241 lines
4.9 KiB
C
241 lines
4.9 KiB
C
/*
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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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// d_init.c: rasterization driver initialization
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#include "quakedef.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 = {"d_subdiv16", "1"};
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cvar_t d_mipcap = {"d_mipcap", "0"};
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cvar_t d_mipscale = {"d_mipscale", "1"};
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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] = {(float)1.0, (float)(0.5*0.8), (float)(0.25*0.8)};
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#ifdef USEFPM
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surfcache_FPM_t *d_initial_roverFPM;
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fixedpoint_t d_scalemipFPM[NUM_MIPS-1];
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static fixedpoint_t basemipFPM[NUM_MIPS-1] = {FPM_FROMFLOATC(1.0), FPM_FROMFLOATC(0.5*0.8), FPM_FROMFLOATC(0.25*0.8)};
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#endif
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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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===============
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D_Init
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===============
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*/
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void D_Init (void)
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{
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r_skydirect = 1;
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Cvar_RegisterVariable (&d_subdiv16);
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Cvar_RegisterVariable (&d_mipcap);
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Cvar_RegisterVariable (&d_mipscale);
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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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#ifdef USEFPM
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void D_InitFPM (void)
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{
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r_skydirect = 1;
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#ifndef USEFLOAT
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Cvar_RegisterVariable (&d_subdiv16);
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Cvar_RegisterVariable (&d_mipcap);
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Cvar_RegisterVariable (&d_mipscale);
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#endif
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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_aliasuvscaleFPM = FPM_FROMFLOAT(1.0);
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}
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#endif
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/*
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===============
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D_CopyRects
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===============
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*/
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void 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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===============
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D_EnableBackBufferAccess
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===============
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*/
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void 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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===============
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D_TurnZOn
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===============
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*/
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void 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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===============
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D_DisableBackBufferAccess
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===============
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*/
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void 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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===============
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D_SetupFrame
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===============
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*/
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void 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 = (int)d_mipcap.value;
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if (d_minmip > 3)
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d_minmip = 3;
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else if (d_minmip < 0)
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d_minmip = 0;
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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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/*#if id386
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if (d_subdiv16.value)
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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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#ifdef USEFPM
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void D_SetupFrameFPM (void)
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{
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int i;
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fixedpoint_t d_mipscale_value=FPM_FROMFLOAT(d_mipscale.value);
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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_roverFPM = sc_roverFPM;
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d_minmip = (int)d_mipcap.value;
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if (d_minmip > 3)
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d_minmip = 3;
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else if (d_minmip < 0)
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d_minmip = 0;
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for (i=0 ; i<(NUM_MIPS-1) ; i++)
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d_scalemipFPM[i] = FPM_MUL(basemipFPM[i], d_mipscale_value);
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//Dan: id386 is not defined for Pocket PC builds
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#if id386
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if (d_subdiv16.value)
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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_DrawSpans8FPM; // FPM version doesn't seem to exist
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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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#endif
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/*
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===============
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D_UpdateRects
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===============
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*/
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void 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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