base/v_video.c

   1
   2 //**************************************************************************
   3 //**
   4 //** v_video.c : Heretic 2 : Raven Software, Corp.
   5 //**
   6 //** $RCSfile$
   7 //** $Revision$
   8 //** $Date$
   9 //** $Author$
  10 //**
  11 //**************************************************************************
  12
  13 #include "h2def.h"
  14
  15 #define SC_INDEX 0x3c4
  16
  17 byte *screen;
  18 int dirtybox[4];
  19 int usegamma;
  20
  21 byte gammatable[5][256] =
  22 {
  23 {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223,224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255},
  24
  25 {2,4,5,7,8,10,11,12,14,15,16,18,19,20,21,23,24,25,26,27,29,30,31,32,33,34,36,37,38,39,40,41,42,44,45,46,47,48,49,50,51,52,54,55,56,57,58,59,60,61,62,63,64,65,66,67,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,148,149,150,151,152,153,154,155,156,157,158,159,160,161,162,163,163,164,165,166,167,168,169,170,171,172,173,174,175,175,176,177,178,179,180,181,182,183,184,185,186,186,187,188,189,190,191,192,193,194,195,196,196,197,198,199,200,201,202,203,204,205,205,206,207,208,209,210,211,212,213,214,214,215,216,217,218,219,220,221,222,222,223,224,225,226,227,228,229,230,230,231,232,233,234,235,236,237,237,238,239,240,241,242,243,244,245,245,246,247,248,249,250,251,252,252,253,254,255},
  26
  27 {4,7,9,11,13,15,17,19,21,22,24,26,27,29,30,32,33,35,36,38,39,40,42,43,45,46,47,48,50,51,52,54,55,56,57,59,60,61,62,63,65,66,67,68,69,70,72,73,74,75,76,77,78,79,80,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,133,134,135,136,137,138,139,140,141,142,143,144,144,145,146,147,148,149,150,151,152,153,153,154,155,156,157,158,159,160,160,161,162,163,164,165,166,166,167,168,169,170,171,172,172,173,174,175,176,177,178,178,179,180,181,182,183,183,184,185,186,187,188,188,189,190,191,192,193,193,194,195,196,197,197,198,199,200,201,201,202,203,204,205,206,206,207,208,209,210,210,211,212,213,213,214,215,216,217,217,218,219,220,221,221,222,223,224,224,225,226,227,228,228,229,230,231,231,232,233,234,235,235,236,237,238,238,239,240,241,241,242,243,244,244,245,246,247,247,248,249,250,251,251,252,253,254,254,255},
  28
  29 {8,12,16,19,22,24,27,29,31,34,36,38,40,41,43,45,47,49,50,52,53,55,57,58,60,61,63,64,65,67,68,70,71,72,74,75,76,77,79,80,81,82,84,85,86,87,88,90,91,92,93,94,95,96,98,99,100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,135,136,137,138,139,140,141,142,143,143,144,145,146,147,148,149,150,150,151,152,153,154,155,155,156,157,158,159,160,160,161,162,163,164,165,165,166,167,168,169,169,170,171,172,173,173,174,175,176,176,177,178,179,180,180,181,182,183,183,184,185,186,186,187,188,189,189,190,191,192,192,193,194,195,195,196,197,197,198,199,200,200,201,202,202,203,204,205,205,206,207,207,208,209,210,210,211,212,212,213,214,214,215,216,216,217,218,219,219,220,221,221,222,223,223,224,225,225,226,227,227,228,229,229,230,231,231,232,233,233,234,235,235,236,237,237,238,238,239,240,240,241,242,242,243,244,244,245,246,246,247,247,248,249,249,250,251,251,252,253,253,254,254,255},
  30
  31 {16,23,28,32,36,39,42,45,48,50,53,55,57,60,62,64,66,68,69,71,73,75,76,78,80,81,83,84,86,87,89,90,92,93,94,96,97,98,100,101,102,103,105,106,107,108,109,110,112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,128,128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143,143,144,145,146,147,148,149,150,150,151,152,153,154,155,155,156,157,158,159,159,160,161,162,163,163,164,165,166,166,167,168,169,169,170,171,172,172,173,174,175,175,176,177,177,178,179,180,180,181,182,182,183,184,184,185,186,187,187,188,189,189,190,191,191,192,193,193,194,195,195,196,196,197,198,198,199,200,200,201,202,202,203,203,204,205,205,206,207,207,208,208,209,210,210,211,211,212,213,213,214,214,215,216,216,217,217,218,219,219,220,220,221,221,222,223,223,224,224,225,225,226,227,227,228,228,229,229,230,230,231,232,232,233,233,234,234,235,235,236,236,237,237,238,239,239,240,240,241,241,242,242,243,243,244,244,245,245,246,246,247,247,248,248,249,249,250,250,251,251,252,252,253,254,254,255,255}
  32 };
  33
  34 //---------------------------------------------------------------------------
  35 //
  36 // PROC V_DrawPatch
  37 //
  38 // Draws a column based masked pic to the screen.
  39 //
  40 //---------------------------------------------------------------------------
  41
  42 void V_DrawPatch(int x, int y, patch_t *patch)
  43 {
  44         int count;
  45         int col;
  46         column_t *column;
  47         byte *desttop;
  48         byte *dest;
  49         byte *source;
  50         int w;
  51
  52         y -= SHORT(patch->topoffset);
  53         x -= SHORT(patch->leftoffset);
  54         if(x < 0 || x+SHORT(patch->width) > SCREENWIDTH || y < 0
  55                 || y+SHORT(patch->height) > SCREENHEIGHT)
  56         {
  57                 I_Error("Bad V_DrawPatch");
  58         }
  59         col = 0;
  60         desttop = screen+y*SCREENWIDTH+x;
  61         w = SHORT(patch->width);
  62         for(; col < w; x++, col++, desttop++)
  63         {
  64                 column = (column_t *)((byte *)patch+LONG(patch->columnofs[col]));
  65                 // Step through the posts in a column
  66                 while(column->topdelta != 0xff)
  67                 {
  68                         source = (byte *)column+3;
  69                         dest = desttop+column->topdelta*SCREENWIDTH;
  70                         count = column->length;
  71                         while(count--)
  72                         {
  73                                 *dest = *source++;
  74                                 dest += SCREENWIDTH;
  75                         }
  76                         column = (column_t *)((byte *)column+column->length+4);
  77                 }
  78         }
  79 }
  80
  81 /*
  82 ==================
  83 =
  84 = V_DrawFuzzPatch
  85 =
  86 = Masks a column based translucent masked pic to the screen.
  87 =
  88 ==================
  89 */
  90 extern byte *tinttable;
  91
  92 void V_DrawFuzzPatch (int x, int y, patch_t *patch)
  93 {
  94         int                     count,col;
  95         column_t        *column;
  96         byte            *desttop, *dest, *source;
  97         int                     w;
  98
  99         y -= SHORT(patch->topoffset);
 100         x -= SHORT(patch->leftoffset);
 101
 102         if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
 103 )
 104                 I_Error ("Bad V_DrawPatch");
 105
 106         col = 0;
 107         desttop = screen+y*SCREENWIDTH+x;
 108
 109         w = SHORT(patch->width);
 110         for ( ; col<w ; x++, col++, desttop++)
 111         {
 112                 column = (column_t *)((byte *)patch + LONG(patch->columnofs[col]));
 113
 114 // step through the posts in a column
 115
 116                 while (column->topdelta != 0xff )
 117                 {
 118                         source = (byte *)column + 3;
 119                         dest = desttop + column->topdelta*SCREENWIDTH;
 120                         count = column->length;
 121
 122                         while (count--)
 123                         {
 124                                 *dest = tinttable[*dest + ((*source++)<<8)];
 125                                 dest += SCREENWIDTH;
 126                         }
 127                         column = (column_t *)((byte *)column+column->length+4);
 128                 }
 129         }
 130 }
 131
 132 /*
 133 ==================
 134 =
 135 = V_DrawAltFuzzPatch
 136 =
 137 = Masks a column based translucent masked pic to the screen.
 138 =
 139 ==================
 140 */
 141 extern byte *tinttable;
 142
 143 void V_DrawAltFuzzPatch (int x, int y, patch_t *patch)
 144 {
 145         int                     count,col;
 146         column_t        *column;
 147         byte            *desttop, *dest, *source;
 148         int                     w;
 149
 150         y -= SHORT(patch->topoffset);
 151         x -= SHORT(patch->leftoffset);
 152
 153         if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0
 154                 || y+SHORT(patch->height)>SCREENHEIGHT
 155 )
 156         {
 157                 I_Error ("Bad V_DrawPatch");
 158         }
 159
 160         col = 0;
 161         desttop = screen+y*SCREENWIDTH+x;
 162
 163         w = SHORT(patch->width);
 164         for ( ; col<w ; x++, col++, desttop++)
 165         {
 166                 column = (column_t *)((byte *)patch + LONG(patch->columnofs[col]));
 167
 168 // step through the posts in a column
 169
 170                 while (column->topdelta != 0xff )
 171                 {
 172                         source = (byte *)column + 3;
 173                         dest = desttop + column->topdelta*SCREENWIDTH;
 174                         count = column->length;
 175
 176                         while (count--)
 177                         {
 178                                 *dest = tinttable[((*dest)<<8) + *source++];
 179                                 dest += SCREENWIDTH;
 180                         }
 181                         column = (column_t *)((byte *)column+column->length+4);
 182                 }
 183         }
 184 }
 185
 186 /*
 187 ==================
 188 =
 189 = V_DrawShadowedPatch
 190 =
 191 = Masks a column based masked pic to the screen.
 192 =
 193 ==================
 194 */
 195
 196 void V_DrawShadowedPatch(int x, int y, patch_t *patch)
 197 {
 198         int                     count,col;
 199         column_t        *column;
 200         byte            *desttop, *dest, *source;
 201         byte            *desttop2, *dest2;
 202         int                     w;
 203
 204         y -= SHORT(patch->topoffset);
 205         x -= SHORT(patch->leftoffset);
 206
 207         if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
 208 )
 209                 I_Error ("Bad V_DrawPatch");
 210
 211         col = 0;
 212         desttop = screen+y*SCREENWIDTH+x;
 213         desttop2 = screen+(y+2)*SCREENWIDTH+x+2;
 214
 215         w = SHORT(patch->width);
 216         for ( ; col<w ; x++, col++, desttop++, desttop2++)
 217         {
 218                 column = (column_t *)((byte *)patch + LONG(patch->columnofs[col]));
 219
 220 // step through the posts in a column
 221
 222                 while (column->topdelta != 0xff )
 223                 {
 224                         source = (byte *)column + 3;
 225                         dest = desttop + column->topdelta*SCREENWIDTH;
 226                         dest2 = desttop2 + column->topdelta*SCREENWIDTH;
 227                         count = column->length;
 228
 229                         while (count--)
 230                         {
 231                                 *dest2 = tinttable[((*dest2)<<8)];
 232                                 dest2 += SCREENWIDTH;
 233                                 *dest = *source++;
 234                                 dest += SCREENWIDTH;
 235
 236                         }
 237                         column = (column_t *)(  (byte *)column + column->length
 238 + 4 );
 239                 }
 240         }
 241 }
 242
 243 //---------------------------------------------------------------------------
 244 //
 245 // PROC V_DrawRawScreen
 246 //
 247 //---------------------------------------------------------------------------
 248
 249 void V_DrawRawScreen(byte *raw)
 250 {
 251         memcpy(screen, raw, SCREENWIDTH*SCREENHEIGHT);
 252 }
 253
 254 //---------------------------------------------------------------------------
 255 //
 256 // PROC V_Init
 257 //
 258 //---------------------------------------------------------------------------
 259
 260 void V_Init(void)
 261 {
 262         // I_AllocLow will put screen in low dos memory on PCs.
 263         screen = I_AllocLow(SCREENWIDTH*SCREENHEIGHT);
 264 }
 265