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Viewing changes to source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp

  • Committer: Package Import Robot
  • Author(s): Jeremy Bicha
  • Date: 2013-03-06 12:08:47 UTC
  • mfrom: (1.5.1) (14.1.8 experimental)
  • Revision ID: package-import@ubuntu.com-20130306120847-frjfaryb2zrotwcg
Tags: 2.66a-1ubuntu1
https://launchpad.net/bugs/1076930
https://launchpad.net/bugs/1089256
https://launchpad.net/bugs/1052743
https://launchpad.net/bugs/999024
* Resynchronize with Debian (LP: #1076930, #1089256, #1052743, #999024,
  #1122888, #1147084)
* debian/control:
  - Lower build-depends on libavcodec-dev since we're not
    doing the libav9 transition in Ubuntu yet

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source/blender/compositor/operations/COM_AlphaOverMixedOperation.cpp
 
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/*
 
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 * Copyright 2011, Blender Foundation.
 
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 *
 
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 * This program is free software; you can redistribute it and/or
 
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 * modify it under the terms of the GNU General Public License
 
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 * as published by the Free Software Foundation; either version 2
 
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 * of the License, or (at your option) any later version.
 
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 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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 * GNU General Public License for more details.
 
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 *
 
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 * You should have received a copy of the GNU General Public License
 
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 * along with this program; if not, write to the Free Software Foundation,
 
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 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
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 *
 
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 * Contributor: 
 
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 *              Jeroen Bakker 
 
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 *              Monique Dewanchand
 
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 */
 
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#include "COM_AlphaOverMixedOperation.h"
 
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AlphaOverMixedOperation::AlphaOverMixedOperation() : MixBaseOperation()
 
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{
 
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        this->m_x = 0.0f;
 
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}
 
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void AlphaOverMixedOperation::executePixel(float output[4], float x, float y, PixelSampler sampler)
 
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{
 
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        float inputColor1[4];
 
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        float inputOverColor[4];
 
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        float value[4];
 
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        this->m_inputValueOperation->read(value, x, y, sampler);
 
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        this->m_inputColor1Operation->read(inputColor1, x, y, sampler);
 
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        this->m_inputColor2Operation->read(inputOverColor, x, y, sampler);
 
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        if (inputOverColor[3] <= 0.0f) {
 
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                copy_v4_v4(output, inputColor1);
 
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        }
 
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        else if (value[0] == 1.0f && inputOverColor[3] >= 1.0f) {
 
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                copy_v4_v4(output, inputOverColor);
 
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        }
 
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        else {
 
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                float addfac = 1.0f - this->m_x + inputOverColor[3] * this->m_x;
 
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                float premul = value[0] * addfac;
 
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                float mul = 1.0f - value[0] * inputOverColor[3];
 
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                output[0] = (mul * inputColor1[0]) + premul * inputOverColor[0];
 
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                output[1] = (mul * inputColor1[1]) + premul * inputOverColor[1];
 
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                output[2] = (mul * inputColor1[2]) + premul * inputOverColor[2];
 
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                output[3] = (mul * inputColor1[3]) + value[0] * inputOverColor[3];
 
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        }
 
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}
 
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