Gain (vizia)

The gain plugin reimplemented with a Vizia GUI. Same DSP as the built-in gain example, different frontend.

Source: crates/truce-vizia/examples/truce-example-gain-vizia/.

#What it demonstrates

• ViziaEditor with a setup closure receiving &mut Context + ParamLens<P>
• param_knob, param_xy_pad, level_meter widget helpers
• Shared Signal<f32> per param — knob and XY pad bound to the same id stay in sync without extra wiring
• Per-OS screenshot baselines with pixel_threshold(2) on Linux and Windows (rasterizer drift)
• with_stylesheet(widgets::BASE_CSS) for vizia layout shims
• with_font(JETBRAINS_MONO) for cross-backend visual parity

#Layout

Left column: two knobs (Gain, Pan) over a 130×130 Pan/Gain XY pad. Right column: stereo meter spanning the full height. 176×260 logical points, aligned so the XY pad's bottom edge matches the meter's.

#Files

• src/lib.rs — plugin logic, editor wiring, screenshot tests
• src/main.rs — standalone host entry point

#See also

• vizia integration guide
• gain — same plugin with the built-in GUI
• gain-egui — same plugin with egui
• gain-iced — same plugin with iced
• gain-slint — same plugin with slint