justin
1 line
11 KiB
C++
1 line
11 KiB
C++
// V_video.c
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#include "doomdef.h"
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#define SC_INDEX 0x3c4
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byte *screens[5]; // [SCREENWIDTH*SCREENHEIGHT];
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int dirtybox[4];
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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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int usegamma;
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/*
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==================
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=
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= V_MarkRect
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=
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==================
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*/
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void V_MarkRect (int x, int y, int width, int height)
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{
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M_AddToBox (dirtybox, x, y);
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M_AddToBox (dirtybox, x+width-1, y+height-1);
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}
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/*
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==================
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=
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= V_CopyRect
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=
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==================
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*/
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void V_CopyRect (int srcx, int srcy, int srcscrn, int width, int height,
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int destx, int desty, int destscrn)
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{
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byte *src, *dest;
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#ifdef RANGECHECK
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if (srcx<0||srcx+width >SCREENWIDTH || srcy<0 || srcy+height>SCREENHEIGHT
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||destx<0||destx+width >SCREENWIDTH || desty<0 || desty+height>SCREENHEIGHT
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|| (unsigned)srcscrn>4 || (unsigned)destscrn>4)
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I_Error ("Bad V_CopyRect");
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#endif
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V_MarkRect (destx, desty, width, height);
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src = screens[srcscrn]+SCREENWIDTH*srcy+srcx;
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dest = screens[destscrn]+SCREENWIDTH*desty+destx;
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for ( ; height>0 ; height--)
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{
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memcpy (dest, src, width);
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src += SCREENWIDTH;
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dest += SCREENWIDTH;
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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_DrawPatch
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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_DrawPatch (int x, int y, int scrn, 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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#ifdef RANGECHECK
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if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
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|| (unsigned)scrn>4)
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I_Error ("Bad V_DrawPatch");
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#endif
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if (!scrn)
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V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height));
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col = 0;
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desttop = screens[scrn]+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
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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_DrawPatchFlipped
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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_DrawPatchFlipped (int x, int y, int scrn, 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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#ifdef RANGECHECK
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if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
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|| (unsigned)scrn>4)
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I_Error ("Bad V_DrawPatch");
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#endif
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if (!scrn)
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V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height));
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col = 0;
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desttop = screens[scrn]+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[w-1-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
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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_DrawPatchDirect
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=
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= Draws directly to the screen on the pc
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==================
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*/
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void V_DrawPatchDirect (int x, int y, int scrn, patch_t *patch)
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{
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#ifndef __WATCOMC__
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V_DrawPatch (x,y,scrn, patch);
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#else
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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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#ifdef RANGECHECK
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if (x<0||x+SHORT(patch->width) >SCREENWIDTH || y<0 || y+SHORT(patch->height)>SCREENHEIGHT
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|| (unsigned)scrn>4)
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I_Error ("Bad V_DrawPatchDirect");
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#endif
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// V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height));
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desttop = destscreen + y*SCREENWIDTH/4 + (x>>2);
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w = SHORT(patch->width);
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for ( col = 0 ; col<w ; col++)
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{
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outp (SC_INDEX+1,1<<(x&3));
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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/4;
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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/4;
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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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if ( ((++x)&3) == 0 )
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desttop++; // go to next byte, not next plane
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}
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#endif
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}
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/*
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===============
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=
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= V_DrawBlock
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=
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= draw a linear block of pixels into the view buffer
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===============
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*/
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void V_DrawBlock (int x, int y, int scrn, int width, int height, byte *src)
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{
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byte *dest;
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#ifdef RANGECHECK
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if (x<0||x+width >SCREENWIDTH || y<0 || y+height>SCREENHEIGHT
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|| (unsigned)scrn>4 )
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I_Error ("Bad V_DrawBlock");
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#endif
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V_MarkRect (x, y, width, height);
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dest = screens[scrn] + y*SCREENWIDTH+x;
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while (height--)
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{
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memcpy (dest, src, width);
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src += width;
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dest += SCREENWIDTH;
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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_GetBlock
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=
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= gets a linear block of pixels from the view buffer
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===============
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*/
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void V_GetBlock (int x, int y, int scrn, int width, int height, byte *dest)
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{
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byte *src;
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#ifdef RANGECHECK
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if (x<0||x+width >SCREENWIDTH || y<0 || y+height>SCREENHEIGHT
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|| (unsigned)scrn>4 )
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I_Error ("Bad V_DrawBlock");
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#endif
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src = screens[scrn] + y*SCREENWIDTH+x;
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while (height--)
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{
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memcpy (dest, src, width);
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src += SCREENWIDTH;
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dest += width;
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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_Init
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=
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===============
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*/
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void V_Init (void)
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{
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int i;
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byte *base;
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// stick these in low dos memory on PCs
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base = I_AllocLow (SCREENWIDTH*SCREENHEIGHT*4);
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for (i=0 ; i<4 ; i++)
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screens[i] = base + i*SCREENWIDTH*SCREENHEIGHT;
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}
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