diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp')
-rw-r--r-- | source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp b/source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp new file mode 100644 index 00000000000..7850a631212 --- /dev/null +++ b/source/blender/compositor/operations/COM_LuminanceMatteOperation.cpp @@ -0,0 +1,79 @@ +/* + * 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: + * Dalai Felinto + */ + +#include "COM_LuminanceMatteOperation.h" +#include "BLI_math.h" + +LuminanceMatteOperation::LuminanceMatteOperation(): NodeOperation() { + addInputSocket(COM_DT_COLOR); + addOutputSocket(COM_DT_VALUE); + + inputImageProgram = NULL; +} + +void LuminanceMatteOperation::initExecution() { + this->inputImageProgram = this->getInputSocketReader(0); +} + +void LuminanceMatteOperation::deinitExecution() { + this->inputImageProgram= NULL; +} + +void LuminanceMatteOperation::executePixel(float* outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) { + float inColor[4]; + + const float high=this->settings->t1; + const float low=this->settings->t2; + + float alpha; + + this->inputImageProgram->read(inColor, x, y, sampler, inputBuffers); + + /* one line thread-friend algorithm: + outputValue[0] = max(inputValue[3], min(high, max(low, ((inColor[0]-low)/(high-low)))) + */ + + /* test range*/ + if(inColor[0] > high) { + alpha=1.f; + } + else if(inColor[0] < low){ + alpha=0.f; + } + else {/*blend */ + alpha=(inColor[0]-low)/(high-low); + } + + + /* store matte(alpha) value in [0] to go with + * COM_SetAlphaOperation and the Value output + */ + + /* don't make something that was more transparent less transparent */ + if (alpha<inColor[3]) { + outputValue[0]=alpha; + } + else { + /* leave now it was before */ + outputValue[0]=inColor[3]; + } +} + |