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Try to merge subresource states for resources that were split apart

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* When a barrier applies to only one subresource out of an image, it's
  split into individual subresource tracking. There's nothing to merge
  it back together again, so it remains split even if the subresources
  go back to all being in the same state again. Simply checking when
  fetching the frame-initial states if we can merge can be a big win.
This commit is contained in:
baldurk
2017-01-27 11:00:22 +00:00
parent 9690db525b
commit 804ffb00e2
1 changed files with 34 additions and 0 deletions
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renderdoc/driver/vulkan/vk_manager.cpp
+34
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@@ -325,6 +325,40 @@ void VulkanResourceManager::SerialiseImageStates(map<ResourceId, ImageLayouts> &
else
++it;
}
// try to merge images that have been split up by subresource but are now all in the same state
// again.
for(auto it = states.begin(); it != states.end(); ++it)
{
ImageLayouts &layouts = it->second;
if(layouts.subresourceStates.size() > 1 &&
layouts.subresourceStates.size() == layouts.layerCount * layouts.levelCount)
{
VkImageLayout layout = layouts.subresourceStates[0].newLayout;
bool allIdentical = true;
for(size_t i = 0; i < layouts.subresourceStates.size(); i++)
{
if(layouts.subresourceStates[i].newLayout != layout)
{
allIdentical = false;
break;
}
}
if(allIdentical)
{
layouts.subresourceStates.erase(layouts.subresourceStates.begin() + 1,
layouts.subresourceStates.end());
layouts.subresourceStates[0].subresourceRange.baseArrayLayer = 0;
layouts.subresourceStates[0].subresourceRange.baseMipLevel = 0;
layouts.subresourceStates[0].subresourceRange.layerCount = layouts.layerCount;
layouts.subresourceStates[0].subresourceRange.levelCount = layouts.levelCount;
}
}
}
}
void VulkanResourceManager::MarkSparseMapReferenced(SparseMapping *sparse)