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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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5
base/VulkanRaytracingSample.cpp
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@ -205,10 +205,11 @@ void VulkanRaytracingSample::prepare()
VkStridedDeviceAddressRegionKHR VulkanRaytracingSample::getSbtEntryStridedDeviceAddressRegion(VkBuffer buffer, uint32_t handleCount)
{
const uint32_t handleSizeAligned = vks::tools::alignedSize(rayTracingPipelineProperties.shaderGroupHandleSize, rayTracingPipelineProperties.shaderGroupHandleAlignment);
VkStridedDeviceAddressRegionKHR stridedDeviceAddressRegionKHR{};
stridedDeviceAddressRegionKHR.deviceAddress = getBufferDeviceAddress(buffer);
stridedDeviceAddressRegionKHR.stride = rayTracingPipelineProperties.shaderGroupHandleSize;
stridedDeviceAddressRegionKHR.size = rayTracingPipelineProperties.shaderGroupHandleSize * handleCount;
stridedDeviceAddressRegionKHR.stride = handleSizeAligned;
stridedDeviceAddressRegionKHR.size = handleCount * handleSizeAligned;
return stridedDeviceAddressRegionKHR;
}

6
base/VulkanTools.cpp
View file

@ -378,5 +378,11 @@ namespace vks
std::ifstream f(filename.c_str());
return !f.fail();
}
uint32_t alignedSize(uint32_t value, uint32_t alignment)
{
return (value + alignment - 1) & ~(alignment - 1);
}
}
}

2
base/VulkanTools.h
View file

@ -125,5 +125,7 @@ namespace vks
/** @brief Checks if a file exists */
bool fileExists(const std::string &filename);
uint32_t alignedSize(uint32_t value, uint32_t alignment);
}
}