Allow the Mapnik rendering buffer size to be altered via the config file.

diff --git a/src/mapnik_interface.cpp b/src/mapnik_interface.cpp
index 463af6200bb63257e13f960c7b4bc7d95deed052..502ccaf8541c1cac62c7a9a0551cc4e6386aa620 100644 (file)
--- a/src/mapnik_interface.cpp
+++ b/src/mapnik_interface.cpp
@@ -39,6 +39,7 @@
 
 #include "mapnik_interface.h"
 #include "globals.h"
+#include "settings.h"
 
 #if MAPNIK_VERSION < 200000
 #include <mapnik/envelope.hpp>
@@ -120,6 +121,8 @@ void mapnik_interface_initialize (const char *plugins_dir, const char* font_dir,
        }
 }
 
+#define VIK_SETTINGS_MAPNIK_BUFFER_SIZE "mapnik_buffer_size"
+
 /**
  * mapnik_interface_load_map_file:
  *
@@ -144,7 +147,12 @@ gchar* mapnik_interface_load_map_file ( MapnikInterface* mi,
                // Only set buffer size if the buffer size isn't explicitly set in the mapnik stylesheet.
                // Alternatively render a bigger 'virtual' tile and then only use the appropriate subset
                if (mi->myMap->buffer_size() == 0) {
-                       mi->myMap->set_buffer_size((width+height/4)); // e.g. 128 for a 256x256 image.
+                       gint buffer_size = (width+height/4); // e.g. 128 for a 256x256 image.
+                       gint tmp;
+                       if ( a_settings_get_integer ( VIK_SETTINGS_MAPNIK_BUFFER_SIZE, &tmp ) )
+                               buffer_size = tmp;
+
+                       mi->myMap->set_buffer_size(buffer_size);
                }
 
                g_debug ("%s layers: %d", __FUNCTION__, mi->myMap->layer_count() );