quakeforge/libs/video/renderer/sw/d_modech.c

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/*
d_modech.c
called when mode has just changed
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
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static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
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#include "QF/render.h"
#include "QF/sys.h"
#include "d_local.h"
int d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;
int d_y_aspect_shift, d_pix_min, d_pix_max, d_pix_shift;
int d_scantable[MAXHEIGHT];
short *zspantable[MAXHEIGHT];
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void
D_Patch (void)
{
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#ifdef PIC
#undef USE_INTEL_ASM //XXX asm pic hack
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#endif
#ifdef USE_INTEL_ASM
static qboolean protectset8 = false;
if (!protectset8) {
Sys_MakeCodeWriteable ((int) D_PolysetAff8Start,
(int) D_PolysetAff8End -
(int) D_PolysetAff8Start);
protectset8 = true;
}
#endif // USE_INTEL_ASM
}
void
D_ViewChanged (void)
{
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int rowpixels;
if (r_dowarp)
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rowpixels = WARP_WIDTH;
else
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rowpixels = vid.rowbytes / r_pixbytes;
scale_for_mip = xscale;
if (yscale > xscale)
scale_for_mip = yscale;
d_zrowbytes = vid.width * 2;
d_zwidth = vid.width;
d_pix_min = r_refdef.vrect.width / 320;
if (d_pix_min < 1)
d_pix_min = 1;
d_pix_max = (int) ((float) r_refdef.vrect.width / (320.0 / 4.0) + 0.5);
d_pix_shift = 8 - (int) ((float) r_refdef.vrect.width / 320.0 + 0.5);
if (d_pix_max < 1)
d_pix_max = 1;
if (pixelAspect > 1.4)
d_y_aspect_shift = 1;
else
d_y_aspect_shift = 0;
d_vrectx = r_refdef.vrect.x;
d_vrecty = r_refdef.vrect.y;
d_vrectright_particle = r_refdef.vrectright - d_pix_max;
d_vrectbottom_particle =
r_refdef.vrectbottom - (d_pix_max << d_y_aspect_shift);
{
int i;
for (i = 0; i < vid.height; i++) {
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d_scantable[i] = i * rowpixels;
zspantable[i] = d_pzbuffer + i * d_zwidth;
}
}
D_Patch ();
}