From 17f03ae3d3dc53fe973f37fe4dea4a831b4f97d7 Mon Sep 17 00:00:00 2001
From: Matthias Baumgartner <dev@igsor.net>
Date: Sat, 24 Dec 2022 16:06:16 +0100
Subject: ReaderChain and image reader

---
 bsie/reader/image/_raw.py | 61 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 bsie/reader/image/_raw.py

(limited to 'bsie/reader/image/_raw.py')

diff --git a/bsie/reader/image/_raw.py b/bsie/reader/image/_raw.py
new file mode 100644
index 0000000..77be357
--- /dev/null
+++ b/bsie/reader/image/_raw.py
@@ -0,0 +1,61 @@
+"""
+
+Part of the bsie module.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import typing
+
+# external imports
+import PIL.Image
+import rawpy
+
+# bsie imports
+from bsie.utils import errors, filematcher
+
+# inner-module imports
+from .. import base
+
+# constants
+MATCH_RULE = 'mime={image/x-nikon-nef} | extension={nef}'
+
+# exports
+__all__: typing.Sequence[str] = (
+    'RawImage',
+    )
+
+
+## code ##
+
+class RawImage(base.Reader):
+    """Use rawpy to read content of raw image file types."""
+
+    # file matcher
+    match: filematcher.Matcher
+
+    # additional kwargs to rawpy's postprocess
+    rawpy_kwargs: typing.Dict[str, typing.Any]
+
+    def __init__(self, **rawpy_kwargs):
+        match_rule = rawpy_kwargs.pop('file_match_rule', MATCH_RULE)
+        self._match = filematcher.parse(match_rule)
+        self._rawpy_kwargs = rawpy_kwargs
+
+    def __call__(self, path: str) -> PIL.Image:
+        # perform quick checks first
+        if not self._match(path):
+            raise errors.ReaderError(path)
+
+        try:
+            # open file with rawpy
+            ary = rawpy.imread(path).postprocess(**self._rawpy_kwargs)
+            # convert to PIL.Image
+            return PIL.Image.fromarray(ary)
+        except (rawpy.LibRawFatalError, # pylint: disable=no-member # pylint doesn't find the errors
+                rawpy.NotSupportedError, # pylint: disable=no-member
+                rawpy.LibRawNonFatalError, # pylint: disable=no-member
+               ) as err:
+            raise errors.ReaderError(path) from err
+
+## EOF ##
-- 
cgit v1.2.3


From afd165000c1661a9cca117a4844ad3f89d926fdb Mon Sep 17 00:00:00 2001
From: Matthias Baumgartner <dev@igsor.net>
Date: Mon, 16 Jan 2023 20:53:39 +0100
Subject: unsupported file format exception

---
 bsie/reader/image/_raw.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'bsie/reader/image/_raw.py')

diff --git a/bsie/reader/image/_raw.py b/bsie/reader/image/_raw.py
index 77be357..cd60453 100644
--- a/bsie/reader/image/_raw.py
+++ b/bsie/reader/image/_raw.py
@@ -45,7 +45,7 @@ class RawImage(base.Reader):
     def __call__(self, path: str) -> PIL.Image:
         # perform quick checks first
         if not self._match(path):
-            raise errors.ReaderError(path)
+            raise errors.UnsupportedFileFormatError(path)
 
         try:
             # open file with rawpy
-- 
cgit v1.2.3