diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_DistanceRGBMatteOperation.cc')
-rw-r--r-- | source/blender/compositor/operations/COM_DistanceRGBMatteOperation.cc | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.cc b/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.cc new file mode 100644 index 00000000000..ecc2fc2e85f --- /dev/null +++ b/source/blender/compositor/operations/COM_DistanceRGBMatteOperation.cc @@ -0,0 +1,92 @@ +/* + * 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_DistanceRGBMatteOperation.h" +#include "BLI_math.h" + +DistanceRGBMatteOperation::DistanceRGBMatteOperation() +{ + this->addInputSocket(COM_DT_COLOR); + this->addInputSocket(COM_DT_COLOR); + this->addOutputSocket(COM_DT_VALUE); + + this->m_inputImageProgram = nullptr; + this->m_inputKeyProgram = nullptr; +} + +void DistanceRGBMatteOperation::initExecution() +{ + this->m_inputImageProgram = this->getInputSocketReader(0); + this->m_inputKeyProgram = this->getInputSocketReader(1); +} + +void DistanceRGBMatteOperation::deinitExecution() +{ + this->m_inputImageProgram = nullptr; + this->m_inputKeyProgram = nullptr; +} + +float DistanceRGBMatteOperation::calculateDistance(float key[4], float image[4]) +{ + return len_v3v3(key, image); +} + +void DistanceRGBMatteOperation::executePixelSampled(float output[4], + float x, + float y, + PixelSampler sampler) +{ + float inKey[4]; + float inImage[4]; + + const float tolerance = this->m_settings->t1; + const float falloff = this->m_settings->t2; + + float distance; + float alpha; + + this->m_inputKeyProgram->readSampled(inKey, x, y, sampler); + this->m_inputImageProgram->readSampled(inImage, x, y, sampler); + + distance = this->calculateDistance(inKey, inImage); + + /* Store matte(alpha) value in [0] to go with + * COM_SetAlphaMultiplyOperation and the Value output. + */ + + /*make 100% transparent */ + if (distance < tolerance) { + output[0] = 0.0f; + } + /*in the falloff region, make partially transparent */ + else if (distance < falloff + tolerance) { + distance = distance - tolerance; + alpha = distance / falloff; + /*only change if more transparent than before */ + if (alpha < inImage[3]) { + output[0] = alpha; + } + else { /* leave as before */ + output[0] = inImage[3]; + } + } + else { + /* leave as before */ + output[0] = inImage[3]; + } +} |