[Libreoffice-commits] core.git: vcl/unx

Libreoffice Gerrit user logerrit at kemper.freedesktop.org
Thu Jan 17 15:52:24 UTC 2019


 vcl/unx/generic/print/bitmap_gfx.cxx |    3 +++
 1 file changed, 3 insertions(+)

New commits:
commit 810e5008e75e54241e056de2129886689d7c21eb
Author:     Stephan Bergmann <sbergman at redhat.com>
AuthorDate: Thu Jan 17 14:35:34 2019 +0100
Commit:     Stephan Bergmann <sbergman at redhat.com>
CommitDate: Thu Jan 17 16:51:59 2019 +0100

    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 at redhat.com>

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);
 


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