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
|
#version 330 core
in vec2 texCoord;
uniform sampler2DMS texLeft;
uniform sampler2DMS texRight;
uniform int stereoMode;
out vec4 fragColor;
void main()
{
ivec2 tc = ivec2(floor(textureSize(texLeft) * texCoord));
vec4 cLeft = vec4(0.0);
vec4 cRight = vec4(0.0);
// Fetch from correct texture
if (stereoMode == 1) {
if (texCoord.y > 0.5)
cLeft = texelFetch(texLeft, tc, 0) + texelFetch(texLeft, tc, 1);
else
cRight = texelFetch(texRight, tc, 0) + texelFetch(texRight, tc, 1);
} else if (stereoMode == 2) {
if (texCoord.x < 0.5)
cLeft = texelFetch(texLeft, tc, 0) + texelFetch(texLeft, tc, 1);
else
cRight = texelFetch(texRight, tc, 0) + texelFetch(texRight, tc, 1);
} else {
cLeft = texelFetch(texLeft, tc, 0) + texelFetch(texLeft, tc, 1);
cRight = texelFetch(texRight, tc, 0) + texelFetch(texRight, tc, 1);
}
cLeft /= 2.0;
cRight /= 2.0;
// This discard, while not necessarily ideal for some GPUs, is necessary to
// get correct results with certain layer blend modes for example.
if (cLeft.a == 0.0 && cRight.a == 0.0)
discard;
if (stereoMode == 3) {
cLeft.g = 0.0;
cLeft.b = 0.0;
cRight.r = 0.0;
} else if (stereoMode == 4) {
cLeft.r = 0.0;
cLeft.b = 0.0;
cRight.g = 0.0;
}
fragColor = cLeft + cRight;
}
|
