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R_DrawVisSprite adjustments

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* Backport the fix to an interp-based crash caused by using a combination of interpolated and uninterpolated scale in renderer calculations.
* Between this and the last commit, I attempted a refactor of this and associated functions in order to find the cause of the above crash. Committed are the changes which resulted in increased performance.
This commit is contained in:
toaster 2022-07-23 21:48:05 +01:00
parent a93f7ff7db
commit 9e3b89c54f
2 changed files with 12 additions and 29 deletions
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39
src/r_things.c
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@ -697,19 +697,6 @@ void R_DrawMaskedColumn(column_t *column)
// quick fix... something more proper should be done!!!
if (ylookup[dc_yl])
colfunc();
else if (colfunc == R_DrawColumn_8
#ifdef USEASM
|| colfunc == R_DrawColumn_8_ASM || colfunc == R_DrawColumn_8_MMX
#endif
)
{
static INT32 first = 1;
if (first)
{
CONS_Debug(DBG_RENDER, "WARNING: avoiding a crash in %s %d\n", __FILE__, __LINE__);
first = 0;
}
}
}
column = (column_t *)((UINT8 *)column + column->length + 4);
}
@ -768,19 +755,6 @@ static void R_DrawFlippedMaskedColumn(column_t *column, INT32 texheight)
// Still drawn by R_DrawColumn.
if (ylookup[dc_yl])
colfunc();
else if (colfunc == R_DrawColumn_8
#ifdef USEASM
|| colfunc == R_DrawColumn_8_ASM || colfunc == R_DrawColumn_8_MMX
#endif
)
{
static INT32 first = 1;
if (first)
{
CONS_Debug(DBG_RENDER, "WARNING: avoiding a crash in %s %d\n", __FILE__, __LINE__);
first = 0;
}
}
Z_Free(dc_source);
}
column = (column_t *)((UINT8 *)column + column->length + 4);
@ -801,7 +775,7 @@ static void R_DrawVisSprite(vissprite_t *vis)
#endif
fixed_t frac;
patch_t *patch = W_CacheLumpNum(vis->patch, PU_CACHE);
fixed_t this_scale = vis->mobj->scale;
fixed_t this_scale = vis->thingscale;
INT32 x1, x2;
INT64 overflow_test;
@ -932,8 +906,11 @@ static void R_DrawVisSprite(vissprite_t *vis)
#if 1
// Something is occasionally setting 1px-wide sprites whose frac is exactly the width of the sprite, causing crashes due to
// accessing invalid column info. Until the cause is found, let's try to correct those manually...
while (frac + vis->xiscale*(vis->x2-vis->x1) > SHORT(patch->width)<<FRACBITS && vis->x2 >= vis->x1)
vis->x2--;
{
fixed_t temp = ((frac + vis->xiscale*(vis->x2-vis->x1))>>FRACBITS) - SHORT(patch->width);
if (temp > 0)
vis->x2 -= temp;
}
#endif
for (dc_x = vis->x1; dc_x <= vis->x2; dc_x++, frac += vis->xiscale)
@ -1482,6 +1459,8 @@ static void R_ProjectSprite(mobj_t *thing)
vis->scale += scalestep*(vis->x1 - x1);
}
vis->thingscale = interp.scale;
//Fab: lumppat is the lump number of the patch to use, this is different
// than lumpid for sprites-in-pwad : the graphics are patched
vis->patch = sprframe->lumppat[rot];
@ -1697,6 +1676,8 @@ static void R_ProjectPrecipitationSprite(precipmobj_t *thing)
vis->startfrac = 0;
vis->xiscale = iscale;
vis->thingscale = interp.scale;
if (vis->x1 > x1)
vis->startfrac += vis->xiscale*(vis->x1-x1);

2
src/r_things.h
View file

@ -159,6 +159,8 @@ typedef struct vissprite_s
boolean vflip; // Flip vertically
boolean isScaled;
INT32 dispoffset; // copy of info->dispoffset, affects ordering but not drawing
fixed_t thingscale;
} vissprite_t;
// A drawnode is something that points to a 3D floor, 3D side, or masked