diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_DifferenceMatteOperation.cc')
-rw-r--r-- | source/blender/compositor/operations/COM_DifferenceMatteOperation.cc | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_DifferenceMatteOperation.cc b/source/blender/compositor/operations/COM_DifferenceMatteOperation.cc new file mode 100644 index 00000000000..cca99a42c0c --- /dev/null +++ b/source/blender/compositor/operations/COM_DifferenceMatteOperation.cc @@ -0,0 +1,85 @@ +/* + * 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_DifferenceMatteOperation.h" +#include "BLI_math.h" + +DifferenceMatteOperation::DifferenceMatteOperation() +{ + addInputSocket(COM_DT_COLOR); + addInputSocket(COM_DT_COLOR); + addOutputSocket(COM_DT_VALUE); + + this->m_inputImage1Program = nullptr; + this->m_inputImage2Program = nullptr; +} + +void DifferenceMatteOperation::initExecution() +{ + this->m_inputImage1Program = this->getInputSocketReader(0); + this->m_inputImage2Program = this->getInputSocketReader(1); +} +void DifferenceMatteOperation::deinitExecution() +{ + this->m_inputImage1Program = nullptr; + this->m_inputImage2Program = nullptr; +} + +void DifferenceMatteOperation::executePixelSampled(float output[4], + float x, + float y, + PixelSampler sampler) +{ + float inColor1[4]; + float inColor2[4]; + + const float tolerance = this->m_settings->t1; + const float falloff = this->m_settings->t2; + float difference; + float alpha; + + this->m_inputImage1Program->readSampled(inColor1, x, y, sampler); + this->m_inputImage2Program->readSampled(inColor2, x, y, sampler); + + difference = (fabsf(inColor2[0] - inColor1[0]) + fabsf(inColor2[1] - inColor1[1]) + + fabsf(inColor2[2] - inColor1[2])); + + /* average together the distances */ + difference = difference / 3.0f; + + /* make 100% transparent */ + if (difference <= tolerance) { + output[0] = 0.0f; + } + /*in the falloff region, make partially transparent */ + else if (difference <= falloff + tolerance) { + difference = difference - tolerance; + alpha = difference / falloff; + /*only change if more transparent than before */ + if (alpha < inColor1[3]) { + output[0] = alpha; + } + else { /* leave as before */ + output[0] = inColor1[3]; + } + } + else { + /* foreground object */ + output[0] = inColor1[3]; + } +} |