d_modech.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3
   4 This program is free software; you can redistribute it and/or
   5 modify it under the terms of the GNU General Public License
   6 as published by the Free Software Foundation; either version 2
   7 of the License, or (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  12
  13 See the GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  18
  19 */
  20 // d_modech.c: called when mode has just changed
  21
  22 #include "quakedef.h"
  23 #include "d_local.h"
  24
  25 int     d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle;
  26
  27 int     d_y_aspect_shift, d_pix_min, d_pix_max, d_pix_shift;
  28
  29 int             d_scantable[MAXHEIGHT];
  30 short   *zspantable[MAXHEIGHT];
  31
  32 /*
  33 ================
  34 D_Patch
  35 ================
  36 */
  37 void D_Patch (void)
  38 {
  39 #if id386
  40
  41         static qboolean protectset8 = false;
  42
  43         if (!protectset8)
  44         {
  45                 Sys_MakeCodeWriteable ((int)D_PolysetAff8Start,
  46                                                      (int)D_PolysetAff8End - (int)D_PolysetAff8Start);
  47                 protectset8 = true;
  48         }
  49
  50 #endif  // id386
  51 }
  52
  53
  54 /*
  55 ================
  56 D_ViewChanged
  57 ================
  58 */
  59 void D_ViewChanged (void)
  60 {
  61         int rowbytes;
  62
  63         if (r_dowarp)
  64                 rowbytes = WARP_WIDTH;
  65         else
  66                 rowbytes = vid.rowbytes;
  67
  68         scale_for_mip = xscale;
  69         if (yscale > xscale)
  70                 scale_for_mip = yscale;
  71
  72         d_zrowbytes = vid.width * 2;
  73         d_zwidth = vid.width;
  74
  75         d_pix_min = r_refdef.vrect.width / 320;
  76         if (d_pix_min < 1)
  77                 d_pix_min = 1;
  78
  79         d_pix_max = (int)((float)r_refdef.vrect.width / (320.0 / 4.0) + 0.5);
  80         d_pix_shift = 8 - (int)((float)r_refdef.vrect.width / 320.0 + 0.5);
  81         if (d_pix_max < 1)
  82                 d_pix_max = 1;
  83
  84         if (pixelAspect > 1.4)
  85                 d_y_aspect_shift = 1;
  86         else
  87                 d_y_aspect_shift = 0;
  88
  89         d_vrectx = r_refdef.vrect.x;
  90         d_vrecty = r_refdef.vrect.y;
  91         d_vrectright_particle = r_refdef.vrectright - d_pix_max;
  92         d_vrectbottom_particle =
  93                         r_refdef.vrectbottom - (d_pix_max << d_y_aspect_shift);
  94
  95         {
  96                 int             i;
  97
  98                 for (i=0 ; i<vid.height; i++)
  99                 {
 100                         d_scantable[i] = i*rowbytes;
 101                         zspantable[i] = d_pzbuffer + i*d_zwidth;
 102                 }
 103         }
 104
 105         D_Patch ();
 106 }
 107