initial commit

source/util/growing_descriptor_pool.cpp

@@ -0,0 +1,33 @@
+
+#include "iwa/util/growing_descriptor_pool.hpp"
+
+#include <utility>
+
+#include "iwa/device.hpp"
+
+namespace iwa
+{
+GrowingDescriptorPool::GrowingDescriptorPool(ObjectPtr<Device> owner, GrowingDescriptorPoolCreationArgs args)
+    : super_t(std::move(owner)), mCreationArgs(std::move(args))
+{
+
+}
+
+ObjectPtr<DescriptorSet> GrowingDescriptorPool::allocateDescriptorSet(const DescriptorSetAllocateArgs& args)
+{
+    for (const ObjectPtr<DescriptorPool>& pool : mPools)
+    {
+        try
+        {
+            return pool->allocateDescriptorSet(args);
+        }
+        catch (vk::FragmentedPoolError&) {}
+        catch (vk::OutOfPoolMemoryError&) {}
+        // any other error shall be forwarded
+    }
+
+    // couldn't allocate in any of the existing pools, create a new one
+    mPools.push_back(getOwner()->createChild<DescriptorPool>(mCreationArgs));
+    return mPools.back()->allocateDescriptorSet(args); // raise any error that may occur
+}
+} // namespace iwa