PathManager passing

Summary:
Make no internal functions inside pytorch3d/io interpret str paths except using a PathManager from iopath which they have been given. This means we no longer use any global PathManager object and we no longer use fvcore's deprecated file_io.

To preserve the APIs, various top level functions create their own default-initialized PathManager object if they are not provided one.

Reviewed By: theschnitz

Differential Revision: D25372969

fbshipit-source-id: c176ee31439645fa54a157d6f1aef18b09501569

Author: bottler

pytorch3d/io/mtl_io.py

@@ -8,6 +8,7 @@
 import numpy as np
 import torch
 import torch.nn.functional as F
+from iopath.common.file_io import PathManager
 from pytorch3d.io.utils import _open_file, _read_image
 
 
@@ -391,12 +392,14 @@ def _bilinear_interpolation_grid_sample(
 TextureImages = Dict[str, torch.Tensor]
 
 
-def _parse_mtl(f, device="cpu") -> Tuple[MaterialProperties, TextureFiles]:
+def _parse_mtl(
+    f, path_manager: PathManager, device="cpu"
+) -> Tuple[MaterialProperties, TextureFiles]:
     material_properties = {}
     texture_files = {}
     material_name = ""
 
-    with _open_file(f, "r") as f:
+    with _open_file(f, path_manager, "r") as f:
         for line in f:
             tokens = line.strip().split()
             if not tokens:
@@ -438,6 +441,7 @@ def _load_texture_images(
     data_dir: str,
     material_properties: MaterialProperties,
     texture_files: TextureFiles,
+    path_manager: PathManager,
 ) -> Tuple[MaterialProperties, TextureImages]:
     final_material_properties = {}
     texture_images = {}
@@ -448,7 +452,9 @@ def _load_texture_images(
             # Load the texture image.
             path = os.path.join(data_dir, texture_files[material_name])
             if os.path.isfile(path):
-                image = _read_image(path, format="RGB") / 255.0
+                image = (
+                    _read_image(path, path_manager=path_manager, format="RGB") / 255.0
+                )
                 image = torch.from_numpy(image)
                 texture_images[material_name] = image
             else:
@@ -464,7 +470,12 @@ def _load_texture_images(
 
 
 def load_mtl(
-    f, material_names: List[str], data_dir: str, device="cpu"
+    f,
+    *,
+    material_names: List[str],
+    data_dir: str,
+    device="cpu",
+    path_manager: PathManager,
 ) -> Tuple[MaterialProperties, TextureImages]:
     """
     Load texture images and material reflectivity values for ambient, diffuse
@@ -474,6 +485,7 @@ def load_mtl(
         f: a file-like object of the material information.
         material_names: a list of the material names found in the .obj file.
         data_dir: the directory where the material texture files are located.
+        path_manager: PathManager for interpreting both f and material_names.
 
     Returns:
         material_properties: dict of properties for each material. If a material
@@ -494,7 +506,11 @@ def load_mtl(
                     ...
                 }
     """
-    material_properties, texture_files = _parse_mtl(f, device)
+    material_properties, texture_files = _parse_mtl(f, path_manager, device)
     return _load_texture_images(
-        material_names, data_dir, material_properties, texture_files
+        material_names,
+        data_dir,
+        material_properties,
+        texture_files,
+        path_manager=path_manager,
     )

pytorch3d/io/obj_io.py

@@ -9,6 +9,7 @@
 
 import numpy as np
 import torch
+from iopath.common.file_io import PathManager
 from pytorch3d.io.mtl_io import load_mtl, make_mesh_texture_atlas
 from pytorch3d.io.utils import _check_faces_indices, _make_tensor, _open_file
 from pytorch3d.renderer import TexturesAtlas, TexturesUV
@@ -68,6 +69,7 @@ def load_obj(
     texture_atlas_size: int = 4,
     texture_wrap: Optional[str] = "repeat",
     device="cpu",
+    path_manager: Optional[PathManager] = None,
 ):
     """
     Load a mesh from a .obj file and optionally textures from a .mtl file.
@@ -139,6 +141,7 @@ def load_obj(
             If `texture_mode="clamp"` the values are clamped to the range [0, 1].
             If None, then there is no transformation of the texture values.
         device: string or torch.device on which to return the new tensors.
+        path_manager: optionally a PathManager object to interpret paths.
 
     Returns:
         6-element tuple containing
@@ -207,14 +210,17 @@ def load_obj(
         # pyre-fixme[6]: Expected `_PathLike[Variable[typing.AnyStr <: [str,
         #  bytes]]]` for 1st param but got `Union[_PathLike[typing.Any], bytes, str]`.
         data_dir = os.path.dirname(f)
-    with _open_file(f, "r") as f:
+    if path_manager is None:
+        path_manager = PathManager()
+    with _open_file(f, path_manager, "r") as f:
         return _load_obj(
             f,
-            data_dir,
+            data_dir=data_dir,
             load_textures=load_textures,
             create_texture_atlas=create_texture_atlas,
             texture_atlas_size=texture_atlas_size,
             texture_wrap=texture_wrap,
+            path_manager=path_manager,
             device=device,
         )
 
@@ -226,6 +232,7 @@ def load_objs_as_meshes(
     create_texture_atlas: bool = False,
     texture_atlas_size: int = 4,
     texture_wrap: Optional[str] = "repeat",
+    path_manager: Optional[PathManager] = None,
 ):
     """
     Load meshes from a list of .obj files using the load_obj function, and
@@ -234,11 +241,13 @@ def load_objs_as_meshes(
     details. material_colors and normals are not stored.
 
     Args:
-        f: A list of file-like objects (with methods read, readline, tell,
-        and seek), pathlib paths or strings containing file names.
+        files: A list of file-like objects (with methods read, readline, tell,
+            and seek), pathlib paths or strings containing file names.
         device: Desired device of returned Meshes. Default:
             uses the current device for the default tensor type.
         load_textures: Boolean indicating whether material files are loaded
+        create_texture_atlas, texture_atlas_size, texture_wrap: as for load_obj.
+        path_manager: optionally a PathManager object to interpret paths.
 
     Returns:
         New Meshes object.
@@ -251,6 +260,7 @@ def load_objs_as_meshes(
             create_texture_atlas=create_texture_atlas,
             texture_atlas_size=texture_atlas_size,
             texture_wrap=texture_wrap,
+            path_manager=path_manager,
         )
         tex = None
         if create_texture_atlas:
@@ -431,7 +441,13 @@ def _parse_obj(f, data_dir: str):
 
 
 def _load_materials(
-    material_names: List[str], f, data_dir: str, *, load_textures: bool, device
+    material_names: List[str],
+    f,
+    *,
+    data_dir: str,
+    load_textures: bool,
+    device,
+    path_manager: PathManager,
 ):
     """
     Load materials and optionally textures from the specified path.
@@ -442,6 +458,7 @@ def _load_materials(
         data_dir: the directory where the material texture files are located.
         load_textures: whether textures should be loaded.
         device: string or torch.device on which to return the new tensors.
+        path_manager: PathManager object to interpret paths.
 
     Returns:
         material_colors: dict of properties for each material.
@@ -460,16 +477,24 @@ def _load_materials(
         return None, None
 
     # Texture mode uv wrap
-    return load_mtl(f, material_names, data_dir, device=device)
+    return load_mtl(
+        f,
+        material_names=material_names,
+        data_dir=data_dir,
+        path_manager=path_manager,
+        device=device,
+    )
 
 
 def _load_obj(
     f_obj,
+    *,
     data_dir,
     load_textures: bool = True,
     create_texture_atlas: bool = False,
     texture_atlas_size: int = 4,
     texture_wrap: Optional[str] = "repeat",
+    path_manager: PathManager,
     device="cpu",
 ):
     """
@@ -522,7 +547,12 @@ def _load_obj(
 
     texture_atlas = None
     material_colors, texture_images = _load_materials(
-        material_names, mtl_path, data_dir, load_textures=load_textures, device=device
+        material_names,
+        mtl_path,
+        data_dir=data_dir,
+        load_textures=load_textures,
+        path_manager=path_manager,
+        device=device,
     )
 
     if create_texture_atlas:
@@ -562,7 +592,13 @@ def _load_obj(
     return verts, faces, aux
 
 
-def save_obj(f, verts, faces, decimal_places: Optional[int] = None):
+def save_obj(
+    f,
+    verts,
+    faces,
+    decimal_places: Optional[int] = None,
+    path_manager: Optional[PathManager] = None,
+):
     """
     Save a mesh to an .obj file.
 
@@ -571,6 +607,8 @@ def save_obj(f, verts, faces, decimal_places: Optional[int] = None):
         verts: FloatTensor of shape (V, 3) giving vertex coordinates.
         faces: LongTensor of shape (F, 3) giving faces.
         decimal_places: Number of decimal places for saving.
+        path_manager: Optional PathManager for interpreting f if
+            it is a str.
     """
     if len(verts) and not (verts.dim() == 2 and verts.size(1) == 3):
         message = "Argument 'verts' should either be empty or of shape (num_verts, 3)."
@@ -580,7 +618,10 @@ def save_obj(f, verts, faces, decimal_places: Optional[int] = None):
         message = "Argument 'faces' should either be empty or of shape (num_faces, 3)."
         raise ValueError(message)
 
-    with _open_file(f, "w") as f:
+    if path_manager is None:
+        path_manager = PathManager()
+
+    with _open_file(f, path_manager, "w") as f:
         return _save(f, verts, faces, decimal_places)
 
 

pytorch3d/io/ply_io.py

@@ -13,6 +13,7 @@
 
 import numpy as np
 import torch
+from iopath.common.file_io import PathManager
 from pytorch3d.io.utils import _check_faces_indices, _make_tensor, _open_file
 
 
@@ -585,7 +586,7 @@ def _load_ply_raw_stream(f) -> Tuple[_PlyHeader, dict]:
     return header, elements
 
 
-def _load_ply_raw(f) -> Tuple[_PlyHeader, dict]:
+def _load_ply_raw(f, path_manager: PathManager) -> Tuple[_PlyHeader, dict]:
     """
     Load the data from a .ply file.
 
@@ -594,6 +595,7 @@ def _load_ply_raw(f) -> Tuple[_PlyHeader, dict]:
             tell and seek), a pathlib path or a string containing a file name.
             If the ply file is binary, a text stream is not supported.
             It is recommended to use a binary stream.
+        path_manager: PathManager for loading if f is a str.
 
     Returns:
         header: A _PlyHeader object describing the metadata in the ply file.
@@ -602,12 +604,12 @@ def _load_ply_raw(f) -> Tuple[_PlyHeader, dict]:
                   uniformly-sized list, then the value will be a 2D numpy array.
                   If not, it is a list of the relevant property values.
     """
-    with _open_file(f, "rb") as f:
+    with _open_file(f, path_manager, "rb") as f:
         header, elements = _load_ply_raw_stream(f)
     return header, elements
 
 
-def load_ply(f):
+def load_ply(f, path_manager: Optional[PathManager] = None):
     """
     Load the data from a .ply file.
 
@@ -645,12 +647,16 @@ def load_ply(f):
             If the ply file is in the binary ply format rather than the text
             ply format, then a text stream is not supported.
             It is easiest to use a binary stream in all cases.
+        path_manager: PathManager for loading if f is a str.
+
 
     Returns:
         verts: FloatTensor of shape (V, 3).
         faces: LongTensor of vertex indices, shape (F, 3).
     """
-    header, elements = _load_ply_raw(f)
+    if path_manager is None:
+        path_manager = PathManager()
+    header, elements = _load_ply_raw(f, path_manager=path_manager)
 
     vertex = elements.get("vertex", None)
     if vertex is None:
@@ -780,6 +786,7 @@ def save_ply(
     verts_normals: Optional[torch.Tensor] = None,
     ascii: bool = False,
     decimal_places: Optional[int] = None,
+    path_manager: Optional[PathManager] = None,
 ) -> None:
     """
     Save a mesh to a .ply file.
@@ -791,6 +798,8 @@ def save_ply(
         verts_normals: FloatTensor of shape (V, 3) giving vertex normals.
         ascii: (bool) whether to use the ascii ply format.
         decimal_places: Number of decimal places for saving if ascii=True.
+        path_manager: PathManager for interpreting f if it is a str.
+
     """
 
     verts_normals = (
@@ -816,5 +825,7 @@ def save_ply(
         message = "Argument 'verts_normals' should either be empty or of shape (num_verts, 3)."
         raise ValueError(message)
 
-    with _open_file(f, "wb") as f:
+    if path_manager is None:
+        path_manager = PathManager()
+    with _open_file(f, path_manager, "wb") as f:
         _save_ply(f, verts, faces, verts_normals, ascii, decimal_places)

pytorch3d/io/utils.py

@@ -7,7 +7,7 @@
 
 import numpy as np
 import torch
-from fvcore.common.file_io import PathManager
+from iopath.common.file_io import PathManager
 from PIL import Image
 
 
@@ -19,9 +19,9 @@ def nullcontext(x):
     yield x
 
 
-def _open_file(f, mode="r") -> ContextManager[IO]:
+def _open_file(f, path_manager: PathManager, mode="r") -> ContextManager[IO]:
     if isinstance(f, str):
-        f = open(f, mode)
+        f = path_manager.open(f, mode)
         return contextlib.closing(f)
     elif isinstance(f, pathlib.Path):
         f = f.open(mode)
@@ -58,18 +58,19 @@ def _check_faces_indices(
     return faces_indices
 
 
-def _read_image(file_name: str, format=None):
+def _read_image(file_name: str, path_manager: PathManager, format=None):
     """
     Read an image from a file using Pillow.
     Args:
         file_name: image file path.
+        path_manager: PathManager for interpreting file_name.
         format: one of ["RGB", "BGR"]
     Returns:
         image: an image of shape (H, W, C).
     """
     if format not in ["RGB", "BGR"]:
         raise ValueError("format can only be one of [RGB, BGR]; got %s", format)
-    with PathManager.open(file_name, "rb") as f:
+    with path_manager.open(file_name, "rb") as f:
         # pyre-fixme[6]: Expected `Union[str, typing.BinaryIO]` for 1st param but
         #  got `Union[typing.IO[bytes], typing.IO[str]]`.
         image = Image.open(f)