v_video.c
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上传日期:2021-05-12
资源大小:455k
文件大小:14k
源码类别:
射击游戏
开发平台:
Visual C++
- // Emacs style mode select -*- C++ -*-
- //-----------------------------------------------------------------------------
- //
- // $Id:$
- //
- // 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.
- //
- // $Log:$
- //
- // 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,v 1.5 1997/02/03 22:45:13 b1 Exp $";
- #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"
- void WriteDebug(char *);
- char MsgText[256];
- // 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 LFBn", x,y );
- // No I_Error abort - what is up with TNT.WAD?
- fprintf( stderr, "V_DrawPatch: bad patch (ignored)n");
- return;
- }
- #endif
- if (!scrn)
- {
- //WriteDebug("V_MarkRect...n");
- V_MarkRect (x, y, SHORT(patch->width), SHORT(patch->height));
- }
- col = 0;
- desttop = screens[scrn]+y*SCREENWIDTH+x;
- w = SHORT(patch->width);
- //sprintf(MsgText, "width = %d, x/y = %d/%dn", w, x, y);
- //WriteDebug(MsgText);
- for ( ; col<w ; x++, col++, desttop++)
- {
- //sprintf(MsgText, "col = %d length = %dn", col, column->length);
- //WriteDebug(MsgText);
- 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;
- //sprintf(MsgText, "count = %dn", count);
- //WriteDebug(MsgText);
- while (count--)
- {
- *dest = *source++;
- dest += SCREENWIDTH;
- }
- column = (column_t *)((byte *)column + column->length + 4 );
- }
- }
- //WriteDebug("Finished V_DrawPatch...n");
- }
- //
- // 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 LFBn", 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, j, x;
- //byte* base;
- DWORD *buff;
- // stick these in low dos memory on PCs
- //base = I_AllocLow (SCREENWIDTH*SCREENHEIGHT*4);
- for (i = 0; i < 5; i++)
- {
- x = SCREENWIDTH * SCREENHEIGHT;
- screens[i] = (byte *)malloc(x);
- buff = (DWORD *)screens[i];
- x /= 4;
- for (j = 0; j < x; j++)
- buff[j] = 0x00000000;
- }
- // screens[i] = base + i*SCREENWIDTH*SCREENHEIGHT;
- }