1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/*
* 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_GammaOperation.h"
#include "BLI_math.h"
namespace blender::compositor {
GammaOperation::GammaOperation()
{
this->addInputSocket(DataType::Color);
this->addInputSocket(DataType::Value);
this->addOutputSocket(DataType::Color);
this->m_inputProgram = nullptr;
this->m_inputGammaProgram = nullptr;
}
void GammaOperation::initExecution()
{
this->m_inputProgram = this->getInputSocketReader(0);
this->m_inputGammaProgram = this->getInputSocketReader(1);
}
void GammaOperation::executePixelSampled(float output[4], float x, float y, PixelSampler sampler)
{
float inputValue[4];
float inputGamma[4];
this->m_inputProgram->readSampled(inputValue, x, y, sampler);
this->m_inputGammaProgram->readSampled(inputGamma, x, y, sampler);
const float gamma = inputGamma[0];
/* check for negative to avoid nan's */
output[0] = inputValue[0] > 0.0f ? powf(inputValue[0], gamma) : inputValue[0];
output[1] = inputValue[1] > 0.0f ? powf(inputValue[1], gamma) : inputValue[1];
output[2] = inputValue[2] > 0.0f ? powf(inputValue[2], gamma) : inputValue[2];
output[3] = inputValue[3];
}
void GammaOperation::deinitExecution()
{
this->m_inputProgram = nullptr;
this->m_inputGammaProgram = nullptr;
}
} // namespace blender::compositor
|
