update libs

Packages/com.unity.asset-store-tools/Editor/Previews/Scripts/Utility/GraphicsUtility.cs

@@ -0,0 +1,96 @@
+using UnityEngine;
+
+namespace AssetStoreTools.Previews.Utility
+{
+    internal static class GraphicsUtility
+    {
+        public static Texture2D GetTextureFromCamera(Camera camera, int desiredWidth, int desiredHeight, int desiredDepth)
+        {
+            var texture = new Texture2D(desiredWidth, desiredHeight);
+            var originalRenderTexture = RenderTexture.active;
+            var renderTexture = RenderTexture.GetTemporary(desiredWidth, desiredHeight, desiredDepth);
+            var cameraInitiallyEnabled = camera.enabled;
+
+            try
+            {
+                if (cameraInitiallyEnabled)
+                    camera.enabled = false;
+
+                camera.targetTexture = renderTexture;
+                camera.Render();
+
+                RenderTexture.active = renderTexture;
+                texture.ReadPixels(new Rect(0, 0, texture.width, texture.height), 0, 0);
+                texture.Apply();
+            }
+            finally
+            {
+                camera.targetTexture = null;
+                RenderTexture.active = originalRenderTexture;
+                RenderTexture.ReleaseTemporary(renderTexture);
+                camera.enabled = cameraInitiallyEnabled;
+            }
+
+            return texture;
+        }
+
+        public static Texture2D ResizeTexture(Texture2D source, int desiredWidth, int desiredHeight)
+        {
+            var texture = new Texture2D(desiredWidth, desiredHeight);
+            var originalRenderTexture = RenderTexture.active;
+            var renderTexture = RenderTexture.GetTemporary(desiredWidth, desiredHeight, 32);
+
+            try
+            {
+                RenderTexture.active = renderTexture;
+                Graphics.Blit(source, renderTexture);
+
+                texture.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
+                texture.Apply();
+            }
+            finally
+            {
+                RenderTexture.active = originalRenderTexture;
+                RenderTexture.ReleaseTemporary(renderTexture);
+            }
+
+            return texture;
+        }
+
+        public static Texture2D ResizeTextureNormalMap(Texture2D source, int desiredWidth, int desiredHeight)
+        {
+            var texture = new Texture2D(desiredWidth, desiredHeight);
+            var originalRenderTexture = RenderTexture.active;
+            var renderTexture = RenderTexture.GetTemporary(desiredWidth, desiredHeight, 32, RenderTextureFormat.Default, RenderTextureReadWrite.Linear);
+
+            try
+            {
+                RenderTexture.active = renderTexture;
+                Graphics.Blit(source, renderTexture);
+
+                texture.ReadPixels(new Rect(0, 0, renderTexture.width, renderTexture.height), 0, 0);
+
+                for (int i = 0; i < texture.width; i++)
+                {
+                    for (int j = 0; j < texture.height; j++)
+                    {
+                        var color = texture.GetPixel(i, j);
+                        color.b = color.r;
+                        color.r = color.a;
+                        color.a = 1;
+                        texture.SetPixel(i, j, color);
+                    }
+                }
+
+                texture.Apply();
+            }
+            finally
+            {
+                RenderTexture.active = originalRenderTexture;
+                RenderTexture.ReleaseTemporary(renderTexture);
+            }
+
+            return texture;
+        }
+    }
+}