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1583 lines
41 KiB
C
1583 lines
41 KiB
C
// SONIC ROBO BLAST 2
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//-----------------------------------------------------------------------------
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// Copyright (C) 1998-2000 by DooM Legacy Team.
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// Copyright (C) 1999-2023 by Sonic Team Junior.
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//
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// This program is free software distributed under the
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// terms of the GNU General Public License, version 2.
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// See the 'LICENSE' file for more details.
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//-----------------------------------------------------------------------------
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/// \file r_draw8_npo2.c
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/// \brief 8bpp span drawer functions (for non-powers-of-two flat dimensions)
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/// \note no includes because this is included as part of r_draw.c
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// ==========================================================================
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// SPANS
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// ==========================================================================
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#define SPANSIZE 16
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#define INVSPAN 0.0625f
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#if defined(__GNUC__) || defined(__clang__) // Suppress intentional libdivide compiler warnings - Also added to libdivide.h
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Waggregate-return"
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#endif
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/** \brief The R_DrawSpan_NPO2_8 function
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Draws the actual span.
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*/
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void R_DrawSpan_NPO2_8 (void)
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{
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fixed_t xposition;
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fixed_t yposition;
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fixed_t xstep, ystep;
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fixed_t x, y;
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fixed_t fixedwidth, fixedheight;
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UINT8 *source;
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UINT8 *colormap;
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UINT8 *dest;
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const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
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size_t count = (ds_x2 - ds_x1 + 1);
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xposition = ds_xfrac; yposition = ds_yfrac;
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xstep = ds_xstep; ystep = ds_ystep;
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source = ds_source;
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colormap = ds_colormap;
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dest = ylookup[ds_y] + columnofs[ds_x1];
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if (dest+8 > deststop)
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return;
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fixedwidth = ds_flatwidth << FRACBITS;
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fixedheight = ds_flatheight << FRACBITS;
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// Fix xposition and yposition if they are out of bounds.
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if (xposition < 0)
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xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
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else if (xposition >= fixedwidth)
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xposition %= fixedwidth;
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if (yposition < 0)
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yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
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else if (yposition >= fixedheight)
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yposition %= fixedheight;
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while (count-- && dest <= deststop)
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{
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// The loops here keep the texture coordinates within the texture.
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// They will rarely iterate multiple times, and are cheaper than a modulo operation,
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// even if using libdivide.
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if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
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while (xposition < 0)
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xposition += fixedwidth;
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else
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while (xposition >= fixedwidth)
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xposition -= fixedwidth;
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if (ystep < 0)
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while (yposition < 0)
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yposition += fixedheight;
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else
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while (yposition >= fixedheight)
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yposition -= fixedheight;
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x = (xposition >> FRACBITS);
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y = (yposition >> FRACBITS);
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*dest++ = colormap[source[((y * ds_flatwidth) + x)]];
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xposition += xstep;
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yposition += ystep;
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}
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}
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/** \brief The R_DrawTiltedSpan_NPO2_8 function
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Draw slopes! Holy sheit!
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*/
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void R_DrawTiltedSpan_NPO2_8(void)
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{
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// x1, x2 = ds_x1, ds_x2
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int width = ds_x2 - ds_x1;
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double iz, uz, vz;
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UINT32 u, v;
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int i;
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UINT8 *source;
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UINT8 *colormap;
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UINT8 *dest;
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double startz, startu, startv;
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double izstep, uzstep, vzstep;
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double endz, endu, endv;
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UINT32 stepu, stepv;
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struct libdivide_u32_t x_divider = libdivide_u32_gen(ds_flatwidth);
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struct libdivide_u32_t y_divider = libdivide_u32_gen(ds_flatheight);
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iz = ds_szp->z + ds_szp->y*(centery-ds_y) + ds_szp->x*(ds_x1-centerx);
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CALC_SLOPE_LIGHT
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uz = ds_sup->z + ds_sup->y*(centery-ds_y) + ds_sup->x*(ds_x1-centerx);
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vz = ds_svp->z + ds_svp->y*(centery-ds_y) + ds_svp->x*(ds_x1-centerx);
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dest = ylookup[ds_y] + columnofs[ds_x1];
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source = ds_source;
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//colormap = ds_colormap;
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#if 0 // The "perfect" reference version of this routine. Pretty slow.
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// Use it only to see how things are supposed to look.
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i = 0;
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do
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{
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double z = 1.f/iz;
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u = (INT64)(uz*z);
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v = (INT64)(vz*z);
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = colormap[source[((y * ds_flatwidth) + x)]];
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}
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dest++;
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iz += ds_szp->x;
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uz += ds_sup->x;
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vz += ds_svp->x;
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} while (--width >= 0);
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#else
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startz = 1.f/iz;
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startu = uz*startz;
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startv = vz*startz;
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izstep = ds_szp->x * SPANSIZE;
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uzstep = ds_sup->x * SPANSIZE;
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vzstep = ds_svp->x * SPANSIZE;
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//x1 = 0;
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width++;
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while (width >= SPANSIZE)
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{
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iz += izstep;
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uz += uzstep;
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vz += vzstep;
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endz = 1.f/iz;
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endu = uz*endz;
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endv = vz*endz;
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stepu = (INT64)((endu - startu) * INVSPAN);
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stepv = (INT64)((endv - startv) * INVSPAN);
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u = (INT64)(startu);
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v = (INT64)(startv);
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for (i = SPANSIZE-1; i >= 0; i--)
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{
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = colormap[source[((y * ds_flatwidth) + x)]];
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}
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dest++;
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u += stepu;
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v += stepv;
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}
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startu = endu;
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startv = endv;
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width -= SPANSIZE;
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}
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if (width > 0)
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{
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if (width == 1)
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{
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u = (INT64)(startu);
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v = (INT64)(startv);
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = colormap[source[((y * ds_flatwidth) + x)]];
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}
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}
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else
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{
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double left = width;
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iz += ds_szp->x * left;
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uz += ds_sup->x * left;
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vz += ds_svp->x * left;
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endz = 1.f/iz;
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endu = uz*endz;
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endv = vz*endz;
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left = 1.f/left;
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stepu = (INT64)((endu - startu) * left);
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stepv = (INT64)((endv - startv) * left);
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u = (INT64)(startu);
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v = (INT64)(startv);
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for (; width != 0; width--)
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{
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = colormap[source[((y * ds_flatwidth) + x)]];
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}
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dest++;
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u += stepu;
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v += stepv;
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}
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}
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}
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#endif
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}
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/** \brief The R_DrawTiltedTranslucentSpan_NPO2_8 function
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Like DrawTiltedSpan_NPO2, but translucent
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*/
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void R_DrawTiltedTranslucentSpan_NPO2_8(void)
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{
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// x1, x2 = ds_x1, ds_x2
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int width = ds_x2 - ds_x1;
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double iz, uz, vz;
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UINT32 u, v;
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int i;
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UINT8 *source;
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UINT8 *colormap;
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UINT8 *dest;
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double startz, startu, startv;
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double izstep, uzstep, vzstep;
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double endz, endu, endv;
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UINT32 stepu, stepv;
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struct libdivide_u32_t x_divider = libdivide_u32_gen(ds_flatwidth);
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struct libdivide_u32_t y_divider = libdivide_u32_gen(ds_flatheight);
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iz = ds_szp->z + ds_szp->y*(centery-ds_y) + ds_szp->x*(ds_x1-centerx);
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CALC_SLOPE_LIGHT
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uz = ds_sup->z + ds_sup->y*(centery-ds_y) + ds_sup->x*(ds_x1-centerx);
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vz = ds_svp->z + ds_svp->y*(centery-ds_y) + ds_svp->x*(ds_x1-centerx);
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dest = ylookup[ds_y] + columnofs[ds_x1];
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source = ds_source;
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//colormap = ds_colormap;
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#if 0 // The "perfect" reference version of this routine. Pretty slow.
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// Use it only to see how things are supposed to look.
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i = 0;
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do
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{
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double z = 1.f/iz;
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u = (INT64)(uz*z);
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v = (INT64)(vz*z);
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dest);
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}
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dest++;
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iz += ds_szp->x;
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uz += ds_sup->x;
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vz += ds_svp->x;
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} while (--width >= 0);
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#else
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startz = 1.f/iz;
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startu = uz*startz;
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startv = vz*startz;
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izstep = ds_szp->x * SPANSIZE;
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uzstep = ds_sup->x * SPANSIZE;
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vzstep = ds_svp->x * SPANSIZE;
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//x1 = 0;
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width++;
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while (width >= SPANSIZE)
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{
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iz += izstep;
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uz += uzstep;
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vz += vzstep;
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endz = 1.f/iz;
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endu = uz*endz;
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endv = vz*endz;
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stepu = (INT64)((endu - startu) * INVSPAN);
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stepv = (INT64)((endv - startv) * INVSPAN);
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u = (INT64)(startu);
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v = (INT64)(startv);
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for (i = SPANSIZE-1; i >= 0; i--)
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{
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dest);
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}
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dest++;
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u += stepu;
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v += stepv;
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}
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startu = endu;
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startv = endv;
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width -= SPANSIZE;
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}
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if (width > 0)
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{
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if (width == 1)
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{
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u = (INT64)(startu);
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v = (INT64)(startv);
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dest);
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}
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}
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else
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{
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double left = width;
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iz += ds_szp->x * left;
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uz += ds_sup->x * left;
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vz += ds_svp->x * left;
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endz = 1.f/iz;
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endu = uz*endz;
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endv = vz*endz;
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left = 1.f/left;
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stepu = (INT64)((endu - startu) * left);
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stepv = (INT64)((endv - startv) * left);
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u = (INT64)(startu);
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v = (INT64)(startv);
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for (; width != 0; width--)
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{
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colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
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// Lactozilla: Non-powers-of-two
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{
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fixed_t x = (((fixed_t)u) >> FRACBITS);
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fixed_t y = (((fixed_t)v) >> FRACBITS);
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// Carefully align all of my Friends.
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if (x < 0)
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x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
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else
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x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
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if (y < 0)
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y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
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else
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y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
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|
|
*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dest);
|
|
}
|
|
dest++;
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void R_DrawTiltedSplat_NPO2_8(void)
|
|
{
|
|
// x1, x2 = ds_x1, ds_x2
|
|
int width = ds_x2 - ds_x1;
|
|
double iz, uz, vz;
|
|
UINT32 u, v;
|
|
int i;
|
|
|
|
UINT8 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
|
|
UINT8 val;
|
|
|
|
double startz, startu, startv;
|
|
double izstep, uzstep, vzstep;
|
|
double endz, endu, endv;
|
|
UINT32 stepu, stepv;
|
|
|
|
struct libdivide_u32_t x_divider = libdivide_u32_gen(ds_flatwidth);
|
|
struct libdivide_u32_t y_divider = libdivide_u32_gen(ds_flatheight);
|
|
|
|
iz = ds_szp->z + ds_szp->y*(centery-ds_y) + ds_szp->x*(ds_x1-centerx);
|
|
|
|
CALC_SLOPE_LIGHT
|
|
|
|
uz = ds_sup->z + ds_sup->y*(centery-ds_y) + ds_sup->x*(ds_x1-centerx);
|
|
vz = ds_svp->z + ds_svp->y*(centery-ds_y) + ds_svp->x*(ds_x1-centerx);
|
|
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
source = ds_source;
|
|
//colormap = ds_colormap;
|
|
|
|
#if 0 // The "perfect" reference version of this routine. Pretty slow.
|
|
// Use it only to see how things are supposed to look.
|
|
i = 0;
|
|
do
|
|
{
|
|
double z = 1.f/iz;
|
|
u = (INT64)(uz*z);
|
|
v = (INT64)(vz*z);
|
|
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
}
|
|
|
|
if (val != TRANSPARENTPIXEL)
|
|
*dest = colormap[val];
|
|
|
|
dest++;
|
|
iz += ds_szp->x;
|
|
uz += ds_sup->x;
|
|
vz += ds_svp->x;
|
|
} while (--width >= 0);
|
|
#else
|
|
startz = 1.f/iz;
|
|
startu = uz*startz;
|
|
startv = vz*startz;
|
|
|
|
izstep = ds_szp->x * SPANSIZE;
|
|
uzstep = ds_sup->x * SPANSIZE;
|
|
vzstep = ds_svp->x * SPANSIZE;
|
|
//x1 = 0;
|
|
width++;
|
|
|
|
while (width >= SPANSIZE)
|
|
{
|
|
iz += izstep;
|
|
uz += uzstep;
|
|
vz += vzstep;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
stepu = (INT64)((endu - startu) * INVSPAN);
|
|
stepv = (INT64)((endv - startv) * INVSPAN);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (i = SPANSIZE-1; i >= 0; i--)
|
|
{
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
}
|
|
if (val != TRANSPARENTPIXEL)
|
|
*dest = colormap[val];
|
|
dest++;
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
startu = endu;
|
|
startv = endv;
|
|
width -= SPANSIZE;
|
|
}
|
|
if (width > 0)
|
|
{
|
|
if (width == 1)
|
|
{
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
}
|
|
if (val != TRANSPARENTPIXEL)
|
|
*dest = colormap[val];
|
|
}
|
|
else
|
|
{
|
|
double left = width;
|
|
iz += ds_szp->x * left;
|
|
uz += ds_sup->x * left;
|
|
vz += ds_svp->x * left;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
left = 1.f/left;
|
|
stepu = (INT64)((endu - startu) * left);
|
|
stepv = (INT64)((endv - startv) * left);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (; width != 0; width--)
|
|
{
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
}
|
|
if (val != TRANSPARENTPIXEL)
|
|
*dest = colormap[val];
|
|
dest++;
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/** \brief The R_DrawSplat_NPO2_8 function
|
|
Just like R_DrawSpan_NPO2_8, but skips transparent pixels.
|
|
*/
|
|
void R_DrawSplat_NPO2_8 (void)
|
|
{
|
|
fixed_t xposition;
|
|
fixed_t yposition;
|
|
fixed_t xstep, ystep;
|
|
fixed_t x, y;
|
|
fixed_t fixedwidth, fixedheight;
|
|
|
|
UINT8 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
|
|
|
|
size_t count = (ds_x2 - ds_x1 + 1);
|
|
UINT32 val;
|
|
|
|
xposition = ds_xfrac; yposition = ds_yfrac;
|
|
xstep = ds_xstep; ystep = ds_ystep;
|
|
|
|
source = ds_source;
|
|
colormap = ds_colormap;
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
|
|
fixedwidth = ds_flatwidth << FRACBITS;
|
|
fixedheight = ds_flatheight << FRACBITS;
|
|
|
|
// Fix xposition and yposition if they are out of bounds.
|
|
if (xposition < 0)
|
|
xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
|
|
else if (xposition >= fixedwidth)
|
|
xposition %= fixedwidth;
|
|
if (yposition < 0)
|
|
yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
|
|
else if (yposition >= fixedheight)
|
|
yposition %= fixedheight;
|
|
|
|
while (count-- && dest <= deststop)
|
|
{
|
|
// The loops here keep the texture coordinates within the texture.
|
|
// They will rarely iterate multiple times, and are cheaper than a modulo operation,
|
|
// even if using libdivide.
|
|
if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
|
|
while (xposition < 0)
|
|
xposition += fixedwidth;
|
|
else
|
|
while (xposition >= fixedwidth)
|
|
xposition -= fixedwidth;
|
|
if (ystep < 0)
|
|
while (yposition < 0)
|
|
yposition += fixedheight;
|
|
else
|
|
while (yposition >= fixedheight)
|
|
yposition -= fixedheight;
|
|
|
|
x = (xposition >> FRACBITS);
|
|
y = (yposition >> FRACBITS);
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val != TRANSPARENTPIXEL)
|
|
*dest = colormap[val];
|
|
dest++;
|
|
xposition += xstep;
|
|
yposition += ystep;
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawTranslucentSplat_NPO2_8 function
|
|
Just like R_DrawSplat_NPO2_8, but is translucent!
|
|
*/
|
|
void R_DrawTranslucentSplat_NPO2_8 (void)
|
|
{
|
|
fixed_t xposition;
|
|
fixed_t yposition;
|
|
fixed_t xstep, ystep;
|
|
fixed_t x, y;
|
|
fixed_t fixedwidth, fixedheight;
|
|
|
|
UINT8 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
|
|
|
|
size_t count = (ds_x2 - ds_x1 + 1);
|
|
UINT32 val;
|
|
|
|
xposition = ds_xfrac; yposition = ds_yfrac;
|
|
xstep = ds_xstep; ystep = ds_ystep;
|
|
|
|
source = ds_source;
|
|
colormap = ds_colormap;
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
|
|
fixedwidth = ds_flatwidth << FRACBITS;
|
|
fixedheight = ds_flatheight << FRACBITS;
|
|
|
|
// Fix xposition and yposition if they are out of bounds.
|
|
if (xposition < 0)
|
|
xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
|
|
else if (xposition >= fixedwidth)
|
|
xposition %= fixedwidth;
|
|
if (yposition < 0)
|
|
yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
|
|
else if (yposition >= fixedheight)
|
|
yposition %= fixedheight;
|
|
|
|
while (count-- && dest <= deststop)
|
|
{
|
|
// The loops here keep the texture coordinates within the texture.
|
|
// They will rarely iterate multiple times, and are cheaper than a modulo operation,
|
|
// even if using libdivide.
|
|
if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
|
|
while (xposition < 0)
|
|
xposition += fixedwidth;
|
|
else
|
|
while (xposition >= fixedwidth)
|
|
xposition -= fixedwidth;
|
|
if (ystep < 0)
|
|
while (yposition < 0)
|
|
yposition += fixedheight;
|
|
else
|
|
while (yposition >= fixedheight)
|
|
yposition -= fixedheight;
|
|
|
|
x = (xposition >> FRACBITS);
|
|
y = (yposition >> FRACBITS);
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val != TRANSPARENTPIXEL)
|
|
*dest = *(ds_transmap + (colormap[val] << 8) + *dest);
|
|
dest++;
|
|
xposition += xstep;
|
|
yposition += ystep;
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawFloorSprite_NPO2_8 function
|
|
Just like R_DrawSplat_NPO2_8, but for floor sprites.
|
|
*/
|
|
void R_DrawFloorSprite_NPO2_8 (void)
|
|
{
|
|
fixed_t xposition;
|
|
fixed_t yposition;
|
|
fixed_t xstep, ystep;
|
|
fixed_t x, y;
|
|
fixed_t fixedwidth, fixedheight;
|
|
|
|
UINT16 *source;
|
|
UINT8 *translation;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
|
|
|
|
size_t count = (ds_x2 - ds_x1 + 1);
|
|
UINT32 val;
|
|
|
|
xposition = ds_xfrac; yposition = ds_yfrac;
|
|
xstep = ds_xstep; ystep = ds_ystep;
|
|
|
|
source = (UINT16 *)ds_source;
|
|
colormap = ds_colormap;
|
|
translation = ds_translation;
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
|
|
fixedwidth = ds_flatwidth << FRACBITS;
|
|
fixedheight = ds_flatheight << FRACBITS;
|
|
|
|
// Fix xposition and yposition if they are out of bounds.
|
|
if (xposition < 0)
|
|
xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
|
|
else if (xposition >= fixedwidth)
|
|
xposition %= fixedwidth;
|
|
if (yposition < 0)
|
|
yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
|
|
else if (yposition >= fixedheight)
|
|
yposition %= fixedheight;
|
|
|
|
while (count-- && dest <= deststop)
|
|
{
|
|
// The loops here keep the texture coordinates within the texture.
|
|
// They will rarely iterate multiple times, and are cheaper than a modulo operation,
|
|
// even if using libdivide.
|
|
if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
|
|
while (xposition < 0)
|
|
xposition += fixedwidth;
|
|
else
|
|
while (xposition >= fixedwidth)
|
|
xposition -= fixedwidth;
|
|
if (ystep < 0)
|
|
while (yposition < 0)
|
|
yposition += fixedheight;
|
|
else
|
|
while (yposition >= fixedheight)
|
|
yposition -= fixedheight;
|
|
|
|
x = (xposition >> FRACBITS);
|
|
y = (yposition >> FRACBITS);
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = colormap[translation[val & 0xFF]];
|
|
dest++;
|
|
xposition += xstep;
|
|
yposition += ystep;
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawTranslucentFloorSprite_NPO2_8 function
|
|
Just like R_DrawFloorSprite_NPO2_8, but is translucent!
|
|
*/
|
|
void R_DrawTranslucentFloorSprite_NPO2_8 (void)
|
|
{
|
|
fixed_t xposition;
|
|
fixed_t yposition;
|
|
fixed_t xstep, ystep;
|
|
fixed_t x, y;
|
|
fixed_t fixedwidth, fixedheight;
|
|
|
|
UINT16 *source;
|
|
UINT8 *translation;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
|
|
|
|
size_t count = (ds_x2 - ds_x1 + 1);
|
|
UINT32 val;
|
|
|
|
xposition = ds_xfrac; yposition = ds_yfrac;
|
|
xstep = ds_xstep; ystep = ds_ystep;
|
|
|
|
source = (UINT16 *)ds_source;
|
|
colormap = ds_colormap;
|
|
translation = ds_translation;
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
|
|
fixedwidth = ds_flatwidth << FRACBITS;
|
|
fixedheight = ds_flatheight << FRACBITS;
|
|
|
|
// Fix xposition and yposition if they are out of bounds.
|
|
if (xposition < 0)
|
|
xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
|
|
else if (xposition >= fixedwidth)
|
|
xposition %= fixedwidth;
|
|
if (yposition < 0)
|
|
yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
|
|
else if (yposition >= fixedheight)
|
|
yposition %= fixedheight;
|
|
|
|
while (count-- && dest <= deststop)
|
|
{
|
|
// The loops here keep the texture coordinates within the texture.
|
|
// They will rarely iterate multiple times, and are cheaper than a modulo operation,
|
|
// even if using libdivide.
|
|
if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
|
|
while (xposition < 0)
|
|
xposition += fixedwidth;
|
|
else
|
|
while (xposition >= fixedwidth)
|
|
xposition -= fixedwidth;
|
|
if (ystep < 0)
|
|
while (yposition < 0)
|
|
yposition += fixedheight;
|
|
else
|
|
while (yposition >= fixedheight)
|
|
yposition -= fixedheight;
|
|
|
|
x = (xposition >> FRACBITS);
|
|
y = (yposition >> FRACBITS);
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = *(ds_transmap + (colormap[translation[val & 0xFF]] << 8) + *dest);
|
|
dest++;
|
|
xposition += xstep;
|
|
yposition += ystep;
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawTiltedFloorSprite_NPO2_8 function
|
|
Draws a tilted floor sprite.
|
|
*/
|
|
void R_DrawTiltedFloorSprite_NPO2_8(void)
|
|
{
|
|
// x1, x2 = ds_x1, ds_x2
|
|
int width = ds_x2 - ds_x1;
|
|
double iz, uz, vz;
|
|
UINT32 u, v;
|
|
int i;
|
|
|
|
UINT16 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *translation;
|
|
UINT8 *dest;
|
|
UINT16 val;
|
|
|
|
double startz, startu, startv;
|
|
double izstep, uzstep, vzstep;
|
|
double endz, endu, endv;
|
|
UINT32 stepu, stepv;
|
|
|
|
struct libdivide_u32_t x_divider = libdivide_u32_gen(ds_flatwidth);
|
|
struct libdivide_u32_t y_divider = libdivide_u32_gen(ds_flatheight);
|
|
|
|
iz = ds_szp->z + ds_szp->y*(centery-ds_y) + ds_szp->x*(ds_x1-centerx);
|
|
uz = ds_sup->z + ds_sup->y*(centery-ds_y) + ds_sup->x*(ds_x1-centerx);
|
|
vz = ds_svp->z + ds_svp->y*(centery-ds_y) + ds_svp->x*(ds_x1-centerx);
|
|
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
source = (UINT16 *)ds_source;
|
|
colormap = ds_colormap;
|
|
translation = ds_translation;
|
|
|
|
startz = 1.f/iz;
|
|
startu = uz*startz;
|
|
startv = vz*startz;
|
|
|
|
izstep = ds_szp->x * SPANSIZE;
|
|
uzstep = ds_sup->x * SPANSIZE;
|
|
vzstep = ds_svp->x * SPANSIZE;
|
|
//x1 = 0;
|
|
width++;
|
|
|
|
while (width >= SPANSIZE)
|
|
{
|
|
iz += izstep;
|
|
uz += uzstep;
|
|
vz += vzstep;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
stepu = (INT64)((endu - startu) * INVSPAN);
|
|
stepv = (INT64)((endv - startv) * INVSPAN);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (i = SPANSIZE-1; i >= 0; i--)
|
|
{
|
|
// Lactozilla: Non-powers-of-two
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = colormap[translation[val & 0xFF]];
|
|
dest++;
|
|
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
startu = endu;
|
|
startv = endv;
|
|
width -= SPANSIZE;
|
|
}
|
|
if (width > 0)
|
|
{
|
|
if (width == 1)
|
|
{
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = colormap[translation[val & 0xFF]];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
double left = width;
|
|
iz += ds_szp->x * left;
|
|
uz += ds_sup->x * left;
|
|
vz += ds_svp->x * left;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
left = 1.f/left;
|
|
stepu = (INT64)((endu - startu) * left);
|
|
stepv = (INT64)((endv - startv) * left);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (; width != 0; width--)
|
|
{
|
|
// Lactozilla: Non-powers-of-two
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = colormap[translation[val & 0xFF]];
|
|
dest++;
|
|
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawTiltedTranslucentFloorSprite_NPO2_8 function
|
|
Draws a tilted, translucent, floor sprite.
|
|
*/
|
|
void R_DrawTiltedTranslucentFloorSprite_NPO2_8(void)
|
|
{
|
|
// x1, x2 = ds_x1, ds_x2
|
|
int width = ds_x2 - ds_x1;
|
|
double iz, uz, vz;
|
|
UINT32 u, v;
|
|
int i;
|
|
|
|
UINT16 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *translation;
|
|
UINT8 *dest;
|
|
UINT16 val;
|
|
|
|
double startz, startu, startv;
|
|
double izstep, uzstep, vzstep;
|
|
double endz, endu, endv;
|
|
UINT32 stepu, stepv;
|
|
|
|
struct libdivide_u32_t x_divider = libdivide_u32_gen(ds_flatwidth);
|
|
struct libdivide_u32_t y_divider = libdivide_u32_gen(ds_flatheight);
|
|
|
|
iz = ds_szp->z + ds_szp->y*(centery-ds_y) + ds_szp->x*(ds_x1-centerx);
|
|
uz = ds_sup->z + ds_sup->y*(centery-ds_y) + ds_sup->x*(ds_x1-centerx);
|
|
vz = ds_svp->z + ds_svp->y*(centery-ds_y) + ds_svp->x*(ds_x1-centerx);
|
|
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
source = (UINT16 *)ds_source;
|
|
colormap = ds_colormap;
|
|
translation = ds_translation;
|
|
|
|
startz = 1.f/iz;
|
|
startu = uz*startz;
|
|
startv = vz*startz;
|
|
|
|
izstep = ds_szp->x * SPANSIZE;
|
|
uzstep = ds_sup->x * SPANSIZE;
|
|
vzstep = ds_svp->x * SPANSIZE;
|
|
//x1 = 0;
|
|
width++;
|
|
|
|
while (width >= SPANSIZE)
|
|
{
|
|
iz += izstep;
|
|
uz += uzstep;
|
|
vz += vzstep;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
stepu = (INT64)((endu - startu) * INVSPAN);
|
|
stepv = (INT64)((endv - startv) * INVSPAN);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (i = SPANSIZE-1; i >= 0; i--)
|
|
{
|
|
// Lactozilla: Non-powers-of-two
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = *(ds_transmap + (colormap[translation[val & 0xFF]] << 8) + *dest);
|
|
dest++;
|
|
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
startu = endu;
|
|
startv = endv;
|
|
width -= SPANSIZE;
|
|
}
|
|
if (width > 0)
|
|
{
|
|
if (width == 1)
|
|
{
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = *(ds_transmap + (colormap[translation[val & 0xFF]] << 8) + *dest);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
double left = width;
|
|
iz += ds_szp->x * left;
|
|
uz += ds_sup->x * left;
|
|
vz += ds_svp->x * left;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
left = 1.f/left;
|
|
stepu = (INT64)((endu - startu) * left);
|
|
stepv = (INT64)((endv - startv) * left);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (; width != 0; width--)
|
|
{
|
|
// Lactozilla: Non-powers-of-two
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
val = source[((y * ds_flatwidth) + x)];
|
|
if (val & 0xFF00)
|
|
*dest = *(ds_transmap + (colormap[translation[val & 0xFF]] << 8) + *dest);
|
|
dest++;
|
|
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawTranslucentSpan_NPO2_8 function
|
|
Draws the actual span with translucency.
|
|
*/
|
|
void R_DrawTranslucentSpan_NPO2_8 (void)
|
|
{
|
|
fixed_t xposition;
|
|
fixed_t yposition;
|
|
fixed_t xstep, ystep;
|
|
fixed_t x, y;
|
|
fixed_t fixedwidth, fixedheight;
|
|
|
|
UINT8 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
|
|
|
|
size_t count = (ds_x2 - ds_x1 + 1);
|
|
UINT32 val;
|
|
|
|
xposition = ds_xfrac; yposition = ds_yfrac;
|
|
xstep = ds_xstep; ystep = ds_ystep;
|
|
|
|
source = ds_source;
|
|
colormap = ds_colormap;
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
|
|
fixedwidth = ds_flatwidth << FRACBITS;
|
|
fixedheight = ds_flatheight << FRACBITS;
|
|
|
|
// Fix xposition and yposition if they are out of bounds.
|
|
if (xposition < 0)
|
|
xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
|
|
else if (xposition >= fixedwidth)
|
|
xposition %= fixedwidth;
|
|
if (yposition < 0)
|
|
yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
|
|
else if (yposition >= fixedheight)
|
|
yposition %= fixedheight;
|
|
|
|
while (count-- && dest <= deststop)
|
|
{
|
|
// The loops here keep the texture coordinates within the texture.
|
|
// They will rarely iterate multiple times, and are cheaper than a modulo operation,
|
|
// even if using libdivide.
|
|
if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
|
|
while (xposition < 0)
|
|
xposition += fixedwidth;
|
|
else
|
|
while (xposition >= fixedwidth)
|
|
xposition -= fixedwidth;
|
|
if (ystep < 0)
|
|
while (yposition < 0)
|
|
yposition += fixedheight;
|
|
else
|
|
while (yposition >= fixedheight)
|
|
yposition -= fixedheight;
|
|
|
|
x = (xposition >> FRACBITS);
|
|
y = (yposition >> FRACBITS);
|
|
val = ((y * ds_flatwidth) + x);
|
|
*dest = *(ds_transmap + (colormap[source[val]] << 8) + *dest);
|
|
dest++;
|
|
xposition += xstep;
|
|
yposition += ystep;
|
|
}
|
|
}
|
|
|
|
void R_DrawWaterSpan_NPO2_8(void)
|
|
{
|
|
fixed_t xposition;
|
|
fixed_t yposition;
|
|
fixed_t xstep, ystep;
|
|
fixed_t x, y;
|
|
fixed_t fixedwidth, fixedheight;
|
|
|
|
UINT8 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
UINT8 *dsrc;
|
|
const UINT8 *deststop = screens[0] + vid.rowbytes * vid.height;
|
|
|
|
size_t count = (ds_x2 - ds_x1 + 1);
|
|
|
|
xposition = ds_xfrac; yposition = (ds_yfrac + ds_waterofs);
|
|
xstep = ds_xstep; ystep = ds_ystep;
|
|
|
|
source = ds_source;
|
|
colormap = ds_colormap;
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
dsrc = screens[1] + (ds_y+ds_bgofs)*vid.width + ds_x1;
|
|
|
|
fixedwidth = ds_flatwidth << FRACBITS;
|
|
fixedheight = ds_flatheight << FRACBITS;
|
|
|
|
// Fix xposition and yposition if they are out of bounds.
|
|
if (xposition < 0)
|
|
xposition = fixedwidth - ((UINT32)(fixedwidth - xposition) % fixedwidth);
|
|
else if (xposition >= fixedwidth)
|
|
xposition %= fixedwidth;
|
|
if (yposition < 0)
|
|
yposition = fixedheight - ((UINT32)(fixedheight - yposition) % fixedheight);
|
|
else if (yposition >= fixedheight)
|
|
yposition %= fixedheight;
|
|
|
|
while (count-- && dest <= deststop)
|
|
{
|
|
// The loops here keep the texture coordinates within the texture.
|
|
// They will rarely iterate multiple times, and are cheaper than a modulo operation,
|
|
// even if using libdivide.
|
|
if (xstep < 0) // These if statements are hopefully hoisted by the compiler to above this loop
|
|
while (xposition < 0)
|
|
xposition += fixedwidth;
|
|
else
|
|
while (xposition >= fixedwidth)
|
|
xposition -= fixedwidth;
|
|
if (ystep < 0)
|
|
while (yposition < 0)
|
|
yposition += fixedheight;
|
|
else
|
|
while (yposition >= fixedheight)
|
|
yposition -= fixedheight;
|
|
|
|
x = (xposition >> FRACBITS);
|
|
y = (yposition >> FRACBITS);
|
|
*dest++ = colormap[*(ds_transmap + (source[((y * ds_flatwidth) + x)] << 8) + *dsrc++)];
|
|
xposition += xstep;
|
|
yposition += ystep;
|
|
}
|
|
}
|
|
|
|
/** \brief The R_DrawTiltedWaterSpan_NPO2_8 function
|
|
Like DrawTiltedTranslucentSpan_NPO2, but for water
|
|
*/
|
|
void R_DrawTiltedWaterSpan_NPO2_8(void)
|
|
{
|
|
// x1, x2 = ds_x1, ds_x2
|
|
int width = ds_x2 - ds_x1;
|
|
double iz, uz, vz;
|
|
UINT32 u, v;
|
|
int i;
|
|
|
|
UINT8 *source;
|
|
UINT8 *colormap;
|
|
UINT8 *dest;
|
|
UINT8 *dsrc;
|
|
|
|
double startz, startu, startv;
|
|
double izstep, uzstep, vzstep;
|
|
double endz, endu, endv;
|
|
UINT32 stepu, stepv;
|
|
|
|
struct libdivide_u32_t x_divider = libdivide_u32_gen(ds_flatwidth);
|
|
struct libdivide_u32_t y_divider = libdivide_u32_gen(ds_flatheight);
|
|
|
|
iz = ds_szp->z + ds_szp->y*(centery-ds_y) + ds_szp->x*(ds_x1-centerx);
|
|
|
|
CALC_SLOPE_LIGHT
|
|
|
|
uz = ds_sup->z + ds_sup->y*(centery-ds_y) + ds_sup->x*(ds_x1-centerx);
|
|
vz = ds_svp->z + ds_svp->y*(centery-ds_y) + ds_svp->x*(ds_x1-centerx);
|
|
|
|
dest = ylookup[ds_y] + columnofs[ds_x1];
|
|
dsrc = screens[1] + (ds_y+ds_bgofs)*vid.width + ds_x1;
|
|
source = ds_source;
|
|
//colormap = ds_colormap;
|
|
|
|
#if 0 // The "perfect" reference version of this routine. Pretty slow.
|
|
// Use it only to see how things are supposed to look.
|
|
i = 0;
|
|
do
|
|
{
|
|
double z = 1.f/iz;
|
|
u = (INT64)(uz*z);
|
|
v = (INT64)(vz*z);
|
|
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dsrc++);
|
|
}
|
|
dest++;
|
|
iz += ds_szp->x;
|
|
uz += ds_sup->x;
|
|
vz += ds_svp->x;
|
|
} while (--width >= 0);
|
|
#else
|
|
startz = 1.f/iz;
|
|
startu = uz*startz;
|
|
startv = vz*startz;
|
|
|
|
izstep = ds_szp->x * SPANSIZE;
|
|
uzstep = ds_sup->x * SPANSIZE;
|
|
vzstep = ds_svp->x * SPANSIZE;
|
|
//x1 = 0;
|
|
width++;
|
|
|
|
while (width >= SPANSIZE)
|
|
{
|
|
iz += izstep;
|
|
uz += uzstep;
|
|
vz += vzstep;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
stepu = (INT64)((endu - startu) * INVSPAN);
|
|
stepv = (INT64)((endv - startv) * INVSPAN);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (i = SPANSIZE-1; i >= 0; i--)
|
|
{
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dsrc++);
|
|
}
|
|
dest++;
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
startu = endu;
|
|
startv = endv;
|
|
width -= SPANSIZE;
|
|
}
|
|
if (width > 0)
|
|
{
|
|
if (width == 1)
|
|
{
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dsrc++);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
double left = width;
|
|
iz += ds_szp->x * left;
|
|
uz += ds_sup->x * left;
|
|
vz += ds_svp->x * left;
|
|
|
|
endz = 1.f/iz;
|
|
endu = uz*endz;
|
|
endv = vz*endz;
|
|
left = 1.f/left;
|
|
stepu = (INT64)((endu - startu) * left);
|
|
stepv = (INT64)((endv - startv) * left);
|
|
u = (INT64)(startu);
|
|
v = (INT64)(startv);
|
|
|
|
for (; width != 0; width--)
|
|
{
|
|
colormap = planezlight[tiltlighting[ds_x1++]] + (ds_colormap - colormaps);
|
|
// Lactozilla: Non-powers-of-two
|
|
{
|
|
fixed_t x = (((fixed_t)u) >> FRACBITS);
|
|
fixed_t y = (((fixed_t)v) >> FRACBITS);
|
|
|
|
// Carefully align all of my Friends.
|
|
if (x < 0)
|
|
x += (libdivide_u32_do((UINT32)(-x-1), &x_divider) + 1) * ds_flatwidth;
|
|
else
|
|
x -= libdivide_u32_do((UINT32)x, &x_divider) * ds_flatwidth;
|
|
if (y < 0)
|
|
y += (libdivide_u32_do((UINT32)(-y-1), &y_divider) + 1) * ds_flatheight;
|
|
else
|
|
y -= libdivide_u32_do((UINT32)y, &y_divider) * ds_flatheight;
|
|
|
|
*dest = *(ds_transmap + (colormap[source[((y * ds_flatwidth) + x)]] << 8) + *dsrc++);
|
|
}
|
|
dest++;
|
|
u += stepu;
|
|
v += stepv;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
#if defined(__GNUC__) || defined(__clang__) // Stop suppressing intentional libdivide compiler warnings
|
|
#pragma GCC diagnostic pop
|
|
#endif
|