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| author | Stephan Bergmann <sbergman@redhat.com> | 2019-01-17 14:35:34 +0100 |
|---|---|---|
| committer | Stephan Bergmann <sbergman@redhat.com> | 2019-01-17 16:51:59 +0100 |
| commit | 810e5008e75e54241e056de2129886689d7c21eb (patch) | |
| tree | 588b47a18dd8760b55b8c8ea101ba35d82c2ef52 /vcl/unx/generic | |
| parent | be050c18eada0f6b483cbfccc0df91ff3837f773 (diff) | |
Comment non-obvious Ascii85Encoder::ConvertToAscii85 code
(see e.g. the "ASCII85Encode Filter" section on p. 129 of the PostScript
Language Reference Manual, 2nd ed., Addison-Wesley 1990)
Change-Id: Icfb6d64f67e40053ae8a0f292dd52bd72178ef36
Reviewed-on: https://gerrit.libreoffice.org/66522
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Diffstat (limited to 'vcl/unx/generic')
| -rw-r--r-- | vcl/unx/generic/print/bitmap_gfx.cxx | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/vcl/unx/generic/print/bitmap_gfx.cxx b/vcl/unx/generic/print/bitmap_gfx.cxx index 613920aaed27..fffe137f7981 100644 --- a/vcl/unx/generic/print/bitmap_gfx.cxx +++ b/vcl/unx/generic/print/bitmap_gfx.cxx @@ -170,6 +170,7 @@ Ascii85Encoder::PutEOD () void Ascii85Encoder::ConvertToAscii85 () { + // Add (4 - mnByte) zero padding bytes: if (mnByte < 4) std::memset (mpByteBuffer + mnByte, 0, (4 - mnByte) * sizeof(sal_uInt8)); @@ -199,6 +200,8 @@ Ascii85Encoder::ConvertToAscii85 () nByteValue /= 85; mpFileBuffer [mnOffset + 0] = (nByteValue % 85) + 33; + // Ignore the last (4 - mnByte) generated characters that correspond to the (4 - mnByte) + // zero padding bytes: mnColumn += (mnByte + 1); mnOffset += (mnByte + 1); |