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
|
#version 330 core
in vec2 TexCoords;
uniform sampler2D mask;
uniform vec3 textColor;
uniform vec3 bgColor;
// SRC = SRC_ALPHA; DST = 1 - SRC_ALPHA
void MyBlend(in vec3 srcValue,
in vec3 dstValue,
in vec3 srcAlpha,
out vec3 blended)
{
vec3 dstAlpha = vec3(1.0, 1.0, 1.0) - srcAlpha;
vec3 preBlended = (srcValue * srcAlpha + dstValue * dstAlpha);
blended = vec3(min(1.0, preBlended.x),
min(1.0, preBlended.y),
min(1.0, preBlended.z));
}
void main()
{
// vec4 red = vec4(sampled.rgb, sampled.r * sampled.g * sampled.b);
// vec4 sampled = vec4(1.0, 1.0, 1.0, texture(mask, TexCoords));
vec3 blended = vec3(1.0, 1.0, 1.0);
MyBlend(textColor, bgColor, texture(mask, TexCoords).rgb, blended);
gl_FragColor = vec4(blended, 1.0);
}
|
