For my Radio-astronomy project, I`d like to read from the parallel port. Signals are coming from a 8bit analog/digital converter over the parallelport.
I`d like to read the signal (endless) and print them out on the screen. I mean in a diagramm, with 2 axis. (Time,sec. and Voltage, V... (1 Reply)
My goal is to open a window in the X-server and plot a series of pixels. However, I find many examples I have tried to draw to a window fail and the window remains blank. Therefore, I am here requesting information. I do not know c, and am a beginner. Currently, I am using a mix-match of code,... (1 Reply)
I need to rotate a pixmap in XLib with some kind of interpolation to reduce the aliasing.
I came up with the following code, which uses bilinear interpolation. It works fine: the rotated image looks perfect, but unfortunately it takes 5 or 6 seconds for each rotation. (in a 300x300, 16 colours... (5 Replies)