Raspberry Pi OpenVG C/C++

Question

I have two question about OpenVG

1. I'm going to plot a chart using OpenVG. I read documentation and I can't find how to write a single pixel (something like putpixel in Pascal). I found one solution: draw a short line (1 pix line) but is not satisfied solution for me.

2. Load PNG file. OpenVG support only jpeg files but jpegs don't have alpha channel. I read *.png by libPNG and I don't know how to cast to vgImage. Have You any idea?

Answer 1

In this project https://github.com/go4shoe/PiAVSignalGenerator I wrapped openVG into a fairly straight forward C++ interface.