Various fixes to XYZ/RGB transforms.

1 files changed, 9 insertions, 4 deletions

diff --git a/src/transfer_function.h b/src/transfer_function.h
index 31a794e2..16d00c1a 100644
--- a/src/transfer_function.h
+++ b/src/transfer_function.h
@@ -29,17 +29,22 @@ namespace dcp {
 class TransferFunction : public boost::noncopyable
 {
 public:
+	TransferFunction (bool inverse);
+	
 	virtual ~TransferFunction ();
 
-	float const * lut (int bit_depth) const;
+	/** @return A look-up table (of size 2^bit_depth) whose values range from 0 to 1 */
+	double const * lut (int bit_depth) const;
 
-	virtual bool about_equal (boost::shared_ptr<const TransferFunction> other, float epsilon) const = 0;
+	virtual bool about_equal (boost::shared_ptr<const TransferFunction> other, double epsilon) const;
 
 protected:
-	virtual float * make_lut (int bit_depth) const = 0;
+	virtual double * make_lut (int bit_depth) const = 0;
+
+	bool _inverse;
 
 private:	
-	mutable std::map<int, float*> _luts;
+	mutable std::map<int, double*> _luts;
 };
 
 }