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[testrender] Enable mipmap in optix by switching to cached ImageBuf #2155

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[testrender] Enable mipmap in optix by switching to cached ImageBuf #2155

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034df86
[testrender] Enable mipmap in optix by switching to cached version of…
AlexeySmolenchuk Aug 27, 2026
7a64287
temporary switch to seek_subimage
AlexeySmolenchuk Aug 28, 2026
87ea373
format
AlexeySmolenchuk Aug 28, 2026
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10 changes: 9 additions & 1 deletion src/testrender/optixraytracer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -936,7 +936,15 @@ OptixRaytracer::get_texture_handle(ustring filename,
filename);
return (TextureHandle*)nullptr;
}
#if 1
// Workaround until OpenImageIO fix nmiplevels() call
int32_t nmiplevels = 0;
auto inp = OIIO::ImageInput::open(filename.c_str());
while (inp->seek_subimage(0, nmiplevels))
nmiplevels++;
#else
int32_t nmiplevels = std::max(image.nmiplevels(), 1);
#endif
int32_t img_width = image.xmax() + 1;
int32_t img_height = image.ymax() + 1;

Expand Down Expand Up @@ -1001,7 +1009,7 @@ OptixRaytracer::get_texture_handle(ustring filename,
tex_desc.filterMode = cudaFilterModeLinear;
tex_desc.readMode = cudaReadModeElementType;
tex_desc.normalizedCoords = 1;
tex_desc.maxAnisotropy = 1;
tex_desc.maxAnisotropy = 16;
tex_desc.maxMipmapLevelClamp = float(nmiplevels - 1);
tex_desc.minMipmapLevelClamp = 0;
tex_desc.mipmapFilterMode = cudaFilterModeLinear;
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