From 922e239cca2a45d239dd02f0a4b85b72a7918917 Mon Sep 17 00:00:00 2001 From: Andrew Murray Date: Wed, 24 May 2023 08:55:14 +1000 Subject: [PATCH] Fixed saving multiple 1 mode images to GIF --- Tests/test_file_gif.py | 13 +++++++++++++ src/PIL/GifImagePlugin.py | 2 +- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/Tests/test_file_gif.py b/Tests/test_file_gif.py index 8522f486aff..0e50ee1abf9 100644 --- a/Tests/test_file_gif.py +++ b/Tests/test_file_gif.py @@ -252,6 +252,19 @@ def test_roundtrip_save_all(tmp_path): assert reread.n_frames == 5 +def test_roundtrip_save_all_1(tmp_path): + out = str(tmp_path / "temp.gif") + im = Image.new("1", (1, 1)) + im2 = Image.new("1", (1, 1), 1) + im.save(out, save_all=True, append_images=[im2]) + + with Image.open(out) as reloaded: + assert reloaded.getpixel((0, 0)) == 0 + + reloaded.seek(1) + assert reloaded.getpixel((0, 0)) == 255 + + @pytest.mark.parametrize( "path, mode", ( diff --git a/src/PIL/GifImagePlugin.py b/src/PIL/GifImagePlugin.py index eadee1560b3..2f92e946751 100644 --- a/src/PIL/GifImagePlugin.py +++ b/src/PIL/GifImagePlugin.py @@ -879,7 +879,7 @@ def _get_palette_bytes(im): :param im: Image object :returns: Bytes, len<=768 suitable for inclusion in gif header """ - return im.palette.palette + return im.palette.palette if im.palette else b"" def _get_background(im, info_background):