Dots Per Inch (aka Pixels Per Inch)
Deprecated: This function used to set a global default DPI. However, it only worked if it was called before any [class@Rsvg.Handle] objects had been created; it would not work after that. To avoid global mutable state, please use [method@Rsvg.Handle.set_dpi] instead.
2.8
Do not use this function. Create an [class@Rsvg.Handle] and call [method@Rsvg.Handle.set_dpi] on it instead.