Fix an issue where temporary textures could be reused too early by a different thread.

[movit] / alpha_multiplication_effect.h

diff --git a/alpha_multiplication_effect.h b/alpha_multiplication_effect.h
index 2425a427e2764822287f3f54443fb5f896e61f32..50333cbcf7b42f87b346c19a253f3d6babc6aa1d 100644 (file)
--- a/alpha_multiplication_effect.h
+++ b/alpha_multiplication_effect.h
@@ -1,5 +1,5 @@
-#ifndef _ALPHA_MULTIPLICATION_EFFECT_H
-#define _ALPHA_MULTIPLICATION_EFFECT_H 1
+#ifndef _MOVIT_ALPHA_MULTIPLICATION_EFFECT_H
+#define _MOVIT_ALPHA_MULTIPLICATION_EFFECT_H 1
 
 // Convert postmultiplied alpha to premultiplied alpha, simply by multiplying.
 
@@ -7,11 +7,16 @@
 
 #include "effect.h"
 
+namespace movit {
+
 class AlphaMultiplicationEffect : public Effect {
 public:
        AlphaMultiplicationEffect() {}
-       virtual std::string effect_type_id() const { return "AlphaMultiplicationEffect"; }
-       std::string output_fragment_shader();
+       std::string effect_type_id() const override { return "AlphaMultiplicationEffect"; }
+       std::string output_fragment_shader() override;
+       bool strong_one_to_one_sampling() const override { return true; }
 };
 
-#endif // !defined(_ALPHA_MULTIPLICATION_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_ALPHA_MULTIPLICATION_EFFECT_H)