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Diffstat (limited to 'demos/3rdparty/doom/r_draw.c')
| -rw-r--r-- | demos/3rdparty/doom/r_draw.c | 877 |
1 files changed, 0 insertions, 877 deletions
diff --git a/demos/3rdparty/doom/r_draw.c b/demos/3rdparty/doom/r_draw.c deleted file mode 100644 index 01450449..00000000 --- a/demos/3rdparty/doom/r_draw.c +++ /dev/null @@ -1,877 +0,0 @@ -// 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: -// The actual span/column drawing functions. -// Here find the main potential for optimization, -// e.g. inline assembly, different algorithms. -// -//----------------------------------------------------------------------------- - - -static const char -rcsid[] = "$Id: r_draw.c,v 1.4 1997/02/03 16:47:55 b1 Exp $"; - - -#include "doomdef.h" - -#include "i_system.h" -#include "z_zone.h" -#include "w_wad.h" - -#include "r_local.h" - -// Needs access to LFB (guess what). -#include "v_video.h" - -// State. -#include "doomstat.h" - - -// ? -#define MAXWIDTH 1120 -#define MAXHEIGHT 832 - -// status bar height at bottom of screen -#define SBARHEIGHT 32 - -// -// All drawing to the view buffer is accomplished in this file. -// The other refresh files only know about ccordinates, -// not the architecture of the frame buffer. -// Conveniently, the frame buffer is a linear one, -// and we need only the base address, -// and the total size == width*height*depth/8., -// - - -byte* viewimage; -int viewwidth; -int scaledviewwidth; -int viewheight; -int viewwindowx; -int viewwindowy; -byte* ylookup[MAXHEIGHT]; -int columnofs[MAXWIDTH]; - -// Color tables for different players, -// translate a limited part to another -// (color ramps used for suit colors). -// -byte translations[3][256]; - - - - -// -// R_DrawColumn -// Source is the top of the column to scale. -// -lighttable_t* dc_colormap; -int dc_x; -int dc_yl; -int dc_yh; -fixed_t dc_iscale; -fixed_t dc_texturemid; - -// first pixel in a column (possibly virtual) -byte* dc_source; - -// just for profiling -int dccount; - -// -// A column is a vertical slice/span from a wall texture that, -// given the DOOM style restrictions on the view orientation, -// will always have constant z depth. -// Thus a special case loop for very fast rendering can -// be used. It has also been used with Wolfenstein 3D. -// -void R_DrawColumn (void) -{ - int count; - byte* dest; - fixed_t frac; - fixed_t fracstep; - - count = dc_yh - dc_yl; - - // Zero length, column does not exceed a pixel. - if (count < 0) - return; - -#ifdef RANGECHECK - if ((unsigned)dc_x >= SCREENWIDTH - || dc_yl < 0 - || dc_yh >= SCREENHEIGHT) - I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x); -#endif - - // Framebuffer destination address. - // Use ylookup LUT to avoid multiply with ScreenWidth. - // Use columnofs LUT for subwindows? - dest = ylookup[dc_yl] + columnofs[dc_x]; - - // Determine scaling, - // which is the only mapping to be done. - fracstep = dc_iscale; - frac = dc_texturemid + (dc_yl-centery)*fracstep; - - // Inner loop that does the actual texture mapping, - // e.g. a DDA-lile scaling. - // This is as fast as it gets. - do - { - // Re-map color indices from wall texture column - // using a lighting/special effects LUT. - *dest = dc_colormap[dc_source[(frac>>FRACBITS)&127]]; - - dest += SCREENWIDTH; - frac += fracstep; - - } while (count--); -} - - - -// UNUSED. -// Loop unrolled. -#if 0 -void R_DrawColumn (void) -{ - int count; - byte* source; - byte* dest; - byte* colormap; - - unsigned frac; - unsigned fracstep; - unsigned fracstep2; - unsigned fracstep3; - unsigned fracstep4; - - count = dc_yh - dc_yl + 1; - - source = dc_source; - colormap = dc_colormap; - dest = ylookup[dc_yl] + columnofs[dc_x]; - - fracstep = dc_iscale<<9; - frac = (dc_texturemid + (dc_yl-centery)*dc_iscale)<<9; - - fracstep2 = fracstep+fracstep; - fracstep3 = fracstep2+fracstep; - fracstep4 = fracstep3+fracstep; - - while (count >= 8) - { - dest[0] = colormap[source[frac>>25]]; - dest[SCREENWIDTH] = colormap[source[(frac+fracstep)>>25]]; - dest[SCREENWIDTH*2] = colormap[source[(frac+fracstep2)>>25]]; - dest[SCREENWIDTH*3] = colormap[source[(frac+fracstep3)>>25]]; - - frac += fracstep4; - - dest[SCREENWIDTH*4] = colormap[source[frac>>25]]; - dest[SCREENWIDTH*5] = colormap[source[(frac+fracstep)>>25]]; - dest[SCREENWIDTH*6] = colormap[source[(frac+fracstep2)>>25]]; - dest[SCREENWIDTH*7] = colormap[source[(frac+fracstep3)>>25]]; - - frac += fracstep4; - dest += SCREENWIDTH*8; - count -= 8; - } - - while (count > 0) - { - *dest = colormap[source[frac>>25]]; - dest += SCREENWIDTH; - frac += fracstep; - count--; - } -} -#endif - - -void R_DrawColumnLow (void) -{ - int count; - byte* dest; - byte* dest2; - fixed_t frac; - fixed_t fracstep; - - count = dc_yh - dc_yl; - - // Zero length. - if (count < 0) - return; - -#ifdef RANGECHECK - if ((unsigned)dc_x >= SCREENWIDTH - || dc_yl < 0 - || dc_yh >= SCREENHEIGHT) - { - - I_Error ("R_DrawColumn: %i to %i at %i", dc_yl, dc_yh, dc_x); - } - // dccount++; -#endif - // Blocky mode, need to multiply by 2. - dc_x <<= 1; - - dest = ylookup[dc_yl] + columnofs[dc_x]; - dest2 = ylookup[dc_yl] + columnofs[dc_x+1]; - - fracstep = dc_iscale; - frac = dc_texturemid + (dc_yl-centery)*fracstep; - - do - { - // Hack. Does not work corretly. - *dest2 = *dest = dc_colormap[dc_source[(frac>>FRACBITS)&127]]; - dest += SCREENWIDTH; - dest2 += SCREENWIDTH; - frac += fracstep; - - } while (count--); -} - - -// -// Spectre/Invisibility. -// -#define FUZZTABLE 50 -#define FUZZOFF (SCREENWIDTH) - - -int fuzzoffset[FUZZTABLE] = -{ - FUZZOFF,-FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF, - FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF, - FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF, - FUZZOFF,-FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF, - FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,-FUZZOFF,FUZZOFF, - FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF, - FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF,FUZZOFF,-FUZZOFF,FUZZOFF -}; - -int fuzzpos = 0; - - -// -// Framebuffer postprocessing. -// Creates a fuzzy image by copying pixels -// from adjacent ones to left and right. -// Used with an all black colormap, this -// could create the SHADOW effect, -// i.e. spectres and invisible players. -// -void R_DrawFuzzColumn (void) -{ - int count; - byte* dest; - fixed_t frac; - fixed_t fracstep; - - // Adjust borders. Low... - if (!dc_yl) - dc_yl = 1; - - // .. and high. - if (dc_yh == viewheight-1) - dc_yh = viewheight - 2; - - count = dc_yh - dc_yl; - - // Zero length. - if (count < 0) - return; - - -#ifdef RANGECHECK - if ((unsigned)dc_x >= SCREENWIDTH - || dc_yl < 0 || dc_yh >= SCREENHEIGHT) - { - I_Error ("R_DrawFuzzColumn: %i to %i at %i", - dc_yl, dc_yh, dc_x); - } -#endif - - - // Keep till detailshift bug in blocky mode fixed, - // or blocky mode removed. - /* WATCOM code - if (detailshift) - { - if (dc_x & 1) - { - outpw (GC_INDEX,GC_READMAP+(2<<8) ); - outp (SC_INDEX+1,12); - } - else - { - outpw (GC_INDEX,GC_READMAP); - outp (SC_INDEX+1,3); - } - dest = destview + dc_yl*80 + (dc_x>>1); - } - else - { - outpw (GC_INDEX,GC_READMAP+((dc_x&3)<<8) ); - outp (SC_INDEX+1,1<<(dc_x&3)); - dest = destview + dc_yl*80 + (dc_x>>2); - }*/ - - - // Does not work with blocky mode. - dest = ylookup[dc_yl] + columnofs[dc_x]; - - // Looks familiar. - fracstep = dc_iscale; - frac = dc_texturemid + (dc_yl-centery)*fracstep; - - // Looks like an attempt at dithering, - // using the colormap #6 (of 0-31, a bit - // brighter than average). - do - { - // Lookup framebuffer, and retrieve - // a pixel that is either one column - // left or right of the current one. - // Add index from colormap to index. - *dest = colormaps[6*256+dest[fuzzoffset[fuzzpos]]]; - - // Clamp table lookup index. - if (++fuzzpos == FUZZTABLE) - fuzzpos = 0; - - dest += SCREENWIDTH; - - frac += fracstep; - } while (count--); -} - - - - -// -// R_DrawTranslatedColumn -// Used to draw player sprites -// with the green colorramp mapped to others. -// Could be used with different translation -// tables, e.g. the lighter colored version -// of the BaronOfHell, the HellKnight, uses -// identical sprites, kinda brightened up. -// -byte* dc_translation; -byte* translationtables; - -void R_DrawTranslatedColumn (void) -{ - int count; - byte* dest; - fixed_t frac; - fixed_t fracstep; - - count = dc_yh - dc_yl; - if (count < 0) - return; - -#ifdef RANGECHECK - if ((unsigned)dc_x >= SCREENWIDTH - || dc_yl < 0 - || dc_yh >= SCREENHEIGHT) - { - I_Error ( "R_DrawColumn: %i to %i at %i", - dc_yl, dc_yh, dc_x); - } - -#endif - - - // WATCOM VGA specific. - /* Keep for fixing. - if (detailshift) - { - if (dc_x & 1) - outp (SC_INDEX+1,12); - else - outp (SC_INDEX+1,3); - - dest = destview + dc_yl*80 + (dc_x>>1); - } - else - { - outp (SC_INDEX+1,1<<(dc_x&3)); - - dest = destview + dc_yl*80 + (dc_x>>2); - }*/ - - - // FIXME. As above. - dest = ylookup[dc_yl] + columnofs[dc_x]; - - // Looks familiar. - fracstep = dc_iscale; - frac = dc_texturemid + (dc_yl-centery)*fracstep; - - // Here we do an additional index re-mapping. - do - { - // Translation tables are used - // to map certain colorramps to other ones, - // used with PLAY sprites. - // Thus the "green" ramp of the player 0 sprite - // is mapped to gray, red, black/indigo. - *dest = dc_colormap[dc_translation[dc_source[frac>>FRACBITS]]]; - dest += SCREENWIDTH; - - frac += fracstep; - } while (count--); -} - - - - -// -// R_InitTranslationTables -// Creates the translation tables to map -// the green color ramp to gray, brown, red. -// Assumes a given structure of the PLAYPAL. -// Could be read from a lump instead. -// -void R_InitTranslationTables (void) -{ - int i; - - translationtables = Z_Malloc (256*3+255, PU_STATIC, 0); - translationtables = (byte *)(( (int)translationtables + 255 )& ~255); - - // translate just the 16 green colors - for (i=0 ; i<256 ; i++) - { - if (i >= 0x70 && i<= 0x7f) - { - // map green ramp to gray, brown, red - translationtables[i] = 0x60 + (i&0xf); - translationtables [i+256] = 0x40 + (i&0xf); - translationtables [i+512] = 0x20 + (i&0xf); - } - else - { - // Keep all other colors as is. - translationtables[i] = translationtables[i+256] - = translationtables[i+512] = i; - } - } -} - - - - -// -// R_DrawSpan -// With DOOM style restrictions on view orientation, -// the floors and ceilings consist of horizontal slices -// or spans with constant z depth. -// However, rotation around the world z axis is possible, -// thus this mapping, while simpler and faster than -// perspective correct texture mapping, has to traverse -// the texture at an angle in all but a few cases. -// In consequence, flats are not stored by column (like walls), -// and the inner loop has to step in texture space u and v. -// -int ds_y; -int ds_x1; -int ds_x2; - -lighttable_t* ds_colormap; - -fixed_t ds_xfrac; -fixed_t ds_yfrac; -fixed_t ds_xstep; -fixed_t ds_ystep; - -// start of a 64*64 tile image -byte* ds_source; - -// just for profiling -int dscount; - - -// -// Draws the actual span. -void R_DrawSpan (void) -{ - fixed_t xfrac; - fixed_t yfrac; - byte* dest; - int count; - int spot; - -#ifdef RANGECHECK - if (ds_x2 < ds_x1 - || ds_x1<0 - || ds_x2>=SCREENWIDTH - || (unsigned)ds_y>SCREENHEIGHT) - { - I_Error( "R_DrawSpan: %i to %i at %i", - ds_x1,ds_x2,ds_y); - } -// dscount++; -#endif - - - xfrac = ds_xfrac; - yfrac = ds_yfrac; - - dest = ylookup[ds_y] + columnofs[ds_x1]; - - // We do not check for zero spans here? - count = ds_x2 - ds_x1; - - do - { - // Current texture index in u,v. - spot = ((yfrac>>(16-6))&(63*64)) + ((xfrac>>16)&63); - - // Lookup pixel from flat texture tile, - // re-index using light/colormap. - *dest++ = ds_colormap[ds_source[spot]]; - - // Next step in u,v. - xfrac += ds_xstep; - yfrac += ds_ystep; - - } while (count--); -} - - - -// UNUSED. -// Loop unrolled by 4. -#if 0 -void R_DrawSpan (void) -{ - unsigned position, step; - - byte* source; - byte* colormap; - byte* dest; - - unsigned count; - usingned spot; - unsigned value; - unsigned temp; - unsigned xtemp; - unsigned ytemp; - - position = ((ds_xfrac<<10)&0xffff0000) | ((ds_yfrac>>6)&0xffff); - step = ((ds_xstep<<10)&0xffff0000) | ((ds_ystep>>6)&0xffff); - - source = ds_source; - colormap = ds_colormap; - dest = ylookup[ds_y] + columnofs[ds_x1]; - count = ds_x2 - ds_x1 + 1; - - while (count >= 4) - { - ytemp = position>>4; - ytemp = ytemp & 4032; - xtemp = position>>26; - spot = xtemp | ytemp; - position += step; - dest[0] = colormap[source[spot]]; - - ytemp = position>>4; - ytemp = ytemp & 4032; - xtemp = position>>26; - spot = xtemp | ytemp; - position += step; - dest[1] = colormap[source[spot]]; - - ytemp = position>>4; - ytemp = ytemp & 4032; - xtemp = position>>26; - spot = xtemp | ytemp; - position += step; - dest[2] = colormap[source[spot]]; - - ytemp = position>>4; - ytemp = ytemp & 4032; - xtemp = position>>26; - spot = xtemp | ytemp; - position += step; - dest[3] = colormap[source[spot]]; - - count -= 4; - dest += 4; - } - while (count > 0) - { - ytemp = position>>4; - ytemp = ytemp & 4032; - xtemp = position>>26; - spot = xtemp | ytemp; - position += step; - *dest++ = colormap[source[spot]]; - count--; - } -} -#endif - - -// -// Again.. -// -void R_DrawSpanLow (void) -{ - fixed_t xfrac; - fixed_t yfrac; - byte* dest; - int count; - int spot; - -#ifdef RANGECHECK - if (ds_x2 < ds_x1 - || ds_x1<0 - || ds_x2>=SCREENWIDTH - || (unsigned)ds_y>SCREENHEIGHT) - { - I_Error( "R_DrawSpan: %i to %i at %i", - ds_x1,ds_x2,ds_y); - } -// dscount++; -#endif - - xfrac = ds_xfrac; - yfrac = ds_yfrac; - - // Blocky mode, need to multiply by 2. - ds_x1 <<= 1; - ds_x2 <<= 1; - - dest = ylookup[ds_y] + columnofs[ds_x1]; - - - count = ds_x2 - ds_x1; - do - { - spot = ((yfrac>>(16-6))&(63*64)) + ((xfrac>>16)&63); - // Lowres/blocky mode does it twice, - // while scale is adjusted appropriately. - *dest++ = ds_colormap[ds_source[spot]]; - *dest++ = ds_colormap[ds_source[spot]]; - - xfrac += ds_xstep; - yfrac += ds_ystep; - - } while (count--); -} - -// -// R_InitBuffer -// Creats lookup tables that avoid -// multiplies and other hazzles -// for getting the framebuffer address -// of a pixel to draw. -// -void -R_InitBuffer -( int width, - int height ) -{ - int i; - - // Handle resize, - // e.g. smaller view windows - // with border and/or status bar. - viewwindowx = (SCREENWIDTH-width) >> 1; - - // Column offset. For windows. - for (i=0 ; i<width ; i++) - columnofs[i] = viewwindowx + i; - - // Samw with base row offset. - if (width == SCREENWIDTH) - viewwindowy = 0; - else - viewwindowy = (SCREENHEIGHT-SBARHEIGHT-height) >> 1; - - // Preclaculate all row offsets. - for (i=0 ; i<height ; i++) - ylookup[i] = screens[0] + (i+viewwindowy)*SCREENWIDTH; -} - - - - -// -// R_FillBackScreen -// Fills the back screen with a pattern -// for variable screen sizes -// Also draws a beveled edge. -// -void R_FillBackScreen (void) -{ - byte* src; - byte* dest; - int x; - int y; - patch_t* patch; - - // DOOM border patch. - char name1[] = "FLOOR7_2"; - - // DOOM II border patch. - char name2[] = "GRNROCK"; - - char* name; - - if (scaledviewwidth == 320) - return; - - if ( gamemode == commercial) - name = name2; - else - name = name1; - - src = W_CacheLumpName (name, PU_CACHE); - dest = screens[1]; - - for (y=0 ; y<SCREENHEIGHT-SBARHEIGHT ; y++) - { - for (x=0 ; x<SCREENWIDTH/64 ; x++) - { - memcpy (dest, src+((y&63)<<6), 64); - dest += 64; - } - - if (SCREENWIDTH&63) - { - memcpy (dest, src+((y&63)<<6), SCREENWIDTH&63); - dest += (SCREENWIDTH&63); - } - } - - patch = W_CacheLumpName ("brdr_t",PU_CACHE); - - for (x=0 ; x<scaledviewwidth ; x+=8) - V_DrawPatch (viewwindowx+x,viewwindowy-8,1,patch); - patch = W_CacheLumpName ("brdr_b",PU_CACHE); - - for (x=0 ; x<scaledviewwidth ; x+=8) - V_DrawPatch (viewwindowx+x,viewwindowy+viewheight,1,patch); - patch = W_CacheLumpName ("brdr_l",PU_CACHE); - - for (y=0 ; y<viewheight ; y+=8) - V_DrawPatch (viewwindowx-8,viewwindowy+y,1,patch); - patch = W_CacheLumpName ("brdr_r",PU_CACHE); - - for (y=0 ; y<viewheight ; y+=8) - V_DrawPatch (viewwindowx+scaledviewwidth,viewwindowy+y,1,patch); - - - // Draw beveled edge. - V_DrawPatch (viewwindowx-8, - viewwindowy-8, - 1, - W_CacheLumpName ("brdr_tl",PU_CACHE)); - - V_DrawPatch (viewwindowx+scaledviewwidth, - viewwindowy-8, - 1, - W_CacheLumpName ("brdr_tr",PU_CACHE)); - - V_DrawPatch (viewwindowx-8, - viewwindowy+viewheight, - 1, - W_CacheLumpName ("brdr_bl",PU_CACHE)); - - V_DrawPatch (viewwindowx+scaledviewwidth, - viewwindowy+viewheight, - 1, - W_CacheLumpName ("brdr_br",PU_CACHE)); -} - - -// -// Copy a screen buffer. -// -void -R_VideoErase -( unsigned ofs, - int count ) -{ - // LFB copy. - // This might not be a good idea if memcpy - // is not optiomal, e.g. byte by byte on - // a 32bit CPU, as GNU GCC/Linux libc did - // at one point. - memcpy (screens[0]+ofs, screens[1]+ofs, count); -} - - -// -// R_DrawViewBorder -// Draws the border around the view -// for different size windows? -// -void -V_MarkRect -( int x, - int y, - int width, - int height ); - -void R_DrawViewBorder (void) -{ - int top; - int side; - int ofs; - int i; - - if (scaledviewwidth == SCREENWIDTH) - return; - - top = ((SCREENHEIGHT-SBARHEIGHT)-viewheight)/2; - side = (SCREENWIDTH-scaledviewwidth)/2; - - // copy top and one line of left side - R_VideoErase (0, top*SCREENWIDTH+side); - - // copy one line of right side and bottom - ofs = (viewheight+top)*SCREENWIDTH-side; - R_VideoErase (ofs, top*SCREENWIDTH+side); - - // copy sides using wraparound - ofs = top*SCREENWIDTH + SCREENWIDTH-side; - side <<= 1; - - for (i=1 ; i<viewheight ; i++) - { - R_VideoErase (ofs, side); - ofs += SCREENWIDTH; - } - - // ? - V_MarkRect (0,0,SCREENWIDTH, SCREENHEIGHT-SBARHEIGHT); -} - - |