Merge pull request #356 from P0rc3lain/fix-mip-maps-crashes

Fix crashes that happen during mip map generation

Author: mateuszstompor

Engine/Core/Extensions/ModelIO/MDLTexture+Extension.swift

@@ -7,6 +7,9 @@ import ModelIO
 import simd
 
 extension MDLTexture {
+    var canBeMipMapped: Bool {
+        dimensions.x >= 2 && dimensions.y >= 2
+    }
     static func solid2D(color: simd_float4, name: String) -> MDLTexture {
         MDLTexture(data: Data.solid2DTexture(color: color),
                    topLeftOrigin: true,
@@ -23,7 +26,7 @@ extension MDLTexture {
                 generateMipMaps: Bool = true) -> MTLTexture? {
         let loader = MTKTextureLoader(device: device)
         let options: [MTKTextureLoader.Option: Any] = [
-            .generateMipmaps: true,
+            .generateMipmaps: canBeMipMapped && generateMipMaps,
             .textureUsage: NSNumber(value: usage.rawValue),
             .textureStorageMode: NSNumber(value: storageMode.rawValue)
         ]