diff options
Diffstat (limited to 'src/gamma_transfer_function.cc')
| -rw-r--r-- | src/gamma_transfer_function.cc | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/gamma_transfer_function.cc b/src/gamma_transfer_function.cc index 1875221e..33513b78 100644 --- a/src/gamma_transfer_function.cc +++ b/src/gamma_transfer_function.cc @@ -55,13 +55,14 @@ GammaTransferFunction::GammaTransferFunction (double gamma) double * -GammaTransferFunction::make_lut (int bit_depth, bool inverse) const +GammaTransferFunction::make_lut (double from, double to, int bit_depth, bool inverse) const { int const bit_length = int(std::pow(2.0f, bit_depth)); auto lut = new double[bit_length]; double const gamma = inverse ? (1 / _gamma) : _gamma; for (int i = 0; i < bit_length; ++i) { - lut[i] = pow(double(i) / (bit_length - 1), gamma); + double const x = double(i) / (bit_length - 1); + lut[i] = pow((x * (to - from)) + from, gamma); } return lut; |