Feature request: implement plot_ptr gdb command that displays images from raw pointers

[brunoalr]

From csantosbh/gdb-imagewatch#42
brunoalr commented on Jul 19, 2018

I imagine the following use case:
The image is represented by a raw buffer pointer "buffer_ptr", a stride "stride" and a height "height", then the command will be something like
plot_ptr(buffer_ptr, stride, height)