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Grzegorz MartensandClaude Opus 5.5
78fc1e5568
Part of #283. A scan stored as JBIG2 (as the optimizer writes them) is decoded through Document::decoded_image_within, its /JBIG2Globals included, and its covered pixels cleared in a Flate copy that refers to no globals, as CCITT fax images are. Before, any JBIG2 image under a mark was removed whole, blanking the page. Still removed whole (fail-closed): a JBIG2 page of another size than the image, which decoded_image refuses (the renderer draws the whole page into the image, so the rows cleared wouldn't be the ones shown); globals that can't be read; damaged data; an image claiming more than one bit or one component, even where its rows take as many bytes; a page far past the image's raster, refused before it is decoded. Globals no other image uses leave the file with the original on the full rewrite (tested); globals another image still uses stay, and the README and parity note say they may hold the shapes of marks from under the area, not where they were. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>