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LibPDF: Split CCITT errors by group

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This commit is contained in:
Nico Weber 2024-02-12 19:37:06 -05:00 • committed by Andreas Kling
parent c201825cc8
commit eaa568210f
1 changed files with 5 additions and 2 deletions
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7
Userland/Libraries/LibPDF/Filter.cpp
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@ -306,7 +306,6 @@ PDFErrorOr<ByteBuffer> Filter::decode_ccitt(ReadonlyBytes, RefPtr<DictObject> de
}
// FIXME: Do something with these.
(void)k;
(void)require_end_of_line;
(void)encoded_byte_align;
(void)columns;
@ -315,7 +314,11 @@ PDFErrorOr<ByteBuffer> Filter::decode_ccitt(ReadonlyBytes, RefPtr<DictObject> de
(void)black_is_1;
(void)damaged_rows_before_error;
return Error::rendering_unsupported_error("CCITTFaxDecode Filter is unsupported");
if (k < 0)
return Error::rendering_unsupported_error("CCITTFaxDecode Filter Group 4 is unsupported");
if (k == 0)
return Error::rendering_unsupported_error("CCITTFaxDecode Filter Group 3, 1-D is unsupported");
return Error::rendering_unsupported_error("CCITTFaxDecode Filter Group 3, 2-D is unsupported");
}
PDFErrorOr<ByteBuffer> Filter::decode_jbig2(ReadonlyBytes)