refactor: changed effects, add shell completions

- Extract all apply_* effect methods from screenshot.rs into dedicated
  src/effects.rs (blur, vignette, pixelate, swirl) — screenshot.rs
- Rewrite apply_blur: replace broken fastblur::gaussian_blur (horizontal-
  only box blur, backbuf dropped) with correct inline two-pass sliding-
  window box blur operating directly on Cairo surface bytes — ~10×
  faster, no ImageBuffer round-trip, no fastblur dependency
- Remove melting effect entirely (seems to be hard to implement
  properely, tried multiple itterations)
- Drop unused dependencies: fastblur, rand
- Add clap_complete dependency + --completions {bash,fish,zsh} flag,
  with CompletionShell enum in config.rs
- Fix show_* flags defaulting to true: remove default_value_t=true from
  show_media, show_battery, show_network, show_bluetooth, show_album_art,
  show_caps_lock_text — all now opt-in (matching user expectation)
- Convert peek toggle to hold: toggle_peek() → set_peek_held(held: bool),
  Press calls set_peek_held(true), new Release handler iterates all
  surfaces and calls set_peek_held(false), matching Ctrl-hold behavior
- Fix cursor rendering: increase font size 11→14 for peeked chars,
  handle cursor_position == 0 (prevent negative t wrapping to far ring
  end)
- Fix peek hit-test: use shape-aware point_in_shape() instead of simple
  circle pill/square/diamond/hexagon now detect clicks correctly within
  their area
- Remove per-frame DEBUG logs: PEEK/DOT mode in lock.rs,
  set_password_display/peek_password in render/mod.rs
- Update README: embed rustlock-effects.webp demo, remove melting
  references, correct show_* defaults and options table

.github/dependabot.yml

@@ -16,7 +16,7 @@ updates:
       prefix: "deps"
     reviewers:
       - "JorySeverijnse"
-    versioning-strategy: "increase"
+    versioning-strategy: "auto"
     groups:
       rust-dependencies:
         patterns:

.github/workflows/nightly-release.yml

@@ -14,10 +14,16 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
 
+      - uses: ./.github/actions/deps
+
+      - uses: Swatinem/rust-cache@v2
+
+      - uses: dtolnay/rust-toolchain@stable
+
       - name: Set version
         id: version
         run: |
@@ -26,10 +32,19 @@ jobs:
           VERSION=$(grep -m1 '^version =' Cargo.toml | cut -d'"' -f2)
           echo "VERSION=${VERSION}-nightly.$DATE.$SHA" >> $GITHUB_OUTPUT
 
+      - name: Build release binary
+        run: cargo build --release
+
+      - name: Upload binary
+        uses: actions/upload-artifact@v4
+        with:
+          name: rustlock-${{ steps.version.outputs.VERSION }}
+          path: target/release/rustlock
+
       - name: Create nightly release
         uses: softprops/action-gh-release@v3
         with:
-          tag_name: nightly-${{ steps.version.outputs.VERSION }}
+          tag_name: ${{ steps.version.outputs.VERSION }}
           name: Nightly Build ${{ steps.version.outputs.VERSION }}
           prerelease: true
           generate_release_notes: true

.github/workflows/quality.yml

@@ -14,7 +14,7 @@ jobs:
   quality-checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: ./.github/actions/deps
 
@@ -31,9 +31,6 @@ jobs:
       - name: Run clippy
         run: cargo clippy --all-targets -- -D warnings
 
-      - name: Run unit tests (default features)
-        run: cargo test --quiet
-
       - name: Run unit tests (all features)
         run: cargo test --all-features --quiet
 

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Determine tag
         id: tag
@@ -29,13 +29,21 @@ jobs:
   publish-crates:
     runs-on: ubuntu-latest
     needs: [release]
-    if: secrets.CARGO_REGISTRY_TOKEN != ''
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
+
+      - uses: ./.github/actions/deps
+
+      - uses: Swatinem/rust-cache@v2
 
       - uses: dtolnay/rust-toolchain@stable
 
       - name: Publish to crates.io
         env:
           CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
-        run: cargo publish
+        run: |
+          if [ -z "$CARGO_REGISTRY_TOKEN" ]; then
+            echo "CARGO_REGISTRY_TOKEN not set — skipping publish"
+            exit 0
+          fi
+          cargo publish

.github/workflows/security.yml

@@ -11,6 +11,14 @@ on:
       - 'Cargo.lock'
       - 'deny.toml'
       - '.github/workflows/security.yml'
+  pull_request:
+    branches: [main, master]
+    paths:
+      - 'Cargo.toml'
+      - 'Cargo.lock'
+      - 'deny.toml'
+      - '.github/workflows/security.yml'
+    types: [opened, synchronize, reopened]
 
 env:
   CARGO_TERM_COLOR: always
@@ -19,7 +27,7 @@ jobs:
   security-audit:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
@@ -39,4 +47,3 @@ jobs:
 
       - name: Check for outdated dependencies
         run: cargo outdated --exit-code 1 || echo "Some dependencies are outdated"
-

.pre-commit-config.yaml

@@ -0,0 +1,28 @@
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: trailing-whitespace
+        exclude: \.md$
+      - id: end-of-file-fixer
+      - id: check-yaml
+      - id: check-toml
+      - id: check-added-large-files
+        exclude: ^assets/
+      - id: check-merge-conflict
+
+  - repo: local
+    hooks:
+      - id: fmt
+        name: cargo fmt
+        entry: cargo fmt
+        args: ["--", "--check"]
+        language: system
+        types: [rust]
+        pass_filenames: false
+      - id: clippy
+        name: cargo clippy
+        entry: cargo clippy
+        args: ["--", "-D", "warnings"]
+        language: system
+        pass_filenames: false

Cargo.toml

@@ -16,6 +16,7 @@ cairo-rs = { version = "0.20", default-features = false, features = ["png"] }
 gdk-pixbuf = { version = "0.20", default-features = false, features = ["v2_40"] }
 pangocairo = { version = "0.20" }
 clap = { version = "4.6", default-features = false, features = ["derive", "std", "help", "usage", "error-context"] }
+clap_complete = { version = "4.6", default-features = false }
 toml = { version = "1.1", default-features = false, features = ["parse", "display", "serde"] }
 serde = { version = "1.0", default-features = false, features = ["derive", "std"] }
 zeroize = "1.8"
@@ -25,10 +26,8 @@ whoami = "1.6"
 zbus = { version = "5.14", default-features = false, features = ["tokio"] }
 mpris = "2.0"
 tokio = { version = "1.51", default-features = false, features = ["rt", "rt-multi-thread", "macros", "time", "sync"] }
-rand = { version = "0.10" }
 reqwest = { version = "0.12", default-features = false, features = ["blocking", "rustls-tls"], optional = true }
 image = { version = "0.25", default-features = false, features = ["png", "jpeg"] }
-    fastblur = "0.1"
 pam-client = "0.5"
     calloop = "0.13"
     xkbcommon = "0.7"

README.md

@@ -1,10 +1,14 @@
 # 🔒 RustLock
 
-[![License](https://img.shields.io/badge/license-AGPL--3.0%2B-blue.svg)](https://github.com/yourusername/rustlock/blob/main/LICENSE)
+[![License](https://img.shields.io/badge/license-GPL-3.0-blue.svg)](https://github.com/yourusername/rustlock/blob/main/LICENSE)
 [![Version](https://img.shields.io/badge/version-0.1.0-green.svg)](https://github.com/yourusername/rustlock/releases)
 
 A high-performance Wayland screen locker written in Rust, inspired by `swaylock-effects`.
 
+<p align="center">
+  <img src="assets/rustlock-effects.webp" alt="RustLock effects demo" width="800">
+</p>
+
 ---
 
 ## ✨ Features
@@ -13,7 +17,7 @@ A high-performance Wayland screen locker written in Rust, inspired by `swaylock-
 - 🎨 **Visual Effects**:
   - Gaussian blur (configurable radius and passes)
   - Vignette effect (configurable base and factor)
-  - Pixelate, Swirl, and Melting effects
+  - Pixelate and Swirl effects
   - Smooth fade-in animation
 - 🔐 **Password Indicator**:
   - Circular ring with configurable radius and thickness
@@ -123,7 +127,6 @@ Options can be provided via command line or a configuration file at `~/.config/r
 | `--effect-vignette <B>:<F>` | — | Vignette: base : factor (e.g., `0.5:0.5`) |
 | `--effect-pixelate <S>` | — | Pixelate effect with block size in pixels |
 | `--effect-swirl <A>` | — | Swirl distortion with angle |
-| `--effect-melting <F>` | — | Melting distortion with factor |
 | **Colors** (hex `RRGGBB[AA]`) | | |
 | `--ring-color <HEX>` | `#785412` | Outer ring color |
 | `--line-color <HEX>` | `#00000000` | Separator line color |
@@ -135,14 +138,14 @@ Options can be provided via command line or a configuration file at `~/.config/r
 | `--caps-lock-color <HEX>` | `#E5A445` | Caps lock indicator ring color |
 | `--caps-lock-text-color <HEX>` | `#E5A445` | Caps lock text color |
 | `--verifying-color <HEX>` | `#0072FF` | Verifying feedback ring color |
-| `--show-caps-lock-text` | `true` | Show "CAPS" text when caps lock is active |
+| `--show-caps-lock-text` | `false` | Show "CAPS" text when caps lock is active |
 | **Display** | | |
-| `--show-media` | `true` | Show MPRIS media player information |
+| `--show-media` | `false` | Show MPRIS media player information |
-| `--show-battery` | `true` | Show battery status |
+| `--show-battery` | `false` | Show battery status |
-| `--show-network` | `true` | Show WiFi SSID and signal strength |
+| `--show-network` | `false` | Show WiFi SSID and signal strength |
-| `--show-bluetooth` | `true` | Show Bluetooth status |
+| `--show-bluetooth` | `false` | Show Bluetooth status |
-| `--show-album-art` | `true` | Show album art for media |
+| `--show-album-art` | `false` | Show album art for media |
-| `--show-keyboard-layout` | `true` | Show keyboard layout indicator |
+| `--show-keyboard-layout` | `false` | Show keyboard layout indicator |
 | **Feedback & Timing** | | |
 | `--fade-in <SECONDS>` | `0.2` | Fade-in animation duration |
 | `--grace <SECONDS>` | `0` | Grace period — any key press unlocks within N seconds |

flake.nix

@@ -28,8 +28,27 @@
       nativeBuildInputs = [
         pkgs.pkg-config
         pkgs.rustPlatform.bindgenHook
-        pkgs.rustfmt
+      ];
-        pkgs.clippy
+    };
+
+    devShells.${system}.default = pkgs.mkShell {
+      packages = with pkgs; [
+        cargo
+        rustc
+        rustfmt
+        clippy
+        cargo-audit
+        cargo-deny
+        prek
+        pkg-config
+        rustPlatform.bindgenHook
+        cairo
+        pam
+        gdk-pixbuf
+        librsvg
+        pango
+        libxkbcommon
+        dbus
       ];
     };
   };

src/auth.rs

@@ -13,7 +13,8 @@ use zeroize::Zeroizing;
 type AuthChannels = (
     channel::Sender<(Zeroizing<String>, u64)>,
     channel::Channel<(bool, u64)>,
-);pub struct LockConversation {
+);
+pub struct LockConversation {
     pub password: Option<Zeroizing<String>>,
 }
 
@@ -39,13 +40,10 @@ impl pam_client::ConversationHandler for LockConversation {
     }
 }
 
-pub fn create_and_run_auth_loop(
+pub fn create_and_run_auth_loop(service_name: String) -> Option<AuthChannels> {
-    service_name: String,
-) -> Option<AuthChannels> {
     let username = username();
 
-    let (auth_req_send, auth_req_recv) =
+    let (auth_req_send, auth_req_recv) = channel::channel::<(Zeroizing<String>, u64)>();
-        channel::channel::<(Zeroizing<String>, u64)>();
     let (auth_res_send, auth_res_recv) = channel::channel::<(bool, u64)>();
 
     thread::spawn(move || {
@@ -55,7 +53,8 @@ pub fn create_and_run_auth_loop(
         // Creating a new context each time is expensive because it
         // re-parses configs and re-loads shared libraries for every attempt.
         let conversation = LockConversation { password: None };
-        let mut context = match Context::new(service_name.as_str(), Some(username.as_str()), conversation) {
+        let mut context =
+            match Context::new(service_name.as_str(), Some(username.as_str()), conversation) {
                 Ok(ctx) => {
                     debug!("Prepared to authenticate user '{}'", username);
                     ctx

src/config.rs

@@ -45,6 +45,13 @@ impl fmt::Display for RingShape {
     }
 }
 
+#[derive(Debug, Clone, Copy, PartialEq, clap::ValueEnum)]
+pub enum CompletionShell {
+    Bash,
+    Fish,
+    Zsh,
+}
+
 #[derive(Parser, Debug, Clone, Serialize, Deserialize)]
 #[command(author, version, about, long_about = None)]
 pub struct Config {
@@ -91,10 +98,6 @@ pub struct Config {
     #[serde(default)]
     pub effect_swirl: Option<f32>,
 
-    #[arg(long)]
-    #[serde(default)]
-    pub effect_melting: Option<f32>,
-
     #[arg(long, default_value = "785412", value_parser = util::parse_hex_color)]
     #[serde(
         deserialize_with = "util::deserialize_hex_color",
@@ -144,7 +147,7 @@ pub struct Config {
     )]
     pub verifying_color: (f64, f64, f64, f64),
 
-    #[arg(long, action = clap::ArgAction::SetTrue, default_value_t = true)]
+    #[arg(long, action = clap::ArgAction::SetTrue)]
     pub show_caps_lock_text: bool,
 
     #[arg(long, default_value = "00000000", value_parser = util::parse_hex_color)]
@@ -196,19 +199,19 @@ pub struct Config {
     #[arg(long, default_value = "10000")]
     pub auth_timeout: u64,
 
-    #[arg(long, action = clap::ArgAction::SetTrue, default_value_t = true)]
+    #[arg(long, action = clap::ArgAction::SetTrue)]
     pub show_media: bool,
 
-    #[arg(long, action = clap::ArgAction::SetTrue, default_value_t = true)]
+    #[arg(long, action = clap::ArgAction::SetTrue)]
     pub show_battery: bool,
 
-    #[arg(long, action = clap::ArgAction::SetTrue, default_value_t = true)]
+    #[arg(long, action = clap::ArgAction::SetTrue)]
     pub show_network: bool,
 
-    #[arg(long, action = clap::ArgAction::SetTrue, default_value_t = true)]
+    #[arg(long, action = clap::ArgAction::SetTrue)]
     pub show_bluetooth: bool,
 
-    #[arg(long, action = clap::ArgAction::SetTrue, default_value_t = true)]
+    #[arg(long, action = clap::ArgAction::SetTrue)]
     pub show_album_art: bool,
 
     #[arg(long, action = clap::ArgAction::SetTrue)]
@@ -293,6 +296,10 @@ pub struct Config {
     #[arg(long, default_value = "5")]
     pub command_timeout: u64,
 
+    /// Generate shell completions for the given shell
+    #[arg(long, value_enum)]
+    #[serde(skip)]
+    pub completions: Option<CompletionShell>,
 }
 
 impl Config {
@@ -300,6 +307,26 @@ impl Config {
         use clap::CommandFactory;
 
         let mut config = Config::parse();
+
+        // Handle --completions early (before config file merge so file can't inject it)
+        if let Some(shell) = config.completions {
+            use clap_complete::Shell;
+            let mut cmd = Config::command();
+            let name = "rustlock";
+            match shell {
+                CompletionShell::Bash => {
+                    clap_complete::generate(Shell::Bash, &mut cmd, name, &mut std::io::stdout())
+                }
+                CompletionShell::Fish => {
+                    clap_complete::generate(Shell::Fish, &mut cmd, name, &mut std::io::stdout())
+                }
+                CompletionShell::Zsh => {
+                    clap_complete::generate(Shell::Zsh, &mut cmd, name, &mut std::io::stdout())
+                }
+            }
+            std::process::exit(0);
+        }
+
         let cmd = Config::command();
         let matches = cmd.get_matches();
 
@@ -347,7 +374,6 @@ impl Config {
 
         config
     }
-
 }
 
 #[cfg(test)]

src/effects.rs

@@ -0,0 +1,285 @@
+//! Visual effects for lock screen backgrounds.
+//!
+//! Each effect takes a `&mut ImageSurface` and processes it in-place.
+//! Effects are applied in order: blur → vignette → pixelate → swirl.
+
+use anyhow::{Context, Result};
+use cairo::ImageSurface;
+
+/// Apply a swirl effect (radial rotation around the image centre).
+pub fn apply_swirl(surface: &mut ImageSurface, angle: f32) -> Result<()> {
+    let width = surface.width();
+    let height = surface.height();
+    let center_x = width as f32 / 2.0;
+    let center_y = height as f32 / 2.0;
+    let radius = center_x.min(center_y);
+
+    let stride = surface.stride() as usize;
+    let mut data = vec![0u8; stride * height as usize];
+    surface
+        .with_data(|src| data.copy_from_slice(src))
+        .context("swirl: failed to read surface data")?;
+    let original = data.clone();
+
+    for y in 0..height {
+        for x in 0..width {
+            let dx = x as f32 - center_x;
+            let dy = y as f32 - center_y;
+            let d = (dx * dx + dy * dy).sqrt();
+
+            if d < radius {
+                let percent = (radius - d) / radius;
+                let theta = percent * percent * angle;
+                let s = theta.sin();
+                let c = theta.cos();
+
+                let nx = (c * dx - s * dy + center_x) as i32;
+                let ny = (s * dx + c * dy + center_y) as i32;
+
+                if nx >= 0 && nx < width && ny >= 0 && ny < height {
+                    let src_idx = (ny as usize * stride) + (nx as usize * 4);
+                    let dst_idx = (y as usize * stride) + (x as usize * 4);
+                    data[dst_idx..dst_idx + 4].copy_from_slice(&original[src_idx..src_idx + 4]);
+                }
+            }
+        }
+    }
+
+    let mut surface_data = surface
+        .data()
+        .context("swirl: failed to write surface data")?;
+    surface_data.copy_from_slice(&data);
+    Ok(())
+}
+
+/// Pixelate the surface.
+pub fn apply_pixelate(surface: &mut ImageSurface, pixel_size: u32) -> Result<()> {
+    if pixel_size <= 1 {
+        return Ok(());
+    }
+
+    let width = surface.width();
+    let height = surface.height();
+    let stride = surface.stride() as usize;
+    let mut data = vec![0u8; stride * height as usize];
+    surface
+        .with_data(|src| data.copy_from_slice(src))
+        .context("pixelate: failed to read surface data")?;
+
+    for y in (0..height).step_by(pixel_size as usize) {
+        for x in (0..width).step_by(pixel_size as usize) {
+            let mut r = 0u32;
+            let mut g = 0u32;
+            let mut b = 0u32;
+            let mut count = 0u32;
+
+            // Average pixels in the block
+            for py in 0..pixel_size {
+                for px in 0..pixel_size {
+                    let cur_x = x + px as i32;
+                    let cur_y = y + py as i32;
+                    if cur_x < width && cur_y < height {
+                        let index = (cur_y as usize * stride) + (cur_x as usize * 4);
+                        r += data[index] as u32;
+                        g += data[index + 1] as u32;
+                        b += data[index + 2] as u32;
+                        count += 1;
+                    }
+                }
+            }
+
+            if count > 0 {
+                let r = r.checked_div(count).unwrap_or(0) as u8;
+                let g = g.checked_div(count).unwrap_or(0) as u8;
+                let b = b.checked_div(count).unwrap_or(0) as u8;
+
+                // Fill the block
+                for py in 0..pixel_size {
+                    for px in 0..pixel_size {
+                        let cur_x = x + px as i32;
+                        let cur_y = y + py as i32;
+                        if cur_x < width && cur_y < height {
+                            let index = (cur_y as usize * stride) + (cur_x as usize * 4);
+                            data[index] = r;
+                            data[index + 1] = g;
+                            data[index + 2] = b;
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    let mut surface_data = surface
+        .data()
+        .context("pixelate: failed to write surface data")?;
+    surface_data.copy_from_slice(&data);
+    Ok(())
+}
+
+/// Apply a box blur effect (fast two-pass sliding-window implementation).
+/// Uses multiply-shift to avoid slow integer division in the hot loop.
+pub fn apply_blur(surface: &mut ImageSurface, radius: u32, times: u32) -> Result<()> {
+    if radius == 0 || times == 0 {
+        return Ok(());
+    }
+
+    let width = surface.width() as usize;
+    let height = surface.height() as usize;
+    let stride = surface.stride() as usize;
+    let r = radius as usize;
+
+    let mut data = vec![0u8; stride * height];
+    surface
+        .with_data(|src| data.copy_from_slice(src))
+        .context("blur: failed to read surface data")?;
+
+    let mut scratch = vec![0u8; stride * height];
+
+    // Precompute ceil(2^32 / c) for every possible window size c.
+    let max_count = (2 * r + 1).min(width.max(height));
+    let factor: Vec<u32> = (0..=max_count)
+        .map(|c| {
+            if c == 0 {
+                0
+            } else {
+                (1u64 << 32).div_ceil(c as u64) as u32
+            }
+        })
+        .collect();
+
+    #[inline(always)]
+    fn div_mul(n: u32, factor: u32) -> u8 {
+        ((n as u64 * factor as u64) >> 32) as u8
+    }
+
+    for _ in 0..times {
+        // Horizontal box blur: data -> scratch
+        for y in 0..height {
+            let row = y * stride;
+            let init_end = r.min(width - 1);
+            let mut b_acc = 0u32;
+            let mut g_acc = 0u32;
+            let mut r_acc = 0u32;
+            for x in 0..=init_end {
+                let px = row + x * 4;
+                b_acc += data[px] as u32;
+                g_acc += data[px + 1] as u32;
+                r_acc += data[px + 2] as u32;
+            }
+            let mut count = (init_end + 1) as u32;
+
+            for x in 0..width {
+                let dst = row + x * 4;
+                let f = factor[count as usize];
+                scratch[dst] = div_mul(b_acc, f);
+                scratch[dst + 1] = div_mul(g_acc, f);
+                scratch[dst + 2] = div_mul(r_acc, f);
+                scratch[dst + 3] = data[dst + 3];
+
+                if x >= r {
+                    let old = row + (x - r) * 4;
+                    b_acc -= data[old] as u32;
+                    g_acc -= data[old + 1] as u32;
+                    r_acc -= data[old + 2] as u32;
+                    count -= 1;
+                }
+                if x + r + 1 < width {
+                    let new = row + (x + r + 1) * 4;
+                    b_acc += data[new] as u32;
+                    g_acc += data[new + 1] as u32;
+                    r_acc += data[new + 2] as u32;
+                    count += 1;
+                }
+            }
+        }
+
+        // Vertical box blur: scratch -> data
+        let init_end = r.min(height - 1);
+        let mut b_acc = vec![0u32; width];
+        let mut g_acc = vec![0u32; width];
+        let mut r_acc = vec![0u32; width];
+        for y in 0..=init_end {
+            let row = y * stride;
+            for x in 0..width {
+                let px = row + x * 4;
+                b_acc[x] += scratch[px] as u32;
+                g_acc[x] += scratch[px + 1] as u32;
+                r_acc[x] += scratch[px + 2] as u32;
+            }
+        }
+        let mut count = (init_end + 1) as u32;
+
+        for y in 0..height {
+            let f = factor[count as usize];
+            let dst_row = y * stride;
+            for x in 0..width {
+                let dst = dst_row + x * 4;
+                data[dst] = div_mul(b_acc[x], f);
+                data[dst + 1] = div_mul(g_acc[x], f);
+                data[dst + 2] = div_mul(r_acc[x], f);
+            }
+
+            if y >= r {
+                let old_row = (y - r) * stride;
+                for x in 0..width {
+                    let px = old_row + x * 4;
+                    b_acc[x] -= scratch[px] as u32;
+                    g_acc[x] -= scratch[px + 1] as u32;
+                    r_acc[x] -= scratch[px + 2] as u32;
+                }
+                count -= 1;
+            }
+            if y + r + 1 < height {
+                let new_row = (y + r + 1) * stride;
+                for x in 0..width {
+                    let px = new_row + x * 4;
+                    b_acc[x] += scratch[px] as u32;
+                    g_acc[x] += scratch[px + 1] as u32;
+                    r_acc[x] += scratch[px + 2] as u32;
+                }
+                count += 1;
+            }
+        }
+    }
+
+    let mut surface_data = surface.data()?;
+    surface_data.copy_from_slice(&data);
+    Ok(())
+}
+
+/// Apply a vignette effect (darken edges).
+pub fn apply_vignette(surface: &mut ImageSurface, base: f32, factor: f32) -> Result<()> {
+    let width = surface.width();
+    let height = surface.height();
+    let center_x = width as f32 / 2.0;
+    let center_y = height as f32 / 2.0;
+    let max_distance = (center_x * center_x + center_y * center_y).sqrt();
+
+    let stride = surface.stride() as usize;
+    let mut data = vec![0u8; stride * height as usize];
+    surface
+        .with_data(|src| data.copy_from_slice(src))
+        .context("vignette: failed to read surface data")?;
+
+    for y in 0..height {
+        for x in 0..width {
+            let dx = x as f32 - center_x;
+            let dy = y as f32 - center_y;
+            let distance = (dx * dx + dy * dy).sqrt();
+            let vignette_factor = base + (1.0 - base) * (distance / max_distance).powf(factor);
+
+            let index = (y as usize * stride) + (x as usize * 4);
+            for i in 0..3 {
+                let value = data[index + i] as f32 * vignette_factor;
+                data[index + i] = value.clamp(0.0, 255.0) as u8;
+            }
+        }
+    }
+
+    let mut surface_data = surface
+        .data()
+        .context("vignette: failed to write surface data")?;
+    surface_data.copy_from_slice(&data);
+    Ok(())
+}

src/input.rs

@@ -165,7 +165,8 @@ impl InputHandler {
     /// Check if key highlight should be shown
     pub fn should_show_key_highlight(&self) -> bool {
         if let Some(timer) = self.key_highlight_timer {
-            timer.elapsed() < std::time::Duration::from_millis(self.config.key_highlight_window_duration)
+            timer.elapsed()
+                < std::time::Duration::from_millis(self.config.key_highlight_window_duration)
         } else {
             false
         }

src/lock.rs

@@ -31,6 +31,9 @@ pub struct LockedSurface {
     /// Last clock minute (unix-minute) we rendered, to detect %H:%M rollover.
     last_minute: i64,
     ctrl_held: bool,
+    /// True while the pointer button is held on the indicator ring (hold-to-peek).
+    /// Cleared on button release, matching Ctrl-hold transient behavior.
+    peek_toggled: bool,
 }
 
 impl LockedSurface {
@@ -64,6 +67,7 @@ impl LockedSurface {
             dirty: true,
             last_minute: i64::MIN,
             ctrl_held: false,
+            peek_toggled: false,
         })
     }
 
@@ -182,10 +186,10 @@ impl LockedSurface {
         }
 
         if !self.config.hide_password {
+            let buf = self.input_handler.password_buffer();
             let length = self.input_handler.password_length();
-            if self.ctrl_held {
+            if self.ctrl_held || self.peek_toggled {
-                self.renderer
+                self.renderer.peek_password(buf.as_str());
-                    .peek_password(self.input_handler.password_buffer().as_str());
             } else {
                 self.renderer.set_password_display(length);
             }
@@ -302,6 +306,15 @@ impl LockedSurface {
             self.dirty = true;
         }
     }
+
+    /// Set peek mode on/off. Called when the user presses (held=true) or
+    /// releases (held=false) the mouse button on the indicator ring. Works
+    /// like Ctrl-hold — peek only lasts while the button is held.
+    pub fn set_peek_held(&mut self, held: bool) {
+        self.peek_toggled = held;
+        log::debug!("set_peek_held: peek_toggled = {}", self.peek_toggled);
+        self.dirty = true;
+    }
 }
 
 pub struct LockManager {

src/main.rs

@@ -1,5 +1,6 @@
 mod auth;
 mod config;
+mod effects;
 mod input;
 mod lock;
 mod render;
@@ -65,9 +66,8 @@ fn setup_file_logging(config: &Config) {
             }
         }
     } else if config.log_file {
-        let default_path = std::path::PathBuf::from(
+        let default_path =
-            std::env::var("HOME").unwrap_or_else(|_| "/tmp".to_string()),
+            std::path::PathBuf::from(std::env::var("HOME").unwrap_or_else(|_| "/tmp".to_string()))
-        )
                 .join(".rustlock.log");
         match OpenOptions::new()
             .create(true)
@@ -506,8 +506,16 @@ impl KeyboardHandler for WaylandLock {
         modifiers: Modifiers,
         layout: u32,
     ) {
+        let ctrl_changed = self.modifiers.ctrl != modifiers.ctrl;
         self.modifiers = modifiers;
         self.current_layout = layout;
+        if ctrl_changed {
+            log::debug!(
+                "update_modifiers: ctrl {} -> {}",
+                !modifiers.ctrl,
+                modifiers.ctrl
+            );
+        }
         if let Ok(mut lock_manager) = self.lock_manager.lock() {
             lock_manager.set_ctrl_held(modifiers.ctrl);
         }
@@ -650,7 +658,10 @@ impl Dispatch<ZwlrScreencopyFrameV1, CaptureData> for WaylandLock {
                         if let Ok(surface) = mgr.buffer_to_surface(handle, &mut pool) {
                             let mut ss = Screenshot::new(surface);
                             if let Err(e) = ss.apply_effects(&state.config) {
-                                log::error!("Failed to apply effects to screenshot {}: {e}", data.output_idx);
+                                log::error!(
+                                    "Failed to apply effects to screenshot {}: {e}",
+                                    data.output_idx
+                                );
                             }
                             if data.output_idx < state.captured_backgrounds.len() {
                                 state.captured_backgrounds[data.output_idx] = Some(ss.into_inner());
@@ -694,12 +705,14 @@ impl PointerHandler for WaylandLock {
         events: &[PointerEvent],
     ) {
         for event in events {
-            if let PointerEventKind::Press { button, .. } = event.kind {
+            match event.kind {
-                if button == 0x110 {
+                PointerEventKind::Press { button: 0x110, .. } => {
                     let (x, y) = event.position;
                     if let Ok(lm) = self.lock_manager.lock() {
                         for surface in &lm.surfaces {
                             if surface.matches_surface(&event.surface) {
+                                // Check media controls first
+                                let mut handled = false;
                                 for (action, rx, ry, rw, rh) in &surface.renderer.media_rects {
                                     if x >= *rx && x <= rx + rw && y >= *ry && y <= ry + rh {
                                         match *action {
@@ -709,15 +722,56 @@ impl PointerHandler for WaylandLock {
                                             "prev" => self.system_manager.media_prev(),
                                             _ => {}
                                         }
+                                        handled = true;
+                                        break;
+                                    }
+                                }
+                                if handled {
+                                    return;
+                                }
+                                // Check indicator ring hit — hold to peek (like Ctrl)
+                                let cx = surface.renderer.width as f64 / 2.0;
+                                let cy = surface.renderer.height as f64 / 2.0;
+                                let r = surface.renderer.config.indicator_radius as f64;
+                                let shape = surface.renderer.config.ring_shape;
+                                if crate::render::ring_shape::point_in_shape(cx, cy, r, shape, x, y)
+                                {
+                                    drop(lm);
+                                    if let Ok(mut lm) = self.lock_manager.lock() {
+                                        if let Some(s) = lm
+                                            .surfaces
+                                            .iter_mut()
+                                            .find(|s| s.matches_surface(&event.surface))
+                                        {
+                                            s.set_peek_held(true);
+                                            s.update();
+                                            let _ = s.commit(&mut self.pool);
+                                        }
+                                    }
                                     return;
                                 }
                             }
                         }
                     }
                 }
+                PointerEventKind::Release { button: 0x110, .. } => {
+                    if let Ok(mut lm) = self.lock_manager.lock() {
+                        // Clear peek on ALL surfaces. Wayland button release events
+                        // can reference a different wl_surface proxy than the press
+                        // event (compositor-dependent pointer grab semantics), so
+                        // matching by surface might miss the LockedSurface that has
+                        // peek_toggled=true. Iterating every surface guarantees peek
+                        // always ends on button release — matching Ctrl-hold behavior.
+                        for surface in &mut lm.surfaces {
+                            surface.set_peek_held(false);
+                            surface.update();
+                            let _ = surface.commit(&mut self.pool);
                         }
                     }
                 }
+                _ => {}
+            }
+        }
     }
 }
 
@@ -757,12 +811,16 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     let system_manager = Arc::new(SystemManager::new(&config));
 
-    let (auth_tx_actual, auth_feedback_rx_actual) =
+    let (auth_tx_actual, auth_feedback_rx_actual) = match auth::create_and_run_auth_loop(
-    match auth::create_and_run_auth_loop(config.pam_service.clone()) {
+        config.pam_service.clone(),
+    ) {
         Some(channels) => channels,
         None => {
             log::error!("Failed to initialize authentication. This usually means PAM is not configured correctly.");
-            log::error!("Please ensure you have a PAM service file at /etc/pam.d/{}", config.pam_service);
+            log::error!(
+                "Please ensure you have a PAM service file at /etc/pam.d/{}",
+                config.pam_service
+            );
             std::process::exit(1);
         }
     };
@@ -902,8 +960,13 @@ fn main() -> Result<(), Box<dyn Error>> {
         // treat as auth failure so the user gets feedback instead of hanging forever.
         if state.auth_pending_seq.is_some() {
             if let Some(at) = state.auth_pending_at {
-                if Instant::now().duration_since(at) >= Duration::from_millis(state.config.auth_timeout) {
+                if Instant::now().duration_since(at)
-                    log::warn!("Authentication timed out after {} ms", state.config.auth_timeout);
+                    >= Duration::from_millis(state.config.auth_timeout)
+                {
+                    log::warn!(
+                        "Authentication timed out after {} ms",
+                        state.config.auth_timeout
+                    );
                     // Clear pending seq so the eventual PAM result is ignored as stale
                     state.auth_pending_seq = None;
                     state.handle_auth_result(false);

src/render/feedback.rs

@@ -12,8 +12,7 @@ impl Renderer {
 
         if a > 0.0 {
             self.context.new_path();
-            self.context
+            self.context.set_source_rgba(r, g, b, a * self.fade_alpha);
-                .set_source_rgba(r, g, b, a * self.fade_alpha);
             self.context.set_line_width(thickness + 2.0);
             self.context.set_line_join(cairo::LineJoin::Round);
             ring_shape::build_ring_path(
@@ -180,19 +179,25 @@ impl Renderer {
     pub(crate) fn update_feedback_timers(&mut self) {
         self.update_uptime();
         if let Some(start) = self.wrong_password_start {
-            if start.elapsed() > std::time::Duration::from_millis(self.config.wrong_password_duration) {
+            if start.elapsed()
+                > std::time::Duration::from_millis(self.config.wrong_password_duration)
+            {
                 self.wrong_password_shown = false;
                 self.wrong_password_start = None;
             }
         }
         if let Some(start) = self.key_highlight_start {
-            if start.elapsed() > std::time::Duration::from_millis(self.config.key_highlight_duration) {
+            if start.elapsed()
+                > std::time::Duration::from_millis(self.config.key_highlight_duration)
+            {
                 self.key_highlight_shown = false;
                 self.key_highlight_start = None;
             }
         }
         if let Some(start) = self.cleared_feedback_start {
-            if start.elapsed() > std::time::Duration::from_millis(self.config.cleared_feedback_duration) {
+            if start.elapsed()
+                > std::time::Duration::from_millis(self.config.cleared_feedback_duration)
+            {
                 self.cleared_feedback_shown = false;
                 self.cleared_feedback_start = None;
             }

src/render/indicator.rs

@@ -75,17 +75,36 @@ impl Renderer {
         let thickness = self.config.indicator_thickness as f64;
         let shape = self.config.ring_shape;
 
-        self.context.new_path();
+        let max_dots = self.config.max_dots as f64;
-        self.context.set_source_rgba(1.0, 1.0, 1.0, self.fade_alpha);
+        let dot_radius = radius - thickness - 10.0;
+        let t_offset = ring_shape::top_centre_offset(shape);
 
         let count = self.password_display.len();
         if count == 0 {
             return;
         }
 
-        let max_dots = self.config.max_dots as f64;
+        if self.peeking {
-        let dot_radius = radius - thickness - 10.0;
+            // Draw each character at the same ring-perimeter positions as dots
-        let t_offset = ring_shape::top_centre_offset(shape);
+            self.context.set_font_size(14.0);
+            self.context.set_source_rgba(1.0, 1.0, 1.0, self.fade_alpha);
+            for (i, ch) in self.password_display.chars().enumerate() {
+                let t = (i as f64 / max_dots) + t_offset;
+                let (x, y) = ring_shape::perimeter_point(center_x, center_y, dot_radius, shape, t);
+
+                let mut ch_str = String::new();
+                ch_str.push(ch);
+                let te = render_try!(self.context.text_extents(&ch_str));
+                self.context.new_path();
+                self.context.move_to(
+                    x - te.x_bearing() - te.width() / 2.0,
+                    y - te.y_bearing() - te.height() / 2.0,
+                );
+                render_try!(self.context.show_text(&ch_str));
+            }
+        } else {
+            self.context.new_path();
+            self.context.set_source_rgba(1.0, 1.0, 1.0, self.fade_alpha);
 
             for i in 0..count {
                 let t = (i as f64 / max_dots) + t_offset;
@@ -95,10 +114,18 @@ impl Renderer {
                 self.context.arc(x, y, 4.0, 0.0, 2.0 * std::f64::consts::PI);
                 render_try!(self.context.fill());
             }
+        }
 
-        // Cursor indicator
+        // Cursor indicator (shared between peek and dot modes).
-        if self.fade_alpha > 0.0 && self.cursor_position > 0 {
+        if self.fade_alpha > 0.0 {
-            let cursor_t = ((self.cursor_position as f64 - 0.5) / max_dots) + t_offset;
+            // At position 0, place the cursor squarely at the first-dot position
+            // (t_offset) instead of subtracting 0.5, which would push t negative
+            // and cause perimeter_point to wrap it to the far end of the ring.
+            let cursor_t = if self.cursor_position == 0 {
+                t_offset
+            } else {
+                ((self.cursor_position as f64 - 0.5) / max_dots) + t_offset
+            };
             let (cx, cy) =
                 ring_shape::perimeter_point(center_x, center_y, dot_radius, shape, cursor_t);
             let dx = cx - center_x;

src/render/media_bar.rs

@@ -15,7 +15,9 @@ impl Renderer {
                     if let Ok(img) = image::load_from_memory(data) {
                         let img = img.to_rgba8();
                         let (w, h) = img.dimensions();
-                        if let Ok(mut surface) = ImageSurface::create(Format::ARgb32, w as i32, h as i32) {
+                        if let Ok(mut surface) =
+                            ImageSurface::create(Format::ARgb32, w as i32, h as i32)
+                        {
                             if let Ok(mut surface_data) = surface.data() {
                                 for y in 0..h {
                                     for x in 0..w {
@@ -72,7 +74,8 @@ impl Renderer {
                 }
             }
 
-            self.context.move_to(text_center_x - te.width() / 2.0, start_y + 20.0);
+            self.context
+                .move_to(text_center_x - te.width() / 2.0, start_y + 20.0);
             render_try!(self.context.show_text(&display_text));
 
             // All media buttons on one row, evenly spaced.
@@ -82,17 +85,18 @@ impl Renderer {
             let btn_y = start_y + 50.0;
 
             // Layout: prev | play_pause | next (centered as a group)
-            let total_buttons: f64 =
+            let total_buttons: f64 = (self.media_prev_icon_surface.is_some() as u32
-                (self.media_prev_icon_surface.is_some() as u32
                 + 1
-                    + self.media_next_icon_surface.is_some() as u32) as f64;
+                + self.media_next_icon_surface.is_some() as u32)
+                as f64;
             let group_width = (total_buttons - 1.0) * btn_gap + btn_size;
             let group_start_x = center_x - group_width / 2.0;
             let mut btn_x = group_start_x;
 
             if let Some(ref icon) = self.media_prev_icon_surface {
                 self.draw_icon_at(btn_x, btn_y - btn_size / 2.0, icon);
-                self.media_rects.push(("prev", btn_x, btn_y - btn_size / 2.0, btn_size, btn_size));
+                self.media_rects
+                    .push(("prev", btn_x, btn_y - btn_size / 2.0, btn_size, btn_size));
                 btn_x += btn_gap;
             }
 
@@ -100,17 +104,30 @@ impl Renderer {
             if self.system_status.media_playing {
                 if let Some(ref icon) = self.media_pause_icon_surface {
                     self.draw_icon_at(btn_x, btn_y - btn_size / 2.0, icon);
-                    self.media_rects.push(("play_pause", btn_x, btn_y - btn_size / 2.0, btn_size, btn_size));
+                    self.media_rects.push((
+                        "play_pause",
+                        btn_x,
+                        btn_y - btn_size / 2.0,
+                        btn_size,
+                        btn_size,
+                    ));
                 }
             } else if let Some(ref icon) = self.media_play_icon_surface {
                 self.draw_icon_at(btn_x, btn_y - btn_size / 2.0, icon);
-                self.media_rects.push(("play_pause", btn_x, btn_y - btn_size / 2.0, btn_size, btn_size));
+                self.media_rects.push((
+                    "play_pause",
+                    btn_x,
+                    btn_y - btn_size / 2.0,
+                    btn_size,
+                    btn_size,
+                ));
             }
             btn_x += btn_gap;
 
             if let Some(ref icon) = self.media_next_icon_surface {
                 self.draw_icon_at(btn_x, btn_y - btn_size / 2.0, icon);
-                self.media_rects.push(("next", btn_x, btn_y - btn_size / 2.0, btn_size, btn_size));
+                self.media_rects
+                    .push(("next", btn_x, btn_y - btn_size / 2.0, btn_size, btn_size));
             }
         }
     }

src/render/mod.rs

@@ -21,7 +21,7 @@ macro_rules! render_try {
 mod feedback;
 mod indicator;
 mod media_bar;
-mod ring_shape;
+pub(crate) mod ring_shape;
 mod status_bar;
 
 pub struct Renderer {
@@ -42,6 +42,7 @@ pub struct Renderer {
     pub(crate) key_highlight_angle: f64,
     pub(crate) background: Option<ImageSurface>,
     pub(crate) password_display: String,
+    pub(crate) peeking: bool,
     pub(crate) cursor_position: usize,
     pub(crate) uptime_cache: String,
     pub(crate) last_uptime_update: Option<Instant>,
@@ -85,6 +86,7 @@ impl Renderer {
             key_highlight_angle: 0.0,
             background: None,
             password_display: String::new(),
+            peeking: false,
             cursor_position: 0,
             uptime_cache: String::new(),
             last_uptime_update: None,
@@ -127,10 +129,12 @@ impl Renderer {
 
     pub fn set_password_display(&mut self, length: usize) {
         self.password_display = ".".repeat(length);
+        self.peeking = false;
     }
 
     pub fn peek_password(&mut self, password: &str) {
         self.password_display = password.to_string();
+        self.peeking = true;
     }
 
     pub fn set_cursor_position(&mut self, position: usize) {

src/render/ring_shape.rs

@@ -9,13 +9,7 @@ const SEGMENTS: usize = 120;
 /// Return the (x, y) point on the shape's perimeter at normalized position `t` ∈ [0, 1].
 /// `t = 0` is a reference point (rightmost for most shapes); `t` increases clockwise.
 /// `r` is the shape's characteristic radius (distance from center to side/vertex).
-pub(crate) fn perimeter_point(
+pub(crate) fn perimeter_point(cx: f64, cy: f64, r: f64, shape: RingShape, t: f64) -> (f64, f64) {
-    cx: f64,
-    cy: f64,
-    r: f64,
-    shape: RingShape,
-    t: f64,
-) -> (f64, f64) {
     // Normalize t to [0, 1). Rust's % preserves sign, and the shape-specific
     // functions use floor/truncation that break on negative values.
     let t = t - t.floor();
@@ -95,9 +89,8 @@ fn hexagon_perimeter_point(cx: f64, cy: f64, r: f64, t: f64) -> (f64, f64) {
     let local = t * 6.0 - side as f64;
 
     // Shared helper for edges between two vertices
-    let vert = |angle_rad: f64| -> (f64, f64) {
+    let vert =
-        (cx + r * angle_rad.cos(), cy + r * angle_rad.sin())
+        |angle_rad: f64| -> (f64, f64) { (cx + r * angle_rad.cos(), cy + r * angle_rad.sin()) };
-    };
 
     // Vertices clockwise from right (angle = 0)
     let v = [
@@ -214,6 +207,40 @@ pub(crate) fn build_fill_path(
     build_ring_path(ctx, cx, cy, inner_r, shape);
 }
 
+/// Check whether a point `(px, py)` lies inside the shape's fill area.
+/// This is used for hit‑testing (e.g. click & hold to peek) so the clickable
+/// region matches what the user sees on screen.
+pub(crate) fn point_in_shape(cx: f64, cy: f64, r: f64, shape: RingShape, px: f64, py: f64) -> bool {
+    let dx = (px - cx).abs();
+    let dy = (py - cy).abs();
+    match shape {
+        RingShape::Circle => dx * dx + dy * dy <= r * r,
+        RingShape::Square => dx <= r && dy <= r,
+        RingShape::Diamond => dx + dy <= r,
+        RingShape::Hexagon => {
+            // Regular hexagon, vertex at (r, 0), edge slopes at ±60°.
+            // For |dx| ≥ r/2 the sloping edge bounds: |dy| ≤ √3 (r − |dx|).
+            // For |dx| ≤ r/2 the flat top bounds:    |dy| ≤ √3 r / 2.
+            let sqrt3 = 3.0_f64.sqrt();
+            if dx >= r / 2.0 {
+                dy <= sqrt3 * (r - dx)
+            } else {
+                dy <= r * sqrt3 / 2.0
+            }
+        }
+        RingShape::Pill => {
+            // Pill = centre rectangle (2r × 2r) + semicircular caps of
+            // radius r at each end.  Total width 4r, height 2r.
+            if dx <= r {
+                dy <= r
+            } else {
+                let ex = dx - r;
+                ex * ex + dy * dy <= r * r
+            }
+        }
+    }
+}
+
 /// Return the normalized `t` offset that places the first password dot at the
 /// visual top-centre of the shape. May be negative; callers should NOT wrap.
 pub(crate) fn top_centre_offset(shape: RingShape) -> f64 {

src/screenshot.rs

@@ -36,264 +36,17 @@ impl Screenshot {
     /// Apply configured visual effects to the screenshot.
     pub fn apply_effects(&mut self, config: &Config) -> Result<()> {
         if let Some((radius, times)) = config.effect_blur {
-            self.apply_blur(radius, times)?;
+            crate::effects::apply_blur(&mut self.surface, radius, times)?;
         }
         if let Some((base, factor)) = config.effect_vignette {
-            self.apply_vignette(base, factor)?;
+            crate::effects::apply_vignette(&mut self.surface, base, factor)?;
         }
         if let Some(pixel_size) = config.effect_pixelate {
-            self.apply_pixelate(pixel_size)?;
+            crate::effects::apply_pixelate(&mut self.surface, pixel_size)?;
         }
         if let Some(angle) = config.effect_swirl {
-            self.apply_swirl(angle)?;
+            crate::effects::apply_swirl(&mut self.surface, angle)?;
         }
-        if let Some(factor) = config.effect_melting {
-            self.apply_melting(factor)?;
-        }
-        Ok(())
-    }
-
-    /// Apply a swirl effect.
-    pub fn apply_swirl(&mut self, angle: f32) -> Result<()> {
-        let width = self.surface.width();
-        let height = self.surface.height();
-        let center_x = width as f32 / 2.0;
-        let center_y = height as f32 / 2.0;
-        let radius = center_x.min(center_y);
-
-        let stride = self.surface.stride() as usize;
-        let mut data = vec![0u8; stride * height as usize];
-        self.surface
-            .with_data(|src| data.copy_from_slice(src))
-            .context("swirl: failed to read surface data")?;
-        let original = data.clone();
-
-        for y in 0..height {
-            for x in 0..width {
-                let dx = x as f32 - center_x;
-                let dy = y as f32 - center_y;
-                let d = (dx * dx + dy * dy).sqrt();
-
-                if d < radius {
-                    let percent = (radius - d) / radius;
-                    let theta = percent * percent * angle;
-                    let s = theta.sin();
-                    let c = theta.cos();
-
-                    let nx = (c * dx - s * dy + center_x) as i32;
-                    let ny = (s * dx + c * dy + center_y) as i32;
-
-                    if nx >= 0 && nx < width && ny >= 0 && ny < height {
-                        let src_idx = (ny as usize * stride) + (nx as usize * 4);
-                        let dst_idx = (y as usize * stride) + (x as usize * 4);
-                        data[dst_idx..dst_idx + 4].copy_from_slice(&original[src_idx..src_idx + 4]);
-                    }
-                }
-            }
-        }
-
-        let mut surface_data = self.surface.data().context("swirl: failed to write surface data")?;
-        surface_data.copy_from_slice(&data);
-        Ok(())
-    }
-
-    /// Apply a melting effect (vertical smear).
-    pub fn apply_melting(&mut self, factor: f32) -> Result<()> {
-        let width = self.surface.width();
-        let height = self.surface.height();
-
-        let stride = self.surface.stride() as usize;
-        let mut data = vec![0u8; stride * height as usize];
-        self.surface
-            .with_data(|src| data.copy_from_slice(src))
-            .context("melting: failed to read surface data")?;
-
-        use rand::RngExt;
-        let mut rng = rand::rng();
-
-        for x in 0..width {
-            let mut melt_amount = 0.0;
-            for y in 0..height {
-                melt_amount += rng.random_range(0.0..factor);
-                let src_y = (y as f32 - melt_amount).max(0.0) as i32;
-
-                let src_idx = (src_y as usize * stride) + (x as usize * 4);
-                let dst_idx = (y as usize * stride) + (x as usize * 4);
-
-                // Copy the pixel from above to create a smear
-                let pixel = [
-                    data[src_idx],
-                    data[src_idx + 1],
-                    data[src_idx + 2],
-                    data[src_idx + 3],
-                ];
-                data[dst_idx..dst_idx + 4].copy_from_slice(&pixel);
-            }
-        }
-
-        let mut surface_data = self.surface.data().context("melting: failed to write surface data")?;
-        surface_data.copy_from_slice(&data);
-        Ok(())
-    }
-
-    /// Pixelate the surface.
-    pub fn apply_pixelate(&mut self, pixel_size: u32) -> Result<()> {
-        if pixel_size <= 1 {
-            return Ok(());
-        }
-
-        let width = self.surface.width();
-        let height = self.surface.height();
-        let stride = self.surface.stride() as usize;
-        let mut data = vec![0u8; stride * height as usize];
-        self.surface
-            .with_data(|src| data.copy_from_slice(src))
-            .context("pixelate: failed to read surface data")?;
-
-        for y in (0..height).step_by(pixel_size as usize) {
-            for x in (0..width).step_by(pixel_size as usize) {
-                let mut r = 0u32;
-                let mut g = 0u32;
-                let mut b = 0u32;
-                let mut count = 0u32;
-
-                // Average pixels in the block
-                for py in 0..pixel_size {
-                    for px in 0..pixel_size {
-                        let cur_x = x + px as i32;
-                        let cur_y = y + py as i32;
-                        if cur_x < width && cur_y < height {
-                            let index = (cur_y as usize * stride) + (cur_x as usize * 4);
-                            r += data[index] as u32;
-                            g += data[index + 1] as u32;
-                            b += data[index + 2] as u32;
-                            count += 1;
-                        }
-                    }
-                }
-
-                if count > 0 {
-                    let r = r.checked_div(count).unwrap_or(0) as u8;
-                    let g = g.checked_div(count).unwrap_or(0) as u8;
-                    let b = b.checked_div(count).unwrap_or(0) as u8;
-
-                    // Fill the block
-                    for py in 0..pixel_size {
-                        for px in 0..pixel_size {
-                            let cur_x = x + px as i32;
-                            let cur_y = y + py as i32;
-                            if cur_x < width && cur_y < height {
-                                let index = (cur_y as usize * stride) + (cur_x as usize * 4);
-                                data[index] = r;
-                                data[index + 1] = g;
-                                data[index + 2] = b;
-                            }
-                        }
-                    }
-                }
-            }
-        }
-
-        let mut surface_data = self.surface.data().context("pixelate: failed to write surface data")?;
-        surface_data.copy_from_slice(&data);
-        Ok(())
-    }
-
-    /// Apply a Gaussian blur effect.
-    pub fn apply_blur(&mut self, radius: u32, times: u32) -> Result<()> {
-        if radius == 0 || times == 0 {
-            return Ok(());
-        }
-
-        let width = self.surface.width() as usize;
-        let height = self.surface.height() as usize;
-        let stride = self.surface.stride() as usize;
-        let mut data = vec![0u8; stride * height];
-
-        self.surface
-            .with_data(|src| data.copy_from_slice(src))
-            .context("blur: failed to read surface data")?;
-
-        // Convert from stride-padded surface data to tight RgbaImage.
-        // Cairo stride may be larger than width*4 for alignment, so copy
-        // row by row to strip the padding.
-        let tight_stride = width * 4;
-        let mut tight = vec![0u8; tight_stride * height];
-        for y in 0..height {
-            let src_off = y * stride;
-            let dst_off = y * tight_stride;
-            tight[dst_off..dst_off + tight_stride]
-                .copy_from_slice(&data[src_off..src_off + tight_stride]);
-        }
-
-        let mut img: image::ImageBuffer<image::Rgba<u8>, Vec<u8>> =
-            image::ImageBuffer::from_raw(width as u32, height as u32, tight)
-                .context("blur: failed to create image buffer")?;
-
-        for _ in 0..times {
-            let mut rgb_data: Vec<[u8; 3]> =
-                Vec::with_capacity(width * height);
-            for pixel in img.pixels() {
-                rgb_data.push([pixel[0], pixel[1], pixel[2]]);
-            }
-
-            fastblur::gaussian_blur(
-                &mut rgb_data,
-                width,
-                height,
-                radius as f32,
-            );
-
-            for (i, pixel) in img.pixels_mut().enumerate() {
-                pixel[0] = rgb_data[i][0];
-                pixel[1] = rgb_data[i][1];
-                pixel[2] = rgb_data[i][2];
-            }
-        }
-
-        // Copy back from tight buffer into stride-padded surface data
-        let new_data = img.into_raw();
-        let mut surface_data = self.surface.data()?;
-        for y in 0..height {
-            let src_off = y * tight_stride;
-            let dst_off = y * stride;
-            surface_data[dst_off..dst_off + tight_stride]
-                .copy_from_slice(&new_data[src_off..src_off + tight_stride]);
-        }
-        Ok(())
-    }
-
-    /// Apply a vignette effect (darken edges).
-    pub fn apply_vignette(&mut self, base: f32, factor: f32) -> Result<()> {
-        let width = self.surface.width();
-        let height = self.surface.height();
-        let center_x = width as f32 / 2.0;
-        let center_y = height as f32 / 2.0;
-        let max_distance = (center_x * center_x + center_y * center_y).sqrt();
-
-        let stride = self.surface.stride() as usize;
-        let mut data = vec![0u8; stride * height as usize];
-        self.surface
-            .with_data(|src| data.copy_from_slice(src))
-            .context("vignette: failed to read surface data")?;
-
-        for y in 0..height {
-            for x in 0..width {
-                let dx = x as f32 - center_x;
-                let dy = y as f32 - center_y;
-                let distance = (dx * dx + dy * dy).sqrt();
-                let vignette_factor = base + (1.0 - base) * (distance / max_distance).powf(factor);
-
-                let index = (y as usize * stride) + (x as usize * 4);
-                for i in 0..3 {
-                    let value = data[index + i] as f32 * vignette_factor;
-                    data[index + i] = value.clamp(0.0, 255.0) as u8;
-                }
-            }
-        }
-
-        let mut surface_data = self.surface.data().context("vignette: failed to write surface data")?;
-        surface_data.copy_from_slice(&data);
         Ok(())
     }
 }

src/system.rs

@@ -296,16 +296,25 @@ impl SystemManager {
                                     let action = cmd;
                                     // Fire-and-forget: don't block the polling loop on MPRIS.
                                     tokio::task::spawn_blocking(move || {
-                                        if let Ok(finder) = PlayerFinder::new() {
+                                        match PlayerFinder::new() {
-                                            if let Ok(player) = finder.find_active() {
+                                            Ok(finder) => {
-                                                match action {
+                                                match finder.find_active() {
-                                                    BackendCommand::MediaPlayPause => { let _ = player.play_pause(); }
+                                                    Ok(player) => {
-                                                    BackendCommand::MediaStop => { let _ = player.stop(); }
+                                                        let result = match action {
-                                                    BackendCommand::MediaNext => { let _ = player.next(); }
+                                                            BackendCommand::MediaPlayPause => player.play_pause(),
-                                                    BackendCommand::MediaPrev => { let _ = player.previous(); }
+                                                            BackendCommand::MediaStop => player.stop(),
-                                                    _ => {}
+                                                            BackendCommand::MediaNext => player.next(),
+                                                            BackendCommand::MediaPrev => player.previous(),
+                                                            _ => Ok(()),
+                                                        };
+                                                        if let Err(e) = result {
+                                                            error!("MPRIS command {action:?} failed: {e}");
                                                         }
                                                     }
+                                                    Err(e) => error!("No active MPRIS player found: {e}"),
+                                                }
+                                            }
+                                            Err(e) => error!("Failed to create MPRIS PlayerFinder: {e}"),
                                         }
                                     });
                                 }
@@ -320,10 +329,7 @@ impl SystemManager {
     }
 
     pub fn get_status(&self) -> SystemStatus {
-        self.status
+        self.status.lock().map(|s| s.clone()).unwrap_or_default()
-            .lock()
-            .map(|s| s.clone())
-            .unwrap_or_default()
     }
 
     pub fn send_command(&self, cmd: BackendCommand) {