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doom-ios/code/prboom/r_drawcolumn.inl

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/* Emacs style mode select -*- C++ -*-
*-----------------------------------------------------------------------------
*
*
* PrBoom: a Doom port merged with LxDoom and LSDLDoom
* based on BOOM, a modified and improved DOOM engine
* Copyright (C) 1999 by
* id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman
* Copyright (C) 1999-2000 by
* Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze
* Copyright 2005, 2006 by
* Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
*-----------------------------------------------------------------------------*/
#if (R_DRAWCOLUMN_PIPELINE_BITS == 8)
#define SCREENTYPE byte
#define TEMPBUF byte_tempbuf
#elif (R_DRAWCOLUMN_PIPELINE_BITS == 15)
#define SCREENTYPE unsigned short
#define TEMPBUF short_tempbuf
#elif (R_DRAWCOLUMN_PIPELINE_BITS == 16)
#define SCREENTYPE unsigned short
#define TEMPBUF short_tempbuf
#elif (R_DRAWCOLUMN_PIPELINE_BITS == 32)
#define SCREENTYPE unsigned int
#define TEMPBUF int_tempbuf
#endif
#define GETDESTCOLOR8(col) (col)
#define GETDESTCOLOR15(col) (col)
#define GETDESTCOLOR16(col) (col)
#define GETDESTCOLOR32(col) (col)
#if (R_DRAWCOLUMN_PIPELINE & RDC_TRANSLATED)
#define GETCOL8_MAPPED(col) (translation[(col)])
#else
#define GETCOL8_MAPPED(col) (col)
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_NOCOLMAP)
#define GETCOL8_DEPTH(col) GETCOL8_MAPPED(col)
#else
#if (R_DRAWCOLUMN_PIPELINE & RDC_DITHERZ)
#define GETCOL8_DEPTH(col) (dither_colormaps[filter_getDitheredPixelLevel(x, y, fracz)][GETCOL8_MAPPED(col)])
#else
#define GETCOL8_DEPTH(col) colormap[GETCOL8_MAPPED(col)]
#endif
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_BILINEAR)
#define GETCOL8(frac, nextfrac) GETCOL8_DEPTH(filter_getDitheredForColumn(x,y,frac,nextfrac))
#define GETCOL15(frac, nextfrac) filter_getFilteredForColumn15(GETCOL8_DEPTH,frac,nextfrac)
#define GETCOL16(frac, nextfrac) filter_getFilteredForColumn16(GETCOL8_DEPTH,frac,nextfrac)
#define GETCOL32(frac, nextfrac) filter_getFilteredForColumn32(GETCOL8_DEPTH,frac,nextfrac)
#elif (R_DRAWCOLUMN_PIPELINE & RDC_ROUNDED)
#define GETCOL8(frac, nextfrac) GETCOL8_DEPTH(filter_getRoundedForColumn(frac,nextfrac))
#define GETCOL15(frac, nextfrac) VID_PAL15(GETCOL8_DEPTH(filter_getRoundedForColumn(frac,nextfrac)), VID_COLORWEIGHTMASK)
#define GETCOL16(frac, nextfrac) VID_PAL16(GETCOL8_DEPTH(filter_getRoundedForColumn(frac,nextfrac)), VID_COLORWEIGHTMASK)
#define GETCOL32(frac, nextfrac) VID_PAL32(GETCOL8_DEPTH(filter_getRoundedForColumn(frac,nextfrac)), VID_COLORWEIGHTMASK)
#else
#define GETCOL8(frac, nextfrac) GETCOL8_DEPTH(source[(frac)>>FRACBITS])
#define GETCOL15(frac, nextfrac) VID_PAL15(GETCOL8_DEPTH(source[(frac)>>FRACBITS]), VID_COLORWEIGHTMASK)
#define GETCOL16(frac, nextfrac) VID_PAL16(GETCOL8_DEPTH(source[(frac)>>FRACBITS]), VID_COLORWEIGHTMASK)
#define GETCOL32(frac, nextfrac) VID_PAL32(GETCOL8_DEPTH(source[(frac)>>FRACBITS]), VID_COLORWEIGHTMASK)
#endif
#if (R_DRAWCOLUMN_PIPELINE & (RDC_BILINEAR|RDC_ROUNDED|RDC_DITHERZ))
#define INCY(y) (y++)
#else
#define INCY(y)
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_TRANSLUCENT)
#define COLTYPE (COL_TRANS)
#elif (R_DRAWCOLUMN_PIPELINE & RDC_FUZZ)
#define COLTYPE (COL_FUZZ)
#else
#define COLTYPE (COL_OPAQUE)
#endif
#if (R_DRAWCOLUMN_PIPELINE_BITS == 8)
#define GETCOL(frac, nextfrac) GETCOL8(frac, nextfrac)
#define GETDESTCOLOR(col) GETDESTCOLOR8(col)
#elif (R_DRAWCOLUMN_PIPELINE_BITS == 15)
#define GETCOL(frac, nextfrac) GETCOL15(frac, nextfrac)
#define GETDESTCOLOR(col) GETDESTCOLOR15(col)
#elif (R_DRAWCOLUMN_PIPELINE_BITS == 16)
#define GETCOL(frac, nextfrac) GETCOL16(frac, nextfrac)
#define GETDESTCOLOR(col) GETDESTCOLOR16(col)
#elif (R_DRAWCOLUMN_PIPELINE_BITS == 32)
#define GETCOL(frac, nextfrac) GETCOL32(frac, nextfrac)
#define GETDESTCOLOR(col) GETDESTCOLOR32(col)
#endif
static void R_DRAWCOLUMN_FUNCNAME(draw_column_vars_t *dcvars)
{
int count;
SCREENTYPE *dest; // killough
fixed_t frac;
const fixed_t fracstep = dcvars->iscale;
#if ((R_DRAWCOLUMN_PIPELINE & RDC_BILINEAR) && (R_DRAWCOLUMN_PIPELINE_BITS != 8))
const fixed_t slope_texu = (dcvars->source == dcvars->nextsource) ? 0 : dcvars->texu & 0xffff;
#else
const fixed_t slope_texu = dcvars->texu;
#endif
// drop back to point filtering if we're minifying
#if (R_DRAWCOLUMN_PIPELINE & (RDC_BILINEAR|RDC_ROUNDED))
if (dcvars->iscale > drawvars.mag_threshold) {
R_GetDrawColumnFunc(R_DRAWCOLUMN_PIPELINE_TYPE,
RDRAW_FILTER_POINT,
drawvars.filterz)(dcvars);
return;
}
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_FUZZ)
// Adjust borders. Low...
if (!dcvars->yl)
dcvars->yl = 1;
// .. and high.
if (dcvars->yh == viewheight-1)
dcvars->yh = viewheight - 2;
#endif
// leban 1/17/99:
// removed the + 1 here, adjusted the if test, and added an increment
// later. this helps a compiler pipeline a bit better. the x86
// assembler also does this.
count = dcvars->yh - dcvars->yl;
// leban 1/17/99:
// this case isn't executed too often. depending on how many instructions
// there are between here and the second if test below, this case could
// be moved down and might save instructions overall. since there are
// probably different wads that favor one way or the other, i'll leave
// this alone for now.
if (count < 0) // Zero length, column does not exceed a pixel.
return;
#ifdef RANGECHECK
if (dcvars->x >= SCREENWIDTH
|| dcvars->yl < 0
|| dcvars->yh >= SCREENHEIGHT)
I_Error("R_DrawColumn: %i to %i at %i", dcvars->yl, dcvars->yh, dcvars->x);
#endif
// Determine scaling, which is the only mapping to be done.
#if (R_DRAWCOLUMN_PIPELINE & RDC_BILINEAR)
frac = dcvars->texturemid - (FRACUNIT>>1) + (dcvars->yl-centery)*fracstep;
#else
frac = dcvars->texturemid + (dcvars->yl-centery)*fracstep;
#endif
if (dcvars->drawingmasked && dcvars->edgetype == RDRAW_MASKEDCOLUMNEDGE_SLOPED) {
// slope the top and bottom column edge based on the fractional u coordinate
// and dcvars->edgeslope, which were set in R_DrawMaskedColumn
// in r_things.c
if (dcvars->yl != 0) {
if (dcvars->edgeslope & RDRAW_EDGESLOPE_TOP_UP) {
// [/#]
int shift = ((0xffff-(slope_texu & 0xffff))/dcvars->iscale);
dcvars->yl += shift;
count -= shift;
frac += 0xffff-(slope_texu & 0xffff);
}
else if (dcvars->edgeslope & RDRAW_EDGESLOPE_TOP_DOWN) {
// [#\]
int shift = ((slope_texu & 0xffff)/dcvars->iscale);
dcvars->yl += shift;
count -= shift;
frac += slope_texu & 0xffff;
}
}
if (dcvars->yh != viewheight-1) {
if (dcvars->edgeslope & RDRAW_EDGESLOPE_BOT_UP) {
// [#/]
int shift = ((0xffff-(slope_texu & 0xffff))/dcvars->iscale);
dcvars->yh -= shift;
count -= shift;
}
else if (dcvars->edgeslope & RDRAW_EDGESLOPE_BOT_DOWN) {
// [\#]
int shift = ((slope_texu & 0xffff)/dcvars->iscale);
dcvars->yh -= shift;
count -= shift;
}
}
if (count <= 0) return;
}
// Framebuffer destination address.
// SoM: MAGIC
{
// haleyjd: reordered predicates
if(temp_x == 4 ||
(temp_x && (temptype != COLTYPE || temp_x + startx != dcvars->x)))
R_FlushColumns();
if(!temp_x)
{
startx = dcvars->x;
tempyl[0] = commontop = dcvars->yl;
tempyh[0] = commonbot = dcvars->yh;
temptype = COLTYPE;
#if (R_DRAWCOLUMN_PIPELINE & RDC_TRANSLUCENT)
temptranmap = tranmap;
#elif (R_DRAWCOLUMN_PIPELINE & RDC_FUZZ)
tempfuzzmap = fullcolormap; // SoM 7-28-04: Fix the fuzz problem.
#endif
R_FlushWholeColumns = R_FLUSHWHOLE_FUNCNAME;
R_FlushHTColumns = R_FLUSHHEADTAIL_FUNCNAME;
R_FlushQuadColumn = R_FLUSHQUAD_FUNCNAME;
dest = &TEMPBUF[dcvars->yl << 2];
} else {
tempyl[temp_x] = dcvars->yl;
tempyh[temp_x] = dcvars->yh;
if(dcvars->yl > commontop)
commontop = dcvars->yl;
if(dcvars->yh < commonbot)
commonbot = dcvars->yh;
dest = &TEMPBUF[(dcvars->yl << 2) + temp_x];
}
temp_x += 1;
}
// do nothing else when drawin fuzz columns
#if (!(R_DRAWCOLUMN_PIPELINE & RDC_FUZZ))
{
const byte *source = dcvars->source;
const lighttable_t *colormap = dcvars->colormap;
const byte *translation = dcvars->translation;
#if (R_DRAWCOLUMN_PIPELINE & (RDC_BILINEAR|RDC_ROUNDED|RDC_DITHERZ))
int y = dcvars->yl;
const int x = dcvars->x;
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_DITHERZ)
const int fracz = (dcvars->z >> 6) & 255;
const byte *dither_colormaps[2] = { dcvars->colormap, dcvars->nextcolormap };
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_BILINEAR)
#if (R_DRAWCOLUMN_PIPELINE_BITS == 8)
const int yl = dcvars->yl;
const byte *dither_sources[2] = { dcvars->source, dcvars->nextsource };
const unsigned int filter_fracu = (dcvars->source == dcvars->nextsource) ? 0 : (dcvars->texu>>8) & 0xff;
#else
const byte *nextsource = dcvars->nextsource;
const unsigned int filter_fracu = (dcvars->source == dcvars->nextsource) ? 0 : dcvars->texu & 0xffff;
#endif
#endif
#if (R_DRAWCOLUMN_PIPELINE & RDC_ROUNDED)
const byte *prevsource = dcvars->prevsource;
const byte *nextsource = dcvars->nextsource;
const unsigned int filter_fracu = (dcvars->source == dcvars->nextsource) ? 0 : (dcvars->texu>>8) & 0xff;
#endif
count++;
// Inner loop that does the actual texture mapping,
// e.g. a DDA-lile scaling.
// This is as fast as it gets. (Yeah, right!!! -- killough)
//
// killough 2/1/98: more performance tuning
if (dcvars->texheight == 128) {
#define FIXEDT_128MASK ((127<<FRACBITS)|0xffff)
while(count--) {
*dest = GETDESTCOLOR(GETCOL(frac & FIXEDT_128MASK, (frac+FRACUNIT) & FIXEDT_128MASK));
INCY(y);
dest += 4;
frac += fracstep;
}
} else if (dcvars->texheight == 0) {
/* cph - another special case */
while (count--) {
*dest = GETDESTCOLOR(GETCOL(frac, (frac+FRACUNIT)));
INCY(y);
dest += 4;
frac += fracstep;
}
} else {
unsigned heightmask = dcvars->texheight-1; // CPhipps - specify type
if (! (dcvars->texheight & heightmask) ) { // power of 2 -- killough
fixed_t fixedt_heightmask = (heightmask<<FRACBITS)|0xffff;
while ((count-=2)>=0) { // texture height is a power of 2 -- killough
*dest = GETDESTCOLOR(GETCOL(frac & fixedt_heightmask, (frac+FRACUNIT) & fixedt_heightmask));
INCY(y);
dest += 4;
frac += fracstep;
*dest = GETDESTCOLOR(GETCOL(frac & fixedt_heightmask, (frac+FRACUNIT) & fixedt_heightmask));
INCY(y);
dest += 4;
frac += fracstep;
}
if (count & 1)
*dest = GETDESTCOLOR(GETCOL(frac & fixedt_heightmask, (frac+FRACUNIT) & fixedt_heightmask));
INCY(y);
} else {
fixed_t nextfrac = 0;
heightmask++;
heightmask <<= FRACBITS;
if (frac < 0)
while ((frac += heightmask) < 0);
else
while (frac >= (int)heightmask)
frac -= heightmask;
#if (R_DRAWCOLUMN_PIPELINE & (RDC_BILINEAR|RDC_ROUNDED))
nextfrac = frac + FRACUNIT;
while (nextfrac >= (int)heightmask)
nextfrac -= heightmask;
#endif
#define INCFRAC(f) if ((f += fracstep) >= (int)heightmask) f -= heightmask;
while (count--) {
// Re-map color indices from wall texture column
// using a lighting/special effects LUT.
// heightmask is the Tutti-Frutti fix -- killough
*dest = GETDESTCOLOR(GETCOL(frac, nextfrac));
INCY(y);
dest += 4;
INCFRAC(frac);
#if (R_DRAWCOLUMN_PIPELINE & (RDC_BILINEAR|RDC_ROUNDED))
INCFRAC(nextfrac);
#endif
}
}
}
}
#endif // (!(R_DRAWCOLUMN_PIPELINE & RDC_FUZZ))
}
#undef GETDESTCOLOR32
#undef GETDESTCOLOR16
#undef GETDESTCOLOR15
#undef GETDESTCOLOR8
#undef GETDESTCOLOR
#undef GETCOL8_MAPPED
#undef GETCOL8_DEPTH
#undef GETCOL32
#undef GETCOL16
#undef GETCOL15
#undef GETCOL8
#undef GETCOL
#undef INCY
#undef INCFRAC
#undef COLTYPE
#undef TEMPBUF
#undef SCREENTYPE
#undef R_DRAWCOLUMN_FUNCNAME
#undef R_DRAWCOLUMN_PIPELINE
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