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  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.  
  108.