Merge pull request #13 from yany79/clear-atlas-texture-before-combining

Bugfix: Clear the atlas texture before combining quads.

Assets/MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Utils/MA_TextureAtlasserProUtils.cs

@@ -521,6 +521,13 @@ namespace MA_TextureAtlasserPro
                     name = atlas.name + "_" + atlas.textureGroupRegistration[i].name
                 };
 
+                //A new Texture2D is uninitialised, and MA_Combine2D only writes inside each quad's
+                //guiRect, so every texel no quad covers keeps whatever was left in the buffer. That
+                //garbage is opaque enough to survive an alpha cutoff and bleeds into the quads
+                //through the mip chain, so clear the atlas to transparent black before combining.
+                newTexture.SetPixels32(new Color32[newTexture.width * newTexture.height]);
+                newTexture.Apply();
+
                 foreach (MA_TextureAtlasserProQuad q in atlas.textureQuads)
                 {
                     if (q.textureGroups != null && q.textureGroups[i].texture != null)

Assets/MA_ToolBox/MA_TextureAtlasserPro/Scripts/Editor/Views/MA_TextureAtlasserProInspectorView.cs

@@ -13,6 +13,7 @@ namespace MA_TextureAtlasserPro
         private MA_TextureAtlasserProQuad lastSelectedQuad;
         private bool isEditing = false;
         private GUIStyle labelStyle = new GUIStyle(GUI.skin.label);
+        private Vector2 scrollPos = Vector2.zero;
         
         public MA_TextureAtlasserProInspectorView(MA_TextureAtlasserProWindow currentEditorWindow, string title) : base(currentEditorWindow, title)
         {
@@ -37,6 +38,10 @@ namespace MA_TextureAtlasserPro
                     }
 
                     GUILayout.BeginArea(editorViewRect, EditorStyles.helpBox);
+                    using (var scrollViewScope = new EditorGUILayout.ScrollViewScope(scrollPos, false, false))
+                    {
+                        scrollPos = scrollViewScope.scrollPosition;
+
                         GUILayout.BeginVertical(GUILayout.ExpandWidth(true));
 
                         GUILayout.Label("Quad Name");
@@ -90,6 +95,7 @@ namespace MA_TextureAtlasserPro
                         SerializedObject serializedObject = new SerializedObject(curWindow.textureAtlas.selectedTextureQuad);
                         serializedObject.Update();
 
+
                         if (curWindow.textureAtlas.selectedTextureQuad.modelGroups != null)
                         {
                             SerializedProperty modelGroupsSP = serializedObject.FindProperty("modelGroups");
@@ -164,7 +170,7 @@ namespace MA_TextureAtlasserPro
 
                         GUILayout.Label("x " + curWindow.textureAtlas.selectedTextureQuad.guiRect.x.ToString() + ", y " + curWindow.textureAtlas.selectedTextureQuad.guiRect.y.ToString());
                         GUILayout.Label("w " + curWindow.textureAtlas.selectedTextureQuad.guiRect.width.ToString() + ", h " + curWindow.textureAtlas.selectedTextureQuad.guiRect.height.ToString(), labelStyle);
-
+                    }
                     GUILayout.EndVertical();
                     GUILayout.EndArea();
                 }

Assets/MA_ToolBox/MA_Utilities/TextureUtils/MA_TextureUtils.cs

@@ -122,7 +122,11 @@ namespace MA_Texture
 
 			}
 
+#if UNITY_2021_2_OR_NEWER
+			texture.Reinitialize(newWidth, newHeight);
+#else
 			texture.Resize(newWidth, newHeight);
+#endif
 			texture.SetPixels(newColors);
 			texture.Apply();