VideoCommon: separate the concept of a 'resource' from an 'asset'. A resource is potentially multiple assets that are chained together but represent one type of data to the rest of the system. An example is a 'material'. A 'material' is a collection of textures, a custom shader, and some metadata that all comes together to form what the concept of the material is. There will be a 'material' resource. For now, start small by introducing the interface and change our texture loading which used assets from the old resource manager, to an actual resource.

Source/Core/VideoCommon/Resources/Resource.cpp

@@ -0,0 +1,81 @@
+// Copyright 2025 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/Resources/Resource.h"
+
+namespace VideoCommon
+{
+Resource::Resource(ResourceContext resource_context)
+    : m_resource_context(std::move(resource_context))
+{
+}
+
+void Resource::NotifyAssetChanged(bool has_error)
+{
+  m_data_processed = has_error ? TaskComplete::Error : TaskComplete::No;
+  m_state = State::ReloadData;
+
+  for (Resource* reference : m_references)
+  {
+    reference->NotifyAssetChanged(has_error);
+  }
+}
+
+void Resource::NotifyAssetUnloaded()
+{
+  OnUnloadRequested();
+
+  for (Resource* reference : m_references)
+  {
+    reference->NotifyAssetUnloaded();
+  }
+}
+
+void Resource::AddReference(Resource* reference)
+{
+  m_references.insert(reference);
+}
+
+void Resource::RemoveReference(Resource* reference)
+{
+  m_references.erase(reference);
+}
+
+void Resource::NotifyAssetLoadSuccess()
+{
+  NotifyAssetChanged(false);
+}
+
+void Resource::NotifyAssetLoadFailed()
+{
+  NotifyAssetChanged(true);
+}
+
+void Resource::AssetUnloaded()
+{
+  NotifyAssetUnloaded();
+}
+
+void Resource::OnUnloadRequested()
+{
+}
+
+void Resource::ResetData()
+{
+}
+
+Resource::TaskComplete Resource::CollectPrimaryData()
+{
+  return TaskComplete::Yes;
+}
+
+Resource::TaskComplete Resource::CollectDependencyData()
+{
+  return TaskComplete::Yes;
+}
+
+Resource::TaskComplete Resource::ProcessData()
+{
+  return TaskComplete::Yes;
+}
+}  // namespace VideoCommon