winZoom it works similar to hyprland zoom but with typecursor follow

.gitignore

@@ -9,10 +9,3 @@ target/
 
 # MSVC Windows builds of rustc generate these, which store debugging information
 *.pdb
-
-# RustRover
-#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
-#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
-#  and can be added to the global gitignore or merged into this file.  For a more nuclear
-#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/

Cargo.toml

@@ -1,55 +1,36 @@
 [package]
-name = "rs-pictures"
+name = "iwaku"
 version = "0.1.0"
 edition = "2024"
 
 [[bin]]
-name = "rs-pictures"
+name = "iwaku"
 path = "src/main.rs"
 
 [dependencies]
-# Wayland-native screen capture
-libwayshot = "0.7"
-
-# GUI framework (Wayland only)
-eframe = { version = "0.29", default-features = false, features = ["wayland", "wgpu"] }
-egui = "0.29"
-
-# Image handling
-image = { version = "0.25", features = ["png", "jpeg"] }
-
-# 2D rendering for effects (rounded corners, drop shadow)
-tiny-skia = "0.11"
-
-# Clipboard (Wayland)
-arboard = { version = "3.6", features = ["wayland-data-control"] }
-
-# Config serialization
-serde = { version = "1", features = ["derive"] }
-toml = "0.8"
-
-# Platform config/data directories
-directories = "5"
-
-# Error handling
-anyhow = "1"
-
-# Timestamp-based filenames
-chrono = { version = "0.4", features = ["clock"] }
-
-# ── Build profiles ────────────────────────────────────────────────────────────
+windows = { version = "0.58", features = [
+    "Win32_Foundation",
+    "Win32_Graphics_Gdi",
+    "Win32_System_Com",
+    "Win32_System_LibraryLoader",
+    "Win32_System_Ole",
+    "Win32_UI_Accessibility",
+    "Win32_UI_HiDpi",
+    "Win32_UI_Input_KeyboardAndMouse",
+    "Win32_UI_Magnification",
+    "Win32_UI_Shell",
+    "Win32_UI_WindowsAndMessaging",
+] }
+tray-icon = "0.17"
 
 [profile.release]
 opt-level = 3
-lto = "thin"          # link-time optimisation across crates
-codegen-units = 1     # better inlining at the cost of compile time
-strip = true          # strip debug symbols → smaller binary
+lto = "thin"
+codegen-units = 1
+strip = true
 
-# Dev builds are slow for pixel-processing code. This gives opt-level 2
-# to our own crate only while keeping dependencies at their default (opt=3
-# they already compiled with), so incremental rebuilds stay fast.
 [profile.dev]
 opt-level = 0
 
 [profile.dev.package."*"]
-opt-level = 3         # all deps at full optimisation even in dev mode
+opt-level = 3

_ul

@@ -0,0 +1 @@
+/usr/bin/bash: line 1: del: command not found

src/capture.rs

@@ -1,53 +0,0 @@
-use anyhow::{Context, Result};
-use image::RgbaImage;
-use libwayshot::WayshotConnection;
-
-/// A rectangular region on screen in physical pixels.
-#[derive(Debug, Clone, Copy)]
-pub struct Region {
-    pub x: i32,
-    pub y: i32,
-    pub width: u32,
-    pub height: u32,
-}
-
-/// Captures the specified region in physical pixels.
-pub fn capture_region(region: Region) -> Result<RgbaImage> {
-    let full = capture_all_outputs()?;
-
-    let px = (region.x.max(0) as u32).min(full.width().saturating_sub(1));
-    let py = (region.y.max(0) as u32).min(full.height().saturating_sub(1));
-    let pw = region.width.min(full.width() - px);
-    let ph = region.height.min(full.height() - py);
-
-    eprintln!(
-        "[capture] crop ({px},{py}) {pw}x{ph} from {}x{}",
-        full.width(), full.height(),
-    );
-
-    Ok(image::imageops::crop_imm(&full, px, py, pw, ph).to_image())
-}
-
-/// Captures all connected outputs stitched together into one image.
-pub fn capture_all_outputs() -> Result<RgbaImage> {
-    let conn = WayshotConnection::new()
-        .context("Failed to connect to Wayland display")?;
-
-    let all = conn.get_all_outputs();
-    eprintln!("[capture] outputs: {:?}", all.iter().map(|o| &o.name).collect::<Vec<_>>());
-
-    let active_name = crate::hyprland::active_monitor_name();
-    let target_output = if let Some(ref name) = active_name {
-        all.iter().find(|o| &o.name == name).unwrap_or(&all[0])
-    } else {
-        &all[0]
-    };
-
-    let rgba = conn
-        .screenshot_single_output(target_output, false)
-        .context("libwayshot failed to capture output")?
-        .into_rgba8();
-
-    eprintln!("[capture] capture_all_outputs → {}x{}", rgba.width(), rgba.height());
-    Ok(rgba)
-}

src/caret.rs

@@ -0,0 +1,121 @@
+use std::cell::RefCell;
+
+use windows::Win32::Foundation::{HWND, POINT};
+use windows::Win32::Graphics::Gdi::ClientToScreen;
+use windows::Win32::System::Com::SAFEARRAY;
+use windows::Win32::System::Com::{CoCreateInstance, CLSCTX_INPROC_SERVER};
+use windows::Win32::System::Ole::{SafeArrayGetElement, SafeArrayGetLBound, SafeArrayGetUBound};
+use windows::Win32::UI::Accessibility::{
+    CUIAutomation, IUIAutomation, IUIAutomationElement, IUIAutomationTextPattern, UIA_TextPatternId,
+};
+use windows::Win32::UI::WindowsAndMessaging::{
+    GetForegroundWindow, GetGUIThreadInfo, GetWindowThreadProcessId, GUITHREADINFO,
+};
+
+thread_local! {
+    static AUTOMATION: RefCell<Option<IUIAutomation>> = RefCell::new(None);
+}
+
+fn get_automation() -> Option<IUIAutomation> {
+    AUTOMATION.with(|cell| {
+        let mut borrow = cell.borrow_mut();
+        if borrow.is_none() {
+            unsafe {
+                *borrow = CoCreateInstance(&CUIAutomation, None, CLSCTX_INPROC_SERVER).ok();
+            }
+        }
+        borrow.clone()
+    })
+}
+
+pub fn get_caret_pos() -> Option<POINT> {
+    // 1. Win32 GUI-thread caret — fast, no COM. Works for classic edit controls,
+    //    Notepad, Office dialogs, conhost-based terminals, etc.
+    if let Some(pt) = get_caret_via_gui_thread() {
+        return Some(pt);
+    }
+    // 2. UI Automation — works for Word, modern browsers, WPF, UWP apps.
+    get_caret_via_uia()
+}
+
+fn get_caret_via_gui_thread() -> Option<POINT> {
+    unsafe {
+        let hwnd: HWND = GetForegroundWindow();
+        if hwnd.0.is_null() {
+            return None;
+        }
+        let thread_id = GetWindowThreadProcessId(hwnd, None);
+        let mut gti = GUITHREADINFO {
+            cbSize: std::mem::size_of::<GUITHREADINFO>() as u32,
+            ..Default::default()
+        };
+        GetGUIThreadInfo(thread_id, &mut gti).ok()?;
+        if gti.hwndCaret.0.is_null() {
+            return None;
+        }
+        let mut pt = POINT {
+            x: gti.rcCaret.left,
+            y: gti.rcCaret.bottom,
+        };
+        let _ = ClientToScreen(gti.hwndCaret, &mut pt);
+        Some(pt)
+    }
+}
+
+fn get_caret_via_uia() -> Option<POINT> {
+    unsafe {
+        let automation = get_automation()?;
+        let element = automation.GetFocusedElement().ok()?;
+
+        // Try the focused element and walk up to 6 ancestors.
+        // Some apps expose TextPattern on a parent rather than the focused leaf.
+        let mut current: Option<IUIAutomationElement> = Some(element);
+        for _ in 0..7 {
+            let el = current.as_ref()?;
+            if let Some(sa) = try_text_pattern(el) {
+                return point_from_safearray(sa);
+            }
+            current = automation
+                .ControlViewWalker()
+                .ok()
+                .and_then(|w| w.GetParentElement(el).ok());
+        }
+        None
+    }
+}
+
+unsafe fn try_text_pattern(el: &IUIAutomationElement) -> Option<*mut SAFEARRAY> {
+    unsafe {
+        let pattern = el
+            .GetCurrentPatternAs::<IUIAutomationTextPattern>(UIA_TextPatternId)
+            .ok()?;
+        let ranges = pattern.GetSelection().ok()?;
+        if ranges.Length().ok()? == 0 {
+            return None;
+        }
+        ranges.GetElement(0).ok()?.GetBoundingRectangles().ok()
+    }
+}
+
+unsafe fn point_from_safearray(sa: *mut SAFEARRAY) -> Option<POINT> {
+    unsafe {
+        if sa.is_null() {
+            return None;
+        }
+        let lb = SafeArrayGetLBound(sa, 1).ok()?;
+        let ub = SafeArrayGetUBound(sa, 1).ok()?;
+        if ub - lb < 3 {
+            return None;
+        }
+        let mut left: f64 = 0.0;
+        let mut top: f64 = 0.0;
+        let mut idx0 = lb;
+        let mut idx1 = lb + 1;
+        SafeArrayGetElement(sa, &mut idx0, &mut left as *mut f64 as *mut _).ok()?;
+        SafeArrayGetElement(sa, &mut idx1, &mut top as *mut f64 as *mut _).ok()?;
+        Some(POINT {
+            x: left as i32,
+            y: top as i32,
+        })
+    }
+}

src/config.rs

@@ -1,163 +0,0 @@
-use anyhow::{Context, Result};
-use directories::ProjectDirs;
-use serde::{Deserialize, Serialize};
-use std::path::PathBuf;
-
-/// Top-level application configuration.
-/// Serialized to/from ~/.config/rs-pictures/config.toml
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct Config {
-    /// Directory where screenshots are saved.
-    pub save_directory: PathBuf,
-
-    /// File format for saved screenshots: "png" or "jpeg".
-    pub save_format: String,
-
-    /// Filename template. Supports strftime-style tokens via chrono.
-    /// Example: "screenshot_%Y-%m-%d_%H-%M-%S"
-    pub filename_template: String,
-
-    /// When true, automatically save to disk after capture without opening
-    /// the review window.
-    #[serde(default)]
-    pub auto_save: bool,
-
-    /// When true, automatically copy to the clipboard after capture without
-    /// opening the review window.
-    #[serde(default)]
-    pub auto_copy: bool,
-
-    /// Milliseconds to wait after launch before capturing the desktop snapshot.
-    /// Increase this if the overlay background still shows the terminal/launcher
-    /// that started rs-pictures. Default: 200.
-    #[serde(default = "default_capture_delay_ms")]
-    pub capture_delay_ms: u64,
-
-    /// If true, the selection overlay will be transparent (live preview) instead of
-    /// a frozen screenshot. The final capture happens after selection.
-    #[serde(default)]
-    pub live_mode: bool,
-
-    /// Visual effects applied after capture.
-    pub effects: EffectsConfig,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct EffectsConfig {
-    /// Apply rounded corners to the screenshot.
-    pub rounded_corners: bool,
-
-    /// Radius in pixels for rounded corners.
-    pub corner_radius: f32,
-
-    /// Apply a drop shadow beneath the screenshot.
-    pub drop_shadow: bool,
-
-    /// Blur radius for the drop shadow (higher = softer shadow).
-    pub shadow_blur_radius: f32,
-
-    /// Horizontal offset of the shadow in pixels.
-    pub shadow_offset_x: f32,
-
-    /// Vertical offset of the shadow in pixels.
-    pub shadow_offset_y: f32,
-
-    /// Shadow color as [R, G, B, A] in 0..=255.
-    pub shadow_color: [u8; 4],
-}
-
-impl Default for EffectsConfig {
-    fn default() -> Self {
-        Self {
-            rounded_corners: false,
-            corner_radius: 12.0,
-            drop_shadow: false,
-            shadow_blur_radius: 20.0,
-            shadow_offset_x: 5.0,
-            shadow_offset_y: 8.0,
-            shadow_color: [0, 0, 0, 160],
-        }
-    }
-}
-
-impl Default for Config {
-    fn default() -> Self {
-        let save_directory = dirs_default_pictures().unwrap_or_else(|| PathBuf::from("."));
-        Self {
-            save_directory,
-            save_format: "png".into(),
-            filename_template: "screenshot_%Y-%m-%d_%H-%M-%S".into(),
-            auto_save: false,
-            auto_copy: false,
-            capture_delay_ms: default_capture_delay_ms(),
-            live_mode: false,
-            effects: EffectsConfig::default(),
-        }
-    }
-}
-
-impl Config {
-    /// Returns the path to the config file, creating parent directories if needed.
-    pub fn config_path() -> Option<PathBuf> {
-        ProjectDirs::from("", "", "rs-pictures")
-            .map(|pd| pd.config_dir().join("config.toml"))
-    }
-
-    /// Load config from disk, or return the default config if the file doesn't exist.
-    pub fn load() -> Result<Self> {
-        let path = match Self::config_path() {
-            Some(p) => p,
-            None => return Ok(Self::default()),
-        };
-
-        if !path.exists() {
-            let config = Self::default();
-            config.save()?;
-            return Ok(config);
-        }
-
-        let raw = std::fs::read_to_string(&path)
-            .with_context(|| format!("Failed to read config at {}", path.display()))?;
-
-        toml::from_str(&raw)
-            .with_context(|| format!("Failed to parse config at {}", path.display()))
-    }
-
-    /// Persist the current config to disk.
-    pub fn save(&self) -> Result<()> {
-        let path = Self::config_path()
-            .context("Could not determine config directory")?;
-
-        if let Some(parent) = path.parent() {
-            std::fs::create_dir_all(parent)
-                .with_context(|| format!("Failed to create config dir {}", parent.display()))?;
-        }
-
-        let serialized = toml::to_string_pretty(self)
-            .context("Failed to serialize config")?;
-
-        std::fs::write(&path, serialized)
-            .with_context(|| format!("Failed to write config to {}", path.display()))?;
-
-        Ok(())
-    }
-
-    /// Build the full output path for a new screenshot using chrono formatting.
-    pub fn output_path(&self) -> PathBuf {
-        let now = chrono::Local::now();
-        let filename = now.format(&self.filename_template).to_string();
-        let ext = &self.save_format;
-        self.save_directory.join(format!("{filename}.{ext}"))
-    }
-}
-
-fn default_capture_delay_ms() -> u64 { 200 }
-
-fn dirs_default_pictures() -> Option<PathBuf> {
-    // Use XDG_PICTURES_DIR if available, otherwise ~/Pictures
-    if let Ok(val) = std::env::var("XDG_PICTURES_DIR") {
-        return Some(PathBuf::from(val));
-    }
-    directories::UserDirs::new()
-        .and_then(|ud| ud.picture_dir().map(|p| p.to_path_buf()))
-}

src/effects.rs

@@ -1,293 +0,0 @@
-//! Post-capture image effects: rounded corners and drop shadow.
-//!
-//! Pipeline:
-//!   RgbaImage (captured)
-//!     → apply_rounded_corners()   – clips corners to transparent via tiny-skia mask
-//!     → apply_drop_shadow()       – composites a blurred shadow beneath the image
-//!     → final RgbaImage (may be larger when shadow is added)
-//!
-//! Performance notes:
-//! - Box blur uses a sliding-window algorithm: O(W*H) regardless of radius.
-//!   Three passes of the box filter approximate a Gaussian.
-//! - Pixel format conversions between RgbaImage and tiny-skia Pixmap are done
-//!   with a single pass each way.
-//! - This module is called from a background thread in review.rs so the UI
-//!   never blocks.
-
-use crate::config::EffectsConfig;
-use image::RgbaImage;
-use tiny_skia::{
-    BlendMode, Color, FillRule, Paint, Path, PathBuilder, Pixmap, PixmapPaint, Transform,
-};
-
-/// Apply all configured effects in order. Returns a new image.
-pub fn apply_effects(img: RgbaImage, cfg: &EffectsConfig) -> RgbaImage {
-    let img = if cfg.rounded_corners {
-        apply_rounded_corners(img, cfg.corner_radius)
-    } else {
-        img
-    };
-    if cfg.drop_shadow {
-        apply_drop_shadow(
-            img,
-            cfg.shadow_blur_radius,
-            cfg.shadow_offset_x,
-            cfg.shadow_offset_y,
-            cfg.shadow_color,
-        )
-    } else {
-        img
-    }
-}
-
-// ─── Rounded corners ─────────────────────────────────────────────────────────
-
-pub fn apply_rounded_corners(img: RgbaImage, radius: f32) -> RgbaImage {
-    let (w, h) = img.dimensions();
-    let mut mask = Pixmap::new(w, h).expect("mask pixmap");
-    let path = rounded_rect_path(0.0, 0.0, w as f32, h as f32, radius);
-    let mut paint = Paint::default();
-    paint.set_color(Color::WHITE);
-    paint.anti_alias = true;
-    mask.fill_path(&path, &paint, FillRule::Winding, Transform::identity(), None);
-
-    let mut pixmap = rgba_image_to_pixmap(&img);
-    let mut dst_paint = PixmapPaint::default();
-    dst_paint.blend_mode = BlendMode::DestinationIn;
-    pixmap.draw_pixmap(0, 0, mask.as_ref(), &dst_paint, Transform::identity(), None);
-    pixmap_to_rgba_image(pixmap)
-}
-
-// ─── Drop shadow ─────────────────────────────────────────────────────────────
-
-pub fn apply_drop_shadow(
-    img: RgbaImage,
-    blur_radius: f32,
-    offset_x: f32,
-    offset_y: f32,
-    shadow_color: [u8; 4],
-) -> RgbaImage {
-    let (iw, ih) = img.dimensions();
-    let br = blur_radius.ceil() as u32;
-
-    let extra_left  = br.saturating_sub((-offset_x).max(0.0) as u32);
-    let extra_top   = br.saturating_sub((-offset_y).max(0.0) as u32);
-    let extra_right  = br + offset_x.max(0.0) as u32;
-    let extra_bottom = br + offset_y.max(0.0) as u32;
-
-    let canvas_w = iw + extra_left + extra_right;
-    let canvas_h = ih + extra_top + extra_bottom;
-
-    // 1. Place the image silhouette at the shadow position.
-    let mut shadow_pixmap = Pixmap::new(canvas_w, canvas_h).expect("shadow pixmap");
-    let img_pixmap = rgba_image_to_pixmap(&img);
-    let shadow_x = (extra_left as f32 + offset_x) as i32;
-    let shadow_y = (extra_top  as f32 + offset_y) as i32;
-
-    let mut sp = PixmapPaint::default();
-    sp.blend_mode = BlendMode::Source;
-    shadow_pixmap.draw_pixmap(shadow_x, shadow_y, img_pixmap.as_ref(), &sp, Transform::identity(), None);
-
-    // 2. Tint the silhouette with the shadow colour.
-    tint_pixmap_as_shadow(&mut shadow_pixmap, shadow_color);
-
-    // 3. Blur the shadow (sliding-window box blur, 3 passes).
-    let shadow_img = pixmap_to_rgba_image(shadow_pixmap);
-    let blurred = box_blur_rgba(&shadow_img, br);
-    let blurred_pixmap = rgba_image_to_pixmap(&blurred);
-
-    // 4. Composite: shadow first, image on top.
-    let mut canvas = Pixmap::new(canvas_w, canvas_h).expect("canvas pixmap");
-    let mut p = PixmapPaint::default();
-    p.blend_mode = BlendMode::Source;
-    canvas.draw_pixmap(0, 0, blurred_pixmap.as_ref(), &p, Transform::identity(), None);
-
-    let mut p2 = PixmapPaint::default();
-    p2.blend_mode = BlendMode::SourceOver;
-    canvas.draw_pixmap(extra_left as i32, extra_top as i32, img_pixmap.as_ref(), &p2, Transform::identity(), None);
-
-    pixmap_to_rgba_image(canvas)
-}
-
-// ─── Helpers ─────────────────────────────────────────────────────────────────
-
-fn rounded_rect_path(x: f32, y: f32, w: f32, h: f32, r: f32) -> Path {
-    let r = r.min(w / 2.0).min(h / 2.0);
-    let mut pb = PathBuilder::new();
-    pb.move_to(x + r, y);
-    pb.line_to(x + w - r, y);
-    pb.quad_to(x + w, y, x + w, y + r);
-    pb.line_to(x + w, y + h - r);
-    pb.quad_to(x + w, y + h, x + w - r, y + h);
-    pb.line_to(x + r, y + h);
-    pb.quad_to(x, y + h, x, y + h - r);
-    pb.line_to(x, y + r);
-    pb.quad_to(x, y, x + r, y);
-    pb.close();
-    pb.finish().expect("rounded rect path")
-}
-
-fn rgba_image_to_pixmap(img: &RgbaImage) -> Pixmap {
-    let (w, h) = img.dimensions();
-    let mut pixmap = Pixmap::new(w, h).expect("pixmap alloc");
-    let pixels = pixmap.pixels_mut();
-    for (i, px) in img.pixels().enumerate() {
-        let [r, g, b, a] = px.0;
-        let af = a as f32 / 255.0;
-        pixels[i] = tiny_skia::PremultipliedColorU8::from_rgba(
-            (r as f32 * af) as u8,
-            (g as f32 * af) as u8,
-            (b as f32 * af) as u8,
-            a,
-        )
-        .unwrap_or(tiny_skia::PremultipliedColorU8::TRANSPARENT);
-    }
-    pixmap
-}
-
-fn pixmap_to_rgba_image(pixmap: Pixmap) -> RgbaImage {
-    let (w, h) = (pixmap.width(), pixmap.height());
-    let mut out = RgbaImage::new(w, h);
-    for (i, px) in pixmap.pixels().iter().enumerate() {
-        let x = (i as u32) % w;
-        let y = (i as u32) / w;
-        let a = px.alpha();
-        let (r, g, b) = if a == 0 {
-            (0, 0, 0)
-        } else {
-            let af = a as f32 / 255.0;
-            (
-                (px.red()   as f32 / af).round().min(255.0) as u8,
-                (px.green() as f32 / af).round().min(255.0) as u8,
-                (px.blue()  as f32 / af).round().min(255.0) as u8,
-            )
-        };
-        out.put_pixel(x, y, image::Rgba([r, g, b, a]));
-    }
-    out
-}
-
-fn tint_pixmap_as_shadow(pixmap: &mut Pixmap, color: [u8; 4]) {
-    let [sr, sg, sb, _] = color;
-    for px in pixmap.pixels_mut() {
-        let a = px.alpha();
-        if a > 0 {
-            let af = a as f32 / 255.0;
-            *px = tiny_skia::PremultipliedColorU8::from_rgba(
-                (sr as f32 * af) as u8,
-                (sg as f32 * af) as u8,
-                (sb as f32 * af) as u8,
-                a,
-            )
-            .unwrap_or(tiny_skia::PremultipliedColorU8::TRANSPARENT);
-        }
-    }
-}
-
-// ─── Sliding-window box blur (O(W*H) regardless of radius) ───────────────────
-//
-// Classic algorithm: maintain a running sum over a window of (2r+1) pixels.
-// When the window slides by one pixel, subtract the pixel leaving the window
-// and add the pixel entering it. Three passes (H→V→H or H→V→H) approximate
-// a Gaussian kernel.
-
-fn box_blur_rgba(img: &RgbaImage, radius: u32) -> RgbaImage {
-    if radius == 0 {
-        return img.clone();
-    }
-    // Three passes of H+V to approximate a Gaussian.
-    let mut buf = sliding_horizontal(img, radius);
-    buf = sliding_vertical(&buf, radius);
-    buf = sliding_horizontal(&buf, radius);
-    buf = sliding_vertical(&buf, radius);
-    buf
-}
-
-/// Horizontal sliding-window box blur, single pass.
-fn sliding_horizontal(img: &RgbaImage, radius: u32) -> RgbaImage {
-    let (w, h) = img.dimensions();
-    let r = radius as i32;
-    let diam = (2 * r + 1) as u32;
-    let mut out = RgbaImage::new(w, h);
-
-    for y in 0..h {
-        // Accumulator for the current window.
-        let mut sr = 0u32;
-        let mut sg = 0u32;
-        let mut sb = 0u32;
-        let mut sa = 0u32;
-
-        // Seed the window around x=0.
-        for dx in -r..=r {
-            let sx = dx.clamp(0, w as i32 - 1) as u32;
-            let p = img.get_pixel(sx, y).0;
-            sr += p[0] as u32;
-            sg += p[1] as u32;
-            sb += p[2] as u32;
-            sa += p[3] as u32;
-        }
-
-        for x in 0..w {
-            out.put_pixel(x, y, image::Rgba([
-                (sr / diam) as u8,
-                (sg / diam) as u8,
-                (sb / diam) as u8,
-                (sa / diam) as u8,
-            ]));
-
-            // Slide: remove left edge, add right edge.
-            let remove_x = (x as i32 - r).clamp(0, w as i32 - 1) as u32;
-            let add_x    = (x as i32 + r + 1).clamp(0, w as i32 - 1) as u32;
-            let rp = img.get_pixel(remove_x, y).0;
-            let ap = img.get_pixel(add_x,    y).0;
-            sr = sr.saturating_sub(rp[0] as u32) + ap[0] as u32;
-            sg = sg.saturating_sub(rp[1] as u32) + ap[1] as u32;
-            sb = sb.saturating_sub(rp[2] as u32) + ap[2] as u32;
-            sa = sa.saturating_sub(rp[3] as u32) + ap[3] as u32;
-        }
-    }
-    out
-}
-
-/// Vertical sliding-window box blur, single pass.
-fn sliding_vertical(img: &RgbaImage, radius: u32) -> RgbaImage {
-    let (w, h) = img.dimensions();
-    let r = radius as i32;
-    let diam = (2 * r + 1) as u32;
-    let mut out = RgbaImage::new(w, h);
-
-    for x in 0..w {
-        let mut sr = 0u32;
-        let mut sg = 0u32;
-        let mut sb = 0u32;
-        let mut sa = 0u32;
-
-        for dy in -r..=r {
-            let sy = dy.clamp(0, h as i32 - 1) as u32;
-            let p = img.get_pixel(x, sy).0;
-            sr += p[0] as u32;
-            sg += p[1] as u32;
-            sb += p[2] as u32;
-            sa += p[3] as u32;
-        }
-
-        for y in 0..h {
-            out.put_pixel(x, y, image::Rgba([
-                (sr / diam) as u8,
-                (sg / diam) as u8,
-                (sb / diam) as u8,
-                (sa / diam) as u8,
-            ]));
-
-            let remove_y = (y as i32 - r).clamp(0, h as i32 - 1) as u32;
-            let add_y    = (y as i32 + r + 1).clamp(0, h as i32 - 1) as u32;
-            let rp = img.get_pixel(x, remove_y).0;
-            let ap = img.get_pixel(x, add_y   ).0;
-            sr = sr.saturating_sub(rp[0] as u32) + ap[0] as u32;
-            sg = sg.saturating_sub(rp[1] as u32) + ap[1] as u32;
-            sb = sb.saturating_sub(rp[2] as u32) + ap[2] as u32;
-            sa = sa.saturating_sub(rp[3] as u32) + ap[3] as u32;
-        }
-    }
-    out
-}

src/hook.rs

@@ -0,0 +1,100 @@
+use windows::Win32::Foundation::{LPARAM, LRESULT, WPARAM};
+use windows::Win32::UI::Input::KeyboardAndMouse::{
+    GetAsyncKeyState, SendInput, INPUT, INPUT_KEYBOARD, KEYBDINPUT, KEYEVENTF_KEYUP, VIRTUAL_KEY,
+    VK_F24, VK_LWIN, VK_RWIN,
+};
+use windows::Win32::UI::WindowsAndMessaging::{
+    CallNextHookEx, SetWindowsHookExW, UnhookWindowsHookEx, HHOOK, MSLLHOOKSTRUCT, WH_MOUSE_LL,
+    WM_MOUSEWHEEL,
+};
+
+use std::sync::atomic::{AtomicIsize, Ordering};
+
+pub const WM_APP_ZOOM_IN: u32 = 0x8001;
+pub const WM_APP_ZOOM_OUT: u32 = 0x8002;
+
+static MOUSE_HOOK: AtomicIsize = AtomicIsize::new(0);
+static MAIN_HWND: AtomicIsize = AtomicIsize::new(0);
+
+pub fn install(main_hwnd: windows::Win32::Foundation::HWND) {
+    MAIN_HWND.store(main_hwnd.0 as isize, Ordering::SeqCst);
+    unsafe {
+        let mh = SetWindowsHookExW(WH_MOUSE_LL, Some(mouse_hook_proc), None, 0)
+            .expect("Failed to install WH_MOUSE_LL hook");
+        MOUSE_HOOK.store(mh.0 as isize, Ordering::SeqCst);
+    }
+}
+
+pub fn uninstall() {
+    let raw = MOUSE_HOOK.swap(0, Ordering::SeqCst);
+    if raw != 0 {
+        unsafe {
+            let _ = UnhookWindowsHookEx(HHOOK(raw as *mut _));
+        }
+    }
+}
+
+unsafe extern "system" fn mouse_hook_proc(code: i32, wparam: WPARAM, lparam: LPARAM) -> LRESULT {
+    if code >= 0 && wparam.0 as u32 == WM_MOUSEWHEEL {
+        unsafe {
+            let lwin = GetAsyncKeyState(VK_LWIN.0 as i32);
+            let rwin = GetAsyncKeyState(VK_RWIN.0 as i32);
+            if (lwin < 0) || (rwin < 0) {
+                let info = &*(lparam.0 as *const MSLLHOOKSTRUCT);
+                let delta = (info.mouseData >> 16) as i16;
+
+                let hwnd_raw = MAIN_HWND.load(Ordering::SeqCst);
+                if hwnd_raw != 0 {
+                    let hwnd = windows::Win32::Foundation::HWND(hwnd_raw as *mut _);
+                    let msg = if delta > 0 {
+                        WM_APP_ZOOM_IN
+                    } else {
+                        WM_APP_ZOOM_OUT
+                    };
+                    let _ = windows::Win32::UI::WindowsAndMessaging::PostMessageW(
+                        hwnd,
+                        msg,
+                        WPARAM(0),
+                        LPARAM(0),
+                    );
+                }
+
+                // Inject a dummy F24 down+up between the Win key-down and the
+                // upcoming Win key-up.  Windows only opens the Start menu when
+                // Win is the *sole* key in a press/release cycle; seeing any
+                // other key in between suppresses it — no stuck key, no Start
+                // menu, no keyboard hook required.
+                inject_f24();
+
+                return LRESULT(1); // consume the scroll event
+            }
+        }
+    }
+    unsafe { CallNextHookEx(None, code, wparam, lparam) }
+}
+
+fn inject_f24() {
+    let inputs = [make_key(VK_F24, false), make_key(VK_F24, true)];
+    unsafe {
+        SendInput(&inputs, std::mem::size_of::<INPUT>() as i32);
+    }
+}
+
+fn make_key(vk: VIRTUAL_KEY, key_up: bool) -> INPUT {
+    INPUT {
+        r#type: INPUT_KEYBOARD,
+        Anonymous: windows::Win32::UI::Input::KeyboardAndMouse::INPUT_0 {
+            ki: KEYBDINPUT {
+                wVk: vk,
+                wScan: 0,
+                dwFlags: if key_up {
+                    KEYEVENTF_KEYUP
+                } else {
+                    Default::default()
+                },
+                time: 0,
+                dwExtraInfo: 0,
+            },
+        },
+    }
+}

src/hyprland.rs

@@ -1,270 +0,0 @@
-//! Hyprland window geometry queries.
-//!
-//! Uses `hyprctl clients -j` and `hyprctl activeworkspace -j` to enumerate
-//! windows on the active workspace. Returns logical pixel coordinates that
-//! match the coordinate space used by libwayshot LogicalRegion.
-//!
-//! If `hyprctl` is not available (non-Hyprland compositor) the functions
-//! return an empty list so the overlay degrades gracefully to manual
-//! selection only.
-
-/// A window's position and size in Wayland logical pixels.
-#[derive(Debug, Clone)]
-pub struct WindowRect {
-    pub x: i32,
-    pub y: i32,
-    pub width: i32,
-    pub height: i32,
-    pub title: String,
-}
-
-/// Returns the logical size (width, height) of the primary/active monitor.
-/// Falls back to None if hyprctl is unavailable.
-pub fn active_monitor_logical_size() -> Option<(u32, u32)> {
-    let info = active_monitor_info()?;
-    Some((info.0, info.1))
-}
-
-/// Returns the scale factor of the active monitor (e.g. 1.33 on HiDPI).
-/// Falls back to 1.0 if hyprctl is unavailable.
-pub fn active_monitor_scale() -> f32 {
-    active_monitor_info().map(|i| i.2).unwrap_or(1.0)
-}
-
-/// Returns the name of the active/focused monitor (e.g. "DP-1").
-pub fn active_monitor_name() -> Option<String> {
-    let output = std::process::Command::new("hyprctl")
-        .args(["monitors", "-j"])
-        .output()
-        .ok()?;
-    if !output.status.success() { return None; }
-    let text = std::str::from_utf8(&output.stdout).ok()?;
-    for obj in split_objects(text) {
-        if json_bool(obj, "focused") == Some(true) {
-            return json_string(obj, "name");
-        }
-    }
-    None
-}
-
-/// Returns (logical_width, logical_height, scale) for the focused monitor.
-fn active_monitor_info() -> Option<(u32, u32, f32)> {
-    let output = std::process::Command::new("hyprctl")
-        .args(["monitors", "-j"])
-        .output()
-        .ok()?;
-
-    if !output.status.success() {
-        return None;
-    }
-
-    let text = std::str::from_utf8(&output.stdout).ok()?;
-
-    // Find the focused monitor (focused: true) or fall back to the first.
-    for obj in split_objects(text) {
-        let focused = json_bool(obj, "focused");
-        if focused != Some(true) {
-            continue;
-        }
-        let w = json_i64(obj, "width")?  as f32;
-        let h = json_i64(obj, "height")? as f32;
-        let scale = json_f32(obj, "scale").unwrap_or(1.0);
-        return Some(((w / scale).round() as u32, (h / scale).round() as u32, scale));
-    }
-
-    // No focused monitor found — take the first one.
-    let obj = split_objects(text).into_iter().next()?;
-    let w = json_i64(obj, "width")?  as f32;
-    let h = json_i64(obj, "height")? as f32;
-    let scale = json_f32(obj, "scale").unwrap_or(1.0);
-    Some(((w / scale).round() as u32, (h / scale).round() as u32, scale))
-}
-
-/// Returns an empty Vec if hyprctl is unavailable or returns bad data.
-pub fn active_workspace_windows() -> Vec<WindowRect> {
-    let workspace_id = match active_workspace_id() {
-        Some(id) => id,
-        None => return vec![],
-    };
-
-    let output = match std::process::Command::new("hyprctl")
-        .args(["clients", "-j"])
-        .output()
-    {
-        Ok(o) if o.status.success() => o.stdout,
-        _ => return vec![],
-    };
-
-    parse_clients(&output, workspace_id)
-}
-
-// ─── Private helpers ──────────────────────────────────────────────────────────
-
-fn active_workspace_id() -> Option<i64> {
-    let output = std::process::Command::new("hyprctl")
-        .args(["activeworkspace", "-j"])
-        .output()
-        .ok()?;
-
-    if !output.status.success() {
-        return None;
-    }
-
-    // Extract "id": <number> with a tiny hand-rolled parse — no serde dep.
-    let text = std::str::from_utf8(&output.stdout).ok()?;
-    json_i64(text, "id")
-}
-
-/// Parse the `hyprctl clients -j` JSON output without pulling in serde_json.
-///
-/// We only need four fields per client: `at`, `size`, `workspace.id`, `title`,
-/// `mapped`, `hidden`. A minimal hand-rolled extractor is sufficient.
-fn parse_clients(data: &[u8], workspace_id: i64) -> Vec<WindowRect> {
-    let text = match std::str::from_utf8(data) {
-        Ok(s) => s,
-        Err(_) => return vec![],
-    };
-
-    let mut result = Vec::new();
-
-    // Split on top-level `{` … `}` objects.
-    // The JSON is a flat array of objects with no nested arrays of objects,
-    // so a simple brace-depth scan is safe here.
-    for obj in split_objects(text) {
-        // Skip unmapped or hidden windows.
-        if json_bool(obj, "mapped") != Some(true) { continue; }
-        if json_bool(obj, "hidden") == Some(true)  { continue; }
-
-        // Only windows on the active workspace.
-        if json_i64_nested(obj, "workspace", "id") != Some(workspace_id) { continue; }
-
-        let at   = json_pair_i64(obj, "at");
-        let size = json_pair_i64(obj, "size");
-
-        let (Some((x, y)), Some((w, h))) = (at, size) else { continue };
-        if w <= 0 || h <= 0 { continue; }
-
-        let title = json_string(obj, "title").unwrap_or_default();
-
-        result.push(WindowRect { x, y, width: w, height: h, title });
-    }
-
-    result
-}
-
-// ─── Tiny JSON field extractors ───────────────────────────────────────────────
-
-/// Split a JSON array text into individual object strings.
-fn split_objects(text: &str) -> Vec<&str> {
-    let mut objects = Vec::new();
-    let bytes = text.as_bytes();
-    let mut depth = 0i32;
-    let mut start = None;
-    let mut in_string = false;
-    let mut escape = false;
-
-    for (i, &b) in bytes.iter().enumerate() {
-        if escape { escape = false; continue; }
-        if b == b'\\' && in_string { escape = true; continue; }
-        if b == b'"' { in_string = !in_string; continue; }
-        if in_string { continue; }
-
-        match b {
-            b'{' => {
-                if depth == 0 { start = Some(i); }
-                depth += 1;
-            }
-            b'}' => {
-                depth -= 1;
-                if depth == 0 {
-                    if let Some(s) = start {
-                        objects.push(&text[s..=i]);
-                    }
-                    start = None;
-                }
-            }
-            _ => {}
-        }
-    }
-    objects
-}
-
-/// Extract `"key": <integer>` from a JSON object string.
-fn json_i64(text: &str, key: &str) -> Option<i64> {
-    let needle = format!("\"{}\"", key);
-    let pos = text.find(&needle)?;
-    let after = text[pos + needle.len()..].trim_start();
-    let after = after.strip_prefix(':')?.trim_start();
-    let end = after.find(|c: char| !c.is_ascii_digit() && c != '-').unwrap_or(after.len());
-    after[..end].parse().ok()
-}
-
-/// Extract `"key": <bool>` from a JSON object string.
-fn json_bool(text: &str, key: &str) -> Option<bool> {
-    let needle = format!("\"{}\"", key);
-    let pos = text.find(&needle)?;
-    let after = text[pos + needle.len()..].trim_start();
-    let after = after.strip_prefix(':')?.trim_start();
-    if after.starts_with("true")  { return Some(true); }
-    if after.starts_with("false") { return Some(false); }
-    None
-}
-
-/// Extract `"key": "string value"` from a JSON object string.
-fn json_string<'a>(text: &'a str, key: &str) -> Option<String> {
-    let needle = format!("\"{}\"", key);
-    let pos = text.find(&needle)?;
-    let after = text[pos + needle.len()..].trim_start();
-    let after = after.strip_prefix(':')?.trim_start();
-    let after = after.strip_prefix('"')?;
-    // Collect until unescaped closing quote.
-    let mut out = String::new();
-    let mut chars = after.chars();
-    loop {
-        match chars.next()? {
-            '\\' => { chars.next(); } // skip escaped char
-            '"'  => break,
-            c    => out.push(c),
-        }
-    }
-    Some(out)
-}
-
-/// Extract `"key": [a, b]` → (a, b) as i64 pair.
-fn json_pair_i64(text: &str, key: &str) -> Option<(i32, i32)> {
-    let needle = format!("\"{}\"", key);
-    let pos = text.find(&needle)?;
-    let after = text[pos + needle.len()..].trim_start();
-    let after = after.strip_prefix(':')?.trim_start();
-    let after = after.strip_prefix('[')?;
-    let end = after.find(']')?;
-    let inner = &after[..end];
-    let mut parts = inner.split(',');
-    let a: i32 = parts.next()?.trim().parse().ok()?;
-    let b: i32 = parts.next()?.trim().parse().ok()?;
-    Some((a, b))
-}
-
-/// Extract `"outer": { "inner_key": <integer> }` — one level of nesting.
-fn json_i64_nested(text: &str, outer: &str, inner_key: &str) -> Option<i64> {
-    let needle = format!("\"{}\"", outer);
-    let pos = text.find(&needle)?;
-    let after = text[pos + needle.len()..].trim_start();
-    let after = after.strip_prefix(':')?.trim_start();
-    let brace_start = after.find('{')?;
-    let brace_end   = after.find('}')?;
-    let nested = &after[brace_start..=brace_end];
-    json_i64(nested, inner_key)
-}
-
-/// Extract `"key": <float>` from a JSON object string.
-fn json_f32(text: &str, key: &str) -> Option<f32> {
-    let needle = format!("\"{}\"", key);
-    let pos = text.find(&needle)?;
-    let after = text[pos + needle.len()..].trim_start();
-    let after = after.strip_prefix(':')?.trim_start();
-    let end = after
-        .find(|c: char| !c.is_ascii_digit() && c != '.' && c != '-')
-        .unwrap_or(after.len());
-    after[..end].parse().ok()
-}

src/magnifier.rs

@@ -0,0 +1,76 @@
+use windows::Win32::Foundation::HWND;
+use windows::Win32::Graphics::Gdi::{
+    GetMonitorInfoW, MonitorFromWindow, MONITORINFO, MONITOR_DEFAULTTOPRIMARY,
+};
+use windows::Win32::UI::Magnification::{
+    MagInitialize, MagSetFullscreenTransform, MagUninitialize,
+};
+
+use crate::state::AppState;
+
+pub struct Magnifier {
+    screen_w: i32,
+    screen_h: i32,
+}
+
+impl Magnifier {
+    pub fn new(screen_w: i32, screen_h: i32) -> Self {
+        Self { screen_w, screen_h }
+    }
+
+    /// Apply or clear the fullscreen magnification transform.
+    pub fn update(&self, state: &mut AppState, just_activated: bool) {
+        unsafe {
+            if !state.active {
+                let _ = MagSetFullscreenTransform(1.0, 0, 0);
+                return;
+            }
+
+            let z = state.zoom;
+            let src_w = self.screen_w as f32 / z;
+            let src_h = self.screen_h as f32 / z;
+
+            state.update_viewport(
+                src_w,
+                src_h,
+                self.screen_w as f32,
+                self.screen_h as f32,
+                just_activated,
+            );
+
+            let x_off = state.viewport_x as i32;
+            let y_off = state.viewport_y as i32;
+
+            let _ = MagSetFullscreenTransform(z, x_off, y_off);
+        }
+    }
+}
+
+pub fn create() -> Magnifier {
+    unsafe {
+        MagInitialize().expect("MagInitialize failed");
+        let (sw, sh) = monitor_dimensions();
+        Magnifier::new(sw, sh)
+    }
+}
+
+pub fn shutdown() {
+    unsafe {
+        let _ = MagSetFullscreenTransform(1.0, 0, 0);
+        let _ = MagUninitialize();
+    }
+}
+
+fn monitor_dimensions() -> (i32, i32) {
+    unsafe {
+        let hmon = MonitorFromWindow(HWND(std::ptr::null_mut()), MONITOR_DEFAULTTOPRIMARY);
+        let mut info = MONITORINFO {
+            cbSize: std::mem::size_of::<MONITORINFO>() as u32,
+            ..Default::default()
+        };
+        let _ = GetMonitorInfoW(hmon, &mut info);
+        let sw = info.rcMonitor.right - info.rcMonitor.left;
+        let sh = info.rcMonitor.bottom - info.rcMonitor.top;
+        (sw, sh)
+    }
+}

src/main.rs

@@ -1,192 +1,177 @@
-//! rs-pictures — Wayland screenshot tool
-//!
-//! Flow:
-//!   1. Load config from ~/.config/rs-pictures/config.toml
-//!   2. Sleep briefly so the user can switch away from the terminal that
-//!      launched us, and the compositor has time to repaint.
-//!   3. Capture all outputs → frozen desktop snapshot for overlay background.
-//!   4. Open fullscreen selection overlay (drag / two-click rubber-band).
-//!   5. Sleep 120 ms so compositor repaints after overlay closes.
-//!   6. Capture the selected region with libwayshot.
-//!   7a. auto_save/auto_copy set → apply effects, act silently, exit.
-//!   7b. Otherwise → open review window (effects applied interactively there).
+#![windows_subsystem = "windows"]
 
-mod capture;
-mod config;
-mod effects;
-mod hyprland;
-mod overlay;
-mod review;
+mod caret;
+mod hook;
+mod magnifier;
+mod state;
+mod tray;
 
-use anyhow::{Context, Result};
-use arboard::{Clipboard, ImageData};
-use eframe::egui;
-use overlay::{SelectionOverlay, SelectionResult};
-use review::ReviewWindow;
+use state::AppState;
+use windows::core::w;
+use windows::Win32::Foundation::{HINSTANCE, HWND, LPARAM, LRESULT, WPARAM};
+use windows::Win32::System::Com::{CoInitializeEx, CoUninitialize, COINIT_APARTMENTTHREADED};
+use windows::Win32::UI::HiDpi::{
+    SetProcessDpiAwarenessContext, DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2,
+};
+use windows::Win32::UI::WindowsAndMessaging::GetCursorPos;
+use windows::Win32::UI::WindowsAndMessaging::WINDOW_EX_STYLE;
+use windows::Win32::UI::WindowsAndMessaging::{
+    CreateWindowExW, DefWindowProcW, DispatchMessageW, GetMessageW, PostQuitMessage,
+    RegisterClassExW, SetTimer, TranslateMessage, CS_HREDRAW, CS_VREDRAW, MSG, WM_DESTROY,
+    WM_TIMER, WNDCLASSEXW, WS_OVERLAPPEDWINDOW,
+};
 
-fn main() -> Result<()> {
-    // ── 1. Load config & arguments ────────────────────────────────────────────
-    let config = config::Config::load().context("Failed to load config")?;
-    let is_live_mode = config.live_mode || std::env::args().any(|a| a == "--live" || a == "-l");
+static mut APP_STATE: Option<AppState> = None;
+static mut MAGNIFIER: Option<magnifier::Magnifier> = None;
 
-    // ── 2. Query Hyprland metadata (no window open yet) ───────────────────────
-    // Scale is only needed for window-rect conversion in the overlay.
-    let scale = hyprland::active_monitor_scale();
-    let (lw, lh) = hyprland::active_monitor_logical_size().unwrap_or((1920, 1080));
+const TIMER_ID: usize = 1;
+const TIMER_MS: u32 = 16; // ~60 fps
 
-    // ── 3. Pre-capture delay ──────────────────────────────────────────────────
-    // Give the compositor time to unmap the terminal/launcher that started us
-    // and repaint the desktop before we freeze it.
-    // Configurable via capture_delay_ms in config.toml (default 800ms).
-    std::thread::sleep(std::time::Duration::from_millis(config.capture_delay_ms));
+fn main() {
+    unsafe {
+        // DPI awareness — must be set before any window is created.
+        let _ = SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
 
-    // ── 4. Capture full desktop BEFORE opening any window ────────────────────
-    // In freeze mode (default), we snapshot before the overlay.
-    // In live mode, we skip this and capture later.
-    let background_snapshot = if is_live_mode {
-        None
-    } else {
-        Some(capture::capture_all_outputs().context("Failed to capture desktop snapshot")?)
-    };
+        // COM initialisation needed for UI Automation (caret tracking).
+        let _ = CoInitializeEx(None, COINIT_APARTMENTTHREADED);
+        APP_STATE = Some(AppState::new());
 
-    // ── 5. Run the selection overlay ─────────────────────────────────────────
-    let selection_result = {
-        use std::sync::{Arc, Mutex};
-        let shared: Arc<Mutex<Option<SelectionResult>>> = Arc::new(Mutex::new(None));
-        let shared_clone = Arc::clone(&shared);
+        let instance = get_instance();
+        register_msg_class(instance);
 
-        let native_options = eframe::NativeOptions {
-            viewport: egui::ViewportBuilder::default()
-                .with_app_id("rs-pictures-overlay")
-                .with_inner_size([lw as f32, lh as f32])
-                .with_position([0.0, 0.0])
-                .with_fullscreen(true)
-                .with_maximized(true)
-                .with_decorations(false)
-                .with_transparent(true)
-                .with_always_on_top()
-                .with_resizable(false),
-            ..Default::default()
+        // Invisible message-only window to receive WM_APP zoom messages and WM_TIMER.
+        let msg_hwnd = CreateWindowExW(
+            WINDOW_EX_STYLE(0),
+            w!("IwakuMsg"),
+            w!(""),
+            WS_OVERLAPPEDWINDOW,
+            0,
+            0,
+            0,
+            0,
+            None,
+            None,
+            instance,
+            None,
+        )
+        .expect("Failed to create message window");
+
+        // Global Win+Scroll hook.
+        hook::install(msg_hwnd);
+
+        // Fullscreen magnifier — no overlay window needed with MagSetFullscreenTransform.
+        MAGNIFIER = Some(magnifier::create());
+
+        // System tray icon.
+        let tray = tray::Tray::new();
+
+        // 16 ms refresh timer.
+        SetTimer(msg_hwnd, TIMER_ID, TIMER_MS, None);
+
+        // Message loop.
+        let mut msg = MSG::default();
+        loop {
+            if tray.process_events() {
+                break;
+            }
+
+            let ret = GetMessageW(&mut msg, None, 0, 0);
+            if ret.0 == 0 || ret.0 == -1 {
+                break;
+            }
+            let _ = TranslateMessage(&msg);
+            DispatchMessageW(&msg);
+        }
+
+        hook::uninstall();
+        magnifier::shutdown();
+        CoUninitialize();
+    }
+}
+
+/// Window procedure for the invisible message window.
+unsafe extern "system" fn wnd_proc(
+    hwnd: HWND,
+    msg: u32,
+    wparam: WPARAM,
+    lparam: LPARAM,
+) -> LRESULT {
+    unsafe {
+        match msg {
+            WM_TIMER => {
+                if wparam.0 == TIMER_ID {
+                    tick();
+                }
+                LRESULT(0)
+            }
+            m if m == hook::WM_APP_ZOOM_IN => {
+                if let Some(state) = (*std::ptr::addr_of_mut!(APP_STATE)).as_mut() {
+                    state.zoom_in();
+                }
+                LRESULT(0)
+            }
+            m if m == hook::WM_APP_ZOOM_OUT => {
+                if let Some(state) = (*std::ptr::addr_of_mut!(APP_STATE)).as_mut() {
+                    state.zoom_out();
+                }
+                LRESULT(0)
+            }
+            WM_DESTROY => {
+                PostQuitMessage(0);
+                LRESULT(0)
+            }
+            _ => DefWindowProcW(hwnd, msg, wparam, lparam),
+        }
+    }
+}
+
+/// Called every ~16 ms: update inputs, recalculate priority, push to magnifier.
+unsafe fn tick() {
+    unsafe {
+        let state = match (*std::ptr::addr_of_mut!(APP_STATE)).as_mut() {
+            Some(s) => s,
+            None => return,
         };
 
-        let bg_clone = background_snapshot.clone();
-        eframe::run_native(
-            "rs-pictures — Select Region",
-            native_options,
-            Box::new(move |cc| {
-                let app = SelectionOverlay::new(cc, bg_clone, scale);
-                Ok(Box::new(OverlayWrapper {
-                    inner: app,
-                    result_sink: shared_clone,
-                }) as Box<dyn eframe::App>)
-            }),
-        )
-        .map_err(|e| anyhow::anyhow!("Overlay window error: {e}"))?;
+        // Remember whether the magnifier was active before this tick so we
+        // can detect the exact frame it turns on and snap the smooth position.
+        let was_active = state.active;
 
-        Arc::try_unwrap(shared)
-            .ok()
-            .and_then(|m| m.into_inner().ok())
-            .flatten()
-    };
-
-    // ── 6. Act on the selection ───────────────────────────────────────────────
-    let region = match selection_result {
-        Some(SelectionResult::Selected(r)) => r,
-        Some(SelectionResult::Cancelled) | None => {
-            eprintln!("Selection cancelled.");
-            return Ok(());
+        // 1. Update cursor and caret.
+        let mut pt = windows::Win32::Foundation::POINT::default();
+        if GetCursorPos(&mut pt).is_ok() {
+            state.cursor = pt;
         }
-    };
+        state.caret = caret::get_caret_pos();
 
-    // ── 7. Get the raw region image ───────────────────────────────────────────
-    let raw_image = if let Some(bg) = background_snapshot {
-        // Freeze mode: Crop directly from the pre-captured snapshot.
-        let px = (region.x.max(0) as u32).min(bg.width().saturating_sub(1));
-        let py = (region.y.max(0) as u32).min(bg.height().saturating_sub(1));
-        let pw = region.width.min(bg.width() - px);
-        let ph = region.height.min(bg.height() - py);
-        image::imageops::crop_imm(&bg, px, py, pw, ph).to_image()
-    } else {
-        // Live mode: Wait for the compositor to clear the overlay, then capture just the region.
-        std::thread::sleep(std::time::Duration::from_millis(config.capture_delay_ms.max(200)));
-        capture::capture_region(region).context("Failed to capture region")?
-    };
+        // 2. Advance state.
+        let just_activated = state.active && !was_active;
+        state.update(just_activated);
 
-    // ── 8a. Auto-mode — no review window ─────────────────────────────────────
-    if config.auto_save || config.auto_copy {
-        let final_image = effects::apply_effects(raw_image, &config.effects);
-        if config.auto_save {
-            let path = config.output_path();
-            if let Some(parent) = path.parent() {
-                std::fs::create_dir_all(parent)
-                    .with_context(|| format!("Cannot create dir {}", parent.display()))?;
-            }
-            final_image.save(&path)
-                .with_context(|| format!("Failed to save to {}", path.display()))?;
-            eprintln!("Saved to {}", path.display());
-        }
-        if config.auto_copy {
-            clipboard_copy(&final_image)?;
-            eprintln!("Copied to clipboard.");
-        }
-        return Ok(());
-    }
-
-    // ── 8b. Review window ─────────────────────────────────────────────────────
-    // The review window applies effects internally on a background thread, so
-    // we hand it the raw (un-effected) image.
-    let native_options = eframe::NativeOptions {
-        viewport: egui::ViewportBuilder::default()
-            .with_title("rs-pictures — Review")
-            .with_inner_size([900.0, 700.0])
-            .with_min_inner_size([400.0, 300.0]),
-        ..Default::default()
-    };
-
-    eframe::run_native(
-        "rs-pictures — Review",
-        native_options,
-        Box::new(move |cc| {
-            Ok(Box::new(ReviewWindow::new(cc, raw_image, config)) as Box<dyn eframe::App>)
-        }),
-    )
-    .map_err(|e| anyhow::anyhow!("Review window error: {e}"))?;
-
-    Ok(())
-}
-
-// ─── Clipboard helper (shared with review.rs logic) ───────────────────────────
-
-pub fn clipboard_copy(img: &image::RgbaImage) -> Result<()> {
-    let (w, h) = img.dimensions();
-    let bytes = img.as_raw().clone();
-    let mut cb = Clipboard::new().context("Could not open clipboard")?;
-    cb.set_image(ImageData {
-        width: w as usize,
-        height: h as usize,
-        bytes: bytes.into(),
-    })
-    .context("Failed to write image to clipboard")
-}
-
-// ─── Overlay wrapper ──────────────────────────────────────────────────────────
-
-use std::sync::{Arc, Mutex};
-
-struct OverlayWrapper {
-    inner: SelectionOverlay,
-    result_sink: Arc<Mutex<Option<SelectionResult>>>,
-}
-
-impl eframe::App for OverlayWrapper {
-    fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
-        self.inner.update(ctx, frame);
-        if let Some(result) = self.inner.take_result() {
-            *self.result_sink.lock().unwrap() = Some(result);
+        // 3. Push the new transform.
+        if let Some(mag) = (*std::ptr::addr_of_mut!(MAGNIFIER)).as_mut() {
+            mag.update(state, just_activated);
         }
     }
+}
 
-    fn clear_color(&self, visuals: &egui::Visuals) -> [f32; 4] {
-        self.inner.clear_color(visuals)
+unsafe fn get_instance() -> HINSTANCE {
+    unsafe {
+        use windows::Win32::System::LibraryLoader::GetModuleHandleW;
+        GetModuleHandleW(None).unwrap().into()
+    }
+}
+
+unsafe fn register_msg_class(instance: HINSTANCE) {
+    unsafe {
+        let wc = WNDCLASSEXW {
+            cbSize: std::mem::size_of::<WNDCLASSEXW>() as u32,
+            style: CS_HREDRAW | CS_VREDRAW,
+            lpfnWndProc: Some(wnd_proc),
+            hInstance: instance,
+            lpszClassName: w!("IwakuMsg"),
+            ..Default::default()
+        };
+        RegisterClassExW(&wc);
     }
 }

src/overlay.rs

@@ -1,359 +0,0 @@
-//! Region selection overlay.
-//!
-//! Input modes (all available simultaneously):
-//!   - Window pick: hover over a window → it highlights; single click captures it.
-//!   - Drag:        press and drag → rubber-band selection (overrides window pick).
-//!   - Two-click:   click once (anchor), move, click again → selection.
-//!
-//! Coordinate system:
-//!   egui screen_rect == physical pixels of the monitor.
-//!   capture::Region also uses physical pixels.
-//!   Window rects from hyprctl are logical pixels — multiplied by scale to get physical.
-//!   No scale division anywhere: Region handed to capture.rs is in physical pixels,
-//!   and capture.rs crops from the physical full-screen capture directly.
-
-use eframe::egui::{self, Color32, CursorIcon, Pos2, Rect, Rounding, Stroke, Vec2};
-use image::RgbaImage;
-
-use crate::capture::Region;
-use crate::hyprland::WindowRect;
-
-/// Result returned when the user completes or cancels the selection.
-#[derive(Debug)]
-pub enum SelectionResult {
-    Selected(Region),
-    Cancelled,
-}
-
-/// Input state machine.
-#[derive(Default)]
-enum SelectionState {
-    #[default]
-    Idle,
-    Dragging { start: Pos2 },
-    AwaitingSecondClick { start: Pos2 },
-    Done { start: Pos2, end: Pos2 },
-    Cancelled,
-}
-
-const MAX_TEX: u32 = 8192;
-
-pub struct SelectionOverlay {
-    background: Option<egui::TextureHandle>,
-    /// Hyprland monitor scale (logical→physical). Used only for window rect conversion.
-    scale: f32,
-    state: SelectionState,
-    result: Option<SelectionResult>,
-    windows: Vec<WindowRect>,
-    hovered_window: Option<usize>,
-    diag_printed: bool,
-}
-
-impl SelectionOverlay {
-    pub fn new(cc: &eframe::CreationContext<'_>, background_snapshot: Option<RgbaImage>, scale: f32) -> Self {
-        let texture = background_snapshot.map(|img| {
-            let tex_image = fit_to_max_texture(img);
-            let (tw, th) = tex_image.dimensions();
-            let color_image = egui::ColorImage::from_rgba_unmultiplied(
-                [tw as usize, th as usize],
-                tex_image.as_raw(),
-            );
-            cc.egui_ctx
-                .load_texture("background", color_image, egui::TextureOptions::LINEAR)
-        });
-
-        let windows = crate::hyprland::active_workspace_windows();
-
-        Self {
-            background: texture,
-            scale,
-            state: SelectionState::default(),
-            result: None,
-            windows,
-            hovered_window: None,
-            diag_printed: false,
-        }
-    }
-
-    pub fn take_result(&mut self) -> Option<SelectionResult> {
-        self.result.take()
-    }
-
-    /// Convert a hyprctl WindowRect (logical px) to an egui Rect (logical points).
-    fn window_to_egui_rect(win: &WindowRect, _scale: f32) -> Rect {
-        Rect::from_min_size(
-            Pos2::new(win.x as f32, win.y as f32),
-            Vec2::new(win.width as f32, win.height as f32),
-        )
-    }
-}
-
-impl eframe::App for SelectionOverlay {
-    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
-        ctx.set_cursor_icon(CursorIcon::Crosshair);
-
-        if ctx.input(|i| i.key_pressed(egui::Key::Escape)) {
-            self.state = SelectionState::Cancelled;
-        }
-
-        let screen_rect = ctx.screen_rect();
-
-        if !self.diag_printed {
-            self.diag_printed = true;
-            eprintln!(
-                "[overlay diag] screen_rect={screen_rect:?} ppp={} scale={}",
-                ctx.pixels_per_point(),
-                self.scale,
-            );
-        }
-
-        let dim = Color32::from_black_alpha(140);
-
-        const DRAG_THRESHOLD: f32 = 4.0;
-
-        let (hover_pos, press_origin, primary_down, primary_released) =
-            ctx.input(|i| {
-                (
-                    i.pointer.hover_pos(),
-                    i.pointer.press_origin(),
-                    i.pointer.primary_down(),
-                    i.pointer.primary_released(),
-                )
-            });
-
-        let travel: f32 = match (press_origin, hover_pos) {
-            (Some(o), Some(p)) => o.distance(p),
-            _ => 0.0,
-        };
-        let is_click = primary_released && travel <= DRAG_THRESHOLD;
-        let is_drag  = primary_down    && travel >  DRAG_THRESHOLD;
-
-        // ── Window hover detection ────────────────────────────────────────────
-        self.hovered_window = None;
-        if matches!(self.state, SelectionState::Idle) {
-            if let Some(pos) = hover_pos {
-                for (i, win) in self.windows.iter().enumerate().rev() {
-                    if Self::window_to_egui_rect(win, self.scale).contains(pos) {
-                        self.hovered_window = Some(i);
-                        break;
-                    }
-                }
-            }
-        }
-
-        // ── State transitions ─────────────────────────────────────────────────
-        match &self.state {
-            SelectionState::Idle => {
-                if is_drag {
-                    self.hovered_window = None;
-                    self.state = SelectionState::Dragging {
-                        start: press_origin.unwrap_or_default(),
-                    };
-                } else if is_click {
-                    if let Some(idx) = self.hovered_window {
-                        let win = &self.windows[idx];
-                        let rect = Self::window_to_egui_rect(win, self.scale).intersect(screen_rect);
-                        self.state = SelectionState::Done {
-                            start: rect.min,
-                            end: rect.max,
-                        };
-                    } else {
-                        self.state = SelectionState::AwaitingSecondClick {
-                            start: press_origin.unwrap_or_default(),
-                        };
-                    }
-                }
-            }
-            SelectionState::Dragging { start } => {
-                let start = *start;
-                if primary_released {
-                    if let Some(end) = hover_pos {
-                        self.state = SelectionState::Done { start, end };
-                    } else {
-                        self.state = SelectionState::Idle;
-                    }
-                }
-                if !primary_down && !primary_released {
-                    self.state = SelectionState::AwaitingSecondClick { start };
-                }
-            }
-            SelectionState::AwaitingSecondClick { start } => {
-                let start = *start;
-                if is_click {
-                    if let Some(end) = hover_pos {
-                        self.state = SelectionState::Done { start, end };
-                    }
-                }
-            }
-            SelectionState::Done { .. } | SelectionState::Cancelled => {}
-        }
-
-        // ── Current live rect ─────────────────────────────────────────────────
-        let current_rect: Option<Rect> = match &self.state {
-            SelectionState::Dragging { start } => hover_pos.map(|p| Rect::from_two_pos(*start, p)),
-            SelectionState::AwaitingSecondClick { start } => hover_pos.map(|p| Rect::from_two_pos(*start, p)),
-            SelectionState::Done { start, end } => Some(Rect::from_two_pos(*start, *end)),
-            _ => None,
-        };
-
-        // ── Draw ──────────────────────────────────────────────────────────────
-        egui::CentralPanel::default()
-            .frame(egui::Frame::none())
-            .show(ctx, |ui| {
-                let painter = ui.painter();
-
-                // 1. Background screenshot (if in freeze mode).
-                if let Some(bg) = &self.background {
-                    painter.image(
-                        bg.id(),
-                        screen_rect,
-                        Rect::from_min_max(Pos2::ZERO, Pos2::new(1.0, 1.0)),
-                        Color32::WHITE,
-                    );
-                }
-
-                // 2. Dim overlay.
-                let active_rect = current_rect.or_else(|| {
-                    self.hovered_window
-                        .map(|i| Self::window_to_egui_rect(&self.windows[i], self.scale).intersect(screen_rect))
-                });
-
-                if let Some(sel) = active_rect {
-                    let s = sel.intersect(screen_rect);
-                    painter.rect_filled(
-                        Rect::from_min_max(screen_rect.min, Pos2::new(screen_rect.max.x, s.min.y)),
-                        Rounding::ZERO, dim,
-                    );
-                    painter.rect_filled(
-                        Rect::from_min_max(Pos2::new(screen_rect.min.x, s.max.y), screen_rect.max),
-                        Rounding::ZERO, dim,
-                    );
-                    painter.rect_filled(
-                        Rect::from_min_max(
-                            Pos2::new(screen_rect.min.x, s.min.y),
-                            Pos2::new(s.min.x, s.max.y),
-                        ),
-                        Rounding::ZERO, dim,
-                    );
-                    painter.rect_filled(
-                        Rect::from_min_max(
-                            Pos2::new(s.max.x, s.min.y),
-                            Pos2::new(screen_rect.max.x, s.max.y),
-                        ),
-                        Rounding::ZERO, dim,
-                    );
-
-                    // Only draw a stroke if we are actively dragging a selection.
-                    if current_rect.is_some() {
-                        painter.rect_stroke(s, Rounding::ZERO, Stroke::new(1.5, Color32::from_rgb(100, 180, 255)));
-                    }
-
-                    // Size label in physical pixels.
-                    let label = format!("{} × {}", s.width().round() as u32, s.height().round() as u32);
-                    let lp = Pos2::new(s.min.x + 4.0, s.min.y - 18.0)
-                        .clamp(Pos2::ZERO, screen_rect.max);
-                    painter.text(lp, egui::Align2::LEFT_TOP, label,
-                        egui::FontId::monospace(13.0), Color32::WHITE);
-
-                    if let Some(idx) = self.hovered_window {
-                        if current_rect.is_none() {
-                            let title = &self.windows[idx].title;
-                            if !title.is_empty() {
-                                painter.text(
-                                    Pos2::new(s.min.x + 4.0, s.min.y + 4.0),
-                                    egui::Align2::LEFT_TOP,
-                                    title,
-                                    egui::FontId::proportional(12.0),
-                                    Color32::from_rgba_unmultiplied(255, 190, 50, 220),
-                                );
-                            }
-                        }
-                    }
-                } else {
-                    painter.rect_filled(screen_rect, Rounding::ZERO, dim);
-                }
-
-                // 3. Crosshair.
-                if let Some(pos) = hover_pos {
-                    let s = Stroke::new(1.0, Color32::from_white_alpha(180));
-                    painter.line_segment(
-                        [Pos2::new(screen_rect.min.x, pos.y), Pos2::new(screen_rect.max.x, pos.y)], s);
-                    painter.line_segment(
-                        [Pos2::new(pos.x, screen_rect.min.y), Pos2::new(pos.x, screen_rect.max.y)], s);
-                }
-
-                // 4. Hint text.
-                let hint = match &self.state {
-                    SelectionState::Idle if self.hovered_window.is_some() =>
-                        "Click to capture window   |   Drag for custom selection   |   Esc to cancel",
-                    SelectionState::Idle =>
-                        "Click or drag to select   |   Esc to cancel",
-                    SelectionState::Dragging { .. } => "Release to capture",
-                    SelectionState::AwaitingSecondClick { .. } =>
-                        "Click to set the second corner   |   Esc to cancel",
-                    _ => "",
-                };
-                if !hint.is_empty() {
-                    painter.text(
-                        Pos2::new(screen_rect.center().x, screen_rect.max.y - 28.0),
-                        egui::Align2::CENTER_BOTTOM,
-                        hint,
-                        egui::FontId::proportional(14.0),
-                        Color32::from_white_alpha(200),
-                    );
-                }
-            });
-
-        // ── Resolve ───────────────────────────────────────────────────────────
-        match &self.state {
-            SelectionState::Done { start, end } => {
-                let rect = Rect::from_two_pos(*start, *end).intersect(screen_rect);
-                if rect.width() > 2.0 && rect.height() > 2.0 {
-                    let ppp = ctx.pixels_per_point();
-                    // egui coords are logical points — scale to physical pixels.
-                    let x = ((rect.min.x - screen_rect.min.x) * ppp).round() as i32;
-                    let y = ((rect.min.y - screen_rect.min.y) * ppp).round() as i32;
-                    let width  = (rect.width() * ppp).round()  as u32;
-                    let height = (rect.height() * ppp).round() as u32;
-
-                    eprintln!("[overlay] physical x={x} y={y} w={width} h={height}");
-
-                    self.result = Some(SelectionResult::Selected(Region {
-                        x: x.max(0),
-                        y: y.max(0),
-                        width,
-                        height,
-                    }));
-                    ctx.send_viewport_cmd(egui::ViewportCommand::Close);
-                } else {
-                    self.state = SelectionState::Idle;
-                }
-            }
-            SelectionState::Cancelled => {
-                self.result = Some(SelectionResult::Cancelled);
-                ctx.send_viewport_cmd(egui::ViewportCommand::Close);
-            }
-            _ => {}
-        }
-
-        ctx.request_repaint_after(std::time::Duration::from_millis(16));
-    }
-
-    fn clear_color(&self, _visuals: &egui::Visuals) -> [f32; 4] {
-        [0.0, 0.0, 0.0, 0.0]
-    }
-}
-
-fn fit_to_max_texture(img: RgbaImage) -> RgbaImage {
-    let (w, h) = img.dimensions();
-    if w <= MAX_TEX && h <= MAX_TEX {
-        return img;
-    }
-    let scale = (MAX_TEX as f32 / w as f32).min(MAX_TEX as f32 / h as f32);
-    image::imageops::resize(
-        &img,
-        (w as f32 * scale) as u32,
-        (h as f32 * scale) as u32,
-        image::imageops::FilterType::Triangle,
-    )
-}

src/review.rs

@@ -1,345 +0,0 @@
-//! After-capture review window.
-//!
-//! Performance design:
-//! - Effects (rounded corners, drop shadow) run on a background thread so the
-//!   UI never blocks. A `Receiver` is polled each frame; when the result
-//!   arrives the texture is swapped out.
-//! - A debounce timer (`dirty_since`) ensures we only spawn a new worker 150 ms
-//!   after the last slider change, not on every incremental drag tick.
-//! - The raw image is wrapped in Arc so it is shared with worker threads
-//!   without cloning the pixel data.
-//! - Texture uploads are guarded by MAX_TEX so we never panic on large images.
-
-use std::path::PathBuf;
-use std::sync::{Arc, mpsc};
-use std::time::{Duration, Instant};
-
-use arboard::{Clipboard, ImageData};
-use eframe::egui::{self, Color32, ColorImage, Rounding, ScrollArea, Stroke, TextureHandle, TextureOptions, Vec2};
-use image::RgbaImage;
-
-use crate::{config::Config, effects::apply_effects};
-
-const MAX_TEX: u32 = 8192;
-/// How long to wait after the last setting change before spawning the worker.
-const DEBOUNCE: Duration = Duration::from_millis(150);
-
-#[derive(Debug)]
-pub enum ReviewAction {
-    #[allow(dead_code)] // path stored for future use (e.g. desktop notification)
-    Saved(PathBuf),
-    Copied,
-    Discarded,
-}
-
-/// Channel message from the background effects worker.
-struct EffectsResult(RgbaImage);
-
-pub struct ReviewWindow {
-    /// Full-resolution raw capture — shared with worker threads via Arc.
-    raw_image: Arc<RgbaImage>,
-    /// Last fully-processed preview (what gets saved/copied).
-    preview_image: Arc<RgbaImage>,
-    /// GPU texture (may be downscaled for display).
-    preview_texture: TextureHandle,
-    pub config: Config,
-    save_as_path: String,
-    status_message: Option<String>,
-    pub action: Option<ReviewAction>,
-    settings_open: bool,
-
-    /// Set when settings change; cleared when a worker is spawned.
-    dirty_since: Option<Instant>,
-    /// Receives the processed image from the background worker.
-    worker_rx: Option<mpsc::Receiver<EffectsResult>>,
-    /// True while a worker is running.
-    worker_running: bool,
-}
-
-impl ReviewWindow {
-    pub fn new(cc: &eframe::CreationContext<'_>, raw_image: RgbaImage, config: Config) -> Self {
-        let raw = Arc::new(raw_image);
-        let preview = Arc::new(apply_effects((*raw).clone(), &config.effects));
-        let texture = upload_texture(&cc.egui_ctx, &preview);
-        let save_as_path = config.output_path().display().to_string();
-        Self {
-            raw_image: raw,
-            preview_image: preview,
-            preview_texture: texture,
-            config,
-            save_as_path,
-            status_message: None,
-            action: None,
-            settings_open: false,
-            dirty_since: None,
-            worker_rx: None,
-            worker_running: false,
-        }
-    }
-
-    /// Mark settings as changed. A worker will be spawned after the debounce.
-    fn mark_dirty(&mut self) {
-        // Only reset the timer if we're not already waiting (avoids pushing
-        // the debounce out indefinitely on fast slider drag).
-        if self.dirty_since.is_none() {
-            self.dirty_since = Some(Instant::now());
-        }
-    }
-
-    /// Poll for a finished worker result and/or spawn a new one if due.
-    fn tick_effects(&mut self, ctx: &egui::Context) {
-        // 1. Check if the running worker is done.
-        if let Some(rx) = &self.worker_rx {
-            if let Ok(EffectsResult(img)) = rx.try_recv() {
-                let img = Arc::new(img);
-                self.preview_texture = upload_texture(ctx, &img);
-                self.preview_image = img;
-                self.worker_rx = None;
-                self.worker_running = false;
-            }
-        }
-
-        // 2. Spawn a new worker if debounce has elapsed and none is running.
-        if let Some(since) = self.dirty_since {
-            if !self.worker_running && since.elapsed() >= DEBOUNCE {
-                self.dirty_since = None;
-                self.worker_running = true;
-
-                let raw = Arc::clone(&self.raw_image);
-                let effects_cfg = self.config.effects.clone();
-                let (tx, rx) = mpsc::channel();
-                let ctx_clone = ctx.clone();
-
-                std::thread::spawn(move || {
-                    let result = apply_effects((*raw).clone(), &effects_cfg);
-                    let _ = tx.send(EffectsResult(result));
-                    // Wake the egui event loop so the new texture is picked up.
-                    ctx_clone.request_repaint();
-                });
-
-                self.worker_rx = Some(rx);
-            }
-
-            // Keep repainting while waiting for the debounce to fire.
-            if self.worker_running || self.dirty_since.is_some() {
-                ctx.request_repaint_after(Duration::from_millis(50));
-            }
-        }
-    }
-
-    fn copy_to_clipboard(&mut self) {
-        match Clipboard::new() {
-            Ok(mut cb) => {
-                let (w, h) = self.preview_image.dimensions();
-                let bytes = self.preview_image.as_raw().clone();
-                match cb.set_image(ImageData { width: w as usize, height: h as usize, bytes: bytes.into() }) {
-                    Ok(_) => {
-                        self.status_message = Some("Copied to clipboard.".into());
-                        self.action = Some(ReviewAction::Copied);
-                    }
-                    Err(e) => self.status_message = Some(format!("Clipboard error: {e}")),
-                }
-            }
-            Err(e) => self.status_message = Some(format!("Could not open clipboard: {e}")),
-        }
-    }
-
-    fn save_to_path(&mut self, path: PathBuf) {
-        if let Some(parent) = path.parent() {
-            if let Err(e) = std::fs::create_dir_all(parent) {
-                self.status_message = Some(format!("Could not create directory: {e}"));
-                return;
-            }
-        }
-        match self.preview_image.save(&path) {
-            Ok(_) => {
-                self.status_message = Some(format!("Saved to {}", path.display()));
-                self.action = Some(ReviewAction::Saved(path));
-            }
-            Err(e) => self.status_message = Some(format!("Save error: {e}")),
-        }
-    }
-}
-
-impl eframe::App for ReviewWindow {
-    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
-        self.tick_effects(ctx);
-
-        // ── Global keybinds ───────────────────────────────────────────────────
-        // Ctrl+C — copy to clipboard immediately.
-        // Checked before any panel so it works regardless of widget focus.
-        if ctx.input_mut(|i| i.consume_key(egui::Modifiers::CTRL, egui::Key::C)) {
-            self.copy_to_clipboard();
-        }
-
-        // ── Top bar ───────────────────────────────────────────────────────────
-        egui::TopBottomPanel::top("actions").show(ctx, |ui| {
-            ui.add_space(6.0);
-            ui.horizontal(|ui| {
-                if ui.button("📋  Copy").clicked() {
-                    self.copy_to_clipboard();
-                }
-                if ui.button("💾  Save").clicked() {
-                    let path = self.config.output_path();
-                    self.save_to_path(path);
-                }
-                ui.separator();
-                ui.label("Save As:");
-                ui.add(
-                    egui::TextEdit::singleline(&mut self.save_as_path)
-                        .desired_width(300.0)
-                        .hint_text("/home/user/Pictures/shot.png"),
-                );
-                if ui.button("Save").clicked() {
-                    let path = PathBuf::from(&self.save_as_path);
-                    self.save_to_path(path);
-                }
-                ui.separator();
-                let label = if self.settings_open { "▲ Effects" } else { "▼ Effects" };
-                if ui.button(label).clicked() {
-                    self.settings_open = !self.settings_open;
-                }
-                // Spinner while worker is active.
-                if self.worker_running {
-                    ui.spinner();
-                }
-                ui.separator();
-                if ui.button("✖  Discard").clicked() {
-                    self.action = Some(ReviewAction::Discarded);
-                    ctx.send_viewport_cmd(egui::ViewportCommand::Close);
-                }
-            });
-            ui.add_space(4.0);
-        });
-
-        // ── Effects panel ─────────────────────────────────────────────────────
-        if self.settings_open {
-            egui::TopBottomPanel::top("settings").show(ctx, |ui| {
-                ui.add_space(6.0);
-                ui.heading("Effects");
-                ui.separator();
-
-                let e = &mut self.config.effects;
-                let mut changed = false;
-
-                ui.horizontal(|ui| {
-                    changed |= ui.checkbox(&mut e.rounded_corners, "Rounded corners").changed();
-                    if e.rounded_corners {
-                        ui.label("Radius:");
-                        changed |= ui
-                            .add(egui::Slider::new(&mut e.corner_radius, 1.0..=64.0).suffix(" px"))
-                            .changed();
-                    }
-                });
-
-                ui.horizontal(|ui| {
-                    changed |= ui.checkbox(&mut e.drop_shadow, "Drop shadow").changed();
-                    if e.drop_shadow {
-                        ui.label("Blur:");
-                        changed |= ui
-                            .add(egui::Slider::new(&mut e.shadow_blur_radius, 0.0..=60.0).suffix(" px"))
-                            .changed();
-                        ui.label("X:");
-                        changed |= ui
-                            .add(egui::Slider::new(&mut e.shadow_offset_x, -40.0..=40.0).suffix(" px"))
-                            .changed();
-                        ui.label("Y:");
-                        changed |= ui
-                            .add(egui::Slider::new(&mut e.shadow_offset_y, -40.0..=40.0).suffix(" px"))
-                            .changed();
-                    }
-                });
-
-                if changed {
-                    self.mark_dirty();
-                    let _ = self.config.save();
-                }
-                ui.add_space(4.0);
-            });
-        }
-
-        // ── Status bar ────────────────────────────────────────────────────────
-        if let Some(msg) = self.status_message.clone() {
-            egui::TopBottomPanel::bottom("status").show(ctx, |ui| {
-                ui.add_space(4.0);
-                ui.horizontal(|ui| {
-                    ui.label(egui::RichText::new(&msg).color(Color32::LIGHT_GREEN));
-                    if ui.small_button("✖").clicked() {
-                        self.status_message = None;
-                    }
-                });
-                ui.add_space(4.0);
-            });
-        }
-
-        // ── Preview ───────────────────────────────────────────────────────────
-        egui::CentralPanel::default().show(ctx, |ui| {
-            ScrollArea::both().show(ui, |ui| {
-                let tex_size = self.preview_texture.size_vec2();
-                let available = ui.available_size();
-                let scale = (available.x / tex_size.x)
-                    .min(available.y / tex_size.y)
-                    .min(1.0);
-                let display_size = tex_size * scale;
-                let img_rect = ui.allocate_space(display_size).1;
-
-                draw_checkerboard(ui.painter(), img_rect);
-                ui.painter().image(
-                    self.preview_texture.id(),
-                    img_rect,
-                    egui::Rect::from_min_max(egui::Pos2::ZERO, egui::Pos2::new(1.0, 1.0)),
-                    Color32::WHITE,
-                );
-                ui.painter().rect_stroke(
-                    img_rect,
-                    Rounding::ZERO,
-                    Stroke::new(1.0, Color32::from_gray(80)),
-                );
-            });
-        });
-
-        // Close after save/copy — give one extra frame so the status message
-        // is visible for a moment.
-        if let Some(ReviewAction::Saved(_) | ReviewAction::Copied) = &self.action {
-            ctx.send_viewport_cmd(egui::ViewportCommand::Close);
-        }
-    }
-}
-
-// ─── Helpers ─────────────────────────────────────────────────────────────────
-
-fn upload_texture(ctx: &egui::Context, img: &RgbaImage) -> TextureHandle {
-    let (w, h) = img.dimensions();
-    let scaled;
-    let src: &RgbaImage = if w > MAX_TEX || h > MAX_TEX {
-        let s = (MAX_TEX as f32 / w as f32).min(MAX_TEX as f32 / h as f32);
-        scaled = image::imageops::resize(
-            img,
-            (w as f32 * s) as u32,
-            (h as f32 * s) as u32,
-            image::imageops::FilterType::Triangle,
-        );
-        &scaled
-    } else {
-        img
-    };
-    let (uw, uh) = src.dimensions();
-    let ci = ColorImage::from_rgba_unmultiplied([uw as usize, uh as usize], src.as_raw());
-    ctx.load_texture("preview", ci, TextureOptions::LINEAR)
-}
-
-fn draw_checkerboard(painter: &egui::Painter, rect: egui::Rect) {
-    let tile = 8.0_f32;
-    let c0 = Color32::from_gray(200);
-    let c1 = Color32::from_gray(160);
-    let cols = (rect.width() / tile).ceil() as u32;
-    let rows = (rect.height() / tile).ceil() as u32;
-    for row in 0..rows {
-        for col in 0..cols {
-            let color = if (row + col) % 2 == 0 { c0 } else { c1 };
-            let min = rect.min + Vec2::new(col as f32 * tile, row as f32 * tile);
-            let max = (min + Vec2::splat(tile)).min(rect.max);
-            painter.rect_filled(egui::Rect::from_min_max(min, max), Rounding::ZERO, color);
-        }
-    }
-}

src/state.rs

@@ -0,0 +1,192 @@
+use windows::Win32::Foundation::POINT;
+
+pub const ZOOM_MIN: f32 = 1.5;
+pub const ZOOM_MAX: f32 = 10.0;
+pub const ZOOM_STEP: f32 = 0.5;
+
+const EDGE_MARGIN: f32 = 0.10;
+const PAN_ALPHA: f32 = 0.20;
+const ZOOM_ALPHA: f32 = 0.18;
+const ZOOM_EPSILON: f32 = 0.01;
+const CURSOR_ALPHA: f32 = 0.35;
+const MOUSE_MOVE_THRESHOLD_SQ: i32 = 6 * 6;
+const MOUSE_TAKEOVER_TICKS: u32 = 4;
+/// Ticks of mouse stillness before caret re-takes focus (if caret present). ~240 ms.
+const CARET_REFOCUS_TICKS: u32 = 15;
+
+pub struct AppState {
+    pub zoom: f32,
+    target_zoom: f32,
+    prev_zoom: f32,
+    pub active: bool,
+
+    pub cursor: POINT,
+    prev_cursor: POINT,
+    smooth_cursor_x: f32,
+    smooth_cursor_y: f32,
+
+    pub caret: Option<POINT>,
+    prev_caret: Option<POINT>,
+    pub caret_active: bool,
+    mouse_move_ticks: u32,
+    mouse_still_ticks: u32,
+
+    pub viewport_x: f32,
+    pub viewport_y: f32,
+}
+
+impl AppState {
+    pub fn new() -> Self {
+        Self {
+            zoom: 1.0,
+            target_zoom: 1.0,
+            prev_zoom: 1.0,
+            active: false,
+            cursor: POINT { x: 0, y: 0 },
+            prev_cursor: POINT { x: 0, y: 0 },
+            smooth_cursor_x: 0.0,
+            smooth_cursor_y: 0.0,
+            caret: None,
+            prev_caret: None,
+            caret_active: false,
+            mouse_move_ticks: 0,
+            mouse_still_ticks: 0,
+            viewport_x: 0.0,
+            viewport_y: 0.0,
+        }
+    }
+
+    pub fn update(&mut self, _just_activated: bool) {
+        // Animate zoom.
+        if self.active {
+            let diff = self.target_zoom - self.zoom;
+            if diff.abs() < ZOOM_EPSILON {
+                self.zoom = self.target_zoom;
+                if self.zoom <= 1.0 {
+                    self.zoom = 1.0;
+                    self.active = false;
+                }
+            } else {
+                self.zoom += diff * ZOOM_ALPHA;
+            }
+        }
+
+        // Smooth cursor.
+        self.smooth_cursor_x += (self.cursor.x as f32 - self.smooth_cursor_x) * CURSOR_ALPHA;
+        self.smooth_cursor_y += (self.cursor.y as f32 - self.smooth_cursor_y) * CURSOR_ALPHA;
+
+        // Caret / mouse priority.
+        let dx = self.cursor.x - self.prev_cursor.x;
+        let dy = self.cursor.y - self.prev_cursor.y;
+        let intentional = dx * dx + dy * dy >= MOUSE_MOVE_THRESHOLD_SQ;
+
+        let caret_moved = match (self.caret, self.prev_caret) {
+            (Some(c), Some(p)) => c.x != p.x || c.y != p.y,
+            (Some(_), None) => true,
+            _ => false,
+        };
+
+        if intentional {
+            self.mouse_move_ticks += 1;
+            self.mouse_still_ticks = 0;
+        } else {
+            self.mouse_move_ticks = 0;
+            self.mouse_still_ticks += 1;
+        }
+
+        if self.mouse_move_ticks >= MOUSE_TAKEOVER_TICKS {
+            self.caret_active = false;
+            self.mouse_move_ticks = 0;
+        }
+        // Re-engage caret once mouse has been still long enough.
+        if self.mouse_still_ticks >= CARET_REFOCUS_TICKS && self.caret.is_some() {
+            self.caret_active = true;
+        }
+        if caret_moved {
+            self.caret_active = true;
+            self.mouse_move_ticks = 0;
+        }
+
+        self.prev_cursor = self.cursor;
+        self.prev_caret = self.caret;
+    }
+
+    pub fn update_viewport(
+        &mut self,
+        src_w: f32,
+        src_h: f32,
+        screen_w: f32,
+        screen_h: f32,
+        just_activated: bool,
+    ) {
+        let (fx, fy) = self.focus_point();
+        let zoom_changed = (self.zoom - self.prev_zoom).abs() > f32::EPSILON;
+        self.prev_zoom = self.zoom;
+
+        if just_activated {
+            self.viewport_x = (fx - src_w / 2.0).clamp(0.0, (screen_w - src_w).max(0.0));
+            self.viewport_y = (fy - src_h / 2.0).clamp(0.0, (screen_h - src_h).max(0.0));
+            return;
+        }
+
+        let (target_x, target_y) = if self.caret_active {
+            // Centre on caret while typing.
+            let tx = (fx - src_w / 2.0).clamp(0.0, (screen_w - src_w).max(0.0));
+            let ty = (fy - src_h / 2.0).clamp(0.0, (screen_h - src_h).max(0.0));
+            (tx, ty)
+        } else if zoom_changed {
+            let tx = (fx - src_w / 2.0).clamp(0.0, (screen_w - src_w).max(0.0));
+            let ty = (fy - src_h / 2.0).clamp(0.0, (screen_h - src_h).max(0.0));
+            (tx, ty)
+        } else {
+            let mx = EDGE_MARGIN * src_w;
+            let my = EDGE_MARGIN * src_h;
+            let tx = self
+                .viewport_x
+                .clamp(fx - src_w + mx, fx - mx)
+                .clamp(0.0, (screen_w - src_w).max(0.0));
+            let ty = self
+                .viewport_y
+                .clamp(fy - src_h + my, fy - my)
+                .clamp(0.0, (screen_h - src_h).max(0.0));
+            (tx, ty)
+        };
+
+        self.viewport_x += (target_x - self.viewport_x) * PAN_ALPHA;
+        self.viewport_y += (target_y - self.viewport_y) * PAN_ALPHA;
+
+        // Hard-clamp every tick so the viewport never overshoots screen bounds
+        // even while the lerp is still catching up (e.g. fast zoom-out).
+        self.viewport_x = self.viewport_x.clamp(0.0, (screen_w - src_w).max(0.0));
+        self.viewport_y = self.viewport_y.clamp(0.0, (screen_h - src_h).max(0.0));
+    }
+
+    pub fn zoom_in(&mut self) {
+        if !self.active {
+            self.target_zoom = ZOOM_MIN;
+            self.zoom = 1.0;
+            self.active = true;
+        } else {
+            self.target_zoom = (self.target_zoom + ZOOM_STEP).min(ZOOM_MAX);
+        }
+    }
+
+    pub fn zoom_out(&mut self) {
+        if !self.active {
+            return;
+        }
+        self.target_zoom -= ZOOM_STEP;
+        if self.target_zoom < ZOOM_MIN {
+            self.target_zoom = 1.0;
+        }
+    }
+
+    fn focus_point(&self) -> (f32, f32) {
+        if self.caret_active {
+            if let Some(c) = self.caret {
+                return (c.x as f32, c.y as f32);
+            }
+        }
+        (self.smooth_cursor_x, self.smooth_cursor_y)
+    }
+}

src/tray.rs

@@ -0,0 +1,70 @@
+use tray_icon::{
+    menu::{Menu, MenuEvent, MenuId, MenuItem},
+    TrayIcon, TrayIconBuilder,
+};
+
+pub struct Tray {
+    _icon: TrayIcon,
+    exit_id: MenuId,
+}
+
+impl Tray {
+    pub fn new() -> Self {
+        let toggle_item = MenuItem::new("Toggle", true, None);
+        let exit_item = MenuItem::new("Exit", true, None);
+
+        let exit_id = exit_item.id().clone();
+
+        let menu = Menu::new();
+        menu.append(&toggle_item)
+            .expect("Failed to append toggle item");
+        menu.append(&exit_item).expect("Failed to append exit item");
+
+        let icon = make_icon();
+
+        let tray = TrayIconBuilder::new()
+            .with_menu(Box::new(menu))
+            .with_tooltip("iwaku magnifier")
+            .with_icon(icon)
+            .build()
+            .expect("Failed to build tray icon");
+
+        Self {
+            _icon: tray,
+            exit_id,
+        }
+    }
+
+    /// Returns `true` if the app should exit.
+    pub fn process_events(&self) -> bool {
+        if let Ok(event) = MenuEvent::receiver().try_recv() {
+            if event.id == self.exit_id {
+                return true;
+            }
+        }
+        false
+    }
+}
+
+fn make_icon() -> tray_icon::Icon {
+    const SIZE: usize = 16;
+    let mut rgba = vec![0u8; SIZE * SIZE * 4];
+
+    for y in 0..SIZE {
+        for x in 0..SIZE {
+            let idx = (y * SIZE + x) * 4;
+            let cx = x as f32 - 7.5;
+            let cy = y as f32 - 7.5;
+            let dist = (cx * cx + cy * cy).sqrt();
+            if (dist - 5.5).abs() < 1.5 {
+                rgba[idx] = 255;
+                rgba[idx + 1] = 255;
+                rgba[idx + 2] = 255;
+                rgba[idx + 3] = 255;
+            }
+        }
+    }
+
+    tray_icon::Icon::from_rgba(rgba, SIZE as u32, SIZE as u32)
+        .expect("Failed to create tray icon from RGBA")
+}

test.rs

@@ -1 +0,0 @@
-fn main() { println!("test"); }

test_viewport.rs

@@ -1,3 +0,0 @@
-fn main() {
-    let _ = eframe::egui::ViewportBuilder::default().with_active(false);
-}