Refactor grdview and grdimage to use virtualfile_from_data (GenericMappingTools#1988)

Author: seisman

pygmt/src/grdimage.py

@@ -167,7 +167,9 @@ def grdimage(self, grid, **kwargs):
         with contextlib.ExitStack() as stack:
             # shading using an xr.DataArray
             if kwargs.get("I") is not None and data_kind(kwargs["I"]) == "grid":
-                shading_context = lib.virtualfile_from_grid(kwargs["I"])
+                shading_context = lib.virtualfile_from_data(
+                    check_kind="raster", data=kwargs["I"]
+                )
                 kwargs["I"] = stack.enter_context(shading_context)
 
             fname = stack.enter_context(file_context)

pygmt/src/grdview.py

@@ -131,7 +131,9 @@ def grdview(self, grid, **kwargs):
                 drapegrid = kwargs["G"]
                 if data_kind(drapegrid) in ("file", "grid"):
                     if data_kind(drapegrid) == "grid":
-                        drape_context = lib.virtualfile_from_grid(drapegrid)
+                        drape_context = lib.virtualfile_from_data(
+                            check_kind="raster", data=drapegrid
+                        )
                         kwargs["G"] = stack.enter_context(drape_context)
                 else:
                     raise GMTInvalidInput(