Allow custom flags for blending.

diff --git a/naja/resources/mutators.py b/naja/resources/mutators.py
index 36ef2297671d7cc5382d93d6f68430eea163faf3..e3fc67a0c011805b3f51d56d704948daf6faa791 100644 (file)
--- a/naja/resources/mutators.py
+++ b/naja/resources/mutators.py
@@ -41,18 +41,18 @@ def scale_multiplier(image, factor):
     return scale(image, size)
 
 
-def blend_add(image, colour):
+def blend_add(image, colour, flags=pgl.BLEND_ADD):
     """Overlay the image with the given colour using BLEND_ADD"""
     blend = surface.Surface(image.get_size())
     blend.fill(colour)
     # We return a copy
     blended_image = image.copy()
-    blended_image.blit(blend, (0, 0), special_flags=pgl.BLEND_ADD)
+    blended_image.blit(blend, (0, 0), special_flags=flags)
     return blended_image
 
 
-def blender(colour):
-    return Mutator(blend_add, tuple(colour))
+def blender(colour, flags=pgl.BLEND_ADD):
+    return Mutator(blend_add, tuple(colour), flags)
 
 
 # Identity mutator