From 45625f3116a09d3c8415a54bf8d19fdbb3a3aa9b Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Wed, 13 Mar 2013 16:46:50 +0000
Subject: Compute LUTs at run-time.

---
 src/gamma_lut.cc | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 src/gamma_lut.cc

(limited to 'src/gamma_lut.cc')

diff --git a/src/gamma_lut.cc b/src/gamma_lut.cc
new file mode 100644
index 00000000..acc80af0
--- /dev/null
+++ b/src/gamma_lut.cc
@@ -0,0 +1,16 @@
+#include <cmath>
+#include "gamma_lut.h"
+#include "lut_cache.h"
+
+using namespace libdcp;
+
+LUTCache<GammaLUT> GammaLUT::cache;
+
+GammaLUT::GammaLUT(int bits, float gamma)
+	: LUT<float> (bits, gamma)
+{
+	int const bit_length = pow(2, bits);
+	for (int i = 0; i < bit_length; ++i) {
+		_lut[i] = pow(float(i) / (bit_length - 1), gamma);
+	}
+}
-- 
cgit v1.2.3