zocker-160
commented
4 months ago there are no pointers in Python code so I don't know what to give you heh
Alright so the short answer is, that you simply can't because it is not implemented.
The long answer is, that this code is an afternoon hackjob to get VNC running in a QWidget, so I have currently only implemented the absolute minimum required to be compliant to RFC 6143, which means:
- the protocol version is hard coded to v3.3 https://github.com/zocker-160/pyQVNCWidget/blob/789ebbf7a6ddb71bf7406e1ba108c23a9a419ce7/qvncwidget/rfb.py#L144
- data encoding is hard coded to ENC_RAW with no compression https://github.com/zocker-160/pyQVNCWidget/blob/789ebbf7a6ddb71bf7406e1ba108c23a9a419ce7/qvncwidget/rfb.py#L194
- this code was written to run on a Raspberry Pi so in order to reduce CPU load caused by data conversion, I have also hard coded the data format to RGB32 (QImage and QPainter are fastest when using RGB32 according to QT docs) https://github.com/zocker-160/pyQVNCWidget/blob/789ebbf7a6ddb71bf7406e1ba108c23a9a419ce7/qvncwidget/qvncwidget.py#L71 leading to a fixed, but relatively high package size https://github.com/zocker-160/pyQVNCWidget/blob/789ebbf7a6ddb71bf7406e1ba108c23a9a419ce7/qvncwidget/rfb.py#L327
In order to reduce bandwidth usage, one could use RGB555 or RGB16 instead or implement ENC_TRLE or ENC_ZRLE. Latter would however probably add an external dependency for doing the decompression stuff.
Could you give me a pointer on how to adjust the quality of the transferred data? Best regards!