private void OnPreprocessTexture()
{
//去除后缀的资源相对路径，如：Assets/Textures/idle
string assetNamePath = assetPath.Substring(0, assetPath.LastIndexOf('.'));
//资源文件无后缀的名称
string assetName = assetNamePath.Substring(assetNamePath.LastIndexOf('/') + 1);
//.xml绝对路径，如：D:/projects/unity_test/Assets/Textures/idle.xml
string xmlPath = s_projectPath + '/' + assetNamePath + ".xml";
if (File.Exists(xmlPath))
{
TextureImporter importer = (TextureImporter)assetImporter;
//通过反射调用TextureImporter.GetWidthAndHeight私有方法获取纹理的高
object[] parameters = new object[2] {
0, 0
};
MethodInfo methodInfo = importer.GetType().GetMethod("GetWidthAndHeight", BindingFlags.NonPublic | BindingFlags.Instance);
methodInfo.Invoke(importer, parameters);
int textureHeight = (int)parameters[1];
//切图
SpriteMetaData[] spritesheet = GetSpritesheetData(textureHeight, assetName, xmlPath);
//设置导入器属性
importer.textureType = TextureImporterType.Sprite;
importer.spriteImportMode = spritesheet.Length > 0 ? SpriteImportMode.Multiple : SpriteImportMode.Single;
importer.spritesheet = spritesheet;
}
}
private string getWarn(TextureImporter importer)
{
var method = importer.GetType().GetMethod("GetImportWarnings", BindingFlags.Instance | BindingFlags.NonPublic);
object obj = method.Invoke(importer, new object[] {});
if (obj == null)
{
return("");
}
else
{
return(obj.ToString());
}
}
private static UnityTexture2D GetTextureToSlice(string path)
{
TextureImporter ti = AssetImporter.GetAtPath(path) as TextureImporter;
MethodInfo method = ti.GetType().GetMethod("GetSourceTextureInformation", BindingFlags.Instance | BindingFlags.NonPublic);
var val = method.Invoke(ti, null);
SourceTextureInformation info = val as SourceTextureInformation;
int width = info.width;
int height = info.height;
UnityTexture2D tex = AssetDatabase.LoadAssetAtPath <UnityTexture2D>(path);
// we want to slice based on the original texture slice. Upscale the imported texture
var texture = CreateTemporaryDuplicate(tex, width, height);
if (texture != null)
{
texture.filterMode = tex.filterMode;
}
return(texture);
}