Calculate the RGB-to-XYZ matrix ourselves instead of using a “magic” one from Wikipedia.

[movit] / colorspace_conversion_effect.h

diff --git a/colorspace_conversion_effect.h b/colorspace_conversion_effect.h
index 8e691c438ad6c8f6a1f52766c278774fb1d57b2b..b21f72e1a8b6b8782e332aedfaca2455d3f9644b 100644 (file)
--- a/colorspace_conversion_effect.h
+++ b/colorspace_conversion_effect.h
@@ -9,6 +9,7 @@
 // will simply stay out-of-gamut, and probably clip in the output stage.
 
 #include <string>
+#include <Eigen/Core>
 
 #include "effect.h"
 #include "image_format.h"
@@ -26,6 +27,9 @@ public:
        virtual bool needs_srgb_primaries() const { return false; }
        virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
 
+       // Get a conversion matrix from the given color space to XYZ.
+       static Eigen::Matrix3d get_xyz_matrix(Colorspace space);
+
 private:
        Colorspace source_space, destination_space;
 };