## Summary
Add support for Classifier-Free Guidance with FLUX.
- Using CFG doubles the time for the denoising process. Running both the
positive and negative conditioning in a single batch is left for future
work, because most users are already VRAM-constrained (this would
probably be faster at the cost of higher peak VRAM).
- Negative text conditioning is optional and only required if `cfg_scale
!= 1.0`
- CFG is skipped if `cfg_scale == 1.0` (i.e. no compute overhead in this
case)
- `cfg_scale_start_step` and `cfg_scale_end_step` can be used to easily
control the range of steps that CFG is applied for.
- CFG is a prerequisite for IP-Adapter support.
## Example
Positive Caption: `Professional photography of a luxury hotel in the
Nevada desert`
CFG: 1.0
Positive Caption: `Professional photography of a luxury hotel in the
Nevada desert`
Negative Caption: `Swimming pool`
CFG: 2.0
Same seed
## QA Instructions
- [ ] Test interactions with ControlNet
- [ ] Verify that peak RAM/VRAM utilization has not increased
significantly
- [ ] Test that CFG is skipped when cfg_scale == 1.0
- [ ] Test that negative text conditioning can be omitted when cfg_scale
== 1.0
- [ ] Test that a clear error message is returned when negative text
conditioning is omitted when cfg_scale != 1.0
- [ ] Test that the negative text prompt gets applied when cfg_scale
>1.0
- [ ] Test that a collection of cfg_scale values can be provided for
per-step control.
- [ ] Test that `cfg_scale_start_step` and `cfg_scale_end_step` control
the range of steps that CFG is applied
## Checklist
- [x] _The PR has a short but descriptive title, suitable for a
changelog_
- [x] _Tests added / updated (if applicable)_
- [x] _Documentation added / updated (if applicable)_
Introduce two-stage logging configuration and overrides for enabled status, log level and log namespaces.
The first stage in `<InvokeAIUI />`, before we set up redux (and therefore before we have access to the user's configured logging setup). In this stage, we use the overrides or default values.
The second stage is in `<App />`, after we set up redux, via `useSyncLoggingConfig`. In this stage, we use the overrides or the user's configured logging setup. This hook also handles pushing changes made by the user into localstorage.
Other changes:
- Extract logging config to util function
- Remove the `useEffect` from `SettingsModal` that was changing the logging settings
- Remove extraneous log effects from `useLogger`
- Export new `LoggingOverrides` type
While troubleshooting an issue with this middleware, I found the inclusion of the nextState and diff to be very noisy. It's now a function that accepts some options to configure the output, and returns the middleware.
