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#version 440
layout(location = 0) in vec2 qt_TexCoord0;
layout(location = 0) out vec4 fragColor;
layout(binding = 1) uniform sampler2D source;
void main() {
lowp vec4 c = texture(source, qt_TexCoord0);
lowp float level = c.r * 0.3 + c.g * 0.59 + c.b * 0.11;
fragColor = vec4(level, level, level, c.a);
}