xref: /aosp_15_r20/external/skia/tests/sksl/shared/Clockwise.glsl (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17) 
1*c8dee2aaSAndroid Build Coastguard Worker
2*c8dee2aaSAndroid Build Coastguard Workeruniform vec2 u_skRTFlip;
3*c8dee2aaSAndroid Build Coastguard Workerout vec4 sk_FragColor;
4*c8dee2aaSAndroid Build Coastguard Workervoid main() {
5*c8dee2aaSAndroid Build Coastguard Worker    bool sk_Clockwise = gl_FrontFacing;
6*c8dee2aaSAndroid Build Coastguard Worker    if (u_skRTFlip.y < 0.0) {
7*c8dee2aaSAndroid Build Coastguard Worker        sk_Clockwise = !sk_Clockwise;
8*c8dee2aaSAndroid Build Coastguard Worker    }
9*c8dee2aaSAndroid Build Coastguard Worker    sk_FragColor = vec4(float(sk_Clockwise ? 1 : -1));
10*c8dee2aaSAndroid Build Coastguard Worker}
11