need to demultiply to write proper alpha into png

Makefile

@@ -14,7 +14,7 @@ distclean:
 	if test -e ".sconf_temp/"; then rm -r ".sconf_temp/"; fi
 	if test -e ".sconsign.dblite"; then rm ".sconsign.dblite"; fi
 	if test -e "config.cache"; then rm "config.cache"; fi
-	if test -e "config.py"; then rm "config.py"; fi
+	if test -e "config.py"; then mv "config.py" "config.py.backup"; fi
 
 reset: distclean
 

include/mapnik/rule.hpp

@@ -38,6 +38,7 @@
 #include <mapnik/feature.hpp>
 #include <mapnik/expression.hpp>
 #include <mapnik/expression_string.hpp>
+#include <mapnik/config.hpp> // MAPNIK_DECL
 
 // boost
 #include <boost/concept_check.hpp>
@@ -127,7 +128,7 @@ typedef boost::variant<point_symbolizer,
                        markers_symbolizer,
                        debug_symbolizer> symbolizer;
 
-class rule
+class MAPNIK_DECL rule
 {
 public:
     typedef std::vector<symbolizer> symbolizers;

src/agg/agg_renderer.cpp

@@ -271,7 +271,10 @@ void agg_renderer<T>::end_style_processing(feature_type_style const& st)
         }
     }
     MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: End processing style";
-    mapnik::save_to_file(pixmap_, (boost::format("%02d_style.png") % renderer_pass_).str(),"png");
+    // copy pixmap so demultiply will not impact main buffer
+    mapnik::image_32 pix_tmp = pixmap_;
+    pix_tmp.demultiply();
+    mapnik::save_to_file(pix_tmp, (boost::format("%02d_style.png") % renderer_pass_).str(),"png");
     renderer_pass_++;
 }
 

src/build.py

@@ -392,4 +392,5 @@ else:
     env['create_uninstall_target'](env, target1)
     env['create_uninstall_target'](env, target)
 
-Depends(mapnik, env.subst('../deps/agg/libagg.a'))
+if not env['RUNTIME_LINK'] == 'static':
+    Depends(mapnik, env.subst('../deps/agg/libagg.a'))

src/load_map.cpp

@@ -670,7 +670,14 @@ void map_parser::parse_layer(Map & map, xml_node const& node)
                 {
                     std::map<std::string,parameters>::const_iterator base_itr = datasource_templates_.find(*base);
                     if (base_itr!=datasource_templates_.end())
+                    {
                         params = base_itr->second;
+                    }
+                    else
+                    {
+                        MAPNIK_LOG_ERROR(datasource) << "Datasource template '" << *base
+                            << "' not found for layer '" << name << "'";
+                    }
                 }
 
                 xml_node::const_iterator paramIter = child->begin();

tests/cpp_tests/build.py

@@ -20,7 +20,8 @@ for cpp_test in glob.glob('*_test.cpp'):
         agg_env = Environment(ENV=os.environ)
         agg_env['CXX'] = env['CXX']
         agg_env['CXXFLAGS'] = env['CXXFLAGS']
-        agg_env.AppendUnique(LIBS='agg')
+        if 'agg' in test_env['LIBS']:
+            agg_env.AppendUnique(LIBS='agg')
         agg_env.Append(CPPPATH = '#deps/agg/include')
         agg_env.Append(LIBPATH = '#deps/agg')
         agg_env['CPPPATH'] = ['#deps/agg/include',env['BOOST_INCLUDES']]

tests/data/good_maps/line_symbolizer_offset.xml

@@ -0,0 +1,18 @@
+<Map minimum-version="2.1.0" background-color="white">
+  <Style name="style">
+    <Rule>
+      <LineSymbolizer offset="2"/>
+      <LineSymbolizer offset="-2"/>
+    </Rule>  
+  </Style>
+  <Layer name="lay">
+    <StyleName>style</StyleName>
+    <Datasource>
+      <Parameter name="type">csv</Parameter>
+      <Parameter name="inline">
+      wkt,name
+      "MULTILINESTRING ((10 10, 20 20, 10 40),(40 40, 30 30, 40 20, 30 10))",line
+      </Parameter>
+    </Datasource>
+  </Layer>
+</Map>