I have a simple Xlib program that displays a PNG file without a border or title bar on the X display. I need to display the image dead center on the screen and about 50-100 pixels to the right. How do I display the image twice and how do I control the location of the two images? This is a Raspbian Stretch default install I'm running, not Lite. What window manager am I using? Is there a way to do a black background and no window manager at all? When the Pi is hooked to a projector, the projector should not be displaying a background picture or anything else on the standard desktop. The C program should have the mouse and keyboard locked out. How do I return control to X if the program crashes so I don't have to power down the Pi and power it back up without a proper reboot? I need to do a release on exit or something similar. I'm working on a demo program before I tackle the larger program which I can't discuss in detail. Gotta learn how to draw in X.
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