Fix deadlock in asset thumbnails rendering queue when texture streaming fails

#2057

Source/Engine/Graphics/Textures/StreamingTexture.cpp

@@ -296,6 +296,7 @@ Task* StreamingTexture::UpdateAllocation(int32 residency)
         // Setup texture
         if (texture->Init(desc))
         {
+            Streaming.Error = true;
             LOG(Error, "Cannot allocate texture {0}.", ToString());
         }
         if (allocatedResidency != 0)

Source/Engine/Graphics/Textures/TextureBase.cpp

@@ -223,6 +223,11 @@ void TextureBase::SetTextureGroup(int32 textureGroup)
     }
 }
 
+bool TextureBase::HasStreamingError() const
+{
+    return _texture.Streaming.Error;
+}
+
 BytesContainer TextureBase::GetMipData(int32 mipIndex, int32& rowPitch, int32& slicePitch)
 {
     BytesContainer result;

Source/Engine/Graphics/Textures/TextureBase.h

@@ -148,6 +148,11 @@ public:
     /// </summary>
     API_PROPERTY() void SetTextureGroup(int32 textureGroup);
 
+    /// <summary>
+    /// Returns true if texture streaming failed (eg. pixel format is unsupported or texture data cannot be uploaded to GPU due to memory limit).
+    /// </summary>
+    API_PROPERTY() bool HasStreamingError() const;
+
 public:
     /// <summary>
     /// Gets the mip data.