fix compression texture export error

Author: mapmapbear

Export/filter/TextureFile.cs

@@ -357,12 +357,34 @@ public override void SaveFile(Dictionary<string, FileData> exportFiles)
                 byte[] bytes = this._texture.EncodeToPNG();
                 File.WriteAllBytes(this.outPath, bytes);
             }
+            else if (this._format == 3)
+            {
+                string path = AssetDatabase.GetAssetPath(this._texture.GetInstanceID());
+                TextureImporter import = AssetImporter.GetAtPath(path) as TextureImporter;
+                if (import == null)
+                {
+                    Debug.LogError(LOGHEAD + path + " can't export   You should check the texture file format");
+                    return;
+                }
+                else
+                {
+                    import.textureType = TextureImporterType.Default;
+                    import.isReadable = true;
+                    import.textureCompression = TextureImporterCompression.Uncompressed;
+                    TextureImporterPlatformSettings pc = import.GetPlatformTextureSettings("Standalone");
+                    pc.overridden = true;
+                    pc.format = TextureImporterFormat.RGBA32;
+                    import.SetPlatformTextureSettings(pc);
+                    AssetDatabase.ImportAsset(path);
+
+                    byte[] bytes = this._texture.EncodeToPNG();
+                    File.WriteAllBytes(this.outPath, bytes);
+                }
+            }
             else
             {
                 Debug.LogError("Texture format UnSupport export!!!");
             }
         }
     }
-
-
 }