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Source/Engine/Graphics/Textures/ITextureOwner.h

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Engine/Core/Types/DataContainer.h"
+#include "Engine/Content/Storage/FlaxStorage.h"
+
+class GPUTexture;
+class Task;
+
+/// <summary>
+/// Interface for objects that can manage streamable texture
+/// </summary>
+class FLAXENGINE_API ITextureOwner
+{
+public:
+
+    /// <summary>
+    /// Gets the texture owner mutex used to synchronize texture logic.
+    /// </summary>
+    /// <returns>The mutex.</returns>
+    virtual CriticalSection* GetOwnerLocker() const = 0;
+
+    /// <summary>
+    /// Get texture mip map data
+    /// </summary>
+    /// <param name="mipIndex">Mip map index</param>
+    /// <returns>Task that will get asset data (may be null if data already loaded).</returns>
+    virtual Task* RequestMipDataAsync(int32 mipIndex) = 0;
+
+    /// <summary>
+    /// Prepares texture data. May lock data chunks to be keep in cache for a while.
+    /// </summary>
+    virtual FlaxStorage::LockData LockData() = 0;
+
+    /// <summary>
+    /// Gets texture mip map data. May fail if not data requested. See RequestMipDataAsync.
+    /// </summary>
+    /// <param name="mipIndex">Mip map index</param>
+    /// <param name="data">Result data</param>
+    virtual void GetMipData(int32 mipIndex, BytesContainer& data) const = 0;
+
+    /// <summary>
+    /// Gets texture mip map data. Performs loading if data is not in memory (may stall the callee thread).
+    /// </summary>
+    /// <param name="mipIndex">Mip map index</param>
+    /// <param name="data">Result data</param>
+    virtual void GetMipDataWithLoading(int32 mipIndex, BytesContainer& data) const
+    {
+        GetMipData(mipIndex, data);
+    }
+
+    /// <summary>
+    /// Gets texture mip map data row and slice pitch. Cna be used to override the default values.
+    /// </summary>
+    /// <param name="mipIndex">Mip map index</param>
+    /// <param name="rowPitch">Data row pitch (in bytes).</param>
+    /// <param name="slicePitch">Data slice pitch (in bytes).</param>
+    /// <returns>True if has a custom row/slice pitch values, otherwise false (to use default values).</returns>
+    virtual bool GetMipDataCustomPitch(int32 mipIndex, uint32& rowPitch, uint32& slicePitch) const
+    {
+        return false;
+    }
+};