Emulate glReadPixels of GL_ALPHA.

[movit] / gamma_expansion_effect.h

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index e4a94b379c3960bacb3612db1742b3156c56b763..81f42d137392cf7e0c08ba557f3a3d090f708f7f 100644 (file)
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -6,13 +6,16 @@
 // of the processing chain.
 //
 // Currently supports sRGB, Rec. 601/709 and Rec. 2020 (10- and 12-bit).
+// Note that Movit's internal formats generally do not have enough accuracy
+// for 12-bit input or output.
 
+#include <epoxy/gl.h>
 #include <string>
 
 #include "effect.h"
 #include "image_format.h"
 
-#define EXPANSION_CURVE_SIZE 256
+namespace movit {
 
 class GammaExpansionEffect : public Effect {
 private:
@@ -23,6 +26,7 @@ private:
 public:
        virtual std::string effect_type_id() const { return "GammaExpansionEffect"; }
        std::string output_fragment_shader();
+       virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
 
        virtual bool needs_linear_light() const { return false; }
        virtual bool needs_srgb_primaries() const { return false; }
@@ -33,7 +37,8 @@ public:
 
 private:
        GammaCurve source_curve;
-       float expansion_curve[EXPANSION_CURVE_SIZE];
 };
 
+}  // namespace movit
+
 #endif // !defined(_MOVIT_GAMMA_EXPANSION_EFFECT_H)