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
|
#version 150 core
uniform sampler2D original;
uniform sampler2D source1;
uniform sampler2D source2;
uniform sampler2D source3;
uniform sampler2D source4;
uniform sampler2D source5;
uniform float weight1;
uniform float weight2;
uniform float weight3;
uniform float weight4;
uniform float weight5;
uniform vec4 color;
uniform float spread;
uniform float qt_Opacity;
in vec2 qt_TexCoord0;
out vec4 fragColor;
float linearstep(float e0, float e1, float x) {
return clamp((x - e0) / (e1 - e0), 0.0, 1.0);
}
void main() {
vec4 shadowColor = texture(source1, qt_TexCoord0) * weight1;
shadowColor += texture(source2, qt_TexCoord0) * weight2;
shadowColor += texture(source3, qt_TexCoord0) * weight3;
shadowColor += texture(source4, qt_TexCoord0) * weight4;
shadowColor += texture(source5, qt_TexCoord0) * weight5;
vec4 originalColor = texture(original, qt_TexCoord0);
shadowColor.rgb = mix(originalColor.rgb, color.rgb * originalColor.a, linearstep(0.0, spread, shadowColor.a));
fragColor = vec4(shadowColor.rgb, originalColor.a) * originalColor.a * qt_Opacity;
}
|
