rm-hull / luma.core
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perf: optimize viewport to skip redundant refreshes (#300)

* perf: optimize viewport to skip redundant refreshes

Introduces a `_dirty` flag and an optional `force` parameter to the
`viewport.refresh` method. This ensures that the underlying device's
`display` method is only invoked when content has actually changed,
reducing unnecessary I/O and CPU usage.

Changes include:
- Tracking a `_dirty` state when hotspots are removed.
- Adding a `force` flag to `refresh()` to allow explicit overrides.
- Updating `display()` and `set_position()` to trigger a forced
  refresh.
- Skipping the `device.display()` call if no redraw is required and no
  state changes are detected.

```mermaid
sequenceDiagram
    participant App
    participant Viewport
    participant Hotspot
    participant Device

    App->>Viewport: refresh(force)
    Viewport->>Hotspot: should_redraw()
    Hotspot-->>Viewport: redraw_needed

    alt force or redraw_needed or dirty
        Viewport->>Device: display(image)
        Note over Viewport: Set dirty = False
    else no changes
        Note over Viewport: Skip display update
    end
```

Fixes #280

* fscking whitespace

* chore: enable colored output in CI logs

Set environment variables to force colored output for tools and disable
the interactive `tox` spinner. This improves the readability and
cleanliness of the GitHub Actions logs.

* Revert "chore: enable colored output in CI logs"

This reverts commit f2d5e4c2d.

11 of 11 new or added lines in 1 file covered. (100.0%)

1683 of 1697 relevant lines covered (99.18%)

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Recent builds

Builds Branch Commit Type Ran Committer Via Coverage
22732671561 main perf: optimize viewport to skip redundant refreshes (#300) * perf: optimize viewport to skip redundant refreshes Introduces a `_dirty` flag and an optional `force` parameter to the `viewport.refresh` method. This ensures that the underlying devi... push web-flow github
99.18
21569920925 main ci: cache lg build (#301) * ci: fix build * ci: cache lg.zip * Refactor lg library installation in workflow push web-flow github
99.17
21568959315 main doc: use virtual environment for installation (#299) * doc: use virtual environment for installation Added instructions for installing the package directly from PyPi, including creating and activating a virtual environment. * fix branch Update... push web-flow github
99.17
21568000764 main doc: fix badges (#298) * doc: fix badges * ci: update readthedocs deps --------- Co-authored-by: Richard Hull <rm_hull@yahoo.co.uk> push web-flow github
99.17
21567840027 main chore: add dependabot configuration (#297) Automate dependency updates for **pip** and **GitHub Actions**. This ensures the project stays up-to-date with security patches and new releases on a weekly schedule. push web-flow github
99.17
21566427079 main Drop support for Python 3.8 (#296) * drop support for Python 3.8 * add py3.14 * fix heading push web-flow github
99.17
20283967038 main chore: Prepare release 2.5.3 and add device support Release version 2.5.3, incorporating new device drivers and minor internal improvements. * Add support for AiP31068 and PCA9633. * Update dummy device to pass arbitrary serial interface to ... push rm-hull github
99.17
20269897976 main Added gradual brightness & color transitions to PCA9633 backlight (#295) * Added gradual brightness & color transitions * Fixed successive color updates with amber missing then present --------- Co-authored-by: Richard Hull <rm_hull@yahoo.co.uk> push web-flow github
99.17
20235531159 main Updated dummy device to pass arbitrary serial interface to super (#294) push web-flow github
99.4
20150978363 main Added support for AiP31068 and PCA9633 (#292) * Added support for AiP31068 and PCA9633 * Fixed amber color channel if set to 0 * Fixed spaces and indentation * Added unit tests * A few more tests * Fix pca9633 tests * Flake8 formatting * R... push web-flow github
99.4
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