Jeroen Bakker
9dbea1db66
{D9211} introduced pre-multiplying the color for the keying node. This
pre-multiplication should also be done by other keying nodes and should be
the default operation for alpha node.
This patch will change the logic of keying nodes (Cryptomatte Node,
Channel Matte, Chroma Matte, Color Matte, Difference Matte, Distance
Matte, Luminance Matte) and breaks old files.
The Set alpha node has a mode parameter. This parameter changes
the logic to `Apply Mask` the alpha on the RGBA channels of the input color
or only replace the alpha channel (old behavior).
The replace mode is automatically set for older files. When adding
new files the the multiply mode is set.
Reviewed By: Sergey Sharybin
Differential Revision: https://developer.blender.org/D9630
121 lines
3.2 KiB
C++
121 lines
3.2 KiB
C++
/*
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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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* Copyright 2012, Blender Foundation.
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*/
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#include "COM_ChannelMatteOperation.h"
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#include "BLI_math.h"
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ChannelMatteOperation::ChannelMatteOperation()
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{
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addInputSocket(COM_DT_COLOR);
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addOutputSocket(COM_DT_VALUE);
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this->m_inputImageProgram = nullptr;
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}
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void ChannelMatteOperation::initExecution()
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{
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this->m_inputImageProgram = this->getInputSocketReader(0);
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this->m_limit_range = this->m_limit_max - this->m_limit_min;
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switch (this->m_limit_method) {
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/* SINGLE */
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case 0: {
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/* 123 / RGB / HSV / YUV / YCC */
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const int matte_channel = this->m_matte_channel - 1;
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const int limit_channel = this->m_limit_channel - 1;
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this->m_ids[0] = matte_channel;
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this->m_ids[1] = limit_channel;
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this->m_ids[2] = limit_channel;
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break;
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}
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/* MAX */
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case 1: {
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switch (this->m_matte_channel) {
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case 1: {
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this->m_ids[0] = 0;
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this->m_ids[1] = 1;
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this->m_ids[2] = 2;
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break;
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}
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case 2: {
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this->m_ids[0] = 1;
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this->m_ids[1] = 0;
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this->m_ids[2] = 2;
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break;
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}
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case 3: {
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this->m_ids[0] = 2;
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this->m_ids[1] = 0;
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this->m_ids[2] = 1;
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break;
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}
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default:
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break;
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}
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break;
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}
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default:
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break;
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}
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}
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void ChannelMatteOperation::deinitExecution()
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{
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this->m_inputImageProgram = nullptr;
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}
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void ChannelMatteOperation::executePixelSampled(float output[4],
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float x,
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float y,
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PixelSampler sampler)
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{
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float inColor[4];
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float alpha;
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const float limit_max = this->m_limit_max;
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const float limit_min = this->m_limit_min;
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const float limit_range = this->m_limit_range;
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this->m_inputImageProgram->readSampled(inColor, x, y, sampler);
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/* matte operation */
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alpha = inColor[this->m_ids[0]] - max(inColor[this->m_ids[1]], inColor[this->m_ids[2]]);
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/* flip because 0.0 is transparent, not 1.0 */
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alpha = 1.0f - alpha;
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/* test range */
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if (alpha > limit_max) {
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alpha = inColor[3]; /*whatever it was prior */
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}
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else if (alpha < limit_min) {
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alpha = 0.0f;
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}
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else { /*blend */
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alpha = (alpha - limit_min) / limit_range;
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}
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/* Store matte(alpha) value in [0] to go with
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* COM_SetAlphaMultiplyOperation and the Value output.
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*/
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/* Don't make something that was more transparent less transparent. */
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output[0] = min(alpha, inColor[3]);
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}
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