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engine.c: Rewrite tslopevlin (translucent slope vline texmapping) for clarity.

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git-svn-id: https://svn.eduke32.com/eduke32@2348 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2012-02-16 19:24:59 +00:00
parent c900e4ef87
commit 0538c70242
1 changed files with 7 additions and 8 deletions
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15
polymer/eduke32/build/src/engine.c
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@ -4027,30 +4027,29 @@ static void setupslopevlin_alsotrans(int32_t logylogx, intptr_t bufplc, int32_t
ggpal = palookup[globalpal] + (getpalookup(0,globalshade)<<8);
}
static void tslopevlin(intptr_t p, int32_t i, intptr_t slopaloffs, int32_t cnt, int32_t bx, int32_t by)
static void tslopevlin(uint8_t *p, int32_t i, const intptr_t *slopalptr, int32_t cnt, int32_t bx, int32_t by)
{
intptr_t *slopalptr;
int32_t bz, bzinc;
uint32_t u, v;
char ch;
uint8_t ch;
bz = asm3; bzinc = (asm1>>3);
slopalptr = (intptr_t *)slopaloffs;
for (; cnt>0; cnt--)
{
i = krecipasm(bz>>6); bz += bzinc;
u = bx+globalx3*i;
v = by+globaly3*i;
ch = *(char *)(slopalptr[0] + ggbuf[((u>>(32-gglogx))<<gglogy)+(v>>(32-gglogy))]);
ch = *(uint8_t *)(slopalptr[0] + ggbuf[((u>>(32-gglogx))<<gglogy)+(v>>(32-gglogy))]);
if (globalorientation&128)
{
if (ch != 255) *((char *)p) = transluc[*((char *)p)+(ggpal[ch]<<8)];
if (ch != 255) *p = transluc[*p+(ggpal[ch]<<8)];
}
else
{
if (ch != 255) *((char *)p) = transluc[(*((char *)p)<<8)+ggpal[ch]];
if (ch != 255) *p = transluc[(*p<<8)+ggpal[ch]];
}
slopalptr--;
@ -4214,7 +4213,7 @@ static void grouscan(int32_t dax1, int32_t dax2, int32_t sectnum, char dastat)
if ((globalorientation&256)==0)
slopevlin(ylookup[y2]+x+frameoffset,krecipasm(asm3>>3),(intptr_t)nptr2,y2-y1+1,globalx1,globaly1);
else
tslopevlin(ylookup[y2]+x+frameoffset,krecipasm(asm3>>3),(intptr_t)nptr2,y2-y1+1,globalx1,globaly1);
tslopevlin((uint8_t *)(ylookup[y2]+x+frameoffset),0,nptr2,y2-y1+1,globalx1,globaly1);
if ((x&15) == 0) faketimerhandler();
}