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Diffstat (limited to 'src/v_video.c')
| -rw-r--r-- | src/v_video.c | 496 |
1 files changed, 496 insertions, 0 deletions
diff --git a/src/v_video.c b/src/v_video.c new file mode 100644 index 00000000..26ff9e39 --- /dev/null +++ b/src/v_video.c @@ -0,0 +1,496 @@ +// Emacs style mode select -*- C++ -*- +//----------------------------------------------------------------------------- +// +// $Id: v_video.c 4 2005-07-23 16:19:41Z fraggle $ +// +// Copyright (C) 1993-1996 by id Software, Inc. +// +// This source is available for distribution and/or modification +// only under the terms of the DOOM Source Code License as +// published by id Software. All rights reserved. +// +// The source is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License +// for more details. +// +// $Log$ +// Revision 1.1 2005/07/23 16:20:30 fraggle +// Initial revision +// +// +// DESCRIPTION: +// Gamma correction LUT stuff. +// Functions to draw patches (by post) directly to screen. +// Functions to blit a block to the screen. +// +//----------------------------------------------------------------------------- + + +static const char +rcsid[] = "$Id: v_video.c 4 2005-07-23 16:19:41Z fraggle $"; + + +#include "i_system.h" +#include "r_local.h" + +#include "doomdef.h" +#include "doomdata.h" + +#include "m_bbox.h" +#include "m_swap.h" + +#include "v_video.h" + + +// Each screen is [SCREENWIDTH*SCREENHEIGHT]; +byte* screens[5]; + +int dirtybox[4]; + + + +// Now where did these came from? +byte gammatable[5][256] = +{ + {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}, + + {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}, + + {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}, + + {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}, + + {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} +}; + + + +int usegamma; + +// +// V_MarkRect +// +void +V_MarkRect +( int x, + int y, + int width, + int height ) +{ + M_AddToBox (dirtybox, x, y); + M_AddToBox (dirtybox, x+width-1, y+height-1); +} + + +// +// V_CopyRect +// +void +V_CopyRect +( int srcx, + int srcy, + int srcscrn, + int width, + int height, + int destx, + int desty, + int destscrn ) +{ + byte* src; + byte* dest; + +#ifdef RANGECHECK + if (srcx<0 + ||srcx+width >SCREENWIDTH + || srcy<0 + || srcy+height>SCREENHEIGHT + ||destx<0||destx+width >SCREENWIDTH + || desty<0 + || desty+height>SCREENHEIGHT + || (unsigned)srcscrn>4 + || (unsigned)destscrn>4) + { + I_Error ("Bad V_CopyRect"); + } +#endif + V_MarkRect (destx, desty, width, height); + + src = screens[srcscrn]+SCREENWIDTH*srcy+srcx; + dest = screens[destscrn]+SCREENWIDTH*desty+destx; + + for ( ; height>0 ; height--) + { + memcpy (dest, src, width); + src += SCREENWIDTH; + dest += SCREENWIDTH; + } +} + + +// +// V_DrawPatch +// Masks a column based masked pic to the screen. +// +void +V_DrawPatch +( int x, + int y, + int scrn, + patch_t* patch ) +{ + + int count; + int col; + column_t* column; + byte* desttop; + byte* dest; + byte* source; + int w; + + y -= SHORT(patch->topoffset); + x -= SHORT(patch->leftoffset); +#ifdef RANGECHECK + if (x<0 + ||x+SHORT(patch->width) >SCREENWIDTH + || y<0 + || y+SHORT(patch->height)>SCREENHEIGHT + || (unsigned)scrn>4) + { + fprintf( stderr, "Patch at %d,%d exceeds LFB\n", x,y ); + // No I_Error abort - what is up with TNT.WAD? + fprintf( stderr, "V_DrawPatch: bad patch (ignored)\n"); + return; + } +#endif + + if (!scrn) + V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height)); + + col = 0; + desttop = screens[scrn]+y*SCREENWIDTH+x; + + w = SHORT(patch->width); + + for ( ; col<w ; x++, col++, desttop++) + { + column = (column_t *)((byte *)patch + LONG(patch->columnofs[col])); + + // step through the posts in a column + while (column->topdelta != 0xff ) + { + source = (byte *)column + 3; + dest = desttop + column->topdelta*SCREENWIDTH; + count = column->length; + + while (count--) + { + *dest = *source++; + dest += SCREENWIDTH; + } + column = (column_t *)( (byte *)column + column->length + + 4 ); + } + } +} + +// +// V_DrawPatchFlipped +// Masks a column based masked pic to the screen. +// Flips horizontally, e.g. to mirror face. +// +void +V_DrawPatchFlipped +( int x, + int y, + int scrn, + patch_t* patch ) +{ + + int count; + int col; + column_t* column; + byte* desttop; + byte* dest; + byte* source; + int w; + + y -= SHORT(patch->topoffset); + x -= SHORT(patch->leftoffset); +#ifdef RANGECHECK + if (x<0 + ||x+SHORT(patch->width) >SCREENWIDTH + || y<0 + || y+SHORT(patch->height)>SCREENHEIGHT + || (unsigned)scrn>4) + { + fprintf( stderr, "Patch origin %d,%d exceeds LFB\n", x,y ); + I_Error ("Bad V_DrawPatch in V_DrawPatchFlipped"); + } +#endif + + if (!scrn) + V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height)); + + col = 0; + desttop = screens[scrn]+y*SCREENWIDTH+x; + + w = SHORT(patch->width); + + for ( ; col<w ; x++, col++, desttop++) + { + column = (column_t *)((byte *)patch + LONG(patch->columnofs[w-1-col])); + + // step through the posts in a column + while (column->topdelta != 0xff ) + { + source = (byte *)column + 3; + dest = desttop + column->topdelta*SCREENWIDTH; + count = column->length; + + while (count--) + { + *dest = *source++; + dest += SCREENWIDTH; + } + column = (column_t *)( (byte *)column + column->length + + 4 ); + } + } +} + + + +// +// V_DrawPatchDirect +// Draws directly to the screen on the pc. +// +void +V_DrawPatchDirect +( int x, + int y, + int scrn, + patch_t* patch ) +{ + V_DrawPatch (x,y,scrn, patch); + + /* + int count; + int col; + column_t* column; + byte* desttop; + byte* dest; + byte* source; + int w; + + y -= SHORT(patch->topoffset); + x -= SHORT(patch->leftoffset); + +#ifdef RANGECHECK + if (x<0 + ||x+SHORT(patch->width) >SCREENWIDTH + || y<0 + || y+SHORT(patch->height)>SCREENHEIGHT + || (unsigned)scrn>4) + { + I_Error ("Bad V_DrawPatchDirect"); + } +#endif + + // V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height)); + desttop = destscreen + y*SCREENWIDTH/4 + (x>>2); + + w = SHORT(patch->width); + for ( col = 0 ; col<w ; col++) + { + outp (SC_INDEX+1,1<<(x&3)); + column = (column_t *)((byte *)patch + LONG(patch->columnofs[col])); + + // step through the posts in a column + + while (column->topdelta != 0xff ) + { + source = (byte *)column + 3; + dest = desttop + column->topdelta*SCREENWIDTH/4; + count = column->length; + + while (count--) + { + *dest = *source++; + dest += SCREENWIDTH/4; + } + column = (column_t *)( (byte *)column + column->length + + 4 ); + } + if ( ((++x)&3) == 0 ) + desttop++; // go to next byte, not next plane + }*/ +} + + + +// +// V_DrawBlock +// Draw a linear block of pixels into the view buffer. +// +void +V_DrawBlock +( int x, + int y, + int scrn, + int width, + int height, + byte* src ) +{ + byte* dest; + +#ifdef RANGECHECK + if (x<0 + ||x+width >SCREENWIDTH + || y<0 + || y+height>SCREENHEIGHT + || (unsigned)scrn>4 ) + { + I_Error ("Bad V_DrawBlock"); + } +#endif + + V_MarkRect (x, y, width, height); + + dest = screens[scrn] + y*SCREENWIDTH+x; + + while (height--) + { + memcpy (dest, src, width); + src += width; + dest += SCREENWIDTH; + } +} + + + +// +// V_GetBlock +// Gets a linear block of pixels from the view buffer. +// +void +V_GetBlock +( int x, + int y, + int scrn, + int width, + int height, + byte* dest ) +{ + byte* src; + +#ifdef RANGECHECK + if (x<0 + ||x+width >SCREENWIDTH + || y<0 + || y+height>SCREENHEIGHT + || (unsigned)scrn>4 ) + { + I_Error ("Bad V_DrawBlock"); + } +#endif + + src = screens[scrn] + y*SCREENWIDTH+x; + + while (height--) + { + memcpy (dest, src, width); + src += SCREENWIDTH; + dest += width; + } +} + + + + +// +// V_Init +// +void V_Init (void) +{ + int i; + byte* base; + + // stick these in low dos memory on PCs + + base = I_AllocLow (SCREENWIDTH*SCREENHEIGHT*4); + + for (i=0 ; i<4 ; i++) + screens[i] = base + i*SCREENWIDTH*SCREENHEIGHT; +} |