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Apply shader group handle alignment where required

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Fixes #787
This commit is contained in:
Sascha Willems 2020-12-12 08:20:33 +01:00
parent 21f9cd5251
commit a369e6ed96
7 changed files with 37 additions and 26 deletions
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8
examples/raytracingshadows/raytracingshadows.cpp
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@ -282,9 +282,9 @@ public:
*/
void createShaderBindingTables() {
const uint32_t handleSize = rayTracingPipelineProperties.shaderGroupHandleSize;
const uint32_t handleAlignment = rayTracingPipelineProperties.shaderGroupHandleAlignment;
const uint32_t handleSizeAligned = vks::tools::alignedSize(rayTracingPipelineProperties.shaderGroupHandleSize, rayTracingPipelineProperties.shaderGroupHandleAlignment);
const uint32_t groupCount = static_cast<uint32_t>(shaderGroups.size());
const uint32_t sbtSize = handleSize * groupCount;
const uint32_t sbtSize = groupCount * handleSizeAligned;
std::vector<uint8_t> shaderHandleStorage(sbtSize);
VK_CHECK_RESULT(vkGetRayTracingShaderGroupHandlesKHR(device, pipeline, 0, groupCount, sbtSize, shaderHandleStorage.data()));
@ -297,8 +297,8 @@ public:
// Copy handles
memcpy(shaderBindingTables.raygen.mapped, shaderHandleStorage.data(), handleSize);
// We are using two miss shaders, so we need to get two handles for the miss shader binding table
memcpy(shaderBindingTables.miss.mapped, shaderHandleStorage.data() + handleAlignment, handleSize * 2);
memcpy(shaderBindingTables.hit.mapped, shaderHandleStorage.data() + handleAlignment * 3, handleSize);
memcpy(shaderBindingTables.miss.mapped, shaderHandleStorage.data() + handleSizeAligned, handleSize * 2);
memcpy(shaderBindingTables.hit.mapped, shaderHandleStorage.data() + handleSizeAligned * 3, handleSize);
}
/*