internal static bool rebuildAtlas( dfAtlas atlas )
{
try
{
EditorUtility.DisplayProgressBar( "Rebuilding Texture Atlas", "Processing changes to the texture atlas...", 0 );
var sprites = atlas.Items
.Where( i => i != null && !i.deleted )
.Select( i => new { source = i, texture = getTexture( i.textureGUID ) } )
.Where( i => i.texture != null )
.OrderByDescending( i => i.texture.width * i.texture.height )
.ToList();
var textures = sprites.Select( i => i.texture ).ToList();
var oldAtlasTexture = atlas.Material.mainTexture;
var texturePath = AssetDatabase.GetAssetPath( oldAtlasTexture );
var padding = EditorPrefs.GetInt( "DaikonForge.AtlasDefaultPadding", 2 );
var newAtlasTexture = new Texture2D( 0, 0, TextureFormat.RGBA32, false );
var newRects = newAtlasTexture.PackTextures2( textures.ToArray(), padding, dfTextureAtlasInspector.MaxAtlasSize, dfTextureAtlasInspector.ForceSquare );
byte[] bytes = newAtlasTexture.EncodeToPNG();
System.IO.File.WriteAllBytes( texturePath, bytes );
bytes = null;
DestroyImmediate( newAtlasTexture );
setAtlasTextureSettings( texturePath, false );
// Fix up the new sprite locations
for( int i = 0; i < sprites.Count; i++ )
{
sprites[ i ].source.region = newRects[ i ];
sprites[ i ].source.sizeInPixels = new Vector2( textures[ i ].width, textures[ i ].height );
sprites[ i ].source.texture = null;
}
// Remove any deleted sprites
atlas.Items.RemoveAll( i => i.deleted );
// Re-sort the Items collection
atlas.Items.Sort();
atlas.RebuildIndexes();
EditorUtility.SetDirty( atlas );
EditorUtility.SetDirty( atlas.Material );
dfGUIManager.RefreshAll( true );
return true;
}
catch( Exception err )
{
Debug.LogError( err.ToString(), atlas );
EditorUtility.DisplayDialog( "Error Rebuilding Texture Atlas", err.Message, "OK" );
return false;
}
finally
{
EditorUtility.ClearProgressBar();
}
}
public static void CreateAtlasFromSelection()
{
try
{
EditorUtility.DisplayProgressBar( "Creating Texture Atlas", "Adding selected textures to the Texture Atlas", 0 );
var selection = Selection
.GetFiltered( typeof( Texture2D ), SelectionMode.Assets )
.Cast<Texture2D>()
.Where( t => isReadable( t ) )
.OrderByDescending( t => t.width * t.height )
.ToArray();
if( selection.Length == 0 )
{
EditorUtility.DisplayDialog( "Create Texture Atlas", "Either no textures selected or none of the selected textures has Read/Write enabled", "OK" );
return;
}
var saveFolder = Path.GetDirectoryName( AssetDatabase.GetAssetPath( selection[ 0 ] ) );
var prefabPath = EditorUtility.SaveFilePanel( "Create Texture Atlas", saveFolder, "Texture Atlas", "prefab" );
if( string.IsNullOrEmpty( prefabPath ) )
return;
prefabPath = prefabPath.MakeRelativePath();
var padding = EditorPrefs.GetInt( "DaikonForge.AtlasDefaultPadding", 2 );
var texture = new Texture2D( 1, 1, TextureFormat.ARGB32, false );
var rects = texture.PackTextures2( selection, padding, dfTextureAtlasInspector.MaxAtlasSize, dfTextureAtlasInspector.ForceSquare );
var texturePath = Path.ChangeExtension( prefabPath, "png" );
byte[] bytes = texture.EncodeToPNG();
System.IO.File.WriteAllBytes( texturePath, bytes );
bytes = null;
DestroyImmediate( texture );
setAtlasTextureSettings( texturePath, true );
texture = AssetDatabase.LoadAssetAtPath( texturePath, typeof( Texture2D ) ) as Texture2D;
if( texture == null )
Debug.LogError( "Failed to find texture at " + texturePath );
var sprites = new List<dfAtlas.ItemInfo>();
for( int i = 0; i < rects.Length; i++ )
{
var pixelCoords = rects[ i ];
var size = new Vector2( selection[ i ].width, selection[ i ].height );
var spritePath = AssetDatabase.GetAssetPath( selection[ i ] );
var guid = AssetDatabase.AssetPathToGUID( spritePath );
var item = new dfAtlas.ItemInfo()
{
name = selection[ i ].name,
region = pixelCoords,
rotated = false,
textureGUID = guid,
sizeInPixels = size
};
sprites.Add( item );
}
sprites.Sort();
var shader = Shader.Find( "Daikon Forge/Default UI Shader" );
var atlasMaterial = new Material( shader );
atlasMaterial.mainTexture = texture;
AssetDatabase.CreateAsset( atlasMaterial, Path.ChangeExtension( texturePath, "mat" ) );
var go = new GameObject() { name = Path.GetFileNameWithoutExtension( prefabPath ) };
var atlas = go.AddComponent<dfAtlas>();
atlas.Material = atlasMaterial;
atlas.AddItems( sprites );
var prefab = PrefabUtility.CreateEmptyPrefab( prefabPath );
prefab.name = atlas.name;
PrefabUtility.ReplacePrefab( go, prefab );
DestroyImmediate( go );
AssetDatabase.Refresh();
#region Delay execution of object selection to work around a Unity issue
// Declared with null value to eliminate "uninitialized variable"
// compiler error in lambda below.
EditorApplication.CallbackFunction callback = null;
callback = () =>
{
EditorUtility.FocusProjectWindow();
go = AssetDatabase.LoadMainAssetAtPath( prefabPath ) as GameObject;
Selection.objects = new Object[] { go };
EditorGUIUtility.PingObject( go );
Debug.Log( "Texture Atlas prefab created at " + prefabPath, prefab );
EditorApplication.delayCall -= callback;
};
EditorApplication.delayCall += callback;
#endregion
}
catch( Exception err )
{
Debug.LogError( err.ToString() );
EditorUtility.DisplayDialog( "Error Creating Texture Atlas", err.Message, "OK" );
}
finally
{
EditorUtility.ClearProgressBar();
}
}
