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Fix mipmap sampling bug

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This commit is contained in:
Magnus Norddahl 2016-11-03 12:51:07 +01:00
commit 90c8b3370a
2 changed files with 3 additions and 3 deletions
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4
src/r_segs.cpp
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@ -1159,12 +1159,12 @@ WallscanSampler::WallscanSampler(int y1, float swal, double yrepeat, fixed_t xof
int mipmap_offset = 0;
int mip_width = texture->GetWidth();
int mip_height = texture->GetHeight();
if (r_mipmap && texture->Mipmapped())
if (r_mipmap && texture->Mipmapped() && mip_width > 1 && mip_height > 1)
{
uint32_t xpos = (uint32_t)((((uint64_t)xoffset) << FRACBITS) / mip_width);
double texture_bias = 1.7f;
double level = MAX(magnitude - 3.0, 0.0);
while (level > texture_bias)
while (level > texture_bias && mip_width > 1 && mip_height > 1)
{
mipmap_offset += mip_width * mip_height;
level *= 0.5f;