From cbbb9e63b7ec7a5c34f186ceafe5da6be8faa739 Mon Sep 17 00:00:00 2001 From: Carl Hetherington Date: Thu, 5 May 2022 20:56:14 +0200 Subject: Allow LUTs to be created with a particular range. --- src/identity_transfer_function.cc | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'src/identity_transfer_function.cc') diff --git a/src/identity_transfer_function.cc b/src/identity_transfer_function.cc index c888bd3e..b6f03d07 100644 --- a/src/identity_transfer_function.cc +++ b/src/identity_transfer_function.cc @@ -49,12 +49,13 @@ using namespace dcp; vector -IdentityTransferFunction::make_lut (int bit_depth, bool) const +IdentityTransferFunction::make_lut (double from, double to, int bit_depth, bool) const { int const bit_length = int(std::pow(2.0f, bit_depth)); auto lut = vector(bit_length); for (int i = 0; i < bit_length; ++i) { - lut[i] = double(i) / (bit_length - 1); + double x = double(i) / (bit_length - 1); + lut[i] = (x * (to - from)) + from; } return lut; -- cgit v1.2.3