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Source/Editor/Viewport/Previews/IESProfilePreview.cs

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+using FlaxEngine;
+
+namespace FlaxEditor.Viewport.Previews
+{
+    /// <summary>
+    /// Preview control for <see cref="IESProfile"/> asset.
+    /// </summary>
+    /// <seealso cref="FlaxEditor.Viewport.Previews.TexturePreviewBase" />
+    public class IESProfilePreview : TexturePreviewBase
+    {
+        private IESProfile _asset;
+        private MaterialInstance _previewMaterial;
+
+        /// <summary>
+        /// Gets or sets the asset to preview.
+        /// </summary>
+        public IESProfile Asset
+        {
+            get => _asset;
+            set
+            {
+                if (_asset != value)
+                {
+                    _asset = value;
+                    _previewMaterial.SetParameterValue("Texture", value);
+                    UpdateTextureRect();
+                }
+            }
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="IESProfilePreview"/> class.
+        /// </summary>
+        public IESProfilePreview()
+        {
+            var baseMaterial = FlaxEngine.Content.LoadAsyncInternal<Material>(EditorAssets.IesProfilePreviewMaterial);
+
+            // Wait for base (don't want to async material parameters set due to async loading)
+            if (baseMaterial == null || baseMaterial.WaitForLoaded())
+                throw new FlaxException("Cannot load IES Profile preview material.");
+
+            // Create preview material (virtual)
+            _previewMaterial = baseMaterial.CreateVirtualInstance();
+        }
+
+        /// <inheritdoc />
+        public override void OnDestroy()
+        {
+            Object.Destroy(ref _previewMaterial);
+
+            base.OnDestroy();
+        }
+
+        /// <inheritdoc />
+        protected override void CalculateTextureRect(out Rectangle rect)
+        {
+            CalculateTextureRect(new Vector2(256), Size, out rect);
+        }
+
+        /// <inheritdoc />
+        protected override void DrawTexture(ref Rectangle rect)
+        {
+            // Check if has loaded asset
+            if (_asset && _asset.IsLoaded)
+            {
+                Render2D.DrawMaterial(_previewMaterial, rect);
+            }
+        }
+    }
+}