diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_DifferenceMatteOperation.cpp')
-rw-r--r-- | source/blender/compositor/operations/COM_DifferenceMatteOperation.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_DifferenceMatteOperation.cpp b/source/blender/compositor/operations/COM_DifferenceMatteOperation.cpp new file mode 100644 index 00000000000..628daa7c775 --- /dev/null +++ b/source/blender/compositor/operations/COM_DifferenceMatteOperation.cpp @@ -0,0 +1,88 @@ +/* + * Copyright 2011, Blender Foundation. + * + * 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. + * + * Contributor: + * Jeroen Bakker + * Monique Dewanchand + */ + +#include "COM_DifferenceMatteOperation.h" +#include "BLI_math.h" + +DifferenceMatteOperation::DifferenceMatteOperation(): NodeOperation() +{ + addInputSocket(COM_DT_COLOR); + addInputSocket(COM_DT_COLOR); + addOutputSocket(COM_DT_VALUE); + + inputImage1Program = NULL; + inputImage2Program = NULL; +} + +void DifferenceMatteOperation::initExecution() +{ + this->inputImage1Program = this->getInputSocketReader(0); + this->inputImage2Program = this->getInputSocketReader(1); +} +void DifferenceMatteOperation::deinitExecution() +{ + this->inputImage1Program = NULL; + this->inputImage2Program = NULL; +} + +void DifferenceMatteOperation::executePixel(float *outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) +{ + float inColor1[4]; + float inColor2[4]; + + const float tolerence=this->settings->t1; + const float falloff=this->settings->t2; + float difference; + float alpha; + + this->inputImage1Program->read(inColor1, x, y, sampler, inputBuffers); + this->inputImage2Program->read(inColor2, x, y, sampler, inputBuffers); + + difference = (fabs(inColor2[0] - inColor1[0]) + + fabs(inColor2[1] - inColor1[1]) + + fabs(inColor2[2] - inColor1[2])); + + /*average together the distances*/ + difference=difference/3.0; + + /*make 100% transparent*/ + if (difference < tolerence) { + outputValue[0]=0.0; + } + /*in the falloff region, make partially transparent */ + else if (difference < falloff+tolerence) { + difference=difference-tolerence; + alpha=difference/falloff; + /*only change if more transparent than before */ + if (alpha < inColor1[3]) { + outputValue[0]=alpha; + } + else { /* leave as before */ + outputValue[0]=inColor1[3]; + } + } + else { + /*foreground object*/ + outputValue[0] = inColor1[3]; + } +} + |