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shader: select the primary mip for linear explicit-LOD gathers

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This commit is contained in:
nmzik
2026-10-18 20:50:03 +02:00
parent 8b51370ca1
commit ac3711ce7c
4 changed files with 41 additions and 23 deletions
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tests/ResourceTrackingTests.cpp
+15 -10
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@@ -5177,19 +5177,24 @@ void TestGatherLodSamplerValidation() {
Libs::Graphics::Prospero::BufferFormat::k32Float) << 20u;
user_data[3] = Libs::Graphics::DstSel(4, 5, 6, 7) |
(static_cast<uint32_t>(Libs::Graphics::Prospero::ImageType::kColor2D) << 28u);
user_data[9] = 0xfff000u;
constexpr std::array sampler_controls{
0u, 0x4001u, 1u << 26u, (1u << 26u) | 256u,
(1u << 26u) | (1u << 14u), 2u << 26u, 3u << 26u};
(1u << 26u) | (1u << 14u), 2u << 26u, (2u << 26u) | 256u,
(2u << 26u) | (1u << 14u), 0x0a500000u, 0x1a500000u, 3u << 26u};
for (const auto control : sampler_controls) {
user_data[10] = control;
ResourceSnapshot snapshot;
ResourceSpecialization specialization;
const bool supported = !explicit_lod || (control >> 26u) == 0 ||
control == (1u << 26u);
Check(MaterializeResources(plan, {.user_data = user_data}, snapshot,
specialization) == supported,
"explicit gather accepted an unsupported sampler or rejected a valid one");
for (const uint32_t perf_mip : {0u, 1u}) {
user_data[9] = 0xfff000u | (perf_mip << 24u);
user_data[10] = control;
ResourceSnapshot snapshot;
ResourceSpecialization specialization;
const auto filter = (control >> 26u) & 3u;
const bool supported = !explicit_lod || filter == 0 ||
(filter <= 2 && (control & 0xfffffu) == 0 &&
(filter != 2 || perf_mip == 0));
Check(MaterializeResources(plan, {.user_data = user_data}, snapshot,
specialization) == supported,
"explicit gather accepted an unsupported sampler or rejected a valid one");
}
}
}
}