact)
d_drawspans = D_DrawSpans8_Smooth;
else if (d_subdiv16.value)
d_drawspans = D_DrawSpans8SubDiv16;
else
d_drawspans = D_DrawSpans8;
#else
if (r_pixbytes == 4)
{
if (r_usinglits)
d_drawspans = d_smooth.value?D_DrawSpans32_Smooth:D_DrawSpans32;
else
d_drawspans = D_DrawSpans32From8;
}
else if (r_pixbytes == 2)
d_drawspans = D_DrawSpans16;
else
d_drawspans = d_smooth.value?D_DrawSpans8_Smooth: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);
}