diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc')
-rw-r--r-- | source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc b/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc new file mode 100644 index 00000000000..934b7e51aee --- /dev/null +++ b/source/blender/compositor/operations/COM_ColorBalanceLGGOperation.cc @@ -0,0 +1,86 @@ +/* + * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Copyright 2011, Blender Foundation. + */ + +#include "COM_ColorBalanceLGGOperation.h" +#include "BLI_math.h" + +inline float colorbalance_lgg(float in, float lift_lgg, float gamma_inv, float gain) +{ + /* 1:1 match with the sequencer with linear/srgb conversions, the conversion isnt pretty + * but best keep it this way, since testing for durian shows a similar calculation + * without lin/srgb conversions gives bad results (over-saturated shadows) with colors + * slightly below 1.0. some correction can be done but it ends up looking bad for shadows or + * lighter tones - campbell */ + float x = (((linearrgb_to_srgb(in) - 1.0f) * lift_lgg) + 1.0f) * gain; + + /* prevent NaN */ + if (x < 0.0f) { + x = 0.0f; + } + + return powf(srgb_to_linearrgb(x), gamma_inv); +} + +ColorBalanceLGGOperation::ColorBalanceLGGOperation() +{ + this->addInputSocket(COM_DT_VALUE); + this->addInputSocket(COM_DT_COLOR); + this->addOutputSocket(COM_DT_COLOR); + this->m_inputValueOperation = nullptr; + this->m_inputColorOperation = nullptr; + this->setResolutionInputSocketIndex(1); +} + +void ColorBalanceLGGOperation::initExecution() +{ + this->m_inputValueOperation = this->getInputSocketReader(0); + this->m_inputColorOperation = this->getInputSocketReader(1); +} + +void ColorBalanceLGGOperation::executePixelSampled(float output[4], + float x, + float y, + PixelSampler sampler) +{ + float inputColor[4]; + float value[4]; + + this->m_inputValueOperation->readSampled(value, x, y, sampler); + this->m_inputColorOperation->readSampled(inputColor, x, y, sampler); + + float fac = value[0]; + fac = MIN2(1.0f, fac); + const float mfac = 1.0f - fac; + + output[0] = mfac * inputColor[0] + + fac * colorbalance_lgg( + inputColor[0], this->m_lift[0], this->m_gamma_inv[0], this->m_gain[0]); + output[1] = mfac * inputColor[1] + + fac * colorbalance_lgg( + inputColor[1], this->m_lift[1], this->m_gamma_inv[1], this->m_gain[1]); + output[2] = mfac * inputColor[2] + + fac * colorbalance_lgg( + inputColor[2], this->m_lift[2], this->m_gamma_inv[2], this->m_gain[2]); + output[3] = inputColor[3]; +} + +void ColorBalanceLGGOperation::deinitExecution() +{ + this->m_inputValueOperation = nullptr; + this->m_inputColorOperation = nullptr; +} |