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make a note about what Z_DEFAULT_COMPRESSION means to zlib

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This commit is contained in:
Dane Springmeyer 2012-10-25 13:30:14 -07:00
parent 888e6ec941
commit f7bd53c0d3
1 changed files with 1 additions and 1 deletions
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2
src/image_util.cpp
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@ -270,7 +270,7 @@ void save_to_stream(T const& image,
if (t == "png" || boost::algorithm::starts_with(t, "png"))
{
int colors = 256;
int compression = Z_DEFAULT_COMPRESSION;
int compression = Z_DEFAULT_COMPRESSION; // usually mapped to z=6 in zlib
int strategy = Z_DEFAULT_STRATEGY;
int trans_mode = -1;
double gamma = -1;