Alpha blending

I added a new sink with component-name=OMX.Nvidia.render.hdmi.overlay.argb8888 to libgstomx and can display a png on the overlay the problem is how to enable the alpha belnding on the displaycontroler. According to the Tegra K1 Tecnical Reference Manaul 21.3.10 an alpha blending of display windows is possible but requires configuration of the corresponding registers. The question is how to achieve this either in gstreamer, open max il or via the video driver? The only references to alpha blending seem to be for the VIC.

The question is how to achieve this either in gstreamer, open max il or via the video driver?

This is not supported in our platform.

laurenz - not sure how much you could expose about what you are doing. Is this a project related to building a product or personal programming exercise?

Would you be able to use GStreamer software stack for your implementation?