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C/C++ Source or Header  |  1999-12-17  |  9.1 KB  |  271 lines
  1. /*  Emacs style mode select   -*- C++ -*-  */
  2. /* ----------------------------------------------------------------------------- */
  3. /*  */
  4. /*  $Id:$ */
  5. /*  */
  6. /*  Copyright (C) 1993-1996 by id Software, Inc. */
  7. /*  */
  8. /*  This source is available for distribution and/or modification */
  9. /*  only under the terms of the DOOM Source Code License as */
  10. /*  published by id Software. All rights reserved. */
  11. /*  */
  12. /*  The source is distributed in the hope that it will be useful, */
  13. /*  but WITHOUT ANY WARRANTY; without even the implied warranty of */
  14. /*  FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License */
  15. /*  for more details. */
  16. /*  */
  17. /*  $Log:$ */
  18. /*  */
  19. /*  DESCRIPTION: */
  20. /*     Gamma correction LUT stuff. */
  21. /*     Functions to draw patches (by post) directly to screen. */
  22. /*     Functions to blit a block to the screen. */
  23. /*  */
  24. /* ----------------------------------------------------------------------------- */
  25.  
  26.  
  27. static const char
  28. rcsid[] = "$Id: v_video.c,v 1.5 1997/02/03 22:45:13 b1 Exp $";
  29.  
  30. #include "i_system.h"
  31. #include "r_local.h"
  32.  
  33. #include "doomdef.h"
  34. #include "doomdata.h"
  35.  
  36. #include "m_bbox.h"
  37. #include "m_swap.h"
  38.  
  39. #include "v_video.h"
  40. #include "i_video.h"
  41.  
  42. #include "z_zone.h"
  43.  
  44. /*  Each screen is [SCREENWIDTH*SCREENHEIGHT];  */
  45. byte    *screens[5];    
  46.  
  47. /*  screens[0] = complete rendered screen + borders */
  48. /*  screens[1] = status bar + border */
  49. /*  screens[2] = start for wipe effect */
  50. /*  screens[3] = end for wipe effect */
  51. /*  screens[4] = status bar at bottom of screens[1]  */
  52. int                dirtybox[4]; 
  53.  
  54. /*  #define V_DrawPatchDirect V_DrawPatch */
  55.  
  56. /*  Now where did these came from? */
  57. byte gammatable[5][256] =
  58. {
  59.     {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,
  60.      17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,
  61.      33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,
  62.      49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,
  63.      65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,
  64.      81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,
  65.      97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,
  66.      113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,
  67.      128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,
  68.      144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,
  69.      160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,
  70.      176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,
  71.      192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,
  72.      208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,
  73.      224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,
  74.      240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255},
  75.  
  76.     {2,4,5,7,8,10,11,12,14,15,16,18,19,20,21,23,24,25,26,27,29,30,31,
  77.      32,33,34,36,37,38,39,40,41,42,44,45,46,47,48,49,50,51,52,54,55,
  78.      56,57,58,59,60,61,62,63,64,65,66,67,69,70,71,72,73,74,75,76,77,
  79.      78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,
  80.      99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,
  81.      115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,129,
  82.      130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,
  83.      146,147,148,148,149,150,151,152,153,154,155,156,157,158,159,160,
  84.      161,162,163,163,164,165,166,167,168,169,170,171,172,173,174,175,
  85.      175,176,177,178,179,180,181,182,183,184,185,186,186,187,188,189,
  86.      190,191,192,193,194,195,196,196,197,198,199,200,201,202,203,204,
  87.      205,205,206,207,208,209,210,211,212,213,214,214,215,216,217,218,
  88.      219,220,221,222,222,223,224,225,226,227,228,229,230,230,231,232,
  89.      233,234,235,236,237,237,238,239,240,241,242,243,244,245,245,246,
  90.      247,248,249,250,251,252,252,253,254,255},
  91.  
  92.     {4,7,9,11,13,15,17,19,21,22,24,26,27,29,30,32,33,35,36,38,39,40,42,
  93.      43,45,46,47,48,50,51,52,54,55,56,57,59,60,61,62,63,65,66,67,68,69,
  94.      70,72,73,74,75,76,77,78,79,80,82,83,84,85,86,87,88,89,90,91,92,93,
  95.      94,95,96,97,98,100,101,102,103,104,105,106,107,108,109,110,111,112,
  96.      113,114,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,
  97.      129,130,131,132,133,133,134,135,136,137,138,139,140,141,142,143,144,
  98.      144,145,146,147,148,149,150,151,152,153,153,154,155,156,157,158,159,
  99.      160,160,161,162,163,164,165,166,166,167,168,169,170,171,172,172,173,
  100.      174,175,176,177,178,178,179,180,181,182,183,183,184,185,186,187,188,
  101.      188,189,190,191,192,193,193,194,195,196,197,197,198,199,200,201,201,
  102.      202,203,204,205,206,206,207,208,209,210,210,211,212,213,213,214,215,
  103.      216,217,217,218,219,220,221,221,222,223,224,224,225,226,227,228,228,
  104.      229,230,231,231,232,233,234,235,235,236,237,238,238,239,240,241,241,
  105.      242,243,244,244,245,246,247,247,248,249,250,251,251,252,253,254,254,
  106.      255},
  107.  
  108.     {8,12,16,19,22,24,27,29,31,34,36,38,40,41,43,45,47,49,50,52,53,55,
  109.      57,58,60,61,63,64,65,67,68,70,71,72,74,75,76,77,79,80,81,82,84,85,
  110.      86,87,88,90,91,92,93,94,95,96,98,99,100,101,102,103,104,105,106,107,
  111.      108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,
  112.      125,126,127,128,129,130,131,132,133,134,135,135,136,137,138,139,140,
  113.      141,142,143,143,144,145,146,147,148,149,150,150,151,152,153,154,155,
  114.      155,156,157,158,159,160,160,161,162,163,164,165,165,166,167,168,169,
  115.      169,170,171,172,173,173,174,175,176,176,177,178,179,180,180,181,182,
  116.      183,183,184,185,186,186,187,188,189,189,190,191,192,192,193,194,195,
  117.      195,196,197,197,198,199,200,200,201,202,202,203,204,205,205,206,207,
  118.      207,208,209,210,210,211,212,212,213,214,214,215,216,216,217,218,219,
  119.      219,220,221,221,222,223,223,224,225,225,226,227,227,228,229,229,230,
  120.      231,231,232,233,233,234,235,235,236,237,237,238,238,239,240,240,241,
  121.      242,242,243,244,244,245,246,246,247,247,248,249,249,250,251,251,252,
  122.      253,253,254,254,255},
  123.  
  124.     {16,23,28,32,36,39,42,45,48,50,53,55,57,60,62,64,66,68,69,71,73,75,76,
  125.      78,80,81,83,84,86,87,89,90,92,93,94,96,97,98,100,101,102,103,105,106,
  126.      107,108,109,110,112,113,114,115,116,117,118,119,120,121,122,123,124,
  127.      125,126,128,128,129,130,131,132,133,134,135,136,137,138,139,140,141,
  128.      142,143,143,144,145,146,147,148,149,150,150,151,152,153,154,155,155,
  129.      156,157,158,159,159,160,161,162,163,163,164,165,166,166,167,168,169,
  130.      169,170,171,172,172,173,174,175,175,176,177,177,178,179,180,180,181,
  131.      182,182,183,184,184,185,186,187,187,188,189,189,190,191,191,192,193,
  132.      193,194,195,195,196,196,197,198,198,199,200,200,201,202,202,203,203,
  133.      204,205,205,206,207,207,208,208,209,210,210,211,211,212,213,213,214,
  134.      214,215,216,216,217,217,218,219,219,220,220,221,221,222,223,223,224,
  135.      224,225,225,226,227,227,228,228,229,229,230,230,231,232,232,233,233,
  136.      234,234,235,235,236,236,237,237,238,239,239,240,240,241,241,242,242,
  137.      243,243,244,244,245,245,246,246,247,247,248,248,249,249,250,250,251,
  138.      251,252,252,253,254,254,255,255}
  139. };
  140.  
  141.  
  142.  
  143. int    usegamma;
  144.              
  145. /*  */
  146. /*  V_MarkRect  */
  147. /*   */
  148. void
  149. V_MarkRect
  150. ( int        x,
  151.   int        y,
  152.   int        width,
  153.   int        height ) 
  154. { 
  155.     M_AddToBox (dirtybox, x, y); 
  156.     M_AddToBox (dirtybox, x+width-1, y+height-1); 
  157. } 
  158.  
  159.  
  160. /*  */
  161. /*  V_CopyRect  */
  162. /*   */
  163. void
  164. V_CopyRect
  165. ( int        srcx,
  166.   int        srcy,
  167.   int        srcscrn,
  168.   int        width,
  169.   int        height,
  170.   int        destx,
  171.   int        desty,
  172.   int        destscrn ) 
  173. { 
  174.     byte*    src;
  175.     byte*    dest; 
  176.      
  177. #ifdef RANGECHECK 
  178.     if (srcx<0
  179.     ||srcx+width >SCREENWIDTH
  180.     || srcy<0
  181.     || srcy+height>SCREENHEIGHT 
  182.     ||destx<0||destx+width >SCREENWIDTH
  183.     || desty<0
  184.     || desty+height>SCREENHEIGHT 
  185.     || (unsigned)srcscrn>4
  186.     || (unsigned)destscrn>4)
  187.     {
  188.     I_Error ("Bad V_CopyRect");
  189.     }
  190. #endif 
  191.     V_MarkRect (destx, desty, width, height); 
  192.      
  193.     src = screens[srcscrn]+(SCREENWIDTH*srcy+srcx)*pixel_size; 
  194.     dest = screens[destscrn]+(SCREENWIDTH*desty+destx)*pixel_size; 
  195.  
  196.     for ( ; height>0 ; height--) 
  197.     { 
  198.     memcpy (dest, src, width*pixel_size); 
  199.     src += SCREENWIDTH*pixel_size; 
  200.     dest += SCREENWIDTH*pixel_size; 
  201.     } 
  202. } 
  203.  
  204. /*  */
  205. /*  V_DrawBlock */
  206. /*  Draw a linear block of pixels into the view buffer. */
  207. /*  */
  208. void
  209. V_DrawBlock
  210. ( int        x,
  211.   int        y,
  212.   int        scrn,
  213.   int        width,
  214.   int        height,
  215.   byte*        src ) 
  216. { 
  217.     byte*    dest; 
  218.      
  219. #ifdef RANGECHECK 
  220.     if (x<0
  221.     ||x+width >SCREENWIDTH
  222.     || y<0
  223.     || y+height>SCREENHEIGHT 
  224.     || (unsigned)scrn>4 )
  225.     {
  226.     I_Error ("Bad V_DrawBlock");
  227.     }
  228. #endif 
  229.  
  230.     V_MarkRect (x, y, width, height); 
  231.  
  232.     dest = screens[scrn] + (y*SCREENWIDTH+x)*pixel_size; 
  233.  
  234.     while (height--) 
  235.     { 
  236.     memcpy (dest, src, width*pixel_size); 
  237.     src += width*pixel_size; 
  238.     dest += SCREENWIDTH*pixel_size; 
  239.     } 
  240. } 
  241.  
  242. /*  */
  243. /*  V_Init */
  244. /*   */
  245. void V_Init (void) 
  246. { 
  247.     int        i;
  248.     byte    *base;
  249.     unsigned long screen_size;
  250.  
  251.     screen_size=SCREENWIDTH*SCREENHEIGHT*pixel_size;
  252.         
  253.     /* Allocate the 4 screens */
  254.  
  255.     base = Z_Malloc (screen_size*4,PU_STATIC,0);
  256.  
  257.     if (!base)
  258.         I_Error("Not enough memory for screens\n");
  259.  
  260.     for (i=0 ; i<4 ; i++)
  261.     {
  262.         screens[i] = base + i*screen_size;
  263.         memset(screens[i],0,screen_size);
  264.     }
  265.  
  266.     /* and the status bar */
  267.     
  268.     screens[4]=screens[1]+(SCREENHEIGHT-SBARHEIGHT)*SCREENWIDTH*pixel_size;
  269. }
  270.  
  271.