Change Details

Add `IMB_ispic_type_from_memory` so we can detect the format of a packed file. This removes `is_a_filepath` callback and uses a magic check for photoshop files that's compatible with OIIO. This means we can know the file format without having the file on-disk (packed files) for e.g. Even though OIIO doesn't support packed images, this doesn't have to prevent us from being able to check the file-type of in-memory data. ---- User benefit is performance unpacking images. Unpacking images will be possible without having to load the packed images into memory to get their type. See {D9500}.

Add `IMB_ispic_type_from_memory` so we can detect the format of a packed file. This removes `is_a_filepath` callback and uses a magic check for photoshop files that's compatible with OIIO. This means we can know the file format without having the file on-disk (packed files) for e.g. Even though OIIO doesn't support packed images, this doesn't have to prevent us from being able to check the file-type of in-memory data. ---- User benefit is that the fix proposed in {D9500} can be done without the performance penalty of having to load images. See {D9500}.

Add `IMB_ispic_type_from_memory` so we can detect the format of a packed file. This removes `is_a_filepath` callback and uses a magic check for photoshop files that's compatible with OIIO. This means we can know the file format without having the file on-disk (packed files) for e.g. Even though OIIO doesn't support packed images, this doesn't have to prevent us from being able to check the file-type of in-memory data. ---- User benefit is performance unpacking images. Unpacking images will be possible without having to load the packed images into memory to get their typethat the fix proposed in {D9500} can be done without the performance penalty of having to load images. See {D9500}.