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Move texture info to R_DrawMaskedColumn and add bounds checking

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This commit is contained in:
Magnus Norddahl 2016-11-04 01:39:53 +01:00
commit 12a1755edf
4 changed files with 37 additions and 75 deletions
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60
src/r_things.cpp
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@ -251,9 +251,27 @@ double sprtopscreen;
bool sprflipvert;
void R_DrawMaskedColumn (const BYTE *column, const FTexture::Span *span, bool useRt)
void R_DrawMaskedColumn (FTexture *tex, fixed_t col, bool useRt, bool unmasked)
{
const FTexture::Span *span;
const BYTE *column;
if (r_swtruecolor && !drawer_needs_pal_input)
column = (const BYTE *)tex->GetColumnBgra(col >> FRACBITS, &span);
else
column = tex->GetColumn(col >> FRACBITS, &span);
FTexture::Span unmaskedSpan[2];
if (unmasked)
{
span = unmaskedSpan;
unmaskedSpan[0].TopOffset = 0;
unmaskedSpan[0].Length = tex->GetHeight();
unmaskedSpan[1].TopOffset = 0;
unmaskedSpan[1].Length = 0;
}
int pixelsize = r_swtruecolor ? 4 : 1;
while (span->Length != 0)
{
const int length = span->Length;
@ -283,6 +301,15 @@ void R_DrawMaskedColumn (const BYTE *column, const FTexture::Span *span, bool us
dc_source = column;
dc_dest = (ylookup[dc_yl] + dc_x) * pixelsize + dc_destorg;
dc_count = dc_yh - dc_yl + 1;
fixed_t maxfrac = ((top + length) << FRACBITS) - 1;
dc_texturefrac = MAX(dc_texturefrac, 0);
dc_texturefrac = MIN(dc_texturefrac, maxfrac);
if (dc_iscale > 0)
dc_count = MIN(dc_count, (maxfrac - dc_texturefrac + dc_iscale - 1) / dc_iscale);
else if (dc_iscale < 0)
dc_count = MIN(dc_count, (dc_texturefrac - dc_iscale) / (-dc_iscale));
if (useRt)
hcolfunc_pre();
else
@ -364,8 +391,6 @@ static inline bool R_ClipSpriteColumnWithPortals(vissprite_t* spr)
//
void R_DrawVisSprite (vissprite_t *vis)
{
const BYTE *pixels;
const FTexture::Span *spans;
fixed_t frac;
FTexture *tex;
int x2, stop4;
@ -432,13 +457,8 @@ void R_DrawVisSprite (vissprite_t *vis)
{
while ((dc_x < stop4) && (dc_x & 3))
{
if (r_swtruecolor && !drawer_needs_pal_input)
pixels = (const BYTE *)tex->GetColumnBgra (frac >> FRACBITS, &spans);
else
pixels = tex->GetColumn (frac >> FRACBITS, &spans);
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
R_DrawMaskedColumn (pixels, spans, false);
R_DrawMaskedColumn (tex, frac, false);
dc_x++;
frac += xiscale;
}
@ -448,13 +468,8 @@ void R_DrawVisSprite (vissprite_t *vis)
rt_initcols(nullptr);
for (int zz = 4; zz; --zz)
{
if (r_swtruecolor && !drawer_needs_pal_input)
pixels = (const BYTE *)tex->GetColumnBgra (frac >> FRACBITS, &spans);
else
pixels = tex->GetColumn (frac >> FRACBITS, &spans);
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
R_DrawMaskedColumn (pixels, spans, true);
R_DrawMaskedColumn (tex, frac, true);
dc_x++;
frac += xiscale;
}
@ -463,13 +478,8 @@ void R_DrawVisSprite (vissprite_t *vis)
while (dc_x < x2)
{
if (r_swtruecolor && !drawer_needs_pal_input)
pixels = (const BYTE *)tex->GetColumnBgra (frac >> FRACBITS, &spans);
else
pixels = tex->GetColumn (frac >> FRACBITS, &spans);
if (ispsprite || !R_ClipSpriteColumnWithPortals(vis))
R_DrawMaskedColumn (pixels, spans, false);
R_DrawMaskedColumn (tex, frac, false);
dc_x++;
frac += xiscale;
}
@ -623,14 +633,8 @@ void R_WallSpriteColumn (bool useRt)
else
sprtopscreen = CenterY - dc_texturemid * spryscale;
const BYTE *column;
const FTexture::Span *spans;
if (r_swtruecolor && !drawer_needs_pal_input)
column = (const BYTE *)WallSpriteTile->GetColumnBgra (lwall[dc_x] >> FRACBITS, &spans);
else
column = WallSpriteTile->GetColumn (lwall[dc_x] >> FRACBITS, &spans);
dc_texturefrac = 0;
R_DrawMaskedColumn(column, spans, useRt);
R_DrawMaskedColumn(WallSpriteTile, lwall[dc_x], useRt);
rw_light += rw_lightstep;
}