X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=alpha_division_effect.h;h=2fd90820615269edad7a7655030c69d57ea01398;hp=e700112fb2a909c108c2ddb48ccbb3b96d5ab0ed;hb=f216b7bef5a968c89f6fc78e83cc26a91e504a8a;hpb=caa05550e868db406e4b54e69d60b5573f59cb60

diff --git a/alpha_division_effect.h b/alpha_division_effect.h
index e700112..2fd9082 100644
--- a/alpha_division_effect.h
+++ b/alpha_division_effect.h
@@ -1,15 +1,22 @@
-#ifndef _ALPHA_DIVISION_EFFECT_H
-#define _ALPHA_DIVISION_EFFECT_H 1
+#ifndef _MOVIT_ALPHA_DIVISION_EFFECT_H
+#define _MOVIT_ALPHA_DIVISION_EFFECT_H 1
 
-// Convert premultiplied alpha to postmultiplied alpha, simply by multiplying.
+// Convert postmultiplied alpha to premultiplied alpha, simply by dividing.
+
+#include <string>
 
 #include "effect.h"
 
+namespace movit {
+
 class AlphaDivisionEffect : public Effect {
 public:
 	AlphaDivisionEffect() {}
 	virtual std::string effect_type_id() const { return "AlphaDivisionEffect"; }
 	std::string output_fragment_shader();
+	virtual bool one_to_one_sampling() const { return true; }
 };
 
-#endif // !defined(_ALPHA_DIVISION_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_ALPHA_DIVISION_EFFECT_H)