Log Message:
-----------
Change arguments passed to dvipng
Modified Files:
--------------
webwork-modperl/lib/WeBWorK:
Constants.pm
Revision Data
-------------
Index: Constants.pm
===================================================================
RCS file: /webwork/cvs/system/webwork-modperl/lib/WeBWorK/Constants.pm,v
retrieving revision 1.29
retrieving revision 1.30
diff -Llib/WeBWorK/Constants.pm -Llib/WeBWorK/Constants.pm -u -r1.29 -r1.30
--- lib/WeBWorK/Constants.pm
+++ lib/WeBWorK/Constants.pm
@@ -75,12 +75,19 @@
# Arguments to pass to dvipng. This is dependant on the version of dvipng.
#
-# For dvipng < 1.0
+# For dvipng versions 0.x
# $WeBWorK::PG::ImageGenerator::DvipngArgs = "-x4000.5 -bgTransparent -Q6 -mode toshiba -D180";
-# For dvipng >= 1.0
+# For dvipng versions 1.0 to 1.5
# $WeBWorK::PG::ImageGenerator::DvipngArgs = "-bgTransparent -D120 -q -depth";
#
-$WeBWorK::PG::ImageGenerator::DvipngArgs = "-bgTransparent -D120 -q -depth";
+# For dvipng versions 1.6 (and probably above)
+# $WeBWorK::PG::ImageGenerator::DvipngArgs = "-bgtransparent -D120 -q -depth";
+# Note: In 1.6 and later, bgTransparent gives alpha-channel transparency while
+# bgtransparent gives single-bit transparency. If you use alpha-channel transparency,
+# the images will not be viewable with MSIE. bgtransparent works for versions lower
+# than 1.6, but does not give transparent backgrounds.
+#
+$WeBWorK::PG::ImageGenerator::DvipngArgs = "-bgtransparent -D120 -q -depth";
# If true, don't delete temporary files
#
|
