shithub: qk1

ref: 57bae65b26afd0c01b4c65b3d7538cc96ef80ae8
dir: /posix/d_scan.h/

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static inline void
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)
{
	if(((t + tstep*spancount) >> 16) == (t >> 16)){
		pbase += (t >> 16) * width;
		do{
			*pdest++ = pbase[s >> 16];
			*pz++ = izi;
			s += sstep;
			izi += izistep;
		}while(--spancount);
	}else if(((s + sstep*spancount) >> 16) == (s >> 16)){
		pbase += s >> 16;
		do{
			*pdest++ = pbase[(t >> 16) * width];
			*pz++ = izi;
			t += tstep;
			izi += izistep;
		}while(--spancount);
	}else{
		do{
			*pdest++ = pbase[(s >> 16) + (t >> 16) * width];
			*pz++ = izi;
			s += sstep;
			t += tstep;
			izi += izistep;
		}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)
{
	if(((t + tstep*spancount) >> 16) == (t >> 16)){
		pbase += (t >> 16) * width;
		do{
			*pz++ = izi;
			izi += izistep;
			*pdest++ = blendfog(pbase[s >> 16], *fog);
			fogstep(*fog);
			s += sstep;
		}while(--spancount);
	}else if(((s + sstep*spancount) >> 16) == (s >> 16)){
		pbase += s >> 16;
		do{
			*pz++ = izi;
			izi += izistep;
			*pdest++ = blendfog(pbase[(t >> 16) * width], *fog);
			fogstep(*fog);
			t += tstep;
		}while(--spancount);
	}else{
		do{
			*pz++ = izi;
			izi += izistep;
			*pdest++ = blendfog(pbase[(s >> 16) + (t >> 16) * width], *fog);
			fogstep(*fog);
			s += sstep;
			t += tstep;
		}while(--spancount);
	}
}

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)
{
	pixel_t pix;

	if(((t + tstep*spancount) >> 16) == (t >> 16)){
		pbase += (t >> 16) * width;
		do{
			pix = pbase[s >> 16];
			s += sstep;
			if(opaque(pix) && *pz <= izi)
				*pdest = blendalpha(pix, *pdest, alpha);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else if(((s + sstep*spancount) >> 16) == (s >> 16)){
		pbase += s >> 16;
		do{
			pix = pbase[(t >> 16) * width];
			t += tstep;
			if(opaque(pix) && *pz <= izi)
				*pdest = blendalpha(pix, *pdest, alpha);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else{
		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);
	}
}

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;

	if(((t + tstep*spancount) >> 16) == (t >> 16)){
		pbase += (t >> 16) * width;
		do{
			pix = pbase[s >> 16];
			s += sstep;
			if(opaque(pix) && *pz <= izi)
				*pdest = blendalpha(0xff<<24 | blendfog(pix, *fog), *pdest, alpha);
			fogstep(*fog);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else if(((s + sstep*spancount) >> 16) == (s >> 16)){
		pbase += s >> 16;
		do{
			pix = pbase[(t >> 16) * width];
			t += tstep;
			if(opaque(pix) && *pz <= izi)
				*pdest = blendalpha(0xff<<24 | blendfog(pix, *fog), *pdest, alpha);
			fogstep(*fog);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else{
		do{
			pix = pbase[(s >> 16) + (t >> 16) * width];
			s += sstep;
			t += tstep;
			if(opaque(pix) && *pz <= izi)
				*pdest = blendalpha(0xff<<24 | blendfog(pix, *fog), *pdest, alpha);
			fogstep(*fog);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}
}

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;

	if(((t + tstep*spancount) >> 16) == (t >> 16)){
		pbase += (t >> 16) * width;
		do{
			pix = pbase[s >> 16];
			s += sstep;
			if(opaque(pix) && *pz <= izi){
				*pdest = pix;
				*pz = izi;
			}
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else if(((s + sstep*spancount) >> 16) == (s >> 16)){
		pbase += s >> 16;
		do{
			pix = pbase[(t >> 16) * width];
			t += tstep;
			if(opaque(pix) && *pz <= izi){
				*pdest = pix;
				*pz = izi;
			}
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else{
		do{
			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);
	}
}

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;

	if(((t + tstep*spancount) >> 16) == (t >> 16)){
		pbase += (t >> 16) * width;
		do{
			pix = pbase[s >> 16];
			s += sstep;
			if(opaque(pix) && *pz <= izi){
				*pdest = blendfog(pix, *fog);
				*pz = izi;
			}
			fogstep(*fog);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else if(((s + sstep*spancount) >> 16) == (s >> 16)){
		pbase += s >> 16;
		do{
			pix = pbase[(t >> 16) * width];
			t += tstep;
			if(opaque(pix) && *pz <= izi){
				*pdest = blendfog(pix, *fog);
				*pz = izi;
			}
			fogstep(*fog);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}else{
		do{
			pix = pbase[(s >> 16) + (t >> 16) * width];
			s += sstep;
			t += tstep;
			if(opaque(pix) && *pz <= izi){
				*pdest = blendfog(pix, *fog);
				*pz = izi;
			}
			fogstep(*fog);
			izi += izistep;
			pdest++;
			pz++;
		}while(--spancount);
	}
}

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;

	noblend = (r_drawflags & DRAW_BLEND) == 0;
	s &= (CYCLE<<16)-1;
	t &= (CYCLE<<16)-1;

	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);
			if(noblend)
				*pz = izi;
		}
		s += sstep;
		t += tstep;
		izi += izistep;
		pdest++;
		pz++;
	}while(--spancount > 0);
}

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;

	noblend = (r_drawflags & DRAW_BLEND) == 0;
	s &= (CYCLE<<16)-1;
	t &= (CYCLE<<16)-1;

	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(0xff<<24 | blendfog(*(pbase + (tturb<<6) + sturb), *fog), *pdest, alpha);
			if(noblend)
				*pz = izi;
		}
		s += sstep;
		t += tstep;
		izi += izistep;
		pdest++;
		pz++;
		fogstep(*fog);
	}while(--spancount > 0);
}