urce: shaderTextureLodOffsetSrc,
        fShaderSuccess: false,
        passMsg: 'textureLodOffset with non-constant offset is invalid'
    },
    {
        fShaderSource: shaderTextureGradOffsetSrc,
        fShaderSuccess: false,
        passMsg: 'textureGradOffset with non-constant offset is invalid'
    },
    {
        fShaderSource: shaderTextureProjOffsetSrc,
        fShaderSuccess: false,
        passMsg: 'textureProjOffset with non-constant offset is invalid'
    },
    {
        fShaderSource: shad