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 81f42d137392cf7e0c08ba557f3a3d090f708f7f..20a5a76fba04315d74f9aa09502eaac3e196e658 100644 (file)
--- a/gamma_expansion_effect.h
+++ b/gamma_expansion_effect.h
@@ -30,6 +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.
@@ -37,6 +38,7 @@ public:
 
 private:
        GammaCurve source_curve;
+       float uniform_linear_scale, uniform_c0, uniform_c1, uniform_c2, uniform_c3, uniform_c4, uniform_beta;
 };
 
 }  // namespace movit