Emulate glReadPixels of GL_ALPHA.

[movit] / lift_gamma_gain_effect.h

diff --git a/lift_gamma_gain_effect.h b/lift_gamma_gain_effect.h
index 36f6a77370461c2c66b8d6b5e60b11e298c21df4..c93724d8b8fe2ae10150feb4cad8096ebfbce5dc 100644 (file)
--- a/lift_gamma_gain_effect.h
+++ b/lift_gamma_gain_effect.h
@@ -1,5 +1,5 @@
-#ifndef _LIFT_GAMMA_GAIN_EFFECT_H
-#define _LIFT_GAMMA_GAIN_EFFECT_H 1
+#ifndef _MOVIT_LIFT_GAMMA_GAIN_EFFECT_H
+#define _MOVIT_LIFT_GAMMA_GAIN_EFFECT_H 1
 
 // A simple lift/gamma/gain effect, used for color grading.
 //
@@ -20,12 +20,18 @@
 // Also, gamma is a case where we would not want premultiplied alpha.
 // Thus, we have to divide away alpha first, and then re-multiply it back later.
 
+#include <epoxy/gl.h>
+#include <string>
+
 #include "effect.h"
 
+namespace movit {
+
 class LiftGammaGainEffect : public Effect {
 public:
        LiftGammaGainEffect();
        virtual std::string effect_type_id() const { return "LiftGammaGainEffect"; }
+       virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
        std::string output_fragment_shader();
 
        void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
@@ -34,4 +40,6 @@ private:
        RGBTriplet lift, gamma, gain;
 };
 
-#endif // !defined(_LIFT_GAMMA_GAIN_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_LIFT_GAMMA_GAIN_EFFECT_H)