Fix Animated WebP Support: Canvas Size Detection and Alpha Channel Handling #3
+108
−9
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Includes changes in PR submitted to Piexif project: hMatoba#146
Description
This pull request addresses two key issues related to handling animated WebP files in the Piexif library:
Canvas Size Detection:
VP8X
chunk dimensions were incorrectly set based on the last frame encountered, which could result in canvas dimensions being too small when frames of varying sizes were present.VP8X
chunk accurately reflects the overall canvas size.Alpha Channel Detection for Animated Frames:
VP8X
chunk for animated WebP files whereALPH
chunks were nested withinANMF
chunks._get_sub_chunks_from_anmf
, has been introduced to recursively examine sub-chunks withinANMF
chunks while preventing excessive recursion through a depth limit.Testing