v4 : Add Full Metadata Parsing for WEBP Animations#3001
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JimBobSquarePants merged 3 commits intomainfrom Oct 23, 2025
Merged
v4 : Add Full Metadata Parsing for WEBP Animations#3001JimBobSquarePants merged 3 commits intomainfrom
JimBobSquarePants merged 3 commits intomainfrom
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Pull Request Overview
This PR adds comprehensive metadata parsing support for WebP animated images, addressing issues #2992 and #2988. The changes enable full frame metadata extraction during the Identify operation for animated WebP files, bringing animation metadata handling to parity with full decode operations.
Key Changes:
- Implemented
Identifymethod inWebpAnimationDecoderto extract frame metadata without full image decoding - Enhanced segment integrity handling with configurable validation for EXIF/XMP chunks
- Added resolution metadata extraction from EXIF profiles during WebP decoding
Reviewed Changes
Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.
Show a summary per file
| File | Description |
|---|---|
| WebpDecoderTests.cs | Added test cases to verify frame metadata extraction via Identify for both lossless and lossy animated WebP images |
| WebpImageInfo.cs | Added DataSize property to track encoded image data size |
| WebpDecoderCore.cs | Integrated animation decoder into Identify path and added configurable segment integrity handling |
| WebpChunkParsingUtils.cs | Enhanced optional chunk parsing with EXIF resolution extraction and segment integrity validation |
| WebpAnimationDecoder.cs | Implemented new Identify method and added ReadFrameInfo helper for metadata-only parsing |
| PngFrameMetadata.cs | Fixed documentation error: changed "hundredths" to "seconds" for frame delay description |
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Prerequisites
Description
Fixes #2992
Fixes #2988 (I wasn't using up my LFS budget for a separate run)