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jpeg: Add mpf offset to ImageInfo #367

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Merged
etemesi254 merged 1 commit into from
Mar 20, 2026
Merged

jpeg: Add mpf offset to ImageInfo #367

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4 changes: 3 additions & 1 deletion crates/zune-jpeg/src/decoder.rs
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Expand Up @@ -999,7 +999,9 @@ pub struct ImageInfo {
/// Extended XMP Guid
pub extended_xmp_guid: Option<Vec<u8>>,
/// Image sub-sampling ratio
pub sample_ratio: SampleRatios
pub sample_ratio: SampleRatios,
/// The offset at which Multi picture information was found
pub multi_picture_information_offset: Option<u64>,
}

impl ImageInfo {
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1 change: 1 addition & 0 deletions crates/zune-jpeg/src/headers.rs
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Expand Up @@ -666,6 +666,7 @@ pub(crate) fn parse_app2<T: ZByteReaderTrait>(
trace!("MPF Signature present");
length = length.saturating_sub(MPF_DATA.len());
decoder.stream.skip(MPF_DATA.len())?;
decoder.info.multi_picture_information_offset = Some(decoder.stream.position()?);
// MPF signature taken from here
// https://github.com/google/libultrahdr/blob/bf2aa439eea9ad5da483003fa44182f990f74091/lib/include/ultrahdr/multipictureformat.h#L50
// https://github.com/google/libultrahdr/blob/bf2aa439eea9ad5da483003fa44182f990f74091/lib/src/multipictureformat.cpp#L36
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