raise max images size and manually set chunk size

Author: xyi

src/spatialdata_io/readers/g4x.py

@@ -7,6 +7,7 @@
 import dask.dataframe as dd
 import numpy as np
 import glymur
+import PIL
 from anndata.io import read_h5ad
 from dask.array.image import imread
 from spatialdata import SpatialData, to_polygons
@@ -22,9 +23,12 @@
 from spatialdata_io._constants._constants import G4XKeys
 from spatialdata_io._docs import inject_docs
 
+PIL.Image.MAX_IMAGE_PIXELS = 500000000
+
 __all__ = ["g4x"]
 
 
+
 @inject_docs(xx=G4XKeys)
 def g4x(
     input_path: str | Path,
@@ -355,7 +359,7 @@ def _write_he(
         kwargs["scale_factors"] = (
             [2, 2, 2] if "scale_factors" not in kwargs else kwargs["scale_factors"]
         )
-        kwargs["chunks"] = "auto" if "chunks" not in kwargs else kwargs["chunks"]
+        kwargs["chunks"] = [1, 1024, 1024] if "chunks" not in kwargs else kwargs["chunks"]
         sdata[img_key] = Image2DModel.parse(img, **kwargs)
         logger.debug(f"Writing Image2DModel for {img_key}")
         sdata.write_element(img_key)