ref: 49a810aeb5cb996bf9a6d4e3c38fc4d17fb77610
parent: 9510b4cae3b95ddea506206756b725a9c5c11148
author: Sigrid Solveig Haflínudóttir <sigrid@ftrv.se>
date: Mon Jan 1 22:08:22 EST 2024
spans rewrite WIP
--- a/Makefile
+++ b/Makefile
@@ -82,8 +82,6 @@
seprint.o\
snd_openal.o\
softfloat.o\
- span.o\
- span_alpha.o\
sv_main.o\
sv_move.o\
sv_phys.o\
--- a/d_alpha.c
+++ b/d_alpha.c
@@ -1,7 +1,7 @@
#include "quakedef.h"
pixel_t
-blendalpha(pixel_t ca, pixel_t cb, int alpha, uzint izi)
+blendalpha(pixel_t ca, pixel_t cb, int alpha)
{int a, b, c;
@@ -9,7 +9,6 @@
alpha = (ca >> 24)*alpha >> 8;
if(currententity != nil && currententity->effects & EF_ADDITIVE){- ca = R_BlendFog(ca, izi);
a = (alpha*((ca>> 0)&0xff) + 255*((cb>> 0)&0xff))>> 8;
b = (alpha*((ca>> 8)&0xff) + 255*((cb>> 8)&0xff))>> 8;
c = (alpha*((ca>>16)&0xff) + 255*((cb>>16)&0xff))>> 8;
@@ -16,13 +15,11 @@
return (cb & 0xff000000) | min(a, 255) | min(b, 255)<<8 | min(c, 255)<<16;
}
- return R_BlendFog(
+ return
(cb & 0xff000000) |
((alpha*((ca>> 0)&0xff) + (255-alpha)*((cb>> 0)&0xff))>> 8) << 0 |
((alpha*((ca>> 8)&0xff) + (255-alpha)*((cb>> 8)&0xff))>> 8) << 8 |
- ((alpha*((ca>>16)&0xff) + (255-alpha)*((cb>>16)&0xff))>> 8) << 16,
- izi
- );
+ ((alpha*((ca>>16)&0xff) + (255-alpha)*((cb>>16)&0xff))>> 8) << 16;
}
float
--- a/d_edge.c
+++ b/d_edge.c
@@ -1,7 +1,5 @@
#include "quakedef.h"
-static int miplevel;
-
float scale_for_mip;
// FIXME: should go away
@@ -25,16 +23,18 @@
return max(d_minmip, lmiplevel);
}
-// FIXME: clean this up
static void
D_DrawSolidSurface(surf_t *surf, pixel_t color)
{espan_t *span;
pixel_t *pdest;
+ uzint *pz;
int u, u2;
for(span = surf->spans; span; span=span->pnext){- pdest = dvars.viewbuffer + dvars.width*span->v;
+ pdest = dvars.viewbuffer + span->v*dvars.width;
+ pz = dvars.zbuffer + span->v*dvars.width;
+ memset(pz, 0xfe, span->count*sizeof(*pz));
u2 = span->u + span->count - 1;
for(u = span->u; u <= u2; u++)
pdest[u] = color;
@@ -43,7 +43,7 @@
static void
-D_CalcGradients(msurface_t *pface, vec3_t transformed_modelorg)
+D_CalcGradients(int miplevel, msurface_t *pface, vec3_t transformed_modelorg)
{float mipscale;
vec3_t p_temp1, p_saxis, p_taxis;
@@ -81,6 +81,10 @@
dvars.bbextentt = ((pface->extents[1] << 16) >> miplevel) - 1;
}
+void dospan_turb(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, byte alpha, uzint *pz, int izi, int izistep);
+void dospan_alpha(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, byte alpha, uzint *pz, int izi, int izistep);
+void dospan(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, byte alpha, uzint *pz, int izi, int izistep);
+
void
D_DrawSurfaces (void)
{@@ -87,11 +91,12 @@
surf_t *s;
msurface_t *pface;
surfcache_t *pcurrentcache;
- vec3_t world_transformed_modelorg, local_modelorg, transformed_modelorg;
+ vec3_t local_modelorg, transformed_modelorg, world_transformed_modelorg;
+ int miplevel;
byte alpha;
bool blend;
- currententity = &cl_entities[0];
+ currententity = cl_entities;
TransformVector(modelorg, transformed_modelorg);
VectorCopy(transformed_modelorg, world_transformed_modelorg);
@@ -116,72 +121,39 @@
dvars.zistepv = s->d_zistepv;
dvars.ziorigin = s->d_ziorigin;
- if(s->insubmodel){- // FIXME: we don't want to do all this for every polygon!
- // TODO: store once at start of frame
- currententity = s->entity; //FIXME: make this passed in to
- // R_RotateBmodel()
+ if(s->insubmodel && s->entity != currententity){+ currententity = s->entity;
VectorSubtract(r_origin, currententity->origin, local_modelorg);
TransformVector(local_modelorg, transformed_modelorg);
-
- R_RotateBmodel(s->entity); // FIXME: don't mess with the frustum,
- // make entity passed in
+ R_RotateBmodel(currententity);
}
+ pface = s->data;
if(s->flags & SURF_DRAWSKY){D_DrawSkyScans8(s->spans);
- dvars.ziorigin = -0.8;
- D_DrawZSpans(s->spans);
}else if(s->flags & SURF_DRAWBACKGROUND){- // set up a gradient for the background surface that places it
- // effectively at infinity distance from the viewpoint
- dvars.zistepu = 0;
- dvars.zistepv = 0;
- dvars.ziorigin = -0.9;
-
D_DrawSolidSurface(s, q1pal[(int)r_clearcolor.value & 0xFF]);
- D_DrawZSpans(s->spans);
}else if(s->flags & SURF_DRAWTURB){- pface = s->data;
- miplevel = 0;
- dvars.cacheblock = pface->texinfo->texture->pixels + pface->texinfo->texture->offsets[0];
- dvars.cachewidth = 64;
-
- D_CalcGradients (pface, transformed_modelorg);
- Turbulent8 (s->spans, alpha);
- if(!blend)
- D_DrawZSpans (s->spans);
+ D_CalcGradients(0, pface, transformed_modelorg);
+ D_DrawSpans16(s->spans, pface->texinfo->texture->pixels, 64, alpha, SPAN_TURB);
}else{- pface = s->data;
miplevel = D_MipLevelForScale(s->nearzi * scale_for_mip * pface->texinfo->mipadjust);
if(s->flags & SURF_FENCE)
miplevel = max(miplevel-1, 0);
- // FIXME: make this passed in to D_CacheSurface
pcurrentcache = D_CacheSurface(pface, miplevel);
-
- dvars.cacheblock = pcurrentcache->pixels;
- dvars.cachewidth = pcurrentcache->width;
-
- D_CalcGradients(pface, transformed_modelorg);
-
- D_DrawSpans16(s->spans, blend, alpha);
- if(!blend)
- D_DrawZSpans(s->spans);
+ D_CalcGradients(miplevel, pface, transformed_modelorg);
+ D_DrawSpans16(s->spans, pcurrentcache->pixels, pcurrentcache->width, alpha,
+ (alpha == 255 && s->flags & SURF_FENCE) ? SPAN_FENCE : (blend ? SPAN_BLEND : SPAN_SOLID)
+ );
}
-
- if(s->insubmodel){- // restore the old drawing state
- // FIXME: we don't want to do this every time!
- // TODO: speed up
- currententity = &cl_entities[0];
- VectorCopy(world_transformed_modelorg, transformed_modelorg);
- VectorCopy(base_vpn, vpn);
- VectorCopy(base_vup, vup);
- VectorCopy(base_vright, vright);
- VectorCopy(base_modelorg, modelorg);
- R_TransformFrustum();
- }
}
-}
+ currententity = cl_entities;
+ VectorCopy(world_transformed_modelorg, transformed_modelorg);
+ VectorCopy(base_vpn, vpn);
+ VectorCopy(base_vup, vup);
+ VectorCopy(base_vright, vright);
+ VectorCopy(base_modelorg, modelorg);
+ R_TransformFrustum();
+}
--- a/d_init.c
+++ b/d_init.c
@@ -8,6 +8,8 @@
int d_minmip;
float d_scalemip[MIPLEVELS-1];
+extern int *r_turb_turb;
+
static float basemip[MIPLEVELS-1] = {1.0, 0.5*0.8, 0.25*0.8};void
@@ -24,6 +26,8 @@
D_SetupFrame(void)
{int i;
+
+ r_turb_turb = sintable + ((int)(cl.time*SPEED)&(CYCLE-1));
dvars.viewbuffer = r_dowarp ? r_warpbuffer : vid.buffer;
dvars.width = vid.width;
--- a/d_local.h
+++ b/d_local.h
@@ -58,8 +58,14 @@
extern dvars_t dvars;
extern skyvars_t skyvars;
-void D_DrawSpans16 (espan_t *pspans, bool blend, byte alpha);
-void D_DrawZSpans (espan_t *pspans);
+enum {+ SPAN_BLEND,
+ SPAN_FENCE,
+ SPAN_SOLID,
+ SPAN_TURB,
+};
+
+void D_DrawSpans16(espan_t *pspan, pixel_t *pbase, int width, byte alpha, int spanfunc);
void Turbulent8 (espan_t *pspan, byte alpha);
void D_DrawSkyScans8 (espan_t *pspan);
@@ -77,5 +83,5 @@
extern int d_minmip;
extern float d_scalemip[3];
-pixel_t blendalpha(pixel_t ca, pixel_t cb, int alpha, uzint izi);
+pixel_t blendalpha(pixel_t ca, pixel_t cb, int alpha);
float alphafor(int flags);
--- a/d_polyse.c
+++ b/d_polyse.c
@@ -123,7 +123,7 @@
pixel_t p = addlight(skintable[fv->t >> 16][fv->s >> 16], fv->l[0], fv->l[1], fv->l[2]);
int n = d_scantable[fv->v] + fv->u;
if(r_drawflags & DRAW_BLEND){- dvars.viewbuffer[n] = blendalpha(p, dvars.viewbuffer[n], alpha, z);
+ dvars.viewbuffer[n] = blendalpha(p, dvars.viewbuffer[n], alpha);
}else{dvars.viewbuffer[n] = p;
*zbuf = z;
@@ -311,7 +311,7 @@
pixel_t p = addlight(skintable[new.t >> 16][new.s >> 16], l[0], l[1], l[2]);
int n = d_scantable[new.v] + new.u;
if(r_drawflags & DRAW_BLEND){- dvars.viewbuffer[n] = blendalpha(p, dvars.viewbuffer[n], alpha, z);
+ dvars.viewbuffer[n] = blendalpha(p, dvars.viewbuffer[n], alpha);
}else{dvars.viewbuffer[n] = p;
*zbuf = z;
@@ -555,8 +555,7 @@
*lpdest = blendalpha(
p,
*lpdest,
- alpha,
- lzi
+ alpha
);
}else{*lpdest = p;
--- a/d_scan.c
+++ b/d_scan.c
@@ -1,10 +1,7 @@
#include "quakedef.h"
+#include "r_fog.h"
-static pixel_t *r_turb_pbase, *r_turb_pdest;
-static fixed16_t r_turb_s, r_turb_t, r_turb_sstep, r_turb_tstep;
-static int *r_turb_turb;
-static int r_turb_spancount;
-static uzint *r_turb_z;
+int *r_turb_turb;
/*
=============
@@ -16,12 +13,11 @@
*/
void D_WarpScreen (void)
{- int w, h, u, v, *turb, *col;
- pixel_t *dest;
- pixel_t **row;
- float wratio, hratio;
- static pixel_t *rowptr[MAXHEIGHT+(AMP2*2)];
- static int column[MAXWIDTH+(AMP2*2)];
+ static pixel_t *rowptr[MAXHEIGHT+(AMP2*2)];
+ static int column[MAXWIDTH+(AMP2*2)];
+ int w, h, u, v, *turb, *col;
+ pixel_t *dest, **row;
+ float wratio, hratio;
w = r_refdef.vrect.width;
h = r_refdef.vrect.height;
@@ -51,142 +47,178 @@
}
}
-/*
-=============
-D_DrawTurbulent8Span
-=============
-*/
static inline void
-D_DrawTurbulent8Span (int izi, byte alpha)
+dospan_solid(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, uzint *pz, uzint izi, int izistep)
{- int sturb, tturb;
+ pixel_t pix;
+ do{+ *pz++ = izi;
+ pix = pbase[(s >> 16) + (t >> 16) * width];
+ s += sstep;
+ t += tstep;
+ izi += izistep;
+ *pdest++ = pix;
+ }while(--spancount);
+}
+static inline void
+dospan_solid_f1(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, uzint *pz, uzint izi, int izistep, fog_t *fog)
+{+ pixel_t pix;
do{- sturb = ((r_turb_s + r_turb_turb[(r_turb_t>>16)&(CYCLE-1)])>>16)&63;
- tturb = ((r_turb_t + r_turb_turb[(r_turb_s>>16)&(CYCLE-1)])>>16)&63;
- if(*r_turb_z <= izi || (r_drawflags & DRAW_BLEND) == 0)
- *r_turb_pdest = blendalpha(*(r_turb_pbase + (tturb<<6) + sturb), *r_turb_pdest, alpha, izi);
- r_turb_s += r_turb_sstep;
- r_turb_t += r_turb_tstep;
- r_turb_pdest++;
- r_turb_z++;
- }while(--r_turb_spancount > 0);
+ *pz++ = izi;
+ izi += izistep;
+ pix = pbase[(s >> 16) + (t >> 16) * width];
+ s += sstep;
+ t += tstep;
+ *pdest++ = blendfog(pix, *fog);
+ fogstep(*fog);
+ }while(--spancount);
}
-
-void
-Turbulent8(espan_t *pspan, byte alpha)
+static inline void
+dospan_blend(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, byte alpha, uzint *pz, uzint izi, int izistep)
{- int count, spancountminus1;
- fixed16_t snext, tnext;
- float sdivz, tdivz, zi, z, du, dv;
- float sdivz16stepu, tdivz16stepu, zi16stepu;
+ pixel_t pix;
- r_turb_turb = sintable + ((int)(cl.time*SPEED)&(CYCLE-1));
+ do{+ pix = pbase[(s >> 16) + (t >> 16) * width];
+ s += sstep;
+ t += tstep;
+ if(opaque(pix) && *pz <= izi)
+ *pdest = blendalpha(pix, *pdest, alpha);
+ izi += izistep;
+ pdest++;
+ pz++;
+ }while(--spancount);
+}
- r_turb_sstep = 0; // keep compiler happy
- r_turb_tstep = 0; // ditto
+static inline void
+dospan_blend_f1(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, byte alpha, uzint *pz, uzint izi, int izistep, fog_t *fog)
+{+ pixel_t pix;
- r_turb_pbase = dvars.cacheblock;
+ do{+ pix = pbase[(s >> 16) + (t >> 16) * width];
+ s += sstep;
+ t += tstep;
+ if(opaque(pix) && *pz <= izi)
+ *pdest = blendalpha(blendfog(pix, *fog), *pdest, alpha);
+ izi += izistep;
+ pdest++;
+ pz++;
+ fogstep(*fog);
+ }while(--spancount);
+}
- sdivz16stepu = dvars.sdivzstepu * 16;
- tdivz16stepu = dvars.tdivzstepu * 16;
- zi16stepu = dvars.zistepu * 16;
+static inline void
+dospan_fence(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, uzint *pz, uzint izi, int izistep)
+{+ pixel_t pix;
do{- r_turb_pdest = dvars.viewbuffer + pspan->v*dvars.width + pspan->u;
- r_turb_z = dvars.zbuffer + pspan->v*dvars.width + pspan->u;
- zi = dvars.ziorigin + pspan->v*dvars.zistepv + pspan->u*dvars.zistepu;
+ pix = pbase[(s >> 16) + (t >> 16) * width];
+ s += sstep;
+ t += tstep;
+ if(opaque(pix) && *pz <= izi){+ *pdest = pix;
+ *pz = izi;
+ }
+ izi += izistep;
+ pdest++;
+ pz++;
+ }while(--spancount);
+}
- count = pspan->count;
+static inline void
+dospan_fence_f1(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int width, uzint *pz, uzint izi, int izistep, fog_t *fog)
+{+ pixel_t pix;
- // calculate the initial s/z, t/z, 1/z, s, and t and clamp
- du = pspan->u;
- dv = pspan->v;
+ do{+ pix = pbase[(s >> 16) + (t >> 16) * width];
+ s += sstep;
+ t += tstep;
+ if(opaque(pix) && *pz <= izi){+ *pdest = blendfog(pix, *fog);
+ *pz = izi;
+ }
+ izi += izistep;
+ pdest++;
+ pz++;
+ fogstep(*fog);
+ }while(--spancount);
+}
- sdivz = dvars.sdivzorigin + dv*dvars.sdivzstepv + du*dvars.sdivzstepu;
- tdivz = dvars.tdivzorigin + dv*dvars.tdivzstepv + du*dvars.tdivzstepu;
- z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
+static void
+dospan_turb(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, byte alpha, uzint *pz, uzint izi, int izistep)
+{+ int sturb, tturb;
+ bool noblend;
- r_turb_s = (int)(sdivz * z) + dvars.sadjust;
- r_turb_s = clamp(r_turb_s, 0, dvars.bbextents);
+ noblend = (r_drawflags & DRAW_BLEND) == 0;
+ s &= (CYCLE<<16)-1;
+ t &= (CYCLE<<16)-1;
- r_turb_t = (int)(tdivz * z) + dvars.tadjust;
- r_turb_t = clamp(r_turb_t, 0, dvars.bbextentt);
+ do{+ if(noblend || *pz <= izi){+ sturb = ((s + r_turb_turb[(t>>16)&(CYCLE-1)])>>16)&63;
+ tturb = ((t + r_turb_turb[(s>>16)&(CYCLE-1)])>>16)&63;
+ *pdest = blendalpha(*(pbase + (tturb<<6) + sturb), *pdest, alpha);
+ *pz = izi; // FIXME(sigrid): can always update this one?
+ }
+ s += sstep;
+ t += tstep;
+ izi += izistep;
+ pdest++;
+ pz++;
+ }while(--spancount > 0);
- do{- // calculate s and t at the far end of the span
- r_turb_spancount = min(count, 16);
- count -= r_turb_spancount;
+}
- if(count){- // calculate s/z, t/z, zi->fixed s and t at far end of span,
- // calculate s and t steps across span by shifting
- sdivz += sdivz16stepu;
- tdivz += tdivz16stepu;
- zi += zi16stepu;
- z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
+static void
+dospan_turb_f1(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, byte alpha, uzint *pz, uzint izi, int izistep, fog_t *fog)
+{+ int sturb, tturb;
+ bool noblend;
- snext = (int)(sdivz * z) + dvars.sadjust;
- // prevent round-off error on <0 steps from causing overstepping & running off the edge of the texture
- snext = clamp(snext, 16, dvars.bbextents);
+ noblend = (r_drawflags & DRAW_BLEND) == 0;
+ s &= (CYCLE<<16)-1;
+ t &= (CYCLE<<16)-1;
- tnext = (int)(tdivz * z) + dvars.tadjust;
- tnext = clamp(tnext, 16, dvars.bbextentt); // guard against round-off error on <0 steps
+ do{+ if(noblend || *pz <= izi){+ sturb = ((s + r_turb_turb[(t>>16)&(CYCLE-1)])>>16)&63;
+ tturb = ((t + r_turb_turb[(s>>16)&(CYCLE-1)])>>16)&63;
+ *pdest = blendalpha(blendfog(*(pbase + (tturb<<6) + sturb), *fog), *pdest, alpha);
+ *pz = izi; // FIXME(sigrid): can always update this one?
+ }
+ s += sstep;
+ t += tstep;
+ izi += izistep;
+ pdest++;
+ pz++;
+ fogstep(*fog);
+ }while(--spancount > 0);
- r_turb_sstep = (snext - r_turb_s) >> 4;
- r_turb_tstep = (tnext - r_turb_t) >> 4;
- }else{- // calculate s/z, t/z, zi->fixed s and t at last pixel in span (so
- // can't step off polygon), clamp, calculate s and t steps across
- // span by division, biasing steps low so we don't run off the
- // texture
- spancountminus1 = r_turb_spancount - 1;
- sdivz += dvars.sdivzstepu * spancountminus1;
- tdivz += dvars.tdivzstepu * spancountminus1;
- zi += dvars.zistepu * spancountminus1;
- z = (float)0x10000 / zi; // prescale to 16.16 fixed-point
- snext = (int)(sdivz * z) + dvars.sadjust;
- // prevent round-off error on <0 steps from causing overstepping & running off the edge of the texture
- snext = clamp(snext, 16, dvars.bbextents);
-
- tnext = (int)(tdivz * z) + dvars.tadjust;
- tnext = clamp(tnext, 16, dvars.bbextentt); // guard against round-off error on <0 steps
-
- if(r_turb_spancount > 1){- r_turb_sstep = (snext - r_turb_s) / spancountminus1;
- r_turb_tstep = (tnext - r_turb_t) / spancountminus1;
- }
- }
-
- r_turb_s = r_turb_s & ((CYCLE<<16)-1);
- r_turb_t = r_turb_t & ((CYCLE<<16)-1);
-
- D_DrawTurbulent8Span((int)(zi * 0x8000 * 0x10000), alpha);
-
- r_turb_s = snext;
- r_turb_t = tnext;
-
- }while(count > 0);
-
- }while((pspan = pspan->pnext) != nil);
}
void
-D_DrawSpans16(espan_t *pspan, bool blend, byte alpha) //qbism- up it from 8 to 16
+D_DrawSpans16(espan_t *pspan, pixel_t *pbase, int width, byte alpha, int spanfunc)
{int count, spancount, izistep, spancountminus1;
- pixel_t *pbase, *pdest;
- uzint *pz;
+ pixel_t *pdest;
+ uzint *pz, izi;
fixed16_t s, t, snext, tnext, sstep, tstep;
float sdivz, tdivz, zi, z, du, dv;
float sdivzstepu, tdivzstepu, zistepu;
+ fog_t fog;
+ bool fogged;
sstep = 0; // keep compiler happy
tstep = 0; // ditto
+ memset(&fog, 0, sizeof(fog));
- pbase = dvars.cacheblock;
-
sdivzstepu = dvars.sdivzstepu * 16;
tdivzstepu = dvars.tdivzstepu * 16;
zistepu = dvars.zistepu * 16;
@@ -196,7 +228,7 @@
pdest = dvars.viewbuffer + pspan->v*dvars.width + pspan->u;
pz = dvars.zbuffer + pspan->v*dvars.width + pspan->u;
zi = dvars.ziorigin + pspan->v*dvars.zistepv + pspan->u*dvars.zistepu;
-
+ izi = zi * 0x8000 * 0x10000;
count = pspan->count;
// calculate the initial s/z, t/z, 1/z, s, and t and clamp
@@ -223,7 +255,8 @@
// calculate s and t steps across span by shifting
sdivz += sdivzstepu;
tdivz += tdivzstepu;
- z = (float)0x10000 / (zi + zistepu); // prescale to 16.16 fixed-point
+ // prescale to 16.16 fixed-point
+ z = (float)0x10000 / (zi + zistepu);
snext = (int)(sdivz * z) + dvars.sadjust;
// prevent round-off error on <0 steps from
@@ -245,7 +278,8 @@
spancountminus1 = spancount - 1;
sdivz += dvars.sdivzstepu * spancountminus1;
tdivz += dvars.tdivzstepu * spancountminus1;
- z = (float)0x10000 / (zi + dvars.zistepu * spancountminus1); // prescale to 16.16 fixed-point
+ // prescale to 16.16 fixed-point
+ z = (float)0x10000 / (zi + dvars.zistepu * spancountminus1);
snext = (int)(sdivz * z) + dvars.sadjust;
// prevent round-off error on <0 steps from
// from causing overstepping & running off the
@@ -262,38 +296,45 @@
}
}
- void dospan(pixel_t *, pixel_t *, int, int, int, int, int, int);
- void dospan_alpha(pixel_t *, pixel_t *, int, int, int, int, int, int, byte, uzint *, int, int);
- if(blend)
- dospan_alpha(pdest, pbase, s, t, sstep, tstep, spancount, dvars.cachewidth, alpha, pz, (int)(zi * 0x8000 * 0x10000), izistep);
- else
- dospan(pdest, pbase, s, t, sstep, tstep, spancount, dvars.cachewidth);
+ fogged = isfogged() ? fogcalc(izi, izi + izistep*spancount, spancount, &fog) : false;
+ if(fogged){+ switch(spanfunc){+ case SPAN_SOLID:
+ dospan_solid_f1(pdest, pbase, s, t, sstep, tstep, spancount, width, pz, izi, izistep, &fog);
+ break;
+ case SPAN_TURB:
+ dospan_turb_f1(pdest, pbase, s, t, sstep, tstep, spancount, alpha, pz, izi, izistep, &fog);
+ break;
+ case SPAN_BLEND:
+ dospan_blend_f1(pdest, pbase, s, t, sstep, tstep, spancount, width, alpha, pz, izi, izistep, &fog);
+ break;
+ case SPAN_FENCE:
+ dospan_fence_f1(pdest, pbase, s, t, sstep, tstep, spancount, width, pz, izi, izistep, &fog);
+ break;
+ }
+ }else{+ switch(spanfunc){+ case SPAN_SOLID:
+ dospan_solid(pdest, pbase, s, t, sstep, tstep, spancount, width, pz, izi, izistep);
+ break;
+ case SPAN_TURB:
+ dospan_turb(pdest, pbase, s, t, sstep, tstep, spancount, alpha, pz, izi, izistep);
+ break;
+ case SPAN_BLEND:
+ dospan_blend(pdest, pbase, s, t, sstep, tstep, spancount, width, alpha, pz, izi, izistep);
+ break;
+ case SPAN_FENCE:
+ dospan_fence(pdest, pbase, s, t, sstep, tstep, spancount, width, pz, izi, izistep);
+ break;
+ }
+ }
+
pdest += spancount;
pz += spancount;
+ izi += izistep*spancount;
zi += zistepu;
s = snext;
t = tnext;
}while(count > 0);
- }while((pspan = pspan->pnext) != nil);
-}
-
-void
-D_DrawZSpans(espan_t *pspan)
-{- int count, izi, izistep;
- uzint *pz;
- float zi;
-
- izistep = dvars.zistepu * 0x8000 * 0x10000;
-
- do{- pz = dvars.zbuffer + pspan->v*dvars.width + pspan->u;
- zi = dvars.ziorigin + pspan->v*dvars.zistepv + pspan->u*dvars.zistepu;
- count = pspan->count;
- izi = (int)(zi * 0x8000 * 0x10000);
- do{- *pz++ = izi;
- izi += izistep;
- }while(--count > 0);
}while((pspan = pspan->pnext) != nil);
}
--- a/d_sky.c
+++ b/d_sky.c
@@ -39,9 +39,12 @@
void D_DrawSkyScans8 (espan_t *pspan)
{int count, spancount, u, v, spancountminus1;
- pixel_t *pdest, m;
+ pixel_t *pdest, pix;
+ uzint *pz;
fixed16_t s[2], t[2], snext[2], tnext[2], sstep[2], tstep[2];
float skydist;
+ bool fog;
+ int c0, c1, c2, inva;
if(skyvars.source[0] == nil || skyvars.source[1] == nil)
return;
@@ -49,11 +52,19 @@
sstep[0] = sstep[1] = 0; // keep compiler happy
tstep[0] = tstep[1] = 0; // ditto
skydist = skyvars.time*skyvars.speed; // TODO: add D_SetupFrame & set this there
+ if((fog = isskyfogged())){+ c0 = fogvars.skyc0;
+ c1 = fogvars.skyc1;
+ c2 = fogvars.skyc1;
+ inva = 255 - fogvars.sky;
+ }
do
{- pdest = dvars.viewbuffer + (dvars.width * pspan->v) + pspan->u;
+ pdest = dvars.viewbuffer + pspan->v*dvars.width + pspan->u;
count = pspan->count;
+ pz = dvars.zbuffer + pspan->v*dvars.width + pspan->u;
+ memset(pz, 0xff, count*sizeof(*pz));
// calculate the initial s & t
u = pspan->u;
@@ -62,15 +73,10 @@
do
{- if (count >= SKY_SPAN_MAX)
- spancount = SKY_SPAN_MAX;
- else
- spancount = count;
-
+ spancount = min(count, SKY_SPAN_MAX);
count -= spancount;
- if (count)
- {+ if(count){u += spancount;
// calculate s and t at far end of span,
@@ -81,9 +87,7 @@
tstep[0] = (tnext[0] - t[0]) >> SKY_SPAN_SHIFT;
sstep[1] = (snext[1] - s[1]) >> SKY_SPAN_SHIFT;
tstep[1] = (tnext[1] - t[1]) >> SKY_SPAN_SHIFT;
- }
- else
- {+ }else{// calculate s and t at last pixel in span,
// calculate s and t steps across span by division
spancountminus1 = (float)(spancount - 1);
@@ -100,14 +104,17 @@
}
}
- do
- {- m = skyvars.source[1][((t[1] & skyvars.tmask) >> skyvars.tshift) + ((s[1] & skyvars.smask) >> 16)];
- if(opaque(m))
- *pdest = m;
- else
- *pdest = skyvars.source[0][((t[0] & skyvars.tmask) >> skyvars.tshift) + ((s[0] & skyvars.smask) >> 16)];
- pdest++;
+ do{+ pix = skyvars.source[1][((t[1] & skyvars.tmask) >> skyvars.tshift) + ((s[1] & skyvars.smask) >> 16)];
+ if(!opaque(pix))
+ pix = skyvars.source[0][((t[0] & skyvars.tmask) >> skyvars.tshift) + ((s[0] & skyvars.smask) >> 16)];
+ if(fog){+ pix =
+ ((c0 + inva*((pix>> 0)&0xff)) >> 8) << 0 |
+ ((c1 + inva*((pix>> 8)&0xff)) >> 8) << 8 |
+ ((c2 + inva*((pix>>16)&0xff)) >> 8) << 16;
+ }
+ *pdest++ = pix;
s[0] += sstep[0];
t[0] += tstep[0];
s[1] += sstep[1];
--- a/d_sprite.c
+++ b/d_sprite.c
@@ -31,6 +31,11 @@
// we count on FP exceptions being turned off to avoid range problems
izistep = (int)(dvars.zistepu * 0x8000 * 0x10000);
+ if(pspan->v < 0){+ fprintf(stderr, "%d %d %d %p\n", dvars.width, pspan->v, pspan->u, dvars.zbuffer + dvars.width * pspan->v + pspan->u);
+ return;
+ }
+
do
{pdest = dvars.viewbuffer + dvars.width * pspan->v + pspan->u;
@@ -115,7 +120,7 @@
btemp = *(pbase + (s >> 16) + (t >> 16) * dvars.cachewidth);
if(opaque(btemp) && *pz <= izi){ if(r_drawflags & DRAW_BLEND){- *pdest = blendalpha(btemp, *pdest, alpha, izi);
+ *pdest = blendalpha(btemp, *pdest, alpha);
}else{*pz = izi;
*pdest = btemp;
--- a/mkfile
+++ b/mkfile
@@ -77,8 +77,6 @@
snd_mix.$O\
snd_plan9.$O\
softfloat.$O\
- span_alpha.$O\
- span`{test -f span_$objtype.s && echo -n _$objtype}.$O\sv_main.$O\
sv_move.$O\
sv_phys.$O\
--- a/r_fog.c
+++ b/r_fog.c
@@ -3,17 +3,20 @@
static cvar_t r_fog = {"r_fog", "1", true}; static cvar_t r_skyfog = {"r_skyfog", "0.5"};-static struct {- float density;
- byte c0, c1, c2, sky;
- bool allowed;
- int enabled;
-}r_fog_data;
+fogvars_t fogvars;
-enum {- Enfog = 1<<0,
- Enskyfog = 1<<1,
-};
+static void
+r_skyfog_cb(cvar_t *var)
+{+ if(var->value > 0.0)
+ fogvars.enabled |= Enskyfog;
+ else
+ fogvars.enabled &= ~Enskyfog;
+ fogvars.sky = 255 * clamp(var->value, 0.0, 1.0);
+ fogvars.skyc0 = fogvars.sky * fogvars.c0;
+ fogvars.skyc1 = fogvars.sky * fogvars.c1;
+ fogvars.skyc2 = fogvars.sky * fogvars.c2;
+}
static void
fog(void)
@@ -31,115 +34,50 @@
if(n == 2 && strncmp(s = Cmd_Argv(0), "gl_fog", 6) == 0 && s[6] != 'd'){ // Nehahrax = 255 * clamp(x, 0.0, 1.0);
if(s[6] == 'r')
- r_fog_data.c2 = x;
+ fogvars.c2 = x;
else if(s[6] == 'g')
- r_fog_data.c1 = x;
+ fogvars.c1 = x;
else if(s[6] == 'b')
- r_fog_data.c0 = x;
+ fogvars.c0 = x;
else if(s[6] == 'e'){- r_fog_data.enabled = x > 0 ? (Enfog | Enskyfog) : 0;
+ fogvars.enabled = x > 0 ? (Enfog | Enskyfog) : 0;
setcvar("r_skyfog", x > 0 ? "1" : "0");}
return;
}
- r_fog_data.density = clamp(x, 0.0, 1.0) * 0.016;
- r_fog_data.density *= r_fog_data.density;
+ fogvars.density = clamp(x, 0.0, 1.0) * 0.016;
+ fogvars.density *= fogvars.density;
if(n == 2)
break;
case 4:
x = atof(Cmd_Argv(i++));
- r_fog_data.c2 = 0xff * clamp(x, 0.0, 1.0);
+ fogvars.c2 = 0xff * clamp(x, 0.0, 1.0);
x = atof(Cmd_Argv(i++));
- r_fog_data.c1 = 0xff * clamp(x, 0.0, 1.0);
+ fogvars.c1 = 0xff * clamp(x, 0.0, 1.0);
x = atof(Cmd_Argv(i));
- r_fog_data.c0 = 0xff * clamp(x, 0.0, 1.0);
+ fogvars.c0 = 0xff * clamp(x, 0.0, 1.0);
+ r_skyfog_cb(&r_skyfog); /* recalculate sky fog */
break;
}
- if(r_fog_data.density > 0.0)
- r_fog_data.enabled |= Enfog;
+ if(fogvars.density > 0.0)
+ fogvars.enabled |= Enfog;
else
- r_fog_data.enabled &= ~Enfog;
+ fogvars.enabled &= ~Enfog;
}
void
R_ResetFog(void)
{- r_fog_data.density = 0;
- r_fog_data.c0 = r_fog_data.c1 = r_fog_data.c2 = 0x80;
- r_fog_data.enabled = 0;
- r_fog_data.allowed = r_fog.value > 0.0;
+ memset(&fogvars, 0, sizeof(fogvars));
+ fogvars.c0 = fogvars.c1 = fogvars.c2 = 0x80;
+ fogvars.allowed = r_fog.value > 0.0;
setcvar("r_skyfog", "0");}
-static inline pixel_t
-blend_fog(pixel_t pix, uzint z)
-{- byte a;
- float d;
-
- if(z > 65536){- d = 65536ULL*65536ULL / (u64int)z;
- if((pix & ~0xffffff) == 0)
- d /= 1.5;
- d = 1.0 - exp2(-r_fog_data.density * d*d);
- a = 255*d;
- }else if(z < 0){- a = r_fog_data.sky;
- }else{- a = 0;
- }
-
- if(a == 0)
- return pix;
-
- return
- ((a*r_fog_data.c0 + (255-a)*((pix>> 0)&0xff)) >> 8) << 0 |
- ((a*r_fog_data.c1 + (255-a)*((pix>> 8)&0xff)) >> 8) << 8 |
- ((a*r_fog_data.c2 + (255-a)*((pix>>16)&0xff)) >> 8) << 16;
-}
-
-pixel_t
-R_BlendFog(pixel_t pix, uzint z)
-{- if(r_fog_data.enabled && r_fog_data.allowed)
- pix = blend_fog(pix, z);
- return pix;
-}
-
-void
-R_DrawFog(void)
-{- pixel_t *pix;
- int i, x, y;
- uzint *z;
-
- if(!r_fog_data.enabled || !r_fog_data.allowed)
- return;
-
- /* FIXME(sigrid): this is super slow */
- for(y = r_refdef.vrect.y; y < r_refdef.vrectbottom; y++){- i = y * vid.width + r_refdef.vrect.x;
- pix = vid.buffer + i;
- z = dvars.zbuffer + i;
- for(x = r_refdef.vrect.x; x < r_refdef.vrectright; x++, i++, pix++, z++)
- *pix = blend_fog(*pix, *z);
- }
-}
-
static void
r_fog_cb(cvar_t *var)
{- r_fog_data.allowed = var->value > 0.0;
-}
-
-static void
-r_skyfog_cb(cvar_t *var)
-{- if(var->value > 0.0)
- r_fog_data.enabled |= Enskyfog;
- else
- r_fog_data.enabled &= ~Enskyfog;
- r_fog_data.sky = 255 * clamp(var->value, 0.0, 1.0);
+ fogvars.allowed = var->value > 0.0;
}
void
--- /dev/null
+++ b/r_fog.h
@@ -1,0 +1,57 @@
+#define fogstep(f) \
+ do{ \+ (f).v[0] += (f).d[0]; \
+ (f).v[1] += (f).d[1]; \
+ (f).v[2] += (f).d[2]; \
+ (f).v[3] += (f).d[3]; \
+ }while(0)
+
+#define fogshift 8
+
+static inline byte
+z2foga(uzint z)
+{+ float d;
+
+ if(z <= 65536)
+ return 0;
+ d = 65536ULL*65536ULL / (u64int)z;
+ d = 1.0 - exp2(-fogvars.density * d*d);
+ return 255*d;
+}
+
+static inline pixel_t
+blendfog(pixel_t pix, fog_t fog)
+{+ byte inva = 0xff - (fog.v[3]>>fogshift);
+ return
+ ((fog.v[0] + ((inva*((pix>> 0)&0xff))<<fogshift)) >> (8 + fogshift)) << 0 |
+ ((fog.v[1] + ((inva*((pix>> 8)&0xff))<<fogshift)) >> (8 + fogshift)) << 8 |
+ ((fog.v[2] + ((inva*((pix>>16)&0xff))<<fogshift)) >> (8 + fogshift)) << 16;
+}
+
+static inline bool
+fogcalc(uzint zi0, uzint zi1, int cnt, fog_t *f)
+{+ int end[3], v, e;
+
+ if((v = z2foga(zi0)) == 0 || (e = z2foga(zi1)) == 0)
+ return false;
+
+ v <<= fogshift;
+ e <<= fogshift;
+
+ end[0] = e * fogvars.c0;
+ end[1] = e * fogvars.c1;
+ end[2] = e * fogvars.c2;
+ f->v[0] = v * fogvars.c0;
+ f->v[1] = v * fogvars.c1;
+ f->v[2] = v * fogvars.c2;
+ f->v[3] = v;
+ f->d[0] = (end[0] - f->v[0])/cnt;
+ f->d[1] = (end[1] - f->v[1])/cnt;
+ f->d[2] = (end[2] - f->v[2])/cnt;
+ f->d[3] = (e - v)/cnt;
+
+ return true;
+}
--- a/r_local.h
+++ b/r_local.h
@@ -102,8 +102,6 @@
extern int r_drawflags;
void R_ResetFog(void);
-pixel_t R_BlendFog(pixel_t pix, uzint z);
-void R_DrawFog(void);
void R_InitFog(void);
//
--- a/r_main.c
+++ b/r_main.c
@@ -728,8 +728,6 @@
if (r_dowarp)
D_WarpScreen ();
- R_DrawFog();
-
V_SetContentsColor (r_viewleaf->contents);
if (r_reportsurfout.value && r_outofsurfaces)
--- a/r_shared.h
+++ b/r_shared.h
@@ -1,6 +1,34 @@
// r_shared.h: general refresh-related stuff shared between the refresh and the
// driver
+typedef s32int uzint;
+
+enum {+ Enfog = 1<<0,
+ Enskyfog = 1<<1,
+};
+
+typedef struct fog_t fog_t;
+typedef struct fogvars_t fogvars_t;
+
+struct fog_t {+ int v[4];
+ int d[4];
+};
+
+struct fogvars_t {+ float density;
+ byte c0, c1, c2, sky;
+ bool allowed;
+ int enabled;
+ int skyc0, skyc1, skyc2;
+};
+
+extern fogvars_t fogvars;
+
+#define isfogged() (fogvars.allowed && (fogvars.enabled & Enfog) != 0)
+#define isskyfogged() (fogvars.sky != 0 && fogvars.allowed && (fogvars.enabled & Enskyfog) != 0)
+
// FIXME: clean up and move into d_iface.h
#define MAXVERTS 16 // max points in a surface polygon
@@ -12,8 +40,6 @@
#define MAXDIMENSION ((MAXHEIGHT > MAXWIDTH) ? MAXHEIGHT : MAXWIDTH)
#define SIN_BUFFER_SIZE (MAXDIMENSION+CYCLE)
-
-typedef s32int uzint;
//===================================================================
--- a/span.c
+++ /dev/null
@@ -1,11 +1,0 @@
-#include "quakedef.h"
-
-void
-dospan(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int cachewidth)
-{- do{- *pdest++ = pbase[(s >> 16) + (t >> 16) * cachewidth];
- s += sstep;
- t += tstep;
- }while(--spancount);
-}
--- a/span_alpha.c
+++ /dev/null
@@ -1,33 +1,0 @@
-#include "quakedef.h"
-
-void
-dospan_alpha(pixel_t *pdest, pixel_t *pbase, int s, int t, int sstep, int tstep, int spancount, int cachewidth, u8int alpha, uzint *pz, int izi, int izistep)
-{- pixel_t pix;
-
- if(alpha != 255){- do{- pix = pbase[(s >> 16) + (t >> 16) * cachewidth];
- if(opaque(pix) && *pz <= izi)
- *pdest = blendalpha(pix, *pdest, alpha, izi);
- pdest++;
- pz++;
- izi += izistep;
- s += sstep;
- t += tstep;
- }while(--spancount);
- }else{- do{- pix = pbase[(s >> 16) + (t >> 16) * cachewidth];
- if(opaque(pix) && *pz <= izi){- *pdest = pix;
- *pz = izi;
- }
- pdest++;
- pz++;
- izi += izistep;
- s += sstep;
- t += tstep;
- }while(--spancount);
- }
-}
--
⑨