diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_ColorMatteOperation.cc')
-rw-r--r-- | source/blender/compositor/operations/COM_ColorMatteOperation.cc | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_ColorMatteOperation.cc b/source/blender/compositor/operations/COM_ColorMatteOperation.cc new file mode 100644 index 00000000000..17ada8d89b2 --- /dev/null +++ b/source/blender/compositor/operations/COM_ColorMatteOperation.cc @@ -0,0 +1,81 @@ +/* + * 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_ColorMatteOperation.h" +#include "BLI_math.h" + +ColorMatteOperation::ColorMatteOperation() +{ + addInputSocket(COM_DT_COLOR); + addInputSocket(COM_DT_COLOR); + addOutputSocket(COM_DT_VALUE); + + this->m_inputImageProgram = nullptr; + this->m_inputKeyProgram = nullptr; +} + +void ColorMatteOperation::initExecution() +{ + this->m_inputImageProgram = this->getInputSocketReader(0); + this->m_inputKeyProgram = this->getInputSocketReader(1); +} + +void ColorMatteOperation::deinitExecution() +{ + this->m_inputImageProgram = nullptr; + this->m_inputKeyProgram = nullptr; +} + +void ColorMatteOperation::executePixelSampled(float output[4], + float x, + float y, + PixelSampler sampler) +{ + float inColor[4]; + float inKey[4]; + + const float hue = this->m_settings->t1; + const float sat = this->m_settings->t2; + const float val = this->m_settings->t3; + + float h_wrap; + + this->m_inputImageProgram->readSampled(inColor, x, y, sampler); + this->m_inputKeyProgram->readSampled(inKey, x, y, sampler); + + /* Store matte(alpha) value in [0] to go with + * COM_SetAlphaMultiplyOperation and the Value output. + */ + + if ( + /* do hue last because it needs to wrap, and does some more checks */ + + /* sat */ (fabsf(inColor[1] - inKey[1]) < sat) && + /* val */ (fabsf(inColor[2] - inKey[2]) < val) && + + /* multiply by 2 because it wraps on both sides of the hue, + * otherwise 0.5 would key all hue's */ + + /* hue */ ((h_wrap = 2.0f * fabsf(inColor[0] - inKey[0])) < hue || (2.0f - h_wrap) < hue)) { + output[0] = 0.0f; /* make transparent */ + } + + else { /*pixel is outside key color */ + output[0] = inColor[3]; /* make pixel just as transparent as it was before */ + } +} |