Change colourspace handling round a bit:1.0-colour-cleanup

- move the essence of GammaLUT into TransferFunction and handle
  different bit depths more neatly
- add ColourConversion to describe input gamma correction, colour
  transformation and then output gamma correction in one class.
- add default ColourConversions for sRGB->XYZ, Rec709->XYZ and
  XYZ->RGB.

1 files changed, 0 insertions, 50 deletions

diff --git a/src/gamma_lut.cc b/src/gamma_lut.cc
deleted file mode 100644
index abe35b7c..00000000
--- a/src/gamma_lut.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
-    Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
-
-    This program is free software; you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation; either version 2 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-*/
-
-#include "gamma_lut.h"
-#include "lut_cache.h"
-#include <cmath>
-
-using namespace dcp;
-
-LUTCache<GammaLUT> GammaLUT::cache;
-
-GammaLUT::GammaLUT (int bit_depth, float gamma, bool linearised)
-	: _bit_depth (bit_depth)
-	, _gamma (gamma)
-	, _linearised (linearised)
-{
-	_lut = new float[int(std::pow(2.0f, _bit_depth))];
-	int const bit_length = pow (2, _bit_depth);
-
-	if (_linearised) {
-		for (int i = 0; i < bit_length; ++i) {
-			float const p = static_cast<float> (i) / (bit_length - 1);
-			if (p > 0.04045) {
-				_lut[i] = pow ((p + 0.055) / 1.055, gamma);
-			} else {
-				_lut[i] = p / 12.92;
-			}
-		}
-	} else {
-		for (int i = 0; i < bit_length; ++i) {
-			_lut[i] = pow(float(i) / (bit_length - 1), gamma);
-		}
-	}
-}