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
|
/*
* Copyright 2012, 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:
* Dalai Felinto
*/
#include "COM_ConvertPremulToKeyOperation.h"
#include "BLI_math.h"
ConvertPremulToKeyOperation::ConvertPremulToKeyOperation() : NodeOperation()
{
this->addInputSocket(COM_DT_COLOR);
this->addOutputSocket(COM_DT_COLOR);
this->m_inputColor = NULL;
}
void ConvertPremulToKeyOperation::initExecution()
{
this->m_inputColor = getInputSocketReader(0);
}
void ConvertPremulToKeyOperation::executePixel(float *outputValue, float x, float y, PixelSampler sampler)
{
float inputValue[4];
float alpha;
this->m_inputColor->read(inputValue, x, y, sampler);
alpha = inputValue[3];
if (fabsf(alpha) < 1e-5f) {
zero_v3(outputValue);
}
else {
mul_v3_v3fl(outputValue, inputValue, 1.0f / alpha);
}
/* never touches the alpha */
outputValue[3] = alpha;
}
void ConvertPremulToKeyOperation::deinitExecution()
{
this->m_inputColor = NULL;
}
|
