In ResampleEffect, precompute the Lanczos function into a table.

[movit] / gamma_expansion_effect.h

diff --git a/gamma_expansion_effect.h b/gamma_expansion_effect.h
index 92f05171cd4d84ff08ad802cbef89138401c5d48..20a5a76fba04315d74f9aa09502eaac3e196e658 100644 (file)
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -9,12 +9,14 @@
 // Note that Movit's internal formats generally do not have enough accuracy
 // for 12-bit input or output.
 
-#include <GL/glew.h>
+#include <epoxy/gl.h>
 #include <string>
 
 #include "effect.h"
 #include "image_format.h"
 
+namespace movit {
+
 class GammaExpansionEffect : public Effect {
 private:
        // Should not be instantiated by end users.
@@ -28,6 +30,7 @@ public:
 
        virtual bool needs_linear_light() const { return false; }
        virtual bool needs_srgb_primaries() const { return false; }
+       virtual bool one_to_one_sampling() const { return true; }
 
        // Actually processes its input in a nonlinear fashion,
        // but does not touch alpha, and we are a special case anyway.
@@ -35,6 +38,9 @@ public:
 
 private:
        GammaCurve source_curve;
+       float uniform_linear_scale, uniform_c0, uniform_c1, uniform_c2, uniform_c3, uniform_c4, uniform_beta;
 };
 
+}  // namespace movit
+
 #endif // !defined(_MOVIT_GAMMA_EXPANSION_EFFECT_H)