Fix a bug where intermediate phase outputs could get too low height.

[movit] / gamma_expansion_effect.h

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index b93848a70a9d04175098695c4606ed0c4d0a2a60..043731baf15ef48c8812d1ec6fb6e5234a5b87a3 100644 (file)
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -13,14 +13,22 @@
 #define EXPANSION_CURVE_SIZE 256
 
 class GammaExpansionEffect : public Effect {
-public:
+private:
+       // Should not be instantiated by end users.
        GammaExpansionEffect();
+       friend class EffectChain;
+
+public:
        virtual std::string effect_type_id() const { return "GammaExpansionEffect"; }
        std::string output_fragment_shader();
 
        virtual bool needs_linear_light() const { return false; }
        virtual bool needs_srgb_primaries() const { return false; }
 
+       // Actually processes its input in a nonlinear fashion,
+       // but does not touch alpha, and we are a special case anyway.
+       virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+
 private:
        GammaCurve source_curve;
        float expansion_curve[EXPANSION_CURVE_SIZE];