diff options
author | Jeroen Bakker <jeroen@blender.org> | 2021-03-08 15:41:52 +0300 |
---|---|---|
committer | Jeroen Bakker <jeroen@blender.org> | 2021-03-08 15:41:52 +0300 |
commit | 1775ea74c152ba7cf27a8bc1f071b40992c89013 (patch) | |
tree | 310fbe4e107734a16b3164adb1a65bd918935855 /source/blender/compositor/operations/COM_BrightnessOperation.cc | |
parent | b9cd2f4531ca670c196b0b14b1359d0f375103c2 (diff) |
Cleanup: Change extension .cpp to .cc
Diffstat (limited to 'source/blender/compositor/operations/COM_BrightnessOperation.cc')
-rw-r--r-- | source/blender/compositor/operations/COM_BrightnessOperation.cc | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_BrightnessOperation.cc b/source/blender/compositor/operations/COM_BrightnessOperation.cc new file mode 100644 index 00000000000..3ae1b4aaef4 --- /dev/null +++ b/source/blender/compositor/operations/COM_BrightnessOperation.cc @@ -0,0 +1,91 @@ +/* + * 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_BrightnessOperation.h" + +BrightnessOperation::BrightnessOperation() +{ + this->addInputSocket(COM_DT_COLOR); + this->addInputSocket(COM_DT_VALUE); + this->addInputSocket(COM_DT_VALUE); + this->addOutputSocket(COM_DT_COLOR); + this->m_inputProgram = nullptr; + this->m_use_premultiply = false; +} + +void BrightnessOperation::setUsePremultiply(bool use_premultiply) +{ + this->m_use_premultiply = use_premultiply; +} + +void BrightnessOperation::initExecution() +{ + this->m_inputProgram = this->getInputSocketReader(0); + this->m_inputBrightnessProgram = this->getInputSocketReader(1); + this->m_inputContrastProgram = this->getInputSocketReader(2); +} + +void BrightnessOperation::executePixelSampled(float output[4], + float x, + float y, + PixelSampler sampler) +{ + float inputValue[4]; + float a, b; + float inputBrightness[4]; + float inputContrast[4]; + this->m_inputProgram->readSampled(inputValue, x, y, sampler); + this->m_inputBrightnessProgram->readSampled(inputBrightness, x, y, sampler); + this->m_inputContrastProgram->readSampled(inputContrast, x, y, sampler); + float brightness = inputBrightness[0]; + float contrast = inputContrast[0]; + brightness /= 100.0f; + float delta = contrast / 200.0f; + /* + * The algorithm is by Werner D. Streidt + * (http://visca.com/ffactory/archives/5-99/msg00021.html) + * Extracted of OpenCV demhist.c + */ + if (contrast > 0) { + a = 1.0f - delta * 2.0f; + a = 1.0f / max_ff(a, FLT_EPSILON); + b = a * (brightness - delta); + } + else { + delta *= -1; + a = max_ff(1.0f - delta * 2.0f, 0.0f); + b = a * brightness + delta; + } + if (this->m_use_premultiply) { + premul_to_straight_v4(inputValue); + } + output[0] = a * inputValue[0] + b; + output[1] = a * inputValue[1] + b; + output[2] = a * inputValue[2] + b; + output[3] = inputValue[3]; + if (this->m_use_premultiply) { + straight_to_premul_v4(output); + } +} + +void BrightnessOperation::deinitExecution() +{ + this->m_inputProgram = nullptr; + this->m_inputBrightnessProgram = nullptr; + this->m_inputContrastProgram = nullptr; +} |