Add ability to set zlib compression level globally

1 files changed, 9 insertions, 1 deletions

diff --git a/libqpdf/Pl_Flate.cc b/libqpdf/Pl_Flate.cc
index a782255b..1eca837e 100644
--- a/libqpdf/Pl_Flate.cc
+++ b/libqpdf/Pl_Flate.cc
@@ -6,6 +6,8 @@
 #include <qpdf/QUtil.hh>
 #include <qpdf/QIntC.hh>
 
+int Pl_Flate::compression_level = Z_DEFAULT_COMPRESSION;
+
 Pl_Flate::Members::Members(size_t out_bufsize,
                            action_e action) :
     out_bufsize(out_bufsize),
@@ -120,7 +122,7 @@ Pl_Flate::handleData(unsigned char* data, size_t len, int flush)
 #endif
 	if (this->m->action == a_deflate)
 	{
-	    err = deflateInit(&zstream, Z_DEFAULT_COMPRESSION);
+	    err = deflateInit(&zstream, compression_level);
 	}
 	else
 	{
@@ -236,6 +238,12 @@ Pl_Flate::finish()
 }
 
 void
+Pl_Flate::setCompressionLevel(int level)
+{
+    compression_level = level;
+}
+
+void
 Pl_Flate::checkError(char const* prefix, int error_code)
 {
     z_stream& zstream = *(static_cast<z_stream*>(this->m->zdata));