py api additions needed for fixing [#34864].

- add rna property 'as_bytes' method so you can get a string property as python bytes (bypass encoding).
- make bpy.path.abspath/relpath compatible with bytes.
- add 'relpath' option to bpy_extras.image_utils.load_image(), so you can load an image relative to a path.

1 files changed, 9 insertions, 0 deletions

diff --git a/release/scripts/modules/bpy_extras/image_utils.py b/release/scripts/modules/bpy_extras/image_utils.py
index 36994d3fddd..5c63ce1218e 100644
--- a/release/scripts/modules/bpy_extras/image_utils.py
+++ b/release/scripts/modules/bpy_extras/image_utils.py
@@ -31,6 +31,7 @@ def load_image(imagepath,
                ncase_cmp=True,
                convert_callback=None,
                verbose=False,
+               relpath=None,
                ):
     """
     Return an image from the file path with options to search multiple paths
@@ -57,6 +58,8 @@ def load_image(imagepath,
        convert it to a PNG and return the PNG's path.
        For formats blender can read, simply return the path that is given.
     :type convert_callback: function
+    :arg relpath: If not None, make the file relative to this path.
+    :type relpath: None or string
     :return: an image or None
     :rtype: :class:`bpy.types.Image`
     """
@@ -100,6 +103,12 @@ def load_image(imagepath,
         if place_holder and image is None:
             image = _image_load_placeholder(path)
 
+        if image:
+            if relpath is not None:
+                # make relative
+                from bpy.path import relpath as relpath_fn
+                image.filepath_raw = relpath_fn(path, start=relpath)
+
         return image
 
     # -------------------------------------------------------------------------