Jorijn van der Graaf
5d25c1f825
TLASBuildBarrier drives BuildTlasReadBarrier with no GPU device: the dependency starts at the acceleration-structure build, reaches the ray-tracing and compute shader stages, and carries the acceleration-structure write -> read memory dependency that the old execution-only barrier lacked. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
51 lines
2.1 KiB
C++
51 lines
2.1 KiB
C++
//SPDX-License-Identifier: LGPL-3.0-only
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//SPDX-FileCopyrightText: Copyright (C) 2026 Catcrafts®
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// The dependency RenderingElement3D::BuildTLAS records after its build, which
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// orders the build before the shaders that read the TLAS: traceRayEXT in a
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// ray-tracing pass, rayQueryEXT in a compute pass, recorded after it in the
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// same command buffer (BuildTLAS in onUpdate, then RTPass, is the documented
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// per-frame flow). It used to be an execution-only barrier with no memory
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// barrier, which orders the commands but never makes the build's
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// acceleration-structure writes available and visible to those reads. The
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// dependency is built by BuildTlasReadBarrier, pure CPU logic that this test
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// drives directly with no GPU device, like SwapchainBarrierScope.
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#include <cstdlib>
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#include "vulkan/vulkan.h"
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import Crafter.Graphics;
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import std;
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using namespace Crafter;
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namespace {
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int failures = 0;
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void Check(bool ok, std::string_view what) {
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std::println("{} {}", ok ? "PASS" : "FAIL", what);
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if (!ok) ++failures;
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}
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} // namespace
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int main() {
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const TlasReadBarrier barrier = BuildTlasReadBarrier();
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Check(barrier.srcStage == VK_PIPELINE_STAGE_ACCELERATION_STRUCTURE_BUILD_BIT_KHR,
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"the dependency starts at the acceleration-structure build");
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Check((barrier.dstStage & VK_PIPELINE_STAGE_RAY_TRACING_SHADER_BIT_KHR) != 0,
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"it reaches ray-tracing shaders (traceRayEXT)");
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Check((barrier.dstStage & VK_PIPELINE_STAGE_COMPUTE_SHADER_BIT) != 0,
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"it reaches compute shaders (rayQueryEXT)");
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Check(barrier.memory.sType == VK_STRUCTURE_TYPE_MEMORY_BARRIER, "it carries a memory barrier");
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Check((barrier.memory.srcAccessMask & VK_ACCESS_ACCELERATION_STRUCTURE_WRITE_BIT_KHR) != 0,
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"the build's acceleration-structure writes are made available");
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Check((barrier.memory.dstAccessMask & VK_ACCESS_ACCELERATION_STRUCTURE_READ_BIT_KHR) != 0,
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"and visible to acceleration-structure reads");
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std::println("{}", failures == 0 ? "all checks passed" : "check(s) failed");
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return failures == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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