// 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 #include #include #include "i_system.h" #include "i_video.h" #include "r_local.h" #include "doomdef.h" #include "doomstat.h" #include "doomdata.h" #include "m_bbox.h" #include "m_swap.h" #include "m_argv.h" #include "am_map.h" #include "r_draw.h" #include "v_video.h" #include "st_stuff.h" // Screen buffer memory byte *vid_mem; // 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 src = screens[srcscrn]+SCREENWIDTH*srcy+srcx; dest = screens[destscrn]+SCREENWIDTH*desty+destx; for ( ; height>0 ; height--) { memcpy (dest, src, width); src += SCREENWIDTH; dest += SCREENWIDTH; } if (destscrn == 0) I_MarkRect (destx, desty, width, height); } // // 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; int x0; y -= SWAPSHORT(patch->topoffset); x -= SWAPSHORT(patch->leftoffset); #ifdef RANGECHECK if (x<0 ||x+SWAPSHORT(patch->width) >SCREENWIDTH || y<0 || y+SWAPSHORT(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 x0 = x; col = 0; desttop = screens[scrn]+y*SCREENWIDTH+x; w = SWAPSHORT(patch->width); for ( ; colcolumnofs[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 ); } } if (scrn == 0) I_MarkRect (x0, y, SWAPSHORT(patch->width), SWAPSHORT(patch->height)); } // // 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; int x0; y -= SWAPSHORT(patch->topoffset); x -= SWAPSHORT(patch->leftoffset); #ifdef RANGECHECK if (x<0 ||x+SWAPSHORT(patch->width) >SCREENWIDTH || y<0 || y+SWAPSHORT(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 x0 = x; col = 0; desttop = screens[scrn]+y*SCREENWIDTH+x; w = SWAPSHORT(patch->width); for ( ; colcolumnofs[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 ); } } if (scrn == 0) I_MarkRect (x0, y, SWAPSHORT(patch->width), SWAPSHORT(patch->height)); } // // 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); } void //stretches bitmap to fill screen V_DrawPatchInDirect ( int x, int y, int scrn, patch_t* patch ) { int count; int col; column_t* column; byte* desttop; byte* dest; byte* source; int w; int x0; int deltax,deltay,deltaxi,deltayi,stretchx,stretchy; int srccol,collen; y -= SWAPSHORT(patch->topoffset); x -= SWAPSHORT(patch->leftoffset); #ifdef RANGECHECK if (x<0 ||x+SWAPSHORT(patch->width)>320 || y<0 || y+SWAPSHORT(patch->height)>200 || (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 deltax=(SCREENWIDTH<<16)/320; deltaxi=(320<<16)/SCREENWIDTH; deltay=(SCREENHEIGHT<<16)/200; deltayi=(200<<16)/SCREENHEIGHT; stretchx=(x*deltax)>>16; stretchy=(y*deltay)>>16; x0 = x; col = 0; desttop = screens[scrn]+stretchy*SCREENWIDTH+stretchx; w = SWAPSHORT(patch->width)<<16; for ( ; col < w; x++, col += deltaxi, desttop++) { column = (column_t *)((byte *)patch + SWAPLONG(patch->columnofs[col>>16])); // step through the posts in a column while (column->topdelta != 0xff ) { source = (byte *)column + 3; dest = desttop+((column->topdelta*deltay)>>16)*SCREENWIDTH; collen = count = (column->length*deltay)>>16; srccol = 0; while (count--) { *dest = source[srccol>>16]; dest += SCREENWIDTH; srccol += deltayi; } column = (column_t *)((byte *)column + (column->length)+4); } } if (scrn == 0) I_MarkRect (x0, y, SWAPSHORT(patch->width), SWAPSHORT(patch->height)); } void //stretches bitmap to fill screen V_DrawPatchInDirectFlipped ( int x, int y, int scrn, patch_t* patch ) { int count; int col; column_t* column; byte* desttop; byte* dest; byte* source; int w; int deltax,deltay,deltaxi,deltayi,stretchx,stretchy; int srccol,collen; y -= SWAPSHORT(patch->topoffset); x -= SWAPSHORT(patch->leftoffset); #ifdef RANGECHECK if (x<0 ||x+SWAPSHORT(patch->width) >320 || y<0 || y+SWAPSHORT(patch->height)>200 || (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 deltax=(SCREENWIDTH<<16)/320; deltaxi=(320<<16)/SCREENWIDTH; deltay=(SCREENHEIGHT<<16)/200; deltayi=(200<<16)/SCREENHEIGHT; stretchx=(x*deltax)>>16; stretchy=(y*deltay)>>16; col = 0; desttop = screens[scrn]+stretchy*SCREENWIDTH+stretchx; w = SWAPSHORT(patch->width)<<16; for ( ; col < w; x++, col += deltaxi, desttop++) { column = (column_t *)((byte *)patch + SWAPLONG(patch->columnofs[SWAPSHORT(patch->width)-1-(col>>16)])); // step through the posts in a column while (column->topdelta != 0xff) { source = (byte *)column + 3; dest = desttop+((column->topdelta*deltay)>>16)*SCREENWIDTH; collen = count = (column->length*deltay)>>16; srccol=0; while (count--) { *dest=source[srccol>>16]; dest += SCREENWIDTH; srccol+=deltayi; } column = (column_t *)((byte *)column+(column->length)+4); } } if (scrn == 0) I_MarkRect (stretchx,stretchy,(SWAPSHORT(patch->width)*deltax)>>16, (SWAPSHORT(patch->height)*deltax)>>16); } // // 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; int height0; #ifdef RANGECHECK if (x<0 ||x+width >SCREENWIDTH || y<0 || y+height>SCREENHEIGHT || (unsigned)scrn>4 ) { I_Error ("Bad V_DrawBlock"); } #endif height0 = height; dest = screens[scrn] + y*SCREENWIDTH+x; while (height--) { memcpy (dest, src, width); src += width; dest += SCREENWIDTH; } if (scrn == 0) I_MarkRect (x, y, width, height0); } // // 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; } } #ifdef GRAFFITI extern int video_graffiti; #endif // // V_Init // void V_Init (void) { int i; int p; int vid_flags; int vid_size; #ifdef GRAFFITI video_graffiti = 0; if (M_CheckParm ("-graffitilo")) { video_graffiti = 1; SCREENWIDTH = 320; SCREENHEIGHT = 200; } else if (M_CheckParm ("-graffitihi")) { video_graffiti = 2; SCREENWIDTH = 640; SCREENHEIGHT = 400; } else { #endif p = M_CheckParm ("-width"); if (p && p < myargc-1) SCREENWIDTH = atoi(myargv[p+1]); else SCREENWIDTH = 320; p = M_CheckParm ("-height"); if (p && p < myargc-1) SCREENHEIGHT = atoi(myargv[p+1]); else SCREENHEIGHT = 200; #ifdef GRAFFITI } #endif printf ("Resolution: %d x %d\n", SCREENWIDTH, SCREENHEIGHT); if (SCREENWIDTH < 320 || SCREENWIDTH > MAXSCREENWIDTH || SCREENWIDTH % 32 != 0 || SCREENHEIGHT < 200 || SCREENHEIGHT > MAXSCREENHEIGHT) I_Error ("Resolution out of range or width is not a multiple of 32"); if ((SCREENHEIGHT*8) == (SCREENWIDTH*5)) // 640x400, 320x200 weirdaspect = 1; else if ((SCREENHEIGHT*4) == (SCREENWIDTH*3)) // 640x480, 320x240 weirdaspect = 0; else { weirdaspect = 0; printf("Warning: Bad aspect ratio, things might look screwy\n"); } //allocate all the res-dependant vars resinit_r_plane (); resinit_am_map (); resinit_r_draw (); xtoviewangle = (angle_t *)I_calloc (SCREENWIDTH+1, sizeof(angle_t)); negonearray = (short *)I_calloc (SCREENWIDTH, sizeof(short)); screenheightarray = (short *)I_calloc (SCREENWIDTH, sizeof(short)); // stick these in low dos memory on PCs vid_flags = MEMF_FAST+MEMF_PUBLIC; if (M_CheckParm ("-mmu")) vid_flags += MEMF_NOCACHESYNCPPC+MEMF_NOCACHESYNCM68K; vid_size = SCREENWIDTH*SCREENHEIGHT*4+SCREENWIDTH*ST_HEIGHT; vid_mem = PPCAllocVec (vid_size, vid_flags); if (vid_mem == NULL) I_Error ("Couldn't allocate memory for screens\n"); printf ("Screen memory located at $%08x\n", vid_mem); for (i=0 ; i<4 ; i++) screens[i] = vid_mem + i*SCREENWIDTH*SCREENHEIGHT; screens[4] = vid_mem + SCREENWIDTH*SCREENHEIGHT*4; }