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 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_AlphaOverKeyOperation.h"
AlphaOverKeyOperation::AlphaOverKeyOperation(): MixBaseOperation()
{
}
void AlphaOverKeyOperation::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 premul = value[0]*inputOverColor[3];
float mul = 1.0f - premul;
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];
}
}
|
