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fix columnbuf crashes

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-our buffered uhh buffer needs to be only advanced per column not per screenwidth, caused the buffer to advance beyond its boundaries

-brightmap drawers get the DC_DIRECT flag to make sure they never attempt to draw buffered

removed tempbuffer alignment for now as reported by ubsan
This commit is contained in:
Alug 2025-10-19 20:38:22 +02:00
parent 2ce83bb48d
commit e8e72db32f
4 changed files with 12 additions and 24 deletions
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10
src/r_draw.cpp
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@ -546,22 +546,12 @@ void R_InitViewBuffer(INT32 width, INT32 height)
if (temp_dc.buf)
{
#if defined(__SSE__)
aligned_free(temp_dc.buf);
#else
Z_Free(temp_dc.buf);
#endif
}
memset(&temp_dc, 0, sizeof(temp_dc));
#if defined(__SSE__)
while (bufsize & 15)
bufsize++;
temp_dc.buf = static_cast<UINT8*>(aligned_alloc(16, bufsize));
#else
temp_dc.buf = static_cast<UINT8*>(Z_Calloc(bufsize, PU_STATIC, NULL));
#endif
linesize = vid.width; // killough 11/98
renderscreen = vid.screens[0]; // haleyjd 07/02/14

18
src/r_draw_column.cpp
View file

@ -96,15 +96,9 @@ FUNCINLINE static ATTRINLINE constexpr UINT8 R_DrawColumnPixel(drawcolumndata_t*
}
}
if constexpr (Type & DrawColumnType::DC_DIRECT)
{ // if we dont buffer our columns, we need to handle translucency again
// if we dont buffer our columns, we need to handle translucency again
return R_GetColumnTranslucent<Type>(dc, dest, bit, col);
}
else
{
return R_GetColumnTranslated<Type>(dc, col);
}
}
/** \brief The R_DrawColumn function
Experiment to make software go faster. Taken from the Boom source
@ -115,7 +109,6 @@ static void R_DrawColumnTemplate(drawcolumndata_t *dc)
INT32 count;
UINT8 *dest;
const INT32 vidheight = vid.height;
const INT32 vidwidth = vid.width;
// leban 1/17/99:
// removed the + 1 here, adjusted the if test, and added an increment
@ -134,7 +127,7 @@ static void R_DrawColumnTemplate(drawcolumndata_t *dc)
return;
}
if ((unsigned)dc->x >= (unsigned)vidwidth || dc->yl < 0 || dc->yh >= vidheight)
if ((unsigned)dc->x >= (unsigned)vid.width || dc->yl < 0 || dc->yh >= vidheight)
{
return;
}
@ -247,6 +240,11 @@ static void R_DrawColumnTemplate(drawcolumndata_t *dc)
else
dest = R_GetBufferOpaque(dc);
INT32 vidwidth = 8; //SoM: Oh, Oh it's MAGIC! You know...
if constexpr (Type & DrawColumnType::DC_DIRECT)
vidwidth = vid.width;
count++;
// Determine scaling, which is the only mapping to be done.
@ -367,7 +365,7 @@ static void R_DrawColumnTemplate(drawcolumndata_t *dc)
#define DEFINE_COLUMN_COMBO(name, flags) \
DEFINE_COLUMN_FUNC(name, flags) \
DEFINE_COLUMN_FUNC(name ## _Brightmap, flags|DC_BRIGHTMAP)
DEFINE_COLUMN_FUNC(name ## _Brightmap, flags|DC_DIRECT|DC_BRIGHTMAP)
DEFINE_COLUMN_COMBO(R_DrawColumn, DC_DIRECT|DC_BASIC)
DEFINE_COLUMN_COMBO(R_DrawTranslucentColumn, DC_DIRECT|DC_TRANSMAP)