GRAPHIC SHADERS TESTING FOR USE IN ON BOARD VISUALISATION SYSTEM OF CIVIL AIRCRAFT

The software package of a modern civil aircraft operates under the control of a real-time operating system (RTOS). This technology is critical from the point of view of safety and must be certified for use. An integral part of the RTOS is the graphics component. Existing aviation applications use graphics shaders that are to be compiled before execution. But a shader compiler written in C++ cannot be certified. Therefore, we propose an approach in which the compiler is not used in the on-board software. It compiles shaders in advance, and during operation they are loaded as a binary software object. Thus, certification of the shader compiler was replaced by testing the software object created by it. We developed a hardware and software complex designed to test the compiler, independent of a specific target platform. Based on the analysis of aviation applications, a set of tests was developed that allows you to check the correctness of all shader operations used in civil aviation applications. Thus, we have found and successfully implemented a practical solution to the problem of the impossibility of certifying the shader compiler, which made it possible to include shaders in the certified software of the onboard equipment of a civil aircraft.