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#![warn(clippy::all)]
#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")] // hide console window on Windows in release
use egui::Widget;
use log::{debug, error};
use strum::VariantArray;
use crate::palette::DynamicPalette;
use crate::state::{LutAlgorithm, UiState};
use crate::worker::{BackendEvent, LutAlgorithmArgs, Worker, WorkerHandle};
mod palette;
mod state;
mod worker;
pub struct App {
state: UiState,
worker: WorkerHandle,
}
impl App {
pub fn new(cc: &eframe::CreationContext<'_>) -> Self {
egui_extras::install_image_loaders(&cc.egui_ctx);
cc.egui_ctx.set_visuals(egui::Visuals {
dark_mode: true,
// bg
window_fill: egui::Color32::from_rgb(0x16, 0x16, 0x16),
code_bg_color: egui::Color32::from_rgb(0x0b, 0x0b, 0x0b),
faint_bg_color: egui::Color32::from_rgb(0x26, 0x26, 0x26),
extreme_bg_color: egui::Color32::from_rgb(0x39, 0x39, 0x39),
// fg
override_text_color: Some(egui::Color32::from_rgb(0xf4, 0xf4, 0xf4)),
hyperlink_color: egui::Color32::from_rgb(0x45, 0x89, 0xff),
warn_fg_color: egui::Color32::from_rgb(0xfd, 0xdc, 0x69),
error_fg_color: egui::Color32::from_rgb(0xfa, 0x4d, 0x56),
..Default::default()
});
// Load previous app state (if any).
let state = cc
.storage
.and_then(|storage| eframe::get_value::<UiState>(storage, eframe::APP_KEY))
.unwrap_or_default();
// Spawn background worker thread
let worker = Worker::spawn(cc.egui_ctx.clone());
let this = Self { state, worker };
// Load last opened image and apply settings
if let Some(path) = &this.state.current_image {
this.worker.load_file(path);
this.apply();
}
this
}
/// Handle any incoming events from the backend
fn poll_worker_events(&mut self, ctx: &egui::Context) {
if let Some(event) = self.worker.poll_event() {
self.state.last_event = event.to_string();
debug!("{}", self.state.last_event);
match event {
BackendEvent::Error(e) => {
error!("{e}");
},
BackendEvent::PickFile(path_buf, _) => {
self.state.current_image = Some(path_buf);
},
BackendEvent::SetImage(image, width, height, uri) => {
let ci = egui::ColorImage::from_rgba_unmultiplied(
[height as usize, width as usize],
&image,
);
let texture = ctx.load_texture(uri, ci, egui::TextureOptions::default());
self.state.image_texture = Some(texture);
},
_ => {},
}
}
}
/// Get the currently set lut arguments for worker requests
fn apply(&self) {
let args = match self.state.current_alg {
LutAlgorithm::GaussianRbf => LutAlgorithmArgs::GaussianRbf {
rbf: self.state.common_rbf,
args: self.state.guassian_rbf,
},
LutAlgorithm::ShepardsMethod => LutAlgorithmArgs::ShepardsMethod {
rbf: self.state.common_rbf,
args: self.state.shepards_method,
},
LutAlgorithm::GaussianSampling => LutAlgorithmArgs::GaussianSampling {
args: self.state.guassian_sampling,
},
LutAlgorithm::NearestNeighbor => LutAlgorithmArgs::NearestNeighbor,
};
self.worker
.apply_palette(self.state.palette.clone(), self.state.common, args);
}
}
impl eframe::App for App {
/// Called by the frame work to save state before shutdown.
fn save(&mut self, storage: &mut dyn eframe::Storage) {
eframe::set_value(storage, eframe::APP_KEY, &self.state)
}
/// Called each time the UI needs repainting, which may be many times per second.
fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
self.poll_worker_events(ctx);
egui::TopBottomPanel::top("top_panel").show(ctx, |ui| {
egui::menu::bar(ui, |ui| {
ui.label("Lutgen Studio");
ui.add_space(5.);
ui.menu_button("File", |ui| {
if ui.button("Open").clicked() {
self.worker.pick_file();
}
if ui.button("Save As").clicked() {
self.worker.save_as();
}
if ui.button("Quit").clicked() {
ctx.send_viewport_cmd(egui::ViewportCommand::Close);
}
});
ui.with_layout(egui::Layout::right_to_left(egui::Align::Center), |ui| {
egui::widgets::global_theme_preference_buttons(ui);
});
});
});
// side panel for lut args
egui::SidePanel::left("args")
.resizable(false)
.show(ctx, |ui| {
egui::ScrollArea::vertical().show(ui, |ui| {
ui.horizontal_wrapped(|ui| {
ui.label("Palette:");
egui::ComboBox::from_id_salt("palette")
.width(150.)
.selected_text(format!("{}", self.state.palette_selection))
.show_ui(ui, |ui| {
let val = ui.selectable_value(
&mut self.state.palette_selection,
palette::DynamicPalette::Custom,
"- custom -",
);
val.gained_focus()
.then(|| ui.scroll_to_cursor(Some(egui::Align::Center)));
for p in lutgen_palettes::Palette::VARIANTS {
let val = ui.selectable_value(
&mut self.state.palette_selection,
palette::DynamicPalette::Builtin(*p),
p.to_string(),
);
val.clicked().then(|| {
self.state.palette =
self.state.palette_selection.get().to_vec();
self.apply()
});
val.gained_focus()
.then(|| ui.scroll_to_cursor(Some(egui::Align::Center)));
}
});
});
ui.group(|ui| {
ui.horizontal_wrapped(|ui| {
let mut res = Vec::new();
for color in self.state.palette.iter_mut() {
res.push(egui::widgets::color_picker::color_edit_button_srgb(
ui, color,
));
}
for (i, res) in res.iter().enumerate() {
if res.changed() {
self.state.palette_selection = DynamicPalette::Custom;
self.apply();
}
if res.secondary_clicked() {
self.state.palette.remove(i);
self.state.palette_selection = DynamicPalette::Custom;
self.apply();
}
}
if egui::Button::new("+")
.min_size(egui::vec2(40., 0.))
.ui(ui)
.clicked()
{
self.state.palette.push([0u8; 3]);
};
});
});
ui.separator();
egui::ComboBox::from_id_salt("algorithm")
.width(200.)
.selected_text(format!("{:?}", self.state.current_alg))
.show_ui(ui, |ui| {
for alg in LutAlgorithm::VARIANTS {
let val = ui.selectable_value(
&mut self.state.current_alg,
*alg,
alg.to_string(),
);
val.clicked().then(|| self.apply());
val.gained_focus()
.then(|| ui.scroll_to_cursor(Some(egui::Align::Center)));
}
});
ui.group(|ui| {
ui.heading("Common Arguments");
ui.add_space(10.);
ui.label("Hald-Clut Level");
let res = ui.add(egui::Slider::new(&mut self.state.common.level, 4..=16));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
ui.label("Luminosity Factor");
let res = ui.add(egui::Slider::new(
&mut self.state.common.lum_factor.0,
0.0001..=2.,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
match self.state.current_alg {
LutAlgorithm::GaussianRbf | LutAlgorithm::ShepardsMethod => {
ui.separator();
ui.heading("Rbf Arguments");
ui.add_space(10.);
ui.toggle_value(
&mut self.state.common_rbf.preserve,
"Preserve Luminosity",
)
.changed()
.then(|| self.apply());
ui.label("Nearest Colors");
let res = ui.add(
egui::Slider::new(&mut self.state.common_rbf.nearest, 0..=32)
.step_by(1.),
);
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
},
_ => {},
}
match self.state.current_alg {
LutAlgorithm::GaussianRbf => {
ui.separator();
ui.heading("Gaussian Arguments");
ui.add_space(10.);
ui.label("Shape");
let res = ui.add(egui::Slider::new(
&mut self.state.guassian_rbf.shape.0,
0.0001..=512.,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
},
LutAlgorithm::ShepardsMethod => {
ui.separator();
ui.heading("Shepard's Method Arguments");
ui.add_space(10.);
ui.label("Power");
let res = ui.add(egui::Slider::new(
&mut self.state.shepards_method.power.0,
0.0001..=512.,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
},
LutAlgorithm::GaussianSampling => {
ui.separator();
ui.heading("Guassian Sampling Arguments");
ui.add_space(10.);
ui.label("Mean");
let res = ui.add(egui::Slider::new(
&mut self.state.guassian_sampling.mean.0,
-128.0..=128.,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
ui.label("Standard Deviation");
let res = ui.add(egui::Slider::new(
&mut self.state.guassian_sampling.std_dev.0,
1.0..=128.,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
ui.label("Iterations");
let res = ui.add(egui::Slider::new(
&mut self.state.guassian_sampling.iterations,
1..=1024,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
ui.label("RNG Seed");
let res = ui.add(egui::Slider::new(
&mut self.state.guassian_sampling.seed,
0..=u64::MAX,
));
if res.drag_stopped() || res.lost_focus() {
self.apply()
}
},
_ => {},
}
});
});
});
// statusline with events and other info
egui::TopBottomPanel::bottom("statusline").show(ctx, |ui| {
ui.label(&self.state.last_event);
});
// main app panel
egui::CentralPanel::default().show(ctx, |ui| {
// current image
ui.vertical_centered(|ui| {
let available_size = ui.available_size();
let rect = if let Some(texture) = &self.state.image_texture {
ui.add(
egui::Image::from_texture(texture)
.max_size(available_size)
.fit_to_exact_size(available_size)
.corner_radius(10.0),
)
.rect
} else {
let (rect, _response) =
ui.allocate_exact_size(available_size, egui::Sense::hover());
ui.painter().text(
rect.center(),
egui::Align2::CENTER_CENTER,
"No image loaded",
egui::FontId::default(),
egui::Color32::GRAY,
);
rect
};
// paint border
ui.painter().rect_stroke(
rect,
10.0,
egui::Stroke::new(1.0, egui::Color32::GRAY),
egui::StrokeKind::Middle,
);
});
ui.with_layout(egui::Layout::bottom_up(egui::Align::RIGHT), |ui| {
egui::warn_if_debug_build(ui);
});
});
}
}
fn main() -> eframe::Result {
env_logger::init();
let native_options = eframe::NativeOptions {
viewport: egui::ViewportBuilder::default()
.with_inner_size([400.0, 300.0])
.with_min_inner_size([300.0, 220.0])
.with_icon(
eframe::icon_data::from_png_bytes(&include_bytes!("../assets/logo.png")[..])
.expect("Failed to load icon"),
),
persist_window: true,
centered: true,
..Default::default()
};
eframe::run_native(
"lutgen-studio",
native_options,
Box::new(|cc| Ok(Box::new(App::new(cc)))),
)
}