JPG Reading Implemented

Added a JPG module that calls jpegio and updated the base __init__.py to recognize JPG files.

Author: ch4nsuk3

adafruit_imageload/__init__.py

@@ -68,6 +68,7 @@ def load(
     with open_file as file:
         header = file.read(3)
         file.seek(0)
+        print(header)
         if header.startswith(b"BM"):
             from . import bmp
 
@@ -89,4 +90,8 @@ def load(
             from . import png
 
             return png.load(file, bitmap=bitmap, palette=palette)
+        if header.startswith(b"\xff\xd8"):
+            from . import jpg
+
+            return jpg.load(file, bitmap=bitmap, palette=palette)
         raise RuntimeError("Unsupported image format")

adafruit_imageload/jpg.py

@@ -0,0 +1,41 @@
+# SPDX-FileCopyrightText: 2024  Channing Ramos
+#
+# SPDX-License-Identifier: MIT
+
+"""
+`adafruit_imageload.jpg`
+====================================================
+
+Load a JPG into a bitmap by calling jpegio.
+
+* Author(s): Channing Ramos
+
+"""
+
+#A separate try for jpegio. While it has wide support it is not universal, and this import may fail.
+#If that happens an ImportError with a proper message needs to be raised
+try:
+    from jpegio import JpegDecoder
+except ImportError:
+    print("jpegio not supported on this board.")
+
+try:
+    from io import BufferedReader
+    from typing import Tuple, Iterator, Optional, List
+    from .displayio_types import PaletteConstructor, BitmapConstructor
+except ImportError:
+    pass
+
+from displayio import Bitmap, ColorConverter, Colorspace
+
+def load(file: BufferedReader,
+         *,
+         bitmap: BitmapConstructor,
+         palette: Optional[PaletteConstructor] = None) -> Tuple[Bitmap, Optional[ColorConverter]]:
+
+    decoder = JpegDecoder()
+    width, height = decoder.open(file)
+    bitmap_obj = bitmap(width, height, 65535)
+    decoder.decode(bitmap_obj)
+
+    return bitmap_obj, ColorConverter(input_colorspace=Colorspace.RGB565_SWAPPED)