Merge pull request #1215 from anatawa12/crunch-optimize-texture

fix: Optimize Texture broken with crunch compression

CHANGELOG-PRERELEASE.md

@@ -20,6 +20,7 @@ The format is based on [Keep a Changelog].
 
 ### Fixed
 - Typo in menu for creating Asset Description `#1213`
+- Optimize Texture broken with Crunch Compression `#1215`
 
 ### Security
 

CHANGELOG.md

@@ -14,7 +14,7 @@ The format is based on [Keep a Changelog].
     - We may relax some restriction in the future.
   - Because we have to check for each condition if we use AnyState but we can check for only one (in best case) with entry/exit, this generally reduces cost for checking an parameter in a state.
   - Combined with Entry / Exit to 1D BlendTree optimization, which is implemented in previous release, your AnyState layer may be optimized to 1D BlendTree.
-- Optimize Texture in Trace nad Optimize `#1181` `#1184` `#1193`
+- Optimize Texture in Trace nad Optimize `#1181` `#1184` `#1193` `#1215`
   - Avatar Optimizer will pack texture and tries to reduce the VRAM usage.
   - Currently liltoon is only supported.
 - `Copy Enablement Animation` to Merge Skinned Mesh `#1173`

Editor/Processors/TraceAndOptimize/OptimizeTexture.cs

@@ -735,9 +735,9 @@ private AtlasResult BuildAtlasResult(AtlasIsland[] atlasIslands, Vector2 atlasSi
             Texture2D newTexture;
 
             var mipmapCount = Mathf.Min(Utils.MostSignificantBit(Mathf.Min(newWidth, newHeight)), texture2D.mipmapCount);
-            if (useBlockCopying && GraphicsFormatUtility.IsCompressedFormat(texture2D.format) && mipmapCount == 1)
+            // Crunch compressed texture will return empty array for `GetRawTextureData`
+            if (useBlockCopying && GraphicsFormatUtility.IsCompressedFormat(texture2D.format) && !GraphicsFormatUtility.IsCrunchFormat(texture2D.format) && mipmapCount == 1)
             {
-
                 var destMipmapSize = GraphicsFormatUtility.ComputeMipmapSize(newWidth, newHeight, texture2D.format);
                 var sourceMipmapSize = GraphicsFormatUtility.ComputeMipmapSize(texture2D.width, texture2D.height, texture2D.format);