diff options
Diffstat (limited to 'source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp')
-rw-r--r-- | source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp b/source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp new file mode 100644 index 00000000000..9deb00ae71a --- /dev/null +++ b/source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp @@ -0,0 +1,61 @@ +/* + * 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_AlphaOverMixedOperation.h" + +AlphaOverMixedOperation::AlphaOverMixedOperation(): MixBaseOperation() { + this->x = 0.0f; +} + +void AlphaOverMixedOperation::executePixel(float* outputValue, float x, float y, PixelSampler sampler, MemoryBuffer *inputBuffers[]) { + float inputColor1[4]; + float inputOverColor[4]; + float value[4]; + + inputValueOperation->read(value, x, y, sampler, inputBuffers); + inputColor1Operation->read(inputColor1, x, y, sampler, inputBuffers); + inputColor2Operation->read(inputOverColor, x, y, sampler, inputBuffers); + + if(inputOverColor[3]<=0.0f) { + outputValue[0] = inputColor1[0]; + outputValue[1] = inputColor1[1]; + outputValue[2] = inputColor1[2]; + outputValue[3] = inputColor1[3]; + } + else if(value[0]==1.0f && inputOverColor[3]>=1.0f) { + outputValue[0] = inputOverColor[0]; + outputValue[1] = inputOverColor[1]; + outputValue[2] = inputOverColor[2]; + outputValue[3] = inputOverColor[3]; + } + else { + float addfac= 1.0f - this->x + inputOverColor[3]*this->x; + float premul= value[0]*addfac; + float mul= 1.0f - value[0]*inputOverColor[3]; + + outputValue[0]= (mul*inputColor1[0]) + premul*inputOverColor[0]; + outputValue[1]= (mul*inputColor1[1]) + premul*inputOverColor[1]; + outputValue[2]= (mul*inputColor1[2]) + premul*inputOverColor[2]; + outputValue[3]= (mul*inputColor1[3]) + value[0]*inputOverColor[3]; + } +} + |