Image Depth
Usage
Simply specify which pixel bit depth you want to use when starting a
session, ie:
xpra start --pixel-depth=30
Support
- seamless mode (aka
xpra start
) supports bit depths 16,24 and 30
- desktop mode (aka
start-desktop
) supports 8,16,24 and 30
- the native client
xpra attach
supports 16,24,30,48
Testing that high bit depth is actually in use can be tricky, for
that the xpra toolbox
provides a test application.
Limitations
- the operating system and display must be configured for deep colour
support
- transparency is supported in 24-bit mode, which is in effect a
32-bit mode
- with versions older than 4.1, 30-bit rendering is only supported in
the opengl enabled client, and only
the
rgb
encoding will preserve high bit depth
- 16-bit mode has no real native encoders and so the pixels are often
upsampled to 24-bit before compression which is wasteful
- 8-bit mode is not optimized at all
- see also DPI
Feature links