201 lines
8.7 KiB
C++
201 lines
8.7 KiB
C++
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// V_video.c
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#include "DoomDef.h"
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#define SC_INDEX 0x3c4
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byte *screen;
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int dirtybox[4];
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int usegamma;
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byte gammatable[5][256] =
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{
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{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},
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{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},
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{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},
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{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},
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{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}
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};
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//---------------------------------------------------------------------------
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//
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// PROC V_DrawPatch
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//
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// Draws a column based masked pic to the screen.
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//
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//---------------------------------------------------------------------------
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void V_DrawPatch(int x, int y, patch_t *patch)
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{
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int count;
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int col;
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column_t *column;
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byte *desttop;
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byte *dest;
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byte *source;
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int w;
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y -= SHORT(patch->topoffset);
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x -= SHORT(patch->leftoffset);
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if(x < 0 || x+SHORT(patch->width) > SCREENWIDTH || y < 0
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|| y+SHORT(patch->height) > SCREENHEIGHT)
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{
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I_Error("Bad V_DrawPatch");
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}
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col = 0;
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desttop = screen+y*SCREENWIDTH+x;
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w = SHORT(patch->width);
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for(; col < w; x++, col++, desttop++)
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{
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column = (column_t *)((byte *)patch+LONG(patch->columnofs[col]));
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// Step through the posts in a column
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while(column->topdelta != 0xff)
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{
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source = (byte *)column+3;
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dest = desttop+column->topdelta*SCREENWIDTH;
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count = column->length;
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while(count--)
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{
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*dest = *source++;
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dest += SCREENWIDTH;
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}
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column = (column_t *)((byte *)column+column->length+4);
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}
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}
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}
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/*
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==================
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=
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= V_DrawFuzzPatch
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=
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= Masks a column based translucent masked pic to the screen.
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=
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==================
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*/
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extern byte *tinttable;
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void V_DrawFuzzPatch (int x, int y, patch_t *patch)
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{
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int count,col;
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column_t *column;
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byte *desttop, *dest, *source;
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int w;
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y -= SHORT(patch->topoffset);
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x -= SHORT(patch->leftoffset);
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if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
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I_Error ("Bad V_DrawPatch");
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col = 0;
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desttop = screen+y*SCREENWIDTH+x;
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w = SHORT(patch->width);
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for ( ; col<w ; x++, col++, desttop++)
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{
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column = (column_t *)((byte *)patch + LONG(patch->columnofs[col]));
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// step through the posts in a column
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while (column->topdelta != 0xff )
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{
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source = (byte *)column + 3;
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dest = desttop + column->topdelta*SCREENWIDTH;
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count = column->length;
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while (count--)
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{
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*dest = tinttable[((*dest)<<8) + *source++];
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dest += SCREENWIDTH;
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}
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column = (column_t *)( (byte *)column + column->length
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+ 4 );
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}
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}
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}
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/*
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==================
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=
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= V_DrawShadowedPatch
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=
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= Masks a column based masked pic to the screen.
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=
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==================
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*/
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void V_DrawShadowedPatch(int x, int y, patch_t *patch)
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{
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int count,col;
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column_t *column;
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byte *desttop, *dest, *source;
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byte *desttop2, *dest2;
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int w;
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y -= SHORT(patch->topoffset);
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x -= SHORT(patch->leftoffset);
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if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
)
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I_Error ("Bad V_DrawPatch");
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col = 0;
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desttop = screen+y*SCREENWIDTH+x;
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desttop2 = screen+(y+2)*SCREENWIDTH+x+2;
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w = SHORT(patch->width);
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for ( ; col<w ; x++, col++, desttop++, desttop2++)
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{
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column = (column_t *)((byte *)patch + LONG(patch->columnofs[col]));
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// step through the posts in a column
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while (column->topdelta != 0xff )
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{
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source = (byte *)column + 3;
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dest = desttop + column->topdelta*SCREENWIDTH;
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dest2 = desttop2 + column->topdelta*SCREENWIDTH;
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count = column->length;
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while (count--)
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{
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*dest2 = tinttable[((*dest2)<<8)];
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dest2 += SCREENWIDTH;
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*dest = *source++;
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dest += SCREENWIDTH;
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}
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column = (column_t *)( (byte *)column + column->length
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+ 4 );
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}
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}
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}
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//---------------------------------------------------------------------------
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//
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// PROC V_DrawRawScreen
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//
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//---------------------------------------------------------------------------
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void V_DrawRawScreen(byte *raw)
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{
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memcpy(screen, raw, SCREENWIDTH*SCREENHEIGHT);
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}
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//---------------------------------------------------------------------------
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//
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// PROC V_Init
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//
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//---------------------------------------------------------------------------
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void V_Init(void)
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{
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// I_AllocLow will put screen in low dos memory on PCs.
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screen = I_AllocLow(SCREENWIDTH*SCREENHEIGHT);
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}
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