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3e19bd1404
Fixes #8079, where font hinting only sharpens the vertical axis (vertical stems stay blurry), and none of the skrifa knobs were reachable — only switching to `Target::Mono` helped, but that wasn't exposed. This makes the hinting target configurable instead of hardcoding `Target::Smooth { symmetric_rendering: true, preserve_linear_metrics: true }`. ### API - New `epaint::text::HintingTarget` mirroring `skrifa::outline::Target`: - `Mono` - `Smooth(SmoothHinting)` where `SmoothHinting { light, symmetric_rendering, preserve_linear_metrics }` - New field `FontTweak::hinting_target: HintingTarget`. - Each variant/field is documented with what it does and the egui-specific caveats (e.g. `symmetric_rendering` only affects interpreter-hinted fonts; egui positions glyphs from shaper advances so `preserve_linear_metrics` mostly affects sharpness, not layout). ### Render - `font.rs` converts `HintingTarget` → `skrifa::outline::Target` and threads it into the per-glyph `reconfigure` call; the hinting instance is also reconfigured when the target changes. ### UI - The font-tweak settings panel gets a `hinting_target` row: Smooth/Mono radios, `light` / `symmetric_rendering` / `preserve_linear_metrics` checkboxes, and a `Reset` button — all with tooltips. ### Behavior - `HintingTarget::default()` matches egui's previous hardcoded target, so **rendering is unchanged** unless you opt in. To fix the horizontal blur from #8079, uncheck `preserve_linear_metrics` (or pick `Mono`). Whether to flip the *default* is left as a follow-up. 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
GUI implementation
This is the core library crate egui. It is fully platform independent without any backend. You give the egui library input each frame (mouse pos etc), and it outputs a triangle mesh for you to paint.