For general debugging info see the Fuchsia Debugging Workflow.
Capture the Screen
Take a Screenshot
A screenshot takes a screenshot of what is currently displayed on the Fuchsia device's screen. It returns a 2D buffer.
From the Fuchsia device console, run:
screencap /tmp/filename.ppmFrom your host workstation, run:
fx scp [$(fx get-device-addr)]:/tmp/filename.ppm /tmp/filename.ppmTake a Scenic Snapshot
A Scenic snapshot takes a 3D representation of what is currently displayed on the screen. It usually takes longer to capture than a screenshot, and can be used to visualize issues with layout of 3D content.
From your host workstation, run:
fx shell gltf_export > filename.gltfYou can upload filename.gltf to any gltf viewer, such as this
online viewer.
Dump the SceneGraph as Text
The SceneGraph as text is useful when you want to see all the resources, including non-visible elements such as transform matrices.
Dump the SceneGraph in Fuchsia snapshot
A Fuchsia snapshot contains the SceneGraph that is rendered to the screen. Capture it from your host workstation using the following commands:
fx snapshotunzip <snapshot output file>Then, look for Scenic’s info in the inspect file:
less inspect.jsonDump the SceneGraph and all Scenic resources
To capture all the resources created, including those that are not currently
attached to the main SceneGraph, you can use dump-scenes. From your host
workstation, run the following command:
ffx component explore /core/ui/scenic -c "cat out/debug/dump-scenes"