├── .gitignore ├── COPYING ├── Cargo.toml ├── README.md ├── nixpkgs.nix ├── shell.nix └── src ├── backlight ├── mod.rs ├── randr.rs └── sys.rs ├── cache.rs ├── display.rs ├── error.rs ├── interface.rs ├── main.rs ├── observer.rs ├── screen.rs └── timer.rs /.gitignore: -------------------------------------------------------------------------------- 1 | target 2 | Cargo.lock 3 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /Cargo.toml: -------------------------------------------------------------------------------- 1 | [package] 2 | name = "dux" 3 | version = "0.2.0" 4 | edition = "2018" 5 | 6 | authors = ["meh. "] 7 | license = "GPL-3.0" 8 | 9 | description = "X11 backlight manager." 10 | repository = "https://github.com/meh/screenruster" 11 | keywords = ["x11", "graphics"] 12 | 13 | [dependencies] 14 | log = "0.4" 15 | env_logger = "0.6" 16 | 17 | clap = "2" 18 | xdg = "2" 19 | json = "0.11" 20 | dbus = "0.6" 21 | chrono = "0.4" 22 | channel = { package = "crossbeam-channel", version = "0.3" } 23 | 24 | xcb = { version = "0.8", features = ["randr", "damage", "thread"] } 25 | xcbu = { package = "xcb-util", version = "0.2", features = ["icccm", "ewmh", "image", "shm", "thread"] } 26 | byteorder = "1" 27 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | DUX 2 | === 3 | An X11 backlight manager. 4 | 5 | Installation 6 | ------------ 7 | 8 | Using [Nix](https://nixos.org/nix), you can access build-time dependencies via 9 | the Nix shell: 10 | 11 | ``` 12 | nix-shell 13 | ``` 14 | 15 | Otherwise, please refer to `buildInputs` in `shell.nix` to check whether you 16 | have all the required dependencies installed through other means. 17 | 18 | To install it you will need a nightly Rust toolchain, then you can install it 19 | with Cargo: 20 | 21 | ```shell 22 | cargo install dux 23 | ``` 24 | 25 | Usage 26 | ----- 27 | `dux` can be used like a replacement for `xbacklight`, the command syntax 28 | changes slightly but the functionality is the same (`get`, `set`, `inc`, `dec`, 29 | all with the usual fade settings). 30 | 31 | To start the adaptive brightness daemon just run: 32 | 33 | ``` 34 | dux adaptive & 35 | ``` 36 | 37 | To stop it gracefully (making sure the settings are saved) just run: 38 | 39 | ``` 40 | dux stop 41 | ``` 42 | 43 | Adaptive brightness 44 | =================== 45 | Adaptive brightness manages the backlight automatically for you based on the 46 | selected mode and profile. 47 | 48 | To select a mode you can either pass a `--mode ` when starting the 49 | adaptive brightness, or call `dux mode ` after it's been started. 50 | 51 | There's support for multiple profiles, to select a profile just pass `--profile 52 | ` when starting the adaptive brightness, or call `dux profile `; 53 | profiles are useful for example to have different settings during the night and 54 | during the day, or when you're inside or outside. 55 | 56 | To configure the brightness levels for the various modes all you have to do is 57 | change the backlight from `dux` itself like you would with `xbacklight` and the 58 | change will be saved. If you don't want to do that you can call `dux sync` after 59 | changing the backlight with something else. 60 | 61 | Desktop 62 | ------- 63 | The `desktop` mode uses the current active desktop (also known as workspace in 64 | some window managers) to reload the previously set brightness. 65 | 66 | Window 67 | ------ 68 | The `window` mode uses the active window to to reload the previously set 69 | brightness. 70 | 71 | Tt uses both the window's instance and class name to determine the brightness, 72 | this allows for a common brightness setting for the class and a specific one for 73 | the named window. 74 | 75 | Luminance 76 | --------- 77 | The `luminance` mode uses the screen content's contrast to reload the brightness 78 | value. 79 | 80 | When the luminance is between two different settings it will interpolate the 81 | brightness value between the two based on the distance between them. 82 | 83 | For example if you have `10` luminance set at `80` brightness and `50` luminance 84 | set at `20` brightness and the current luminance value is `20` the brightness 85 | will be closer to `80` than `20`. 86 | 87 | Performance wise it uses some X extensions to avoid doing heavy work, it uses 88 | the MIT-SHM extension to avoid connection pressure when fetching the screen 89 | contents and the DAMAGE extension to only fetch and recalculate the areas that 90 | have actually changed. 91 | -------------------------------------------------------------------------------- /nixpkgs.nix: -------------------------------------------------------------------------------- 1 | let 2 | # nixos-19.09 on 2020-03-03 3 | rev = "84f47bfe9ae892042fcb04f319ffe208cd0dbfd9"; 4 | nixpkgs = builtins.fetchTarball { 5 | url = "https://github.com/NixOS/nixpkgs/archive/${rev}.tar.gz"; 6 | sha256 = "0rh1kcasz78f2bbnd816705x027xkyrlm314x4jg8hjdhzyaky8f"; 7 | }; 8 | in 9 | import nixpkgs 10 | -------------------------------------------------------------------------------- /shell.nix: -------------------------------------------------------------------------------- 1 | let 2 | pkgs = import ./nixpkgs.nix {}; 3 | in 4 | pkgs.mkShell { 5 | buildInputs = with pkgs; [ 6 | cargo 7 | dbus 8 | gcc 9 | pkg-config 10 | python3 11 | rustc 12 | xorg.libxcb 13 | xorg.xcbutilimage 14 | xorg.xcbutilwm 15 | ]; 16 | } 17 | -------------------------------------------------------------------------------- /src/backlight/mod.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::sync::Arc; 19 | 20 | use crate::{Display, error}; 21 | 22 | pub trait Backlight { 23 | /// The raw backlight range. 24 | fn range(&self) -> (u32, u32) { 25 | (0, 100) 26 | } 27 | 28 | /// Get the current backlight value as a precentage. 29 | fn get(&mut self) -> error::Result; 30 | 31 | /// Set the backlight value as a percentage. 32 | fn set(&mut self, value: f32) -> error::Result<()>; 33 | } 34 | 35 | mod randr; 36 | mod sys; 37 | 38 | /// Open the first available backlight handler. 39 | pub fn open(display: Arc) -> error::Result> { 40 | if let Ok(backlight) = randr::Backlight::open(display.clone()) { 41 | Ok(Box::new(backlight)) 42 | } 43 | else if let Ok(backlight) = sys::Backlight::open() { 44 | Ok(Box::new(backlight)) 45 | } 46 | else { 47 | Err(error::Error::Unsupported) 48 | } 49 | } 50 | 51 | /// Clamps the given value between `0.0` and `100.0`. 52 | pub fn clamp(value: f32) -> f32 { 53 | if value > 100.0 { 54 | 100.0 55 | } 56 | else if value < 0.0 { 57 | 0.0 58 | } 59 | else { 60 | value 61 | } 62 | } 63 | 64 | /// Fades the backlight from the current value to the given value. 65 | pub mod fade { 66 | use std::thread; 67 | use std::time::Duration; 68 | use std::f32; 69 | use super::{Backlight, clamp}; 70 | use crate::error; 71 | 72 | /// It takes `time` milliseconds, split into `steps` increments/decrements. 73 | pub fn by_time(backlight: &mut dyn Backlight, value: f32, time: i32, steps: i32) -> error::Result<()> { 74 | let value = clamp(value); 75 | 76 | if steps != 0 && time != 0 { 77 | let mut current = backlight.get()?; 78 | let step = (value - current) as i32 / steps; 79 | let sleep = (time / steps) as u64; 80 | 81 | for _ in 0 .. steps { 82 | current += step as f32; 83 | backlight.set(current)?; 84 | thread::sleep(Duration::from_millis(sleep)); 85 | } 86 | } 87 | 88 | backlight.set(value) 89 | } 90 | 91 | /// Waits `time` milliseconds between each `value` increment/decrement. 92 | pub fn by_step(backlight: &mut dyn Backlight, value: f32, step: f32, time: u64) -> error::Result<()> { 93 | if time != 0 { 94 | let mut current = backlight.get()?; 95 | let step = if current > value { -step } else { step }; 96 | 97 | loop { 98 | current += step; 99 | 100 | if (step.is_sign_negative() && current < value) || (!step.is_sign_negative() && current > value) { 101 | break; 102 | } 103 | 104 | backlight.set(current)?; 105 | thread::sleep(Duration::from_millis(time)); 106 | } 107 | } 108 | 109 | backlight.set(value) 110 | } 111 | } 112 | -------------------------------------------------------------------------------- /src/backlight/randr.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::sync::Arc; 19 | 20 | use xcb; 21 | use byteorder::{NativeEndian, ReadBytesExt}; 22 | 23 | use crate::{Display, error}; 24 | 25 | pub struct Backlight { 26 | display: Arc, 27 | output: xcb::randr::Output, 28 | atom: xcb::Atom, 29 | range: (i32, i32), 30 | } 31 | 32 | impl Backlight { 33 | pub fn open(display: Arc) -> error::Result { 34 | fn find(display: &Display) -> error::Result<(xcb::randr::Output, xcb::Atom)> { 35 | let current = xcb::intern_atom(display, true, "Backlight").get_reply().ok() 36 | .and_then(|r| if r.atom() != xcb::ATOM_NONE { Some(r.atom()) } else { None }) 37 | .ok_or(error::Error::Unsupported)?; 38 | 39 | let legacy = xcb::intern_atom(display, true, "BACKLIGHT").get_reply().ok() 40 | .and_then(|r| if r.atom() != xcb::ATOM_NONE { Some(r.atom()) } else { None }) 41 | .ok_or(error::Error::Unsupported)?; 42 | 43 | for &id in xcb::randr::get_screen_resources_current(display, display.root()).get_reply()?.outputs() { 44 | let reply = if let Ok(r) = xcb::randr::get_output_property(display, id, current, xcb::ATOM_NONE, 0, 4, false, false).get_reply() { 45 | Some((r, current)) 46 | } 47 | else if let Ok(r) = xcb::randr::get_output_property(display, id, legacy, xcb::ATOM_NONE, 0, 4, false, false).get_reply() { 48 | Some((r, legacy)) 49 | } 50 | else { 51 | None 52 | }; 53 | 54 | if let Some((reply, atom)) = reply { 55 | if reply.type_() == xcb::ATOM_INTEGER && reply.num_items() == 1 && reply.format() == 32 { 56 | return Ok((id, atom)); 57 | } 58 | } 59 | } 60 | 61 | Err(error::Error::Unsupported) 62 | } 63 | 64 | let (output, atom) = find(&display)?; 65 | let range = xcb::randr::query_output_property(&display, output, atom).get_reply().map(|reply| 66 | (reply.valid_values()[0], reply.valid_values()[1]))?; 67 | 68 | Ok(Backlight { display, output, atom, range }) 69 | } 70 | } 71 | 72 | impl super::Backlight for Backlight { 73 | fn range(&self) -> (u32, u32) { 74 | (self.range.0 as u32, self.range.1 as u32) 75 | } 76 | 77 | fn get(&mut self) -> error::Result { 78 | let raw = xcb::randr::get_output_property(&self.display, self.output, self.atom, xcb::ATOM_NONE, 0, 4, false, false) 79 | .get_reply()?.data().read_i32::()?; 80 | 81 | Ok(((raw - self.range.0) * 100) as f32 / (self.range.1 - self.range.0) as f32) 82 | } 83 | 84 | fn set(&mut self, value: f32) -> error::Result<()> { 85 | xcb::randr::change_output_property(&self.display, self.output, self.atom, xcb::ATOM_INTEGER, 32, xcb::PROP_MODE_REPLACE as u8, 86 | &[(self.range.0 + (super::clamp(value) * (self.range.1 - self.range.0) as f32 / 100.0) as i32)]); 87 | 88 | self.display.flush(); 89 | 90 | Ok(()) 91 | } 92 | } 93 | -------------------------------------------------------------------------------- /src/backlight/sys.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::fs::{self, File}; 19 | use std::path::PathBuf; 20 | use std::io::{Write, Read}; 21 | 22 | use crate::error; 23 | 24 | pub struct Backlight { 25 | path: PathBuf, 26 | max: u32, 27 | } 28 | 29 | impl Backlight { 30 | pub fn open() -> error::Result { 31 | let root = fs::read_dir("/sys/class/backlight")?.next().ok_or(error::Error::Unsupported)??.path(); 32 | let max = { 33 | let mut file = File::open(root.join("max_brightness"))?; 34 | let mut content = String::new(); 35 | file.read_to_string(&mut content)?; 36 | 37 | content.trim().parse::().or(Err(error::Error::Unsupported))? 38 | }; 39 | 40 | Ok(Backlight { 41 | path: root.join("brightness"), 42 | max, 43 | }) 44 | } 45 | } 46 | 47 | impl super::Backlight for Backlight { 48 | fn range(&self) -> (u32, u32) { 49 | (0, self.max) 50 | } 51 | 52 | fn get(&mut self) -> error::Result { 53 | let mut file = File::open(&self.path)?; 54 | let mut content = String::new(); 55 | file.read_to_string(&mut content)?; 56 | 57 | Ok(content.trim().parse::().or(Err(error::Error::Unsupported))? 58 | * 100.0 / self.max as f32) 59 | } 60 | 61 | fn set(&mut self, value: f32) -> error::Result<()> { 62 | let mut file = File::create(&self.path)?; 63 | write!(&mut file, "{}", ((super::clamp(value) * self.max as f32) / 100.0).round() as u32)?; 64 | 65 | Ok(()) 66 | } 67 | } 68 | -------------------------------------------------------------------------------- /src/cache.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::fs::File; 19 | use std::io::Read; 20 | use std::path::{Path, PathBuf}; 21 | use std::sync::Arc; 22 | 23 | use xdg; 24 | use json::{self, JsonValue, object, array}; 25 | use chrono::{self, Timelike}; 26 | use xcb; 27 | use xcbu; 28 | 29 | use crate::{Display, error}; 30 | 31 | /// An in memory cache persisted to disk for settings. 32 | /// 33 | /// It supports multiple profiles and takes care of saving the brightness 34 | /// values appropriately for each `Mode`. 35 | pub struct Cache { 36 | display: Arc, 37 | data: JsonValue, 38 | path: PathBuf, 39 | profile: String, 40 | } 41 | 42 | /// Supported modes. 43 | pub enum Mode { 44 | Manual, 45 | Desktop(i32), 46 | Window(Option), 47 | Luminance(f32), 48 | Time(chrono::DateTime), 49 | } 50 | 51 | impl Cache { 52 | /// Open the cache at the given path. 53 | pub fn open>(display: Arc, path: Option) -> error::Result { 54 | // If no path was given we use the XDG standard places. 55 | let path = if let Some(path) = path { 56 | path.as_ref().into() 57 | } 58 | else { 59 | xdg::BaseDirectories::with_prefix("dux").unwrap() 60 | .place_config_file("cache.json").unwrap() 61 | }; 62 | 63 | // Load the contents if the file exists. 64 | let mut data = if path.exists() { 65 | let mut file = File::open(&path)?; 66 | let mut content = String::new(); 67 | file.read_to_string(&mut content)?; 68 | 69 | json::parse(&content).unwrap_or_else(|_| object!{}) 70 | } 71 | else { 72 | object!{} 73 | }; 74 | 75 | // Make sure it's set up with basic keys. 76 | if data["default"].is_null() { 77 | data["default"] = object!{}; 78 | } 79 | 80 | Ok(Cache { 81 | display, data, path, 82 | profile: "default".into(), 83 | }) 84 | } 85 | 86 | /// Save the cache to disk. 87 | pub fn save(&mut self) -> error::Result<()> { 88 | let mut file = File::create(&self.path)?; 89 | self.data.write_pretty(&mut file, 2)?; 90 | 91 | Ok(()) 92 | } 93 | 94 | /// Change cache profile. 95 | pub fn profile>(&mut self, name: T) { 96 | self.profile = name.into(); 97 | 98 | if self.data[&self.profile].is_null() { 99 | self.data[&self.profile] = object!{}; 100 | } 101 | } 102 | 103 | /// Set the brightness value for the given mode. 104 | pub fn set(&mut self, mode: Mode, value: f32) -> error::Result<()> { 105 | match mode { 106 | Mode::Manual => { 107 | self.data[&self.profile]["manual"] = value.into(); 108 | } 109 | 110 | // Just store the ID. 111 | Mode::Desktop(id) => { 112 | if self.data[&self.profile]["desktop"].is_null() { 113 | self.data[&self.profile]["desktop"] = object!{}; 114 | } 115 | 116 | self.data[&self.profile]["desktop"][id.to_string()] = value.into(); 117 | } 118 | 119 | // Store both the WM_CLASS instance and class name. 120 | Mode::Window(active) => { 121 | if let Some(id) = active { 122 | if self.data[&self.profile]["window"].is_null() { 123 | self.data[&self.profile]["window"] = object!{}; 124 | } 125 | 126 | let name = xcbu::icccm::get_wm_class(&self.display, id).get_reply()?; 127 | 128 | self.data[&self.profile]["window"][name.instance()] = value.into(); 129 | self.data[&self.profile]["window"][name.class()] = value.into(); 130 | } 131 | } 132 | 133 | // Store the luminance and brightness pairs in a sorted array. 134 | Mode::Luminance(luma) => { 135 | if self.data[&self.profile]["luminance"].is_null() { 136 | self.data[&self.profile]["luminance"] = array!{}; 137 | } 138 | 139 | if let JsonValue::Array(ref mut array) = self.data[&self.profile]["luminance"] { 140 | // The luminance value is rounded and limited to an `u8` so the 141 | // actual settable luminance ranges are between 0 and 100 and don't 142 | // suffer bloating caused by precision errors. 143 | let luma = (luma * 20.0).round() as u8; 144 | 145 | // Just use binary search and insert/replace as told. 146 | match array.binary_search_by_key(&luma, |v| v[0].as_u8().unwrap()) { 147 | Ok(index) => 148 | array[index] = array![luma, value], 149 | 150 | Err(index) => 151 | array.insert(index, array![luma, value]) 152 | } 153 | } 154 | } 155 | 156 | // Store the half hours since midnight in a sorted array. 157 | Mode::Time(time) => { 158 | if self.data[&self.profile]["time"].is_null() { 159 | self.data[&self.profile]["time"] = array!{}; 160 | } 161 | 162 | if let JsonValue::Array(ref mut array) = self.data[&self.profile]["time"] { 163 | let halves = time.num_seconds_from_midnight() / (30 * 60); 164 | 165 | match array.binary_search_by_key(&halves, |v| v[0].as_u32().unwrap()) { 166 | Ok(index) => 167 | array[index] = array![halves, value], 168 | 169 | Err(index) => 170 | array.insert(index, array![halves, value]), 171 | } 172 | } 173 | } 174 | } 175 | 176 | Ok(()) 177 | } 178 | 179 | /// Get the brightness value for the given mode. 180 | pub fn get(&mut self, mode: Mode) -> error::Result> { 181 | match mode { 182 | Mode::Manual => { 183 | if let Some(value) = self.data[&self.profile]["manual"].as_f32() { 184 | return Ok(Some(value)); 185 | } 186 | } 187 | 188 | // Desktop just checks the desktop ID. 189 | Mode::Desktop(id) => { 190 | if let Some(value) = self.data[&self.profile]["desktop"][id.to_string()].as_f32() { 191 | return Ok(Some(value)) 192 | } 193 | } 194 | 195 | // Window checking first checks if the WM_CLASS instance name matches, 196 | // otherwise it uses the WM_CLASS class name. 197 | // 198 | // This allows specialization for a differently named window belonging to 199 | // the same class. (i.e. terminals using the same program but having 200 | // different settings) 201 | Mode::Window(active) => { 202 | if let Some(id) = active { 203 | let name = xcbu::icccm::get_wm_class(&self.display, id).get_reply()?; 204 | 205 | if let Some(value) = self.data[&self.profile]["window"][name.instance()].as_f32() { 206 | return Ok(Some(value)); 207 | } 208 | 209 | if let Some(value) = self.data[&self.profile]["window"][name.class()].as_f32() { 210 | return Ok(Some(value)); 211 | } 212 | } 213 | } 214 | 215 | // Fetching the brightness corresponding to the luminance is a little 216 | // convulted, but alas. 217 | Mode::Luminance(luma) => { 218 | if let JsonValue::Array(ref slice) = self.data[&self.profile]["luminance"] { 219 | // If the array is empty we can't do nuffin. 220 | if slice.is_empty() { 221 | return Ok(None); 222 | } 223 | 224 | // The luminance value is rounded and limited to an `u8` so the 225 | // actual settable luminance ranges are between 0 and 100 and don't 226 | // suffer bloating caused by precision errors. 227 | let luma = (luma * 20.0).round() as u8; 228 | 229 | // Since the luminance values are sorted we can do a binary search to 230 | // fetch the surrounding values. 231 | let index = match slice.binary_search_by_key(&luma, |v| v[0].as_u8().unwrap()) { 232 | Ok(index) | Err(index) => index 233 | }; 234 | 235 | let before = slice.get(index.overflowing_sub(1).0).map(|v| (v[0].as_u8().unwrap(), v[1].as_f32().unwrap())); 236 | let after = slice.get(index).map(|v| (v[0].as_u8().unwrap(), v[1].as_f32().unwrap())); 237 | 238 | match (before, after) { 239 | // This is not possible, it would mean the array was empty. 240 | (None, None) => 241 | unreachable!(), 242 | 243 | // Just return the one value. 244 | (Some((_, value)), None) | (None, Some((_, value))) => { 245 | return Ok(Some(value)); 246 | } 247 | 248 | // Use linear interpolation to get the proper brightness. 249 | (Some((g1, d1)), Some((g2, d2))) => { 250 | let g = f32::from(luma); 251 | let g1 = f32::from(g1); 252 | let g2 = f32::from(g2); 253 | 254 | return Ok(Some(d1 + ((g - g1) / (g2 - g1)) * (d2 - d1))); 255 | } 256 | } 257 | } 258 | } 259 | 260 | // Fetching the time is also convulted. 261 | Mode::Time(time) => { 262 | if let JsonValue::Array(ref slice) = self.data[&self.profile]["time"] { 263 | if slice.is_empty() { 264 | return Ok(None); 265 | } 266 | 267 | let halves = time.num_seconds_from_midnight() / (30 * 60); 268 | 269 | // Since the halves are sorted we can do a binary search to fetch the 270 | // surrounding values. 271 | let index = match slice.binary_search_by_key(&halves, |v| v[0].as_u32().unwrap()) { 272 | Ok(index) | Err(index) => index 273 | }; 274 | 275 | let before = slice.get(index.overflowing_sub(1).0).map(|v| (v[0].as_u32().unwrap(), v[1].as_f32().unwrap())); 276 | let after = slice.get(index).map(|v| (v[0].as_u32().unwrap(), v[1].as_f32().unwrap())); 277 | 278 | match (before, after) { 279 | // This is not possible, it would mean the array was empty. 280 | (None, None) => 281 | unreachable!(), 282 | 283 | // Just return the one value. 284 | (Some((_, value)), None) | (None, Some((_, value))) => { 285 | return Ok(Some(value)); 286 | } 287 | 288 | // Use linear interpolation to get the proper brightness. 289 | (Some((g1, d1)), Some((g2, d2))) => { 290 | let g = halves as f32; 291 | let g1 = g1 as f32; 292 | let g2 = g2 as f32; 293 | 294 | return Ok(Some(d1 + ((g - g1) / (g2 - g1)) * (d2 - d1))); 295 | } 296 | } 297 | } 298 | } 299 | } 300 | 301 | Ok(None) 302 | } 303 | } 304 | 305 | impl Drop for Cache { 306 | fn drop(&mut self) { 307 | self.save().unwrap(); 308 | } 309 | } 310 | -------------------------------------------------------------------------------- /src/display.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::ops::Deref; 19 | 20 | use xcb; 21 | use xcbu; 22 | 23 | use crate::error; 24 | 25 | /// Handles the X11 display. 26 | pub struct Display { 27 | connection: xcbu::ewmh::Connection, 28 | screen: i32, 29 | root: xcb::Window, 30 | } 31 | 32 | impl Display { 33 | /// Open the default display. 34 | pub fn open() -> error::Result { 35 | let (connection, screen) = xcb::Connection::connect(None)?; 36 | let connection = xcbu::ewmh::Connection::connect(connection).map_err(|(e, _)| e)?; 37 | let root = connection.get_setup().roots().nth(screen as usize).unwrap().root(); 38 | 39 | // Randr is used for the backlight and screen configuration changes events. 40 | { 41 | let version = xcb::randr::query_version(&connection, 1, 2).get_reply()?; 42 | 43 | if version.major_version() != 1 || version.minor_version() < 2 { 44 | return Err(error::Error::Unsupported); 45 | } 46 | 47 | xcb::randr::select_input_checked(&connection, root, xcb::randr::NOTIFY_MASK_SCREEN_CHANGE as u16) 48 | .request_check()?; 49 | } 50 | 51 | // MIT-SHM is used to fetch screen contents. 52 | { 53 | let version = xcb::shm::query_version(&connection).get_reply()?; 54 | 55 | if version.major_version() != 1 || version.minor_version() < 1 { 56 | return Err(error::Error::Unsupported); 57 | } 58 | } 59 | 60 | // DAMAGE is used to get screen content changes. 61 | { 62 | let version = xcb::damage::query_version(&connection, 1, 1).get_reply()?; 63 | 64 | if version.major_version() != 1 || version.minor_version() < 1 { 65 | return Err(error::Error::Unsupported); 66 | } 67 | } 68 | 69 | Ok(Display { connection, screen, root }) 70 | } 71 | 72 | /// Get the default screen. 73 | pub fn screen(&self) -> i32 { 74 | self.screen 75 | } 76 | 77 | /// Get the root window for the default screen. 78 | pub fn root(&self) -> xcb::Window { 79 | self.root 80 | } 81 | 82 | /// Get the default screen width. 83 | pub fn width(&self) -> u32 { 84 | u32::from(self.get_setup().roots().nth(self.screen as usize).unwrap().width_in_pixels()) 85 | } 86 | 87 | /// Get the default screen height. 88 | pub fn height(&self) -> u32 { 89 | u32::from(self.get_setup().roots().nth(self.screen as usize).unwrap().height_in_pixels()) 90 | } 91 | 92 | /// Get the XRandr extension details. 93 | pub fn randr(&self) -> xcb::QueryExtensionData { 94 | self.connection.get_extension_data(xcb::randr::id()).unwrap() 95 | } 96 | 97 | /// Get the MIT-SHM extension details. 98 | pub fn shm(&self) -> xcb::QueryExtensionData { 99 | self.connection.get_extension_data(xcb::shm::id()).unwrap() 100 | } 101 | 102 | /// Get the DAMAGE extension details. 103 | pub fn damage(&self) -> xcb::QueryExtensionData { 104 | self.connection.get_extension_data(xcb::damage::id()).unwrap() 105 | } 106 | } 107 | 108 | impl Deref for Display { 109 | type Target = xcbu::ewmh::Connection; 110 | 111 | fn deref(&self) -> &Self::Target { 112 | &self.connection 113 | } 114 | } 115 | -------------------------------------------------------------------------------- /src/error.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::fmt; 19 | use std::error; 20 | use std::io; 21 | 22 | use xcb; 23 | use dbus; 24 | use clap; 25 | use json; 26 | 27 | pub type Result = ::std::result::Result; 28 | 29 | #[derive(Debug)] 30 | pub enum Error { 31 | Io(io::Error), 32 | Message(String), 33 | Unsupported, 34 | 35 | X(X), 36 | DBus(DBus), 37 | Cli(clap::Error), 38 | Json(json::JsonError), 39 | } 40 | 41 | #[derive(Debug)] 42 | pub enum X { 43 | MissingExtension, 44 | Request(u8, u8), 45 | Connection(xcb::ConnError), 46 | } 47 | 48 | #[derive(Debug)] 49 | pub enum DBus { 50 | AlreadyRegistered, 51 | Internal(dbus::Error), 52 | } 53 | 54 | impl From for Error { 55 | fn from(value: io::Error) -> Self { 56 | Error::Io(value) 57 | } 58 | } 59 | 60 | impl From for Error { 61 | fn from(value: String) -> Self { 62 | Error::Message(value) 63 | } 64 | } 65 | 66 | impl From<()> for Error { 67 | fn from(_: ()) -> Self { 68 | Error::Message("Something happened :(".into()) 69 | } 70 | } 71 | 72 | impl From for Error { 73 | fn from(value: X) -> Error { 74 | Error::X(value) 75 | } 76 | } 77 | 78 | impl From for Error { 79 | fn from(value: xcb::ConnError) -> Error { 80 | Error::X(X::Connection(value)) 81 | } 82 | } 83 | 84 | impl From> for Error { 85 | fn from(value: xcb::Error) -> Error { 86 | Error::X(X::Request(value.response_type(), value.error_code())) 87 | } 88 | } 89 | 90 | impl From for Error { 91 | fn from(value: dbus::Error) -> Self { 92 | Error::DBus(DBus::Internal(value)) 93 | } 94 | } 95 | 96 | impl From for Error { 97 | fn from(value: clap::Error) -> Self { 98 | Error::Cli(value) 99 | } 100 | } 101 | 102 | impl From for Error { 103 | fn from(value: json::JsonError) -> Self { 104 | Error::Json(value) 105 | } 106 | } 107 | 108 | impl From for Error { 109 | fn from(value: DBus) -> Self { 110 | Error::DBus(value) 111 | } 112 | } 113 | 114 | impl fmt::Display for Error { 115 | fn fmt(&self, f: &mut fmt::Formatter) -> ::std::result::Result<(), fmt::Error> { 116 | f.write_str(error::Error::description(self)) 117 | } 118 | } 119 | 120 | impl error::Error for Error { 121 | fn description(&self) -> &str { 122 | match *self { 123 | Error::Io(ref err) => 124 | err.description(), 125 | 126 | Error::Message(ref msg) => 127 | msg.as_ref(), 128 | 129 | Error::Unsupported => 130 | "Missing backlight support.", 131 | 132 | Error::X(ref err) => match *err { 133 | X::Request(..) => 134 | "An X request failed.", 135 | 136 | X::MissingExtension => 137 | "A required X extension is missing.", 138 | 139 | X::Connection(..) => 140 | "Connection to the X display failed.", 141 | }, 142 | 143 | Error::DBus(ref err) => match *err { 144 | DBus::AlreadyRegistered => 145 | "The name has already been registered.", 146 | 147 | DBus::Internal(ref err) => 148 | err.description(), 149 | }, 150 | 151 | Error::Cli(ref err) => 152 | err.description(), 153 | 154 | Error::Json(ref err) => 155 | err.description(), 156 | } 157 | } 158 | } 159 | -------------------------------------------------------------------------------- /src/interface.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::thread; 19 | use std::ops::Deref; 20 | 21 | use dbus; 22 | use channel::{self, Receiver}; 23 | 24 | use crate::{error, backlight}; 25 | 26 | /// DBus interface handler. 27 | pub struct Interface { 28 | receiver: Receiver, 29 | } 30 | 31 | #[derive(Debug)] 32 | pub enum Event { 33 | Mode(Mode), 34 | Profile(String), 35 | Brightness(f32), 36 | Save, 37 | Stop, 38 | 39 | ScreenSaver(bool), 40 | } 41 | 42 | #[derive(Eq, PartialEq, Copy, Clone, Debug)] 43 | pub enum Mode { 44 | Manual, 45 | Desktop, 46 | Window, 47 | Luminance, 48 | Time, 49 | } 50 | 51 | impl Default for Mode { 52 | fn default() -> Self { 53 | Mode::Luminance 54 | } 55 | } 56 | 57 | impl Mode { 58 | pub fn parse>(value: T) -> Option { 59 | match value.as_ref() { 60 | "manual" => Some(Mode::Manual), 61 | "desktop" => Some(Mode::Desktop), 62 | "window" => Some(Mode::Window), 63 | "luminance" => Some(Mode::Luminance), 64 | "time" => Some(Mode::Time), 65 | _ => None, 66 | } 67 | } 68 | } 69 | 70 | impl Interface { 71 | /// Change the adaptive mode. 72 | pub fn mode>(value: T) -> error::Result<()> { 73 | dbus::Connection::get_private(dbus::BusType::Session)? 74 | .send(dbus::Message::new_method_call( 75 | "meh.rust.Backlight", 76 | "/meh/rust/Backlight", 77 | "meh.rust.Backlight", 78 | "Mode")? 79 | .append1(value.into()))?; 80 | 81 | Ok(()) 82 | } 83 | 84 | /// Change the current profile. 85 | pub fn profile>(value: T) -> error::Result<()> { 86 | dbus::Connection::get_private(dbus::BusType::Session)? 87 | .send(dbus::Message::new_method_call( 88 | "meh.rust.Backlight", 89 | "/meh/rust/Backlight", 90 | "meh.rust.Backlight", 91 | "Profile")? 92 | .append1(value.into()))?; 93 | 94 | Ok(()) 95 | } 96 | 97 | /// Send a brightness change. 98 | pub fn brightness(value: f32) -> error::Result<()> { 99 | dbus::Connection::get_private(dbus::BusType::Session)? 100 | .send(dbus::Message::new_method_call( 101 | "meh.rust.Backlight", 102 | "/meh/rust/Backlight", 103 | "meh.rust.Backlight", 104 | "Brightness")? 105 | .append1(f64::from(backlight::clamp(value))))?; 106 | 107 | Ok(()) 108 | } 109 | 110 | /// Send a save event. 111 | pub fn save() -> error::Result<()> { 112 | dbus::Connection::get_private(dbus::BusType::Session)? 113 | .send(dbus::Message::new_method_call( 114 | "meh.rust.Backlight", 115 | "/meh/rust/Backlight", 116 | "meh.rust.Backlight", 117 | "Save")?)?; 118 | 119 | Ok(()) 120 | } 121 | 122 | /// Send a stop event. 123 | pub fn stop() -> error::Result<()> { 124 | dbus::Connection::get_private(dbus::BusType::Session)? 125 | .send(dbus::Message::new_method_call( 126 | "meh.rust.Backlight", 127 | "/meh/rust/Backlight", 128 | "meh.rust.Backlight", 129 | "Stop")?)?; 130 | 131 | Ok(()) 132 | } 133 | 134 | /// Spawn the server. 135 | pub fn spawn() -> error::Result { 136 | let (sender, receiver) = channel::bounded(1); 137 | let (g_sender, g_receiver) = channel::unbounded::>(); 138 | 139 | macro_rules! dbus { 140 | (connect system) => ( 141 | dbus::Connection::get_private(dbus::BusType::System) 142 | ); 143 | 144 | (connect session) => ( 145 | match dbus::Connection::get_private(dbus::BusType::Session) { 146 | Ok(value) => { 147 | value 148 | } 149 | 150 | Err(error) => { 151 | g_sender.send(Err(error.into())).unwrap(); 152 | return; 153 | } 154 | } 155 | ); 156 | 157 | (register $conn:expr, $name:expr) => ( 158 | match $conn.register_name($name, dbus::NameFlag::DoNotQueue as u32) { 159 | Ok(dbus::RequestNameReply::Exists) => { 160 | g_sender.send(Err(error::DBus::AlreadyRegistered.into())).unwrap(); 161 | return; 162 | } 163 | 164 | Err(error) => { 165 | g_sender.send(Err(error.into())).unwrap(); 166 | return; 167 | } 168 | 169 | Ok(value) => { 170 | value 171 | } 172 | } 173 | ); 174 | 175 | (watch $conn:expr, $filter:expr) => ( 176 | $conn.add_match($filter) 177 | ); 178 | 179 | (ready) => ( 180 | g_sender.send(Ok(())).unwrap(); 181 | ); 182 | 183 | (check) => ( 184 | g_receiver.recv().unwrap() 185 | ); 186 | 187 | (try $body:expr) => ( 188 | match $body { 189 | Ok(value) => { 190 | value 191 | } 192 | 193 | Err(err) => { 194 | error!("{:?}", err); 195 | return None; 196 | } 197 | } 198 | ); 199 | } 200 | 201 | macro_rules! cloning { 202 | ([$($var:ident),*] $closure:expr) => ({ 203 | $(let $var = $var.clone();)* 204 | $closure 205 | }); 206 | } 207 | 208 | thread::spawn(move || { 209 | let c = dbus!(connect session); 210 | let f = dbus::tree::Factory::new_sync::<()>(); 211 | 212 | dbus!(register c, "meh.rust.Backlight"); 213 | dbus!(watch c, "interface='org.gnome.ScreenSaver',member='ActiveChanged'"); 214 | dbus!(ready); 215 | 216 | let tree = f.tree(()) 217 | .add(f.object_path("/meh/rust/Backlight", ()).introspectable().add(f.interface("meh.rust.Backlight", ()) 218 | .add_m(f.method("Mode", (), cloning!([sender] move |m| { 219 | if let Some(value) = m.msg.get1::().and_then(Mode::parse) { 220 | sender.send(Event::Mode(value)).unwrap(); 221 | 222 | Ok(vec![m.msg.method_return()]) 223 | } 224 | else { 225 | Err(dbus::tree::MethodErr::no_arg()) 226 | } 227 | })).inarg::("mode")) 228 | 229 | .add_m(f.method("Profile", (), cloning!([sender] move |m| { 230 | if let Some(value) = m.msg.get1::() { 231 | sender.send(Event::Profile(value)).unwrap(); 232 | 233 | Ok(vec![m.msg.method_return()]) 234 | } 235 | else { 236 | Err(dbus::tree::MethodErr::no_arg()) 237 | } 238 | })).inarg::("profile")) 239 | 240 | .add_m(f.method("Brightness", (), cloning!([sender] move |m| { 241 | if let Some(value) = m.msg.get1::() { 242 | sender.send(Event::Brightness(value as f32)).unwrap(); 243 | 244 | Ok(vec![m.msg.method_return()]) 245 | } 246 | else { 247 | Err(dbus::tree::MethodErr::no_arg()) 248 | } 249 | })).inarg::("value")) 250 | 251 | .add_m(f.method("Save", (), cloning!([sender] move |m| { 252 | sender.send(Event::Save).unwrap(); 253 | 254 | Ok(vec![m.msg.method_return()]) 255 | }))) 256 | 257 | .add_m(f.method("Stop", (), cloning!([sender] move |m| { 258 | sender.send(Event::Stop).unwrap(); 259 | 260 | Ok(vec![m.msg.method_return()]) 261 | }))))); 262 | 263 | tree.set_registered(&c, true).unwrap(); 264 | for item in tree.run(&c, c.iter(1_000_000)) { 265 | if let dbus::ConnectionItem::Signal(m) = item { 266 | match (&*m.interface().unwrap(), &*m.member().unwrap()) { 267 | ("org.gnome.ScreenSaver", "ActiveChanged") => { 268 | if let Some(status) = m.get1() { 269 | sender.send(Event::ScreenSaver(status)).unwrap(); 270 | } 271 | } 272 | 273 | _ => () 274 | } 275 | } 276 | } 277 | }); 278 | 279 | dbus!(check)?; 280 | 281 | Ok(Interface { receiver }) 282 | } 283 | } 284 | 285 | impl Deref for Interface { 286 | type Target = Receiver; 287 | 288 | fn deref(&self) -> &Self::Target { 289 | &self.receiver 290 | } 291 | } 292 | -------------------------------------------------------------------------------- /src/main.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | mod error; 19 | pub use error::Error; 20 | 21 | mod display; 22 | pub use display::Display; 23 | 24 | mod screen; 25 | pub use screen::Screen; 26 | 27 | mod backlight; 28 | pub use backlight::Backlight; 29 | 30 | mod timer; 31 | pub use timer::Timer; 32 | 33 | mod interface; 34 | pub use interface::Interface; 35 | 36 | mod observer; 37 | pub use observer::Observer; 38 | 39 | mod cache; 40 | pub use cache::Cache; 41 | 42 | use std::sync::Arc; 43 | use env_logger; 44 | use clap::{ArgMatches, Arg, App, SubCommand}; 45 | use channel::select; 46 | 47 | fn main() { 48 | env_logger::init(); 49 | 50 | let display = Arc::new(Display::open().expect("no display found")); 51 | let mut backlight = backlight::open(display.clone()).expect("no backlight support"); 52 | 53 | let mut app = App::new("dux") 54 | .version(env!("CARGO_PKG_VERSION")) 55 | .author("meh. ") 56 | .subcommand(SubCommand::with_name("get") 57 | .about("Get the brightness percentage.")) 58 | .subcommand(SubCommand::with_name("set") 59 | .about("Set the brightness percentage.") 60 | .arg(Arg::with_name("PERCENTAGE") 61 | .required(true) 62 | .index(1) 63 | .help("The new brightness value.")) 64 | .arg(Arg::with_name("time") 65 | .short("t") 66 | .long("time") 67 | .takes_value(true) 68 | .help("Fade time in milliseconds (default is 200).")) 69 | .arg(Arg::with_name("steps") 70 | .short("s") 71 | .long("steps") 72 | .takes_value(true) 73 | .help("Number of steps in fade (default is 20)."))) 74 | .subcommand(SubCommand::with_name("inc") 75 | .about("Increase the brightness percentage.") 76 | .arg(Arg::with_name("PERCENTAGE") 77 | .required(true) 78 | .index(1) 79 | .help("The new brightness value.")) 80 | .arg(Arg::with_name("time") 81 | .short("t") 82 | .long("time") 83 | .takes_value(true) 84 | .help("Fade time in milliseconds (default is 0).")) 85 | .arg(Arg::with_name("steps") 86 | .short("s") 87 | .long("steps") 88 | .takes_value(true) 89 | .help("Number of steps in fade (default is 0)."))) 90 | .subcommand(SubCommand::with_name("dec") 91 | .about("Decrease the brightness percentage.") 92 | .arg(Arg::with_name("PERCENTAGE") 93 | .required(true) 94 | .index(1) 95 | .help("The new brightness value.")) 96 | .arg(Arg::with_name("time") 97 | .short("t") 98 | .long("time") 99 | .takes_value(true) 100 | .help("Fade time in milliseconds (default is 0).")) 101 | .arg(Arg::with_name("steps") 102 | .short("s") 103 | .long("steps") 104 | .takes_value(true) 105 | .help("Number of steps in fade (default is 0)."))) 106 | .subcommand(SubCommand::with_name("adaptive") 107 | .about("Start adaptive brightness.") 108 | .arg(Arg::with_name("refresh") 109 | .short("R") 110 | .long("refresh") 111 | .takes_value(true) 112 | .help("Distance in milliseconds within which damages are collapsed (default is 500).")) 113 | .arg(Arg::with_name("threshold") 114 | .short("T") 115 | .long("threshold") 116 | .takes_value(true) 117 | .help("Minimum total number of pixels for damages to be collapsed (default is `160000` around `400x400`).")) 118 | .arg(Arg::with_name("time") 119 | .short("t") 120 | .long("time") 121 | .takes_value(true) 122 | .help("Time to sleep between each step (default is 5).")) 123 | .arg(Arg::with_name("step") 124 | .short("s") 125 | .long("step") 126 | .takes_value(true) 127 | .help("Step to increase the brightness by (default is 1.0).")) 128 | .arg(Arg::with_name("cache") 129 | .short("c") 130 | .long("cache") 131 | .takes_value(true) 132 | .help("The path to the cache file.")) 133 | .arg(Arg::with_name("profile") 134 | .short("p") 135 | .long("profile") 136 | .takes_value(true) 137 | .help("The profile name (default is `default`).")) 138 | .arg(Arg::with_name("mode") 139 | .short("m") 140 | .long("mode") 141 | .takes_value(true) 142 | .help("One of either `desktop`, `window`, `luminance`, `time` or `manual."))) 143 | .subcommand(SubCommand::with_name("mode") 144 | .about("Change the adaption mode.") 145 | .arg(Arg::with_name("MODE") 146 | .required(true) 147 | .index(1) 148 | .help("One of either `desktop`, `window`, `luminance` or `time`."))) 149 | .subcommand(SubCommand::with_name("profile") 150 | .about("Change the adaption profile.") 151 | .arg(Arg::with_name("PROFILE") 152 | .required(true) 153 | .index(1) 154 | .help("The profile name."))) 155 | .subcommand(SubCommand::with_name("sync") 156 | .about("Synchronize any backlight changes with the adaptive daemon.")) 157 | .subcommand(SubCommand::with_name("save") 158 | .about("Force flush the cache to disk.")) 159 | .subcommand(SubCommand::with_name("stop") 160 | .about("Stop adaptive brightness mode.")); 161 | 162 | let matches = app.clone().get_matches(); 163 | match matches.subcommand() { 164 | ("get", Some(submatches)) => 165 | get(submatches, backlight), 166 | 167 | ("set", Some(submatches)) => 168 | set(submatches, backlight), 169 | 170 | ("inc", Some(submatches)) => 171 | inc(submatches, backlight), 172 | 173 | ("dec", Some(submatches)) => 174 | dec(submatches, backlight), 175 | 176 | ("adaptive", Some(submatches)) => 177 | adaptive(submatches, display, backlight), 178 | 179 | ("mode", Some(submatches)) => 180 | Interface::mode(submatches.value_of("MODE").unwrap()).unwrap(), 181 | 182 | ("profile", Some(submatches)) => 183 | Interface::profile(submatches.value_of("PROFILE").unwrap()).unwrap(), 184 | 185 | ("sync", Some(_)) => 186 | Interface::brightness(backlight.get().unwrap()).unwrap(), 187 | 188 | ("save", Some(_)) => 189 | Interface::save().unwrap(), 190 | 191 | ("stop", Some(_)) => 192 | Interface::stop().unwrap(), 193 | 194 | _ => 195 | app.print_help().unwrap() 196 | } 197 | } 198 | 199 | pub fn get(_matches: &ArgMatches, mut backlight: Box) { 200 | println!("{:.2}", backlight.get().unwrap()); 201 | } 202 | 203 | pub fn set(matches: &ArgMatches, mut backlight: Box) { 204 | let value = matches.value_of("PERCENTAGE").unwrap().parse().unwrap(); 205 | let _ = Interface::brightness(value); 206 | 207 | backlight::fade::by_time(backlight.as_mut(), value, 208 | matches.value_of("time").unwrap_or("200").parse().unwrap(), 209 | matches.value_of("steps").unwrap_or("20").parse().unwrap()).unwrap(); 210 | } 211 | 212 | pub fn inc(matches: &ArgMatches, mut backlight: Box) { 213 | let value = backlight.get().unwrap() + matches.value_of("PERCENTAGE").unwrap().parse::().unwrap(); 214 | let _ = Interface::brightness(value); 215 | 216 | backlight::fade::by_time(backlight.as_mut(), value, 217 | matches.value_of("time").unwrap_or("0").parse().unwrap(), 218 | matches.value_of("steps").unwrap_or("0").parse().unwrap()).unwrap(); 219 | } 220 | 221 | pub fn dec(matches: &ArgMatches, mut backlight: Box) { 222 | let value = backlight.get().unwrap() - matches.value_of("PERCENTAGE").unwrap().parse::().unwrap(); 223 | let _ = Interface::brightness(value); 224 | 225 | backlight::fade::by_time(backlight.as_mut(), value, 226 | matches.value_of("time").unwrap_or("0").parse().unwrap(), 227 | matches.value_of("steps").unwrap_or("0").parse().unwrap()).unwrap(); 228 | } 229 | 230 | pub fn adaptive(matches: &ArgMatches, display: Arc, mut backlight: Box) { 231 | use std::time::{Duration, Instant}; 232 | 233 | let time = matches.value_of("time").unwrap_or("5").parse().unwrap(); 234 | let step = matches.value_of("step").unwrap_or("1.0").parse().unwrap(); 235 | let refresh = matches.value_of("refresh").unwrap_or("500").parse().unwrap(); 236 | let threshold = if refresh > 0 { 237 | matches.value_of("threshold").unwrap_or("160000").parse().unwrap() 238 | } 239 | else { 240 | u64::max_value() 241 | }; 242 | 243 | let interface = Interface::spawn().unwrap(); 244 | let observer = Observer::spawn(display.clone()).unwrap(); 245 | let timer = Timer::spawn(timer::Settings { save: 30, heartbeat: 300 }).unwrap(); 246 | let mut cache = Cache::open(display.clone(), matches.value_of("cache")).unwrap(); 247 | let mut screen = Screen::open(display.clone(), display.width(), display.height()).unwrap(); 248 | 249 | if let Some(profile) = matches.value_of("profile") { 250 | cache.profile(profile); 251 | } 252 | 253 | let mut mode = interface::Mode::parse(matches.value_of("mode").unwrap_or("luminance")).unwrap(); 254 | let mut active = None; 255 | let mut desktop = 0; 256 | let mut changed = Instant::now() - Duration::from_secs(42); 257 | let mut brightness = 0.0; 258 | let mut rated = false; 259 | let mut screensaver = false; 260 | 261 | macro_rules! mode { 262 | ($value:expr) =>( 263 | match $value { 264 | interface::Mode::Manual => 265 | cache::Mode::Manual, 266 | 267 | interface::Mode::Desktop => 268 | cache::Mode::Desktop(desktop), 269 | 270 | interface::Mode::Window => 271 | cache::Mode::Window(active), 272 | 273 | interface::Mode::Luminance => 274 | cache::Mode::Luminance(screen.luminance()), 275 | 276 | interface::Mode::Time => 277 | cache::Mode::Time(chrono::Local::now()), 278 | } 279 | ); 280 | } 281 | 282 | macro_rules! fade { 283 | ($value:expr) => ( 284 | match $value { 285 | Some(v) if v != brightness => { 286 | brightness = v; 287 | backlight::fade::by_step(backlight.as_mut(), v, step, time) 288 | } 289 | 290 | _ => { 291 | Ok(()) 292 | } 293 | } 294 | ) 295 | } 296 | 297 | loop { 298 | select! { 299 | recv(timer) -> event => { 300 | match event.unwrap() { 301 | timer::Event::Refresh => { 302 | rated = false; 303 | 304 | if mode == interface::Mode::Luminance { 305 | screen.flush().unwrap(); 306 | 307 | if changed.elapsed().as_secs() >= 1 { 308 | fade!(cache.get(cache::Mode::Luminance(screen.luminance())).unwrap()).unwrap() 309 | } 310 | } 311 | } 312 | 313 | timer::Event::Heartbeat => { 314 | if mode == interface::Mode::Time { 315 | fade!(cache.get(cache::Mode::Time(chrono::Local::now())).unwrap()).unwrap(); 316 | } 317 | } 318 | 319 | timer::Event::Save => { 320 | cache.save().unwrap(); 321 | } 322 | } 323 | }, 324 | 325 | recv(interface) -> event => { 326 | match event.unwrap() { 327 | interface::Event::Mode(value) => { 328 | mode = value; 329 | fade!(cache.get(mode!(value)).unwrap()).unwrap(); 330 | } 331 | 332 | interface::Event::Profile(name) => { 333 | cache.profile(name); 334 | } 335 | 336 | interface::Event::Save => { 337 | cache.save().unwrap(); 338 | } 339 | 340 | interface::Event::Brightness(value) => { 341 | changed = Instant::now(); 342 | cache.set(mode!(mode), value).unwrap(); 343 | } 344 | 345 | interface::Event::Stop => { 346 | break; 347 | } 348 | 349 | interface::Event::ScreenSaver(active) => { 350 | screensaver = active; 351 | } 352 | } 353 | }, 354 | 355 | recv(observer) -> event => { 356 | match event.unwrap() { 357 | observer::Event::Show(_) | observer::Event::Hide(_) | observer::Event::Change(_) => (), 358 | 359 | observer::Event::Desktop(id) => { 360 | desktop = id; 361 | 362 | if mode == interface::Mode::Desktop { 363 | fade!(cache.get(cache::Mode::Desktop(desktop)).unwrap()).unwrap(); 364 | } 365 | } 366 | 367 | observer::Event::Active(value) => { 368 | active = value; 369 | 370 | if mode == interface::Mode::Window { 371 | fade!(cache.get(cache::Mode::Window(active)).unwrap()).unwrap(); 372 | } 373 | } 374 | 375 | observer::Event::Damage(rect) => { 376 | if mode == interface::Mode::Luminance && !screensaver { 377 | let refreshed = screen.damage(rect, threshold).unwrap(); 378 | 379 | if !refreshed { 380 | if !rated { 381 | timer.refresh(refresh).unwrap(); 382 | rated = true; 383 | } 384 | } 385 | else if changed.elapsed().as_secs() >= 1 { 386 | fade!(cache.get(cache::Mode::Luminance(screen.luminance())).unwrap()).unwrap() 387 | } 388 | } 389 | } 390 | 391 | observer::Event::Resize(width, height) => { 392 | screen.resize(width, height).unwrap(); 393 | } 394 | } 395 | } 396 | } 397 | } 398 | } 399 | -------------------------------------------------------------------------------- /src/observer.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::thread; 19 | use std::sync::Arc; 20 | use std::ops::Deref; 21 | 22 | use xcb; 23 | use channel::{self, Receiver}; 24 | 25 | use crate::{Display, error}; 26 | 27 | /// Handles events from a `Display` and sends the appropriate ones. 28 | pub struct Observer { 29 | receiver: Receiver, 30 | } 31 | 32 | /// Events from the `Display`. 33 | pub enum Event { 34 | /// A window is being shown. 35 | Show(xcb::Window), 36 | 37 | /// A window is being hidden. 38 | Hide(xcb::Window), 39 | 40 | /// A window's position/size has changed. 41 | Change(xcb::Window), 42 | 43 | /// Some screen area changed. 44 | Damage(xcb::Rectangle), 45 | 46 | /// The active window changed. 47 | Active(Option), 48 | 49 | /// The current desktop changed. 50 | Desktop(i32), 51 | 52 | /// The screen has been resized/rotated. 53 | Resize(u32, u32), 54 | } 55 | 56 | impl Observer { 57 | /// Get the current desktop. 58 | pub fn desktop(display: &Display) -> error::Result { 59 | xcb::get_property(display, false, display.root(), display.CURRENT_DESKTOP(), xcb::ATOM_CARDINAL, 0, 1) 60 | .get_reply()?.value::().get(0).cloned().ok_or(error::Error::Unsupported) 61 | } 62 | 63 | /// Get the currently active window, if any. 64 | pub fn window(display: &Display) -> error::Result> { 65 | let id = xcb::get_property(display, false, display.root(), display.ACTIVE_WINDOW(), xcb::ATOM_WINDOW, 0, 1) 66 | .get_reply()?.value::().get(0).cloned().ok_or(error::Error::Unsupported)?; 67 | 68 | if id == 0 { 69 | Ok(None) 70 | } 71 | else { 72 | Ok(Some(id)) 73 | } 74 | } 75 | 76 | /// Spawn the observer on the given `Display`. 77 | pub fn spawn(display: Arc) -> error::Result { 78 | let (sender, receiver) = channel::bounded(1); 79 | 80 | // Listen for map/unmap and configure events. 81 | xcb::change_window_attributes_checked(&display, display.root(), &[ 82 | (xcb::CW_EVENT_MASK, 83 | xcb::EVENT_MASK_SUBSTRUCTURE_NOTIFY | 84 | xcb::EVENT_MASK_PROPERTY_CHANGE)]).request_check()?; 85 | 86 | // Listen for damage areas, if the other report levels worked it would be 87 | // nice, but alas, we're gonna get spammed by damages. 88 | let damage = display.generate_id(); 89 | xcb::damage::create_checked(&display, damage, display.root(), xcb::damage::REPORT_LEVEL_RAW_RECTANGLES as u8) 90 | .request_check()?; 91 | 92 | thread::spawn(move || { 93 | // Send the currently active desktop if present. 94 | if let Ok(id) = Observer::desktop(&display) { 95 | sender.send(Event::Desktop(id)).unwrap(); 96 | } 97 | 98 | // Send the currently active window if present. 99 | if let Ok(id) = Observer::window(&display) { 100 | sender.send(Event::Active(id)).unwrap(); 101 | } 102 | 103 | while let Some(event) = display.wait_for_event() { 104 | match event.response_type() { 105 | xcb::MAP_NOTIFY => { 106 | let event = unsafe { xcb::cast_event::(&event) }; 107 | 108 | sender.send(Event::Show(event.window())).unwrap(); 109 | } 110 | 111 | xcb::UNMAP_NOTIFY => { 112 | let event = unsafe { xcb::cast_event::(&event) }; 113 | 114 | sender.send(Event::Hide(event.window())).unwrap(); 115 | } 116 | 117 | xcb::CONFIGURE_NOTIFY => { 118 | let event = unsafe { xcb::cast_event::(&event) }; 119 | 120 | sender.send(Event::Change(event.window())).unwrap(); 121 | } 122 | 123 | xcb::PROPERTY_NOTIFY => { 124 | let event = unsafe { xcb::cast_event::(&event) }; 125 | 126 | match event.atom() { 127 | prop if prop == display.CURRENT_DESKTOP() && event.state() == xcb::PROPERTY_NEW_VALUE as u8 => { 128 | if let Ok(id) = Observer::desktop(&display) { 129 | sender.send(Event::Desktop(id)).unwrap(); 130 | } 131 | } 132 | 133 | prop if prop == display.ACTIVE_WINDOW() && event.state() == xcb::PROPERTY_NEW_VALUE as u8 => { 134 | if let Ok(id) = Observer::window(&display) { 135 | sender.send(Event::Active(id)).unwrap(); 136 | } 137 | } 138 | 139 | _ => () 140 | } 141 | } 142 | 143 | // Handle damaged rectangles. 144 | e if e == display.damage().first_event() => { 145 | let event = unsafe { xcb::cast_event::(&event) }; 146 | sender.send(Event::Damage(event.area())).unwrap(); 147 | 148 | // Mark the damage region as handled. 149 | xcb::damage::subtract(&display, damage, xcb::xfixes::REGION_NONE, xcb::xfixes::REGION_NONE); 150 | display.flush(); 151 | } 152 | 153 | // Handle screen changes. 154 | e if e == display.randr().first_event() + xcb::randr::SCREEN_CHANGE_NOTIFY => { 155 | let event = unsafe { xcb::cast_event::(&event) }; 156 | 157 | if event.root() == display.root() { 158 | sender.send(Event::Resize(u32::from(event.width()), u32::from(event.height()))).unwrap(); 159 | } 160 | } 161 | 162 | _ => () 163 | } 164 | } 165 | }); 166 | 167 | Ok(Observer { receiver } ) 168 | } 169 | } 170 | 171 | impl Deref for Observer { 172 | type Target = Receiver; 173 | 174 | fn deref(&self) -> &Self::Target { 175 | &self.receiver 176 | } 177 | } 178 | -------------------------------------------------------------------------------- /src/screen.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::sync::Arc; 19 | use std::time::Instant; 20 | use std::cmp; 21 | 22 | use xcb; 23 | use xcbu; 24 | 25 | use crate::{Display, error}; 26 | 27 | /// Manages luminances and screen content through the MIT-SHM extension. 28 | pub struct Screen { 29 | display: Arc, 30 | image: xcbu::image::shm::Image, 31 | 32 | width: u32, 33 | height: u32, 34 | 35 | luminances: Vec, 36 | luminance: u64, 37 | 38 | cache: Vec<(u32, u32, u32, u32)>, 39 | rated: Option, 40 | } 41 | 42 | const PRECISION: f32 = 1_000_000.0; 43 | 44 | impl Screen { 45 | /// Create a new screen holder. 46 | pub fn open(display: Arc, width: u32, height: u32) -> error::Result { 47 | // Create an image in shared memory as big as the display. 48 | let image = xcbu::image::shm::create(&display, 24, width as u16, height as u16)?; 49 | 50 | // Set up the luminances vector, again as big as the display. 51 | let luminances = vec![0.0; (width * height) as usize]; 52 | 53 | Ok(Screen { 54 | display, image, 55 | width, height, 56 | 57 | luminances, luminance: 0, 58 | 59 | cache: Vec::new(), 60 | rated: None, 61 | }) 62 | } 63 | 64 | /// Resize the screen. 65 | pub fn resize(&mut self, width: u32, height: u32) -> error::Result<()> { 66 | // Create a new image only if the new size is bigger than the actual size. 67 | if self.image.actual_width() * self.image.actual_height() < (width * height) as u16 { 68 | self.image = xcbu::image::shm::create(&self.display, 24, width as u16, height as u16)?; 69 | } 70 | else { 71 | self.image.resize(width as u16, height as u16); 72 | } 73 | 74 | self.width = width; 75 | self.height = height; 76 | 77 | // Reset the luminance values. 78 | self.luminances.resize((width * height) as usize, 0.0); 79 | self.luminance = 0; 80 | 81 | // This gets optimized to a memset. 82 | for item in &mut self.luminances { 83 | *item = 0.0; 84 | } 85 | 86 | // Update the whole screen. 87 | self.refresh(0, 0, width, height) 88 | } 89 | 90 | /// Flush any cached damages. 91 | pub fn flush(&mut self) -> error::Result<()> { 92 | if self.rated.is_none() || self.cache.is_empty() { 93 | return Ok(()); 94 | } 95 | 96 | let (x, y, w, h) = self.cache.drain(..).fold((u32::max_value(), u32::max_value(), 0, 0), 97 | |(xmin, ymin, xmax, ymax), (x, y, w, h)| { 98 | (cmp::min(xmin, x), cmp::min(ymin, y), cmp::max(xmax, x + w), cmp::max(ymax, y + h)) 99 | }); 100 | 101 | self.rated = None; 102 | self.refresh(x, y, w - x, h - y) 103 | } 104 | 105 | /// Mark a screen area as damaged. 106 | pub fn damage(&mut self, rect: xcb::Rectangle, threshold: u64) -> error::Result { 107 | let x = rect.x() as u32; 108 | let y = rect.y() as u32; 109 | let w = u32::from(rect.width()); 110 | let h = u32::from(rect.height()); 111 | 112 | if self.rated.is_some() && u64::from(w * h) >= threshold { 113 | self.cache.push((x, y, w, h)); 114 | 115 | Ok(false) 116 | } 117 | else if u64::from(w * h) >= threshold { 118 | self.rated = Some(Instant::now()); 119 | self.refresh(x, y, w, h)?; 120 | 121 | Ok(false) 122 | } 123 | else { 124 | self.refresh(x, y, w, h)?; 125 | 126 | Ok(true) 127 | } 128 | } 129 | 130 | /// Get the given screen section and update the luminance values. 131 | pub fn refresh(&mut self, x: u32, y: u32, width: u32, height: u32) -> error::Result<()> { 132 | // Note that this will resize the image to fit the section, but that 133 | // doesn't matter because it will never be bigger than the screen. 134 | xcbu::image::shm::area(&self.display, self.display.root(), &mut self.image, 135 | x as i16, y as i16, width as u16, height as u16, !0)?; 136 | 137 | // Update the pixel values relative to the section. 138 | for xx in x .. width { 139 | for yy in y .. height { 140 | let rgb = { 141 | let data = self.image.data(); 142 | let offset = (((xx - x) * 4) + ((yy - y) * width * 4)) as usize; 143 | 144 | (data[offset], data[offset + 1], data[offset + 2]) 145 | }; 146 | 147 | self.put(xx, yy, rgb); 148 | } 149 | } 150 | 151 | Ok(()) 152 | } 153 | 154 | /// Puts a pixel at the given coordinates, updating the total luminance. 155 | pub fn put(&mut self, x: u32, y: u32, (r, g, b): (u8, u8, u8)) -> f32 { 156 | // Extract the RGB channels and normalize them to `0.0` - `1.0`. 157 | let r = f32::from(r) / 255.0; 158 | let g = f32::from(g) / 255.0; 159 | let b = f32::from(b) / 255.0; 160 | 161 | // Calculate the perceived luminance. 162 | let l = (r * 0.299) + (g * 0.587) + (b * 0.114); 163 | 164 | // The index within the luminance vector based on the position. 165 | let i = (x + (y * self.width)) as usize; 166 | 167 | // Update the total luminance in place, we use an `u64` to contain the 168 | // total to avoid incremental precision errors because of the repeated 169 | // operations. 170 | // 171 | // The actual value is clamped to a constant precision and converted to an 172 | // `u64` value. 173 | self.luminance -= (self.luminances[i].powi(2) * PRECISION) as u64; 174 | self.luminance += (l.powi(2) * PRECISION) as u64; 175 | 176 | // Save the new luminance so it can be restored when this pixel is changed. 177 | self.luminances[i] = l; 178 | 179 | l 180 | } 181 | 182 | /// Get the RMS luminance. 183 | pub fn luminance(&self) -> f32 { 184 | ((self.luminance as f32 / PRECISION) / (self.width * self.height) as f32).sqrt() 185 | } 186 | } 187 | -------------------------------------------------------------------------------- /src/timer.rs: -------------------------------------------------------------------------------- 1 | // Copyleft (ↄ) meh. | http://meh.schizofreni.co 2 | // 3 | // This file is part of dux. 4 | // 5 | // dux is free software: you can redistribute it and/or modify 6 | // it under the terms of the GNU General Public License as published by 7 | // the Free Software Foundation, either version 3 of the License, or 8 | // (at your option) any later version. 9 | // 10 | // dux is distributed in the hope that it will be useful, 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 | // GNU General Public License for more details. 14 | // 15 | // You should have received a copy of the GNU General Public License 16 | // along with dux. If not, see . 17 | 18 | use std::thread; 19 | use std::ops::Deref; 20 | use std::time::{Duration, Instant}; 21 | 22 | use crate::error; 23 | use channel::{self, Receiver, Sender, SendError}; 24 | 25 | /// Timer handler. 26 | pub struct Timer { 27 | receiver: Receiver, 28 | refresh: Sender, 29 | } 30 | 31 | #[derive(Debug)] 32 | pub enum Event { 33 | /// Sent every `refresh` milliseconds. 34 | Refresh, 35 | 36 | /// Hurts my kokoro. 37 | Heartbeat, 38 | 39 | /// The auto-save timer has fired. 40 | Save, 41 | } 42 | 43 | #[derive(Copy, Clone, Debug)] 44 | pub struct Settings { 45 | pub save: u64, 46 | pub heartbeat: u64, 47 | } 48 | 49 | impl Timer { 50 | /// Spawn the `Timer` thread. 51 | pub fn spawn(settings: Settings) -> error::Result { 52 | let (sender, receiver) = channel::unbounded(); 53 | let (refresh, refresher) = channel::unbounded(); 54 | 55 | // Spawn the refresh timer. 56 | { 57 | let sender = sender.clone(); 58 | 59 | thread::spawn(move || { 60 | while let Ok(value) = refresher.recv() { 61 | thread::sleep(Duration::from_millis(value)); 62 | sender.send(Event::Refresh).unwrap(); 63 | } 64 | }); 65 | } 66 | 67 | // Spawn the constant timers. 68 | thread::spawn(move || { 69 | let mut save = Instant::now(); 70 | let mut beat = Instant::now(); 71 | 72 | loop { 73 | thread::sleep(Duration::from_secs(1)); 74 | 75 | if save.elapsed().as_secs() >= settings.save { 76 | save = Instant::now(); 77 | sender.send(Event::Save).unwrap(); 78 | } 79 | 80 | if beat.elapsed().as_secs() >= settings.heartbeat { 81 | beat = Instant::now(); 82 | sender.send(Event::Heartbeat).unwrap(); 83 | } 84 | } 85 | }); 86 | 87 | Ok(Timer { receiver, refresh }) 88 | } 89 | 90 | /// Request a refresh after the given milliseconds. 91 | pub fn refresh(&self, value: u64) -> Result<(), SendError> { 92 | self.refresh.send(value) 93 | } 94 | } 95 | 96 | impl Deref for Timer { 97 | type Target = Receiver; 98 | 99 | fn deref(&self) -> &Self::Target { 100 | &self.receiver 101 | } 102 | } 103 | --------------------------------------------------------------------------------