ref: a6e0affe834cf1fcbaad864506f2647566890fd2
dir: /posix/d_scan.h/
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);
}