Introduce a per component cache in the renderer #466
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At the moment the scene manager completely recalculates everything on every update. This is really expensive, especially for the labels where text shaping is apparently a pretty slow process. We want to do a lot more caching to improve the performance. Here we introduce a per component cache where each component can cache whatever it needs to. We used to globally store icons in the scene manager to cache them, but now these move into the individual component caches. Text shaping is still done on each frame, but it's now possible to start moving these into the component caches in further pull requests.
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Nov 14, 2021
- Runs now support custom variables that are key value pairs that either the user can specify in the run editor or are provided by a script like an auto splitter. [#201](#201) - There is now an option in the run editor to generate a comparison based on a user specified goal time. This uses the same algorithm as the `Balanced PB` comparison but with the time specified instead of the personal best. [#209](#209) - Images internally are now stored as is without being reencoded as Base64 which was done before in order to make it easier for the web LiveSplit One to display them. [#227](#227) - The Splits.io API is now available under the optional `networking` feature. [#236](#236) - All key value based components share the same component state type now. [#257](#257) - The crate now properly supports `wasm-bindgen` and `WASI`. [#263](#263) - There is now a dedicated component for displaying the comparison's segment time. [#264](#264) - Compiling the crate without `std` is now supported. Most features are not supported at this time though. [#270](#270) - [`Splitterino`](https://github.com/prefixaut/splitterino) splits can now be parsed. [#276](#276) - The `Timer` component can now show a segment timer instead. [#288](#288) - Gamepads are now supported on the web. [#310](#310) - The underlying "skill curve" that the `Balanced PB` samples is now exposed in the API. [#330](#330) - The layout states can now be updated, which means almost all of the allocations can be reused from the previous frame. This is a lot faster. [#334](#334) - In order to calculate a layout state, the timer now provides a snapshot mechanism that ensures that the layout state gets calculated at a fixed point in time. [#339](#339) - Text shaping is now done via `rustybuzz` which is a port of `harfbuzz`. [#378](#378) - Custom fonts are now supported. [#385](#385) - The renderer is not based on meshes anymore that are suitable for rendering with a 3D graphics API. Instead the renderer is now based on paths, which are suitable for rendering with a 2D graphics API such as Direct2D, Skia, HTML Canvas, and many more. The software renderer is now based on `tiny-skia` which is so fast that it actually outperforms any other rendering and is the recommended way to render. [#408](#408) - Remove support for parsing `worstrun` splits. `worstrun` doesn't support splits anymore, so `livesplit-core` doesn't need to keep its parsing support. [#411](#411) - Remove support for parsing `Llanfair 2` splits. `Llanfair 2` was never publicly available and is now deleted entirely. [#420](#420) - Hotkeys are now supported on macOS. [#422](#422) - The renderer is now based on two layers. A bottom layer that rarely needs to be rerendered and the top layer that needs to be rerendered on every frame. Additionally the renderer is now a scene manager which manages a scene that an actual rendering backend can then render out. [#430](#430) - The hotkeys are now based on the [UI Events KeyboardEvent code Values](https://www.w3.org/TR/uievents-code/) web standard. [#440](#440) - Timing is now based on `CLOCK_BOOTTIME` on Linux and `CLOCK_MONOTONIC` on macOS and iOS. This ensures that all platforms keep tracking time while the operating system is in a suspended state. [#445](#445) - Segment time columns are now formatted as segment times. [#448](#448) - Hotkeys can now be resolved to the US keyboard layout. [#452](#452) - They hotkeys are now based on `keydown` instead of `keypress` in the web. `keydown` handles all keys whereas `keypress` only handles visual keys and is also deprecated. [#455](#455) - Hotkeys can now be resolved to the user's keyboard layout on both Windows and macOS. [#459](#459) and [#460](#460) - The `time` crate is now used instead of `chrono` for keeping track of time. [#462](#462) - The scene manager now caches a lot more information. This improves the performance a lot as it does not need to reshape the text on every frame anymore, which is a very expensive operation. [#466](#466) and [#467](#467) - The hotkeys on Linux are now based on `evdev`, which means Wayland is now supported. Additionally the hotkeys are not consuming the key press anymore. [#474](#474) - When holding down a key, the hotkey doesn't repeat anymore on Linux, macOS and WebAssembly. The problem still occurs on Windows at this time. [#475](#475) and [#476](#476)
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At the moment the scene manager completely recalculates everything on every update. This is really expensive, especially for the labels where text shaping is apparently a pretty slow process. We want to do a lot more caching to improve the performance. Here we introduce a per component cache where each component can cache whatever it needs to. We used to globally store icons in the scene manager to cache them, but now these move into the individual component caches. Text shaping is still done on each frame, but it's now possible to start moving these into the component caches in further pull requests.
Works towards #432 and #431