public override void OnPreviewGUI(Rect rect, GUIStyle background)
{
//original preview
base.OnPreviewGUI(rect, background);
Sprite sprite = target as Sprite;
if (sprite == null)
{
return;
}
bool isTargetChanged = _oldSprite != sprite;
_oldSprite = sprite;
if (Selection.objects.Length <= SpriteAssistSettings.Settings.maxThumbnailPreviewCount)
{
if (isTargetChanged)
{
string assetPath = AssetDatabase.GetAssetPath(sprite);
_dummySprite = SpriteUtil.CreateDummySprite(sprite, assetPath);
_textureInfo = new TextureInfo(_dummySprite, assetPath);
}
SpriteProcessor?.OnPreviewGUI(rect, sprite, _dummySprite, _textureInfo);
}
}
private void Resize()
{
foreach (var selectedTarget in _targets)
{
if (SpriteImportData.TryGetSpriteImportData(selectedTarget, out var importData))
{
SpriteUtil.AddAlphaArea(importData.dummySprite, importData.assetPath);
}
}
}
public SpriteImportData(Sprite sprite, string assetPath)
{
this.sprite = sprite;
this.assetPath = assetPath;
dummySprite = SpriteUtil.CreateDummySprite(sprite, assetPath);
textureImporter = AssetImporter.GetAtPath(this.assetPath) as TextureImporter;
textureImporterSettings = new TextureImporterSettings();
textureImporter.ReadTextureSettings(textureImporterSettings);
_oldSourceAssetIdentifier = new AssetImporter.SourceAssetIdentifier(typeof(GameObject), Path.GetFileNameWithoutExtension(assetPath));
_newSourceAssetIdentifier = new AssetImporter.SourceAssetIdentifier(typeof(GameObject), MESH_PREFAB_IDENTIFIER);
}
public static bool TryGetSpriteImportData(Object obj, out SpriteImportData spriteImportData)
{
spriteImportData = null;
Sprite sprite = SpriteUtil.FindSprite(obj);
if (sprite == null)
{
return(false);
}
string assetPath = AssetDatabase.GetAssetPath(sprite);
TextureImporter textureImporter = AssetImporter.GetAtPath(assetPath) as TextureImporter;
if (textureImporter == null)
{
return(false);
}
spriteImportData = new SpriteImportData(sprite, textureImporter, assetPath);
return(spriteImportData != null);
}