Directories
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codec
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ccitt
Package ccitt decodes CCITT Group 3 and Group 4 fax coding: the one-dimensional modified Huffman (MH) and two-dimensional modified READ (MR) schemes of ITU-T T.4 and the modified modified READ (MMR) scheme of ITU-T T.6.
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Package ccitt decodes CCITT Group 3 and Group 4 fax coding: the one-dimensional modified Huffman (MH) and two-dimensional modified READ (MR) schemes of ITU-T T.4 and the modified modified READ (MMR) scheme of ITU-T T.6. |
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jbig2
Package jbig2 decodes the JBIG2 bi-level images embedded in PDF files through the JBIG2Decode filter (ISO 32000-1 §7.4.7): the "embedded stream" organisation of ITU-T T.88 Annex D.3, a sequence of segments without a file header, optionally preceded by the shared segments of a /JBIG2Globals stream.
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Package jbig2 decodes the JBIG2 bi-level images embedded in PDF files through the JBIG2Decode filter (ISO 32000-1 §7.4.7): the "embedded stream" organisation of ITU-T T.88 Annex D.3, a sequence of segments without a file header, optionally preceded by the shared segments of a /JBIG2Globals stream. |
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Package crypt implements the PDF standard security handler (ISO 32000-1 §7.6.3 and ISO 32000-2 §7.6.4): RC4 and AES stream/string decryption with the file key derived from a supplied user or owner password.
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Package crypt implements the PDF standard security handler (ISO 32000-1 §7.6.3 and ISO 32000-2 §7.6.4): RC4 and AES stream/string decryption with the file key derived from a supplied user or owner password. |
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Package encoding implements the simple-font character encodings of ISO 32000-1 Annex D and the Adobe Glyph List glyph-name algorithm.
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Package encoding implements the simple-font character encodings of ISO 32000-1 Annex D and the Adobe Glyph List glyph-name algorithm. |
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Package filter implements the PDF stream decode filters of ISO 32000-1 §7.4 that text extraction needs: FlateDecode, LZWDecode, ASCIIHexDecode, ASCII85Decode and RunLengthDecode, with the PNG and TIFF predictors.
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Package filter implements the PDF stream decode filters of ISO 32000-1 §7.4 that text extraction needs: FlateDecode, LZWDecode, ASCIIHexDecode, ASCII85Decode and RunLengthDecode, with the PNG and TIFF predictors. |
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Package object is a native PDF object layer: a lexer and parser for the COS object syntax (ISO 32000-1 §7.2–7.3), cross-reference tables and streams (§7.5), and a Value model for navigating the resulting object graph.
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Package object is a native PDF object layer: a lexer and parser for the COS object syntax (ISO 32000-1 §7.2–7.3), cross-reference tables and streams (§7.5), and a Value model for navigating the resulting object graph. |
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Package safeio bounds reads from untrusted streams: decompression bombs and stalled filter chains must cost bounded memory and CPU.
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Package safeio bounds reads from untrusted streams: decompression bombs and stalled filter chains must cost bounded memory and CPU. |
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