From 482235a8229261fa905f73ce167982bca57ab3e6 Mon Sep 17 00:00:00 2001
From: Matthias Baumgartner <dev@igsor.net>
Date: Wed, 8 Feb 2023 19:21:28 +0100
Subject: preview reader

---
 bsie/reader/preview/utils.py | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 bsie/reader/preview/utils.py

(limited to 'bsie/reader/preview/utils.py')

diff --git a/bsie/reader/preview/utils.py b/bsie/reader/preview/utils.py
new file mode 100644
index 0000000..2ef1562
--- /dev/null
+++ b/bsie/reader/preview/utils.py
@@ -0,0 +1,39 @@
+"""
+
+Part of the tagit module.
+A copy of the license is provided with the project.
+Author: Matthias Baumgartner, 2022
+"""
+# standard imports
+import typing
+
+# external imports
+import PIL.Image
+
+# exports
+__all__: typing.Sequence[str] = (
+    'resize',
+    )
+
+
+## code ##
+
+def resize(
+        img: PIL.Image.Image,
+        max_size: int,
+        ) -> PIL.Image.Image:
+    """Resize an image to a given maximum side length."""
+    # determine target dimensions
+    ratio = img.width / img.height
+    if img.width > img.height:
+        width, height = max_size, round(max_size / ratio)
+    else:
+        width, height = round(ratio * max_size), max_size
+    # rescale and return
+    return img.resize(
+        (width, height),
+        resample=PIL.Image.Resampling.LANCZOS, # create high-quality image
+        reducing_gap=3.0, # optimize computation via fast size reduction
+        )
+
+## EOF ##
-- 
cgit v1.2.3


From 4b5c4d486bb4f0f4da2e25ad464e8336a781cdcb Mon Sep 17 00:00:00 2001
From: Matthias Baumgartner <dev@igsor.net>
Date: Wed, 1 Mar 2023 22:31:03 +0100
Subject: removed module header stubs

---
 bsie/reader/preview/utils.py | 5 -----
 1 file changed, 5 deletions(-)

(limited to 'bsie/reader/preview/utils.py')

diff --git a/bsie/reader/preview/utils.py b/bsie/reader/preview/utils.py
index 2ef1562..82ecc31 100644
--- a/bsie/reader/preview/utils.py
+++ b/bsie/reader/preview/utils.py
@@ -1,9 +1,4 @@
-"""
 
-Part of the tagit module.
-A copy of the license is provided with the project.
-Author: Matthias Baumgartner, 2022
-"""
 # standard imports
 import typing
 
-- 
cgit v1.2.3