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Address feedback from #11936 (support memory types without CACHED as a backup)

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This commit is contained in:
Henrik Rydgård 2019-03-26 10:39:07 +01:00
parent 87c7f2f534
commit ed1aa74827
1 changed files with 15 additions and 9 deletions
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24
ext/native/thin3d/VulkanQueueRunner.cpp
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@ -54,16 +54,22 @@ void VulkanQueueRunner::ResizeReadbackBuffer(VkDeviceSize requiredSize) {
allocInfo.allocationSize = reqs.size;
// For speedy readbacks, we want the CPU cache to be enabled. However on most hardware we then have to
// sacrifice coherency, which means manual flushing. But try to find such memory first!
VkFlags typeReqs = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT | VK_MEMORY_PROPERTY_HOST_CACHED_BIT;
if (vulkan_->MemoryTypeFromProperties(reqs.memoryTypeBits, typeReqs, &allocInfo.memoryTypeIndex)) {
readbackBufferIsCoherent_ = true;
} else {
typeReqs = VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_CACHED_BIT;
bool success = vulkan_->MemoryTypeFromProperties(reqs.memoryTypeBits, typeReqs, &allocInfo.memoryTypeIndex);
_assert_(success);
readbackBufferIsCoherent_ = false;
// sacrifice coherency, which means manual flushing. But try to find such memory first! If no cached
// memory type is available we fall back to just coherent.
const VkFlags desiredTypes[] = {
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT | VK_MEMORY_PROPERTY_HOST_CACHED_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_CACHED_BIT,
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
};
VkFlags successTypeReqs = 0;
for (VkFlags typeReqs : desiredTypes) {
if (vulkan_->MemoryTypeFromProperties(reqs.memoryTypeBits, typeReqs, &allocInfo.memoryTypeIndex)) {
successTypeReqs = typeReqs;
break;
}
}
_assert_(successTypeReqs != 0);
readbackBufferIsCoherent_ = (successTypeReqs & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) != 0;
VkResult res = vkAllocateMemory(device, &allocInfo, nullptr, &readbackMemory_);
if (res != VK_SUCCESS) {