third_party/skia/resources/sksl/intrinsics/Transpose.sksl

uniform float2x2 testMatrix2x2;
uniform float3x3 testMatrix3x3;
uniform half4 colorGreen, colorRed;

half4 main(float2 coords) {
    float2x3 testMatrix2x3 = float2x3(1, 2, 3, 4, 5, 6);
    const float2x4 testMatrix2x4 = float2x4(1, 2, 3, 4, 5, 6, 7, 8);
    const float3x2 testMatrix3x2 = float3x2(1, 2, 3, 4, 5, 6);
    const float3x4 testMatrix3x4 = float3x4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
    const float4x2 testMatrix4x2 = float4x2(1, 2, 3, 4, 5, 6, 7, 8);
    const float4x3 testMatrix4x3 = float4x3(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
    const float4x4 testMatrix4x4 = float4x4(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);

    return (transpose(testMatrix2x2) == float2x2(1, 3,
                                                 2, 4) &&
            transpose(testMatrix2x3) == float3x2(1, 4,
                                                 2, 5,
                                                 3, 6) &&
            transpose(testMatrix2x4) == float4x2(1, 5,
                                                 2, 6,
                                                 3, 7,
                                                 4, 8) &&
            transpose(testMatrix3x2) == float2x3(1, 3, 5,
                                                 2, 4, 6) &&
            transpose(testMatrix3x3) == float3x3(1, 4, 7,
                                                 2, 5, 8,
                                                 3, 6, 9) &&
            transpose(testMatrix3x4) == float4x3(1, 5, 9,
                                                 2, 6, 10,
                                                 3, 7, 11,
                                                 4, 8, 12) &&
            transpose(testMatrix4x2) == float2x4(1, 3, 5, 7,
                                                 2, 4, 6, 8) &&
            transpose(testMatrix4x3) == float3x4(1, 4, 7, 10,
                                                 2, 5, 8, 11,
                                                 3, 6, 9, 12) &&
            transpose(testMatrix4x4) == float4x4(1, 5,  9, 13,
                                                 2, 6, 10, 14,
                                                 3, 7, 11, 15,
                                                 4, 8, 12, 16)) ? colorGreen : colorRed;
}