From 75788462338b1b4f464d075465da3cb372c40004 Mon Sep 17 00:00:00 2001 From: Carl Hetherington Date: Sat, 27 Dec 2014 20:02:16 +0000 Subject: Change colourspace handling round a bit: - 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. --- src/transfer_function.cc | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 src/transfer_function.cc (limited to 'src/transfer_function.cc') diff --git a/src/transfer_function.cc b/src/transfer_function.cc new file mode 100644 index 00000000..2c7e3e52 --- /dev/null +++ b/src/transfer_function.cc @@ -0,0 +1,46 @@ +/* + Copyright (C) 2012-2014 Carl Hetherington + + 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 "transfer_function.h" +#include + +using std::pow; +using std::map; +using namespace dcp; + +TransferFunction::~TransferFunction () +{ + for (map::const_iterator i = _luts.begin(); i != _luts.end(); ++i) { + delete[] i->second; + } + + _luts.clear (); +} + +float const * +TransferFunction::lut (int bit_depth) const +{ + map::const_iterator i = _luts.find (bit_depth); + if (i != _luts.end ()) { + return i->second; + } + + _luts[bit_depth] = make_lut (bit_depth); + return _luts[bit_depth]; +} -- cgit v1.2.3