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Grzegorz MartensandClaude Opus 5.5
7f9554f29b
Redaction wrote every cleared copy as Flate, so a redacted Group 4 or JBIG2 scan page grew several times over until the optimizer ran. A cleared one-bit image of one component is now stored as the smallest of Flate, CCITT Group 4 and, when it was JBIG2, JBIG2 (PDF 1.4, which such a file already is), as stored, dictionary included: a tiny image can lose by Group 4's parameters. Both are coded from the cleared samples, so nothing of the original's code is carried over; rows Group 4 or JBIG2 can't code (too wide) leave Flate. Images of more bits stay Flate. Tests: a cleared one-bit Flate scan of ragged word blocks (where Group 4 is smaller than Flate) comes out Group 4 and an eight-bit image Flate, each decoding to the cleared samples (the whole buffer); a tiny image whose Group 4 code is shorter but whose stream isn't, and rows wider than Group 4 codes, stay Flate and clear; the redacted JBIG2 scan of #5461's test comes out JBIG2, smaller than Flate, with no globals and no stream holding the original code. The tests' image helpers decode through Document::decoded_image, as image codecs need. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
26 lines
782 B
TOML
26 lines
782 B
TOML
[package]
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name = "pdfcraft-redact"
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description = "Redaction (architecture §11.2): marks, apply (glyphs, images, vectors, XObjects, annotations, fields), verification"
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version.workspace = true
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edition.workspace = true
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license.workspace = true
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[lints]
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workspace = true
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[dependencies]
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pdfcraft-cos = { workspace = true }
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pdfcraft-content = { workspace = true }
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pdfcraft-fonts = { workspace = true }
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pdfcraft-model = { workspace = true }
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pdfcraft-forms = { workspace = true }
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pdfcraft-edit = { workspace = true }
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pdfcraft-annot = { workspace = true }
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pdfcraft-xfa = { workspace = true }
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# CCITT Group 4 and JBIG2 encoding for cleared one-bit images.
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pdfcraft-filters = { workspace = true }
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thiserror = { workspace = true }
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[dev-dependencies]
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pdfcraft-testkit = { workspace = true }
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