third_party/skia_next/third_party/skia/tests/sksl/blend/BlendXor.glsl

#version 400
out vec4 sk_FragColor;
uniform vec4 src;
uniform vec4 dst;
void main() {
    sk_FragColor = (1.0 - dst.w) * src + (1.0 - src.w) * dst;
}