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feat(bindless): Calculate usage timeframes for pipeline signatures

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PancakeTAS 2026-04-25 19:47:13 +02:00
parent e686a1ca1c
commit 832b1ec763
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1 changed files with 49 additions and 0 deletions
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49
lsfg-vk-backend/src/modules/pipeline/signature.hpp
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@ -273,6 +273,55 @@ namespace lsfgvk::pipeline {
}
}
// Calculate usage timeline for each image
for (size_t i = 0; i < this->m_images.size(); i++) {
auto& image{this->m_images.at(i)};
if (image.flags & ImageFlag::Pinned)
continue;
std::optional<size_t> writeIndex;
std::optional<size_t> readIndex;
// Find the first stage that writes to the image and last stage that reads from it
for (size_t j = 0; j < s.stages.size(); j++) {
const auto& stage{s.stages.at(j)};
for (const auto& passIdx : stage.passes) {
const auto& pass{this->m_passes.at(passIdx)};
const bool isRead{
std::ranges::any_of(pass.inputs, [i](const auto& resource) {
return resource.idx() && *resource.idx() == i;
})
};
const bool isWritten{
std::ranges::any_of(pass.outputs, [i](const auto& resource) {
return resource.idx() && *resource.idx() == i;
})
};
if (writeIndex && isWritten)
throw "Image " + std::to_string(i) +
" is written by multiple passes";
if (isWritten && isRead)
throw "Image " + std::to_string(i) +
" is read & write in the same pass";
if (isWritten)
writeIndex.emplace(j);
if (isRead)
readIndex.emplace(std::max(readIndex.value_or(0), j));
}
}
if (!writeIndex)
throw "Image " + std::to_string(i) + " is not written to by any pass";
if (!readIndex)
throw "Image " + std::to_string(i) + " is not read from by any pass";
image.lifetime = { *writeIndex, *readIndex };
}
// Copy remaining resources into signature
for (const auto& shader : shaderInfos)
s.shaders.emplace_back(shader.id, shader.hasHdrVariant);