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07070100000001000081A400000000000000000000000163EF9793000019FF000000000000000000000000000000000000001800000000swww-0.7.2/CHANGELOG.md### Unreleased

### 0.7.2

Improvements:
  * Images (and animations) are now cached at `$XDG_CACHE_HOME` #65
  * We now have man-pages! They must be installed manually in your system by
    moving the files in `doc/generated` to the appropriate location. Typically,
	you can figure out where that is by running `manpath`. The script
	`doc/gen.sh` will create the above directory and all the relevant manpages.
	Note that the script depends on `scdoc` being installed in the system.
	Have a look at it for more details.
  * We now also have automated spell checking. This let us fix a number in typos
    in our documentation, both internal and user-oriented.
  * New option for `swww-img`: `--sync`. This syncs the animations in all your
  monitors. Note that *all monitors must be displaying animations* in order for
  it to work.

Internal:
  * Integration tests are not run by default. You must now use
  `cargo test -- --ignored` to run them. This will make it possible for some
  people (like the ones trying to package `swww` at Nix) to run some of the
  tests in a sandboxed environment where they don't have access to the wayland
  server. If anyone is interested in running *all* tests, they can do that with
  `cargo test -- --include-ignored`.

### 0.7.1

Improvements:
  * you can now use absolute screen coordinates with `--transition-pos`
  (@flick0)

Fixes:
  * `swww query` not returning the image being displayed
  * document `--no_resize` and `--fill_color` options for `swww img`
  * reading img from stdin (now with a proper integration test to make sure
  it doesn't happen again) (#42)

Internal:
  * fixed `tests/integration_tests.rs` calling the wrong `swww-daemon` binary

### 0.7.0

**BREAKING CHANGES**

* **ATTENTION, PACKAGE MAINTAINERS** - `swww` is now composed of two separate
  binaries: `swww` and `swww-daemon`. **Both** must be installed on the user's
  system in order for `swww` to work correctly. Doing this allowed for major
  improvements in terms of overall memory usage, among other things (#52).

Improvements:
 
 * separate client and daemon (see above).
 * we don't try to animate `gif` files that have only one frame
 * we can read images from stdin (not this does not work for animated gifs; we
 simply display the image's first frame) (#42)
 * `--no-resize` option (pads the outer part of the image with `fill-color`)
 (#37)
 * new transition: `wave`, by @flick0
 * reading image format properly (instead of using file extension) (#74)

Fixes:
  * fixed panic with on gif that had identical frames (#68)
  * fixed panic with fractional-scaling (#73) (by @thedmm)

Non-breaking Changes:
 * @flick0 changed the default `transition-step`

Internal:
 * Many improvements to the README.md (@aouerfelli and @flick0)

### 0.6.0

**BREAKING CHANGES**

* `transition-speed` no longer exists. Now, speed is controlled through a
  bezier curve (`transition-bezier`), and duration (`transition-duration`)
  flags (note this also applies to the env var, SWWW_TRANSITION_SPEED). A
  warning was added when we detect the presence of the SWWW_TRANSITION_SPEED
  environment variable. This warning will go away in the next release, it is
  only there as a means of making sure everyone knows the variable has been
  superseded, and having it in your configs no longer does anything.

Improvements:

* New grow transition. Grow and outer transition now accept a --transition-pos
  command line argument. By @flick0.
  * Transitions `grow` and `outer` now both work with bezier curves (see
  breaking changes, above). This allows for finer control in animation speed
  than before. Also by @flick0.
  * Very slightly faster decompression routine

### 0.5.0

**BREAKING CHANGES**:

* `swww query` now formats its output as `<output>: ...`, instead of
  `<output> = ...`. This will break your scripts if you relied on the output's
  format.

Improvements:

* Fixed `swww` getting stuck on a futex when a new monitor was connected (#26)
  * New `wipe` transition by @flick0
  * Several small code improvements by @WhyNotHugo
  * Typo fix (@thebenperson)

### 0.4.3

* Check to see if daemon is REALLY running when we see that socket already
  exists (#11)
  * Fix dpi scaling (#22)

### 0.4.2

* Fixed #13.
  * Improved error message when daemon isn't running (#18)

### 0.4.1

* Fixed regression where the image was stretched on resize (#16)

### 0.4.0

* implemented the new transition effects

* refactored socket code

* refactored event loop initialization code, handling errors properly now

* BREAKING CHANGE: we are using fast_image_resize to resize our images now.
  This makes resizing much faster (enough to smoothly play animations before
  caching is done), but it makes it so that the `Gaussian` and `Triangle`
  filters no longer exist. Furthermore, the filters `Bilinear` and `Mitchell`
  were added.

* deleted previously deprecated `init -i` and `init -c` options

### 0.3.0

* Limited image formats to: `gif`, `jpeg`, `jpeg_rayon`, `png`, `pnm`, `tga`,
  `tiff`, `webp`, `bmp`, `farbfeld`
* Bumped rust edition to 2021
* Our custom compression is now even faster
* I did a rewrite of the way the code that handled animations was structured.
  This made caching a LOT faster, but it incurs in more memory usage, since
  we spawn an extra thread to make a pipeline. That said, since this also 
  greatly simplified the code itself, I considered it an overall positive
  change.
* Fixed a bug where the animation wouldn't stop until it had processed all the
  frames, even when it was told to.
* Setting a custom names and stack sizes to our threads. The custom name will
  help in debugging in the future, and the custom stack sizes lets us push the
  memory usage even lower.
* Did all the preparatory work for us to start writing new transition effects.
  Ideally they should come in the next version, which should hopefully also be
  our first release (since then I will consider swww to be pretty much feature
  complete).

### 0.2.0

Using unsafe to speed up decompression.
Also, `swww init -i` and `swww init -c` may now be considered deprecated.
It was originally created to bypass `swww init && swww img <path/to/img>` not
working. Now, however, it seems to be working properly. In hindsight, it was
probably already working for a while, but I failed to test it properly and
thought it was still a problem.

The `swww init -i` and `swww init -c` options shall remain for now, for 
compatibility and just in case a regression happens. Once I am confident
enough, they will be eliminated (that will let me erase around 50 lines of
code, I think).

### 0.1.0

Initial release.
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07070100000004000081A400000000000000000000000163EF97930000894D000000000000000000000000000000000000001300000000swww-0.7.2/LICENSE                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

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07070100000005000081A400000000000000000000000163EF979300001B58000000000000000000000000000000000000001500000000swww-0.7.2/README.md# A Solution to your Wayland Wallpaper Woes
### Efficient animated wallpaper daemon for wayland, controlled at runtime

![animated gif demonstration](https://i.imgur.com/Leuh6wm.gif)
![image transition demonstration](../demos/assets/grow.gif)

## Dependencies

- a compositor that implements:
   * wlr-layer-shell (typically wlroots based compositors)
   * xdg-output
 - [lz4](https://github.com/lz4/lz4) (for compressing frames when animating)

## Build

### Dependencies:

- Up to date stable rustc compiler and cargo

To build, clone this repository and run:
```
cargo build --release
```
Then, put **both binaries** `target/release/swww` and
`target/release/swww-daemon` in your  path. Optionally, autocompletion scripts
for bash, zsh, fish and elvish are offered in the `completions` directory.

#### Man pages:

In order to generate the man pages, **you must have `scdoc` installed**. Run

```
./doc/gen.sh
```

The man pages will be in `doc/generated`. To install them, you must move them to
to the appropriate location in your system. You should be able to figure out
where that is by running `manpath`.

## Features

- Display animated gifs on your desktop
 - Display any image in the formats:
   * jpeg
   * png
   * gif
   * pnm
   * tga
   * tiff
   * webp
   * bmp
   * farbfeld
 - Clear the screen with an arbitrary rrggbb color
 - Smooth transition effect when you switch images
 - Do all of that without having to shutdown and reinitialize the daemon

## Why

There are two main reasons that compelled me to make this: the first is that
[`oguri`](https://github.com/vilhalmer/oguri) is unmaintained and archived,
despite there being serious problems with excess of memory use while displaying
certain gifs (see [this](https://github.com/vilhalmer/oguri/issues/38), for
example). The best alternative I've found for `oguri` was
[`mpvpaper`](https://github.com/GhostNaN/mpvpaper), but if felt overkill for my
purposes.

Comparing to `oguri`, `swww` uses less cpu power to animate once it has cached
all the frames in the animation. It should also be **significantly** more
memory efficient.

The second is that, to my knowledge, there is no wallpaper daemon for wayland
that allows you to change the wallpaper at runtime. That is, in order to, for
example, cycle through the images of a directory, you'd have to kill the daemon
and restart it. Not only does it make simple shell scripts a pain to write, it
makes switching from one image to the next to happen very abruptly.

## Usage

Start by initializing the daemon:
```
swww init
```
Then, simply pass the image you want to display:
```
swww img <path/to/img>

# You can also specify outputs:
swww img -o <outputs> <path/to/img>

# Control how smoothly the transition will happen and/or it's frame rate
# For the step, smaller values = more smooth. Default = 20
# For the frame rate, default is 30.
swww img <path/to/img> --transition-step <1 to 255> --transition-fps <1 to 255>

# There are also many different transition effects:
swww img <path/to/img> --transition-type center

# Note you may also control the above by setting up the SWWW_TRANSITION_FPS,
# SWWW_TRANSITION_STEP, and SWWW_TRANSITION_TYPE environment variables.

# To see all options, run
swww img --help
```
If you would like to know the valid values for *\<outputs\>*, you can query the
daemon. This will also tell you what the current image being displayed is, as
well as the dimensions detected for the outputs. If you need more detailed
information, I would recommend using
[`wlr-randr`](https://sr.ht/~emersion/wlr-randr/).
```
swww query
```
Finally, to stop the daemon, kill it:
```
swww kill
```
For a more complete description, run `swww --help` or `swww <subcommand>
--help`.

Finally, to get a feel for what you can do with some shell scripting, check out
the [example_scripts](/example_scripts/) folder. It can help you get started.

## Transitions

#### Example wipe transition:

> wipe transition with angle set to 30 deg

![top transition demonstration](../demos/assets/wipe.gif)

The `left`, `right`, `top` and `bottom` transitions all work similarly.

#### Example outer transition

![outer transition demonstration](../demos/assets/outer.gif)

The `center` transition is the opposite: it starts from the center and goes 
towards the edges.

There is also `simple`, which simply fades into the new image, `any`, which 
starts at a random point with either `center` of `outer` transitions, and `random`,
which selects a transition effect at random.

## Troubleshooting

#### High cpu usage during caching of a gif's frames

`swww` will use a non-insignificant amount of cpu power while caching the
images. This will be specially noticeable if the images need to be resized
before being displayed. So, if you have a very large gif, I would recommend
resizing it **before** sending it to `swww`. That would make the caching phase
much faster, and thus ultimately reduce power consumption. I can personally
recommend [`gifsicle`](https://github.com/kohler/gifsicle) for this purpose.

## About new features

Broadly speaking, **NEW FEATURES WILL NOT BE ADDED, UNLESS THEY ARE EGREGIOUSLY
SIMPLE**. I made `swww` with the specific usecase of making shell scripts in
mind. So, for example, stuff like timed wallpapers, or a setup that loads a
different image at different times of the day, and so on, should all be done by
combining `swww` with other programs (see the [example_scripts](/example_scripts/) for some
examples).

If you really want some new feature within `swww` itself, I would recommend
forking the repository.

## Alternatives

`swww` isn't really the simplest, mostest minimalest software you could find
for managing wallpapers. If you are looking for something simpler, have a look
at the [awesome-wayland repository list of wallpaper programs
](https://github.com/natpen/awesome-wayland#wallpaper). I can personally
recommend:

- [`wbg`](https://codeberg.org/dnkl/wbg) - probably the simplest of them all.
 Strongly recommend if you just care about setting a single png as your
 permanent wallpaper on something like a laptop.
 - [`swaybg`](https://github.com/swaywm/swaybg) - made by the wlroots gods
 themselves.
 - [`mpvpaper`](https://github.com/GhostNaN/mpvpaper) - if you want to display
 videos as your wallpapers. This is also what I used for gifs before making
 `swww`.

## Acknowledgments

A huge thanks to everyone involed in the [smithay](https://github.com/Smithay)
project. Making this program would not have been possible without it. In fact,
the first versions of swww were quite literally copy pasted from the
[layer shell example in the client-toolkit
](https://github.com/Smithay/client-toolkit/blob/master/examples/layer_shell.rs).

A big thank-you also to [HakierGrzonzo](https://github.com/HakierGrzonzo), for
setting up the AUR package.
07070100000006000081A400000000000000000000000163EF9793000000B7000000000000000000000000000000000000001000000000swww-0.7.2/TODOUse clap ValueEnum for our enums. Also use arggroup to deny invalid arguments

Fully automated, complete testing, for every option

See if transitions can be calculated in the client
07070100000007000081A400000000000000000000000163EF9793000002EB000000000000000000000000000000000000001400000000swww-0.7.2/build.rsuse std::io::Error;

use clap::CommandFactory;
use clap_complete::{generate_to, Shell};

include!("src/cli.rs");

const COMPLETION_DIR: &str = "completions";
const APP_NAME: &str = "swww";

fn main() -> Result<(), Error> {
    let outdir = completion_dir()?;
    let mut app = Swww::command();

let shells = [Shell::Bash, Shell::Zsh, Shell::Fish, Shell::Elvish];
    for shell in shells {
        let comp_file = generate_to(shell, &mut app, APP_NAME, &outdir)?;
        println!("cargo:warning=generated shell completion file: {comp_file:?}");
    }
    Ok(())
}

fn completion_dir() -> std::io::Result<PathBuf> {
    let path = PathBuf::from(COMPLETION_DIR);
    if !path.is_dir() {
        std::fs::create_dir(&path)?;
    }
    Ok(path)
}
07070100000008000041ED00000000000000000000000363EF979300000000000000000000000000000000000000000000001200000000swww-0.7.2/daemon07070100000009000081A400000000000000000000000163EF9793000001CE000000000000000000000000000000000000001D00000000swww-0.7.2/daemon/Cargo.toml[package]
name = "swww-daemon"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
smithay-client-toolkit = { version = "0.16", default-features = false, features = ["calloop"] }
log = { version = "0.4", features = ["max_level_debug", "release_max_level_info"] }
simplelog = "0.12"
keyframe = "1.1.1"

utils = { path = "../utils" }

[dev-dependencies]
rand = "0.8"
0707010000000A000041ED00000000000000000000000363EF979300000000000000000000000000000000000000000000001600000000swww-0.7.2/daemon/src0707010000000B000081A400000000000000000000000163EF979300004CC9000000000000000000000000000000000000001E00000000swww-0.7.2/daemon/src/main.rsuse log::{debug, error, info, warn};
use simplelog::{ColorChoice, LevelFilter, TermLogger, TerminalMode, ThreadLogMode};

use smithay_client_toolkit::{
    environment::Environment,
    get_surface_scale_factor,
    output::{with_output_info, OutputInfo},
    reexports::{
        calloop::{
            self,
            channel::{self, Channel},
            signals::{self, Signal},
            LoopHandle, LoopSignal,
        },
        client::protocol::{wl_output, wl_shm, wl_surface},
        client::{protocol::wl_compositor, Attached, Display, EventQueue, Main},
        protocols::wlr::unstable::layer_shell::v1::client::{
            zwlr_layer_shell_v1, zwlr_layer_surface_v1,
        },
    },
    shm::MemPool,
    WaylandSource,
};

use std::{
    cell::{Cell, RefCell, RefMut},
    fs,
    os::unix::net::{UnixListener, UnixStream},
    rc::Rc,
};

use utils::{
    communication::{get_socket_path, Answer, BgImg, BgInfo, Clear, Img, Request},
    comp_decomp::ReadiedPack,
};

mod processor;
mod wayland;

use processor::{ImgWithDim, Processor};

#[derive(PartialEq, Copy, Clone)]
enum RenderEvent {
    Configure { width: u32, height: u32 },
    Closed,
}

struct Bg {
    info: BgInfo,
    surface: wl_surface::WlSurface,
    layer_surface: Main<zwlr_layer_surface_v1::ZwlrLayerSurfaceV1>,
    next_render_event: Rc<Cell<Option<RenderEvent>>>,
    pool: MemPool,
}

impl Bg {
    fn new(
        output: &wl_output::WlOutput,
        output_name: String,
        surface: wl_surface::WlSurface,
        layer_shell: &Attached<zwlr_layer_shell_v1::ZwlrLayerShellV1>,
        pool: MemPool,
    ) -> Self {
        let layer_surface = layer_shell.get_layer_surface(
            &surface,
            Some(output),
            zwlr_layer_shell_v1::Layer::Background,
            "swww".to_owned(),
        );

layer_surface.set_anchor(zwlr_layer_surface_v1::Anchor::all());
        layer_surface.set_exclusive_zone(-1);

// Commit so that the server will send a configure event
        surface.commit();

Self {
            surface,
            layer_surface,
            next_render_event,
            pool,
            info: BgInfo {
                name: output_name,
                dim: (0, 0),
                scale_factor: 1,
                img: BgImg::Color([0, 0, 0]),
            },
        }
    }

/// Handles any events that have occurred since the last call, redrawing if needed.
    /// Returns whether the surface was configured or not.
    /// If it was, returns whether or not it should be dropped
    fn handle_events(&mut self) -> Option<bool> {
        match self.next_render_event.take() {
            Some(RenderEvent::Closed) => Some(true),
            Some(RenderEvent::Configure { width, height }) => {
                let scale_factor = get_surface_scale_factor(&self.surface);
                if self.info.dim != (width, height) || self.info.scale_factor != scale_factor {
                    self.surface.set_buffer_scale(scale_factor);
                    self.info.dim = (width, height);
                    self.info.scale_factor = scale_factor;
                    let width = width as usize * scale_factor as usize;
                    let height = height as usize * scale_factor as usize;
                    if let Err(e) = self.pool.resize(width * height * 4) {
                        error!("failed to resize {} memory pool: {e}", &self.info.name);
                    }

// We must clear the outputs so that animations work due to the new underlying
                    // buffer needing to be the exact size of the monitor's.
                    self.clear([0, 0, 0]);
                    debug!("Configured {}", self.info);
                    Some(false)
                } else {
                    debug!("Output {} is already configured correctly", self.info.name);
                    None
                }
            }
            None => None,
        }
    }

///'color' argument is in rbg. We copy it correctly to brgx inside the function
    fn clear(&mut self, color: [u8; 3]) {
        self.info.img = BgImg::Color(color);
        let dim = self.info.real_dim();
        let stride = 4 * dim.0 as i32;
        let width = dim.0 as i32;
        let height = dim.1 as i32;

let buffer = self
            .pool
            .buffer(0, width, height, stride, wl_shm::Format::Xrgb8888);

let canvas = self.pool.mmap();
        for pixel in canvas.chunks_exact_mut(4) {
            pixel[0] = color[2];
            pixel[1] = color[1];
            pixel[2] = color[0];
        }
        debug!("Clearing output: {}", self.info.name);
        self.surface.attach(Some(&buffer), 0, 0);
        self.surface.damage_buffer(0, 0, width, height);
        self.surface.commit();
    }

fn draw(&mut self, img: &ReadiedPack) {
        let dim = self.info.real_dim();
        let stride = 4 * dim.0 as i32;
        let width = dim.0 as i32;
        let height = dim.1 as i32;

let buffer = self
            .pool
            .buffer(0, width, height, stride, wl_shm::Format::Xrgb8888);
        let canvas = self.pool.mmap();
        if !img.unpack(canvas) {
            error!("buf_len different from expected_buf_size");
        }
        debug!("Decompressed img.");

self.surface.attach(Some(&buffer), 0, 0);
        self.surface.damage_buffer(0, 0, width, height);
        self.surface.commit();
    }

///This method is what makes necessary that we use the mempoll, instead of the "easier"
    ///automempoll
    fn get_current_img(&mut self) -> &[u8] {
        let dim = self.info.real_dim();
        let size = dim.0 as usize * dim.1 as usize * 4;
        &self.pool.mmap()[0..size]
    }

fn get_current_img_mut(&mut self) -> &mut [u8] {
        let dim = self.info.real_dim();
        let size = dim.0 as usize * dim.1 as usize * 4;
        &mut self.pool.mmap()[0..size]
    }
}

impl Drop for Bg {
    fn drop(&mut self) {
        self.layer_surface.destroy();
        self.surface.destroy();
    }
}

fn main() -> Result<(), String> {
    make_logger();

let listener = make_socket()?;
    debug!(
        "Made socket in {:?} and initialized logger. Starting daemon...",
        listener.local_addr().unwrap() //this should always work if the socket connected correctly
    );

let (env, display, queue) = wayland::make_wayland_environment();

let bgs = Rc::new(RefCell::new(Vec::new()));

let layer_shell = env.require_global::<zwlr_layer_shell_v1::ZwlrLayerShellV1>();

let _listner_handle =
        env.listen_for_outputs(move |output, info, _| output_handler(output, info));

//NOTE: we can't move display into the function because it causes a segfault
    main_loop(&bgs, queue, &display, listener)?;
    info!("Finished running event loop.");

info!("Goodbye!");
    Ok(())
}

fn make_logger() {
    let config = simplelog::ConfigBuilder::new()
        .set_thread_level(LevelFilter::Info) //let me see where the processing is happening
        .set_thread_mode(ThreadLogMode::Both)
        .build();

TermLogger::init(
        LevelFilter::Debug,
        config,
        TerminalMode::Stderr,
        ColorChoice::AlwaysAnsi,
    )
    .expect("Failed to initialize logger. Cancelling...");
}

fn create_backgrounds(
    output: &wl_output::WlOutput,
    info: &OutputInfo,
    env: &Environment<wayland::Env>,
    bgs: &Rc<RefCell<Vec<Bg>>>,
    layer_shell: &Attached<zwlr_layer_shell_v1::ZwlrLayerShellV1>,
) {
    if info.obsolete {
        // an output has been removed, release it
        bgs.borrow_mut().retain(|bg| bg.info.name != info.name);
        output.release();
    } else {
        // an output has been created, construct a surface for it
        let surface = env.create_surface().detach();
        let pool = env
            .create_simple_pool(|_dispatch_data| {
                //do I need to do something here???
            })
            .expect("Failed to create a memory pool!");

// Wayland clients are expected to render the cursor on their input region. By setting the
        // input region to an empty region, the compositor renders the default cursor. Without
        // this, and empty desktop won't render a cursor.
        let compositor = env.require_global::<wl_compositor::WlCompositor>();
        let empty_region = compositor.create_region();
        surface.set_input_region(Some(&empty_region));

// From `wl_surface::set_opaque_region`:
        // > Setting the pending opaque region has copy semantics, and the
        // > wl_region object can be destroyed immediately.
        empty_region.destroy();

debug!("New background with output: {:?}", info);
        let bg = Bg::new(output, info.name.clone(), surface, layer_shell, pool);
        bgs.borrow_mut().push(bg);
    }
}

fn make_socket() -> Result<UnixListener, String> {
    let socket_addr = get_socket_path();
    let runtime_dir = match socket_addr.parent() {
        Some(path) => path,
        None => return Err("couldn't find a valid runtime directory".to_owned()),
    };

if !runtime_dir.exists() {
        match fs::create_dir(runtime_dir) {
            Ok(()) => (),
            Err(e) => return Err(format!("failed to create runtime dir: {e}")),
        }
    }

let listener = match UnixListener::bind(socket_addr) {
        Ok(address) => address,
        Err(e) => return Err(format!("couldn't bind socket: {e}")),
    };

Ok(listener)
}

fn register_signals(handle: &LoopHandle<LoopSignal>) -> Result<(), String> {
    match signals::Signals::new(&[Signal::SIGINT, Signal::SIGQUIT, Signal::SIGTERM]) {
        Ok(signals) => {
            if let Err(e) = handle.insert_source(signals, |_, _, loop_signal| loop_signal.stop()) {
                Err(format!("failed to insert signals source: {e}"))
            } else {
                Ok(())
            }
        }
        Err(e) => Err(format!("failed to register signals to stop program: {e}")),
    }
}

fn register_channel<'a>(
    handle: &LoopHandle<'a, LoopSignal>,
    bgs: &'a Rc<RefCell<Vec<Bg>>>,
    fr_recv: Channel<(Vec<String>, ReadiedPack)>,
) -> Result<(), String> {
    if let Err(e) = handle.insert_source(fr_recv, |evt, _, loop_signal| match evt {
        channel::Event::Msg(msg) => handle_recv_img(&mut bgs.borrow_mut(), &msg),
        channel::Event::Closed => loop_signal.stop(),
    }) {
        return Err(format! {"failed to register channel: {e}"});
    }
    Ok(())
}

fn register_socket<'a>(
    handle: &LoopHandle<'a, LoopSignal>,
    bgs: &'a Rc<RefCell<Vec<Bg>>>,
    display: &'a Display,
    processor: &'a Rc<RefCell<Processor>>,
    listener: UnixListener,
) -> Result<(), String> {
    if let Err(e) = listener.set_nonblocking(true) {
        return Err(format!("failed to set nonblocking mode for socket: {e}"));
    };
    if let Err(e) = handle.insert_source(
        calloop::generic::Generic::new(listener, calloop::Interest::READ, calloop::Mode::Level),
        |_, listener, loop_signal| {
            let mut processor = processor.borrow_mut();
            match listener.accept() {
                Ok((stream, _)) => {
                    match recv_socket_msg(bgs.borrow_mut(), stream, loop_signal, &mut processor) {
                        Err(e) => error!("Failed to receive socket message: {}", e),
                        Ok(()) => {
                            //We must flush here because if multiple requests are sent at once the loop
                            //might never be idle, and so the callback in the run function below
                            //wouldn't be called (afaik)
                            if let Err(e) = display.flush() {
                                error!("Couldn't flush display: {}", e);
                            }
                        }
                    }
                }
                Err(e) => error!("Failed to accept connection: {}", e),
            }
            Ok(calloop::PostAction::Continue)
        },
    ) {
        return Err(format! {"failed to register socket: {e}"});
    }
    Ok(())
}
///bgs and display can't be moved into here because it causes a segfault
fn main_loop(
    bgs: &Rc<RefCell<Vec<Bg>>>,
    queue: EventQueue,
    display: &Display,
    listener: UnixListener,
) -> Result<(), String> {
    //We use 1 because we can't send a new frame without being absolutely sure that all previous
    //have already been displayed. Using 0 causes the animation to stop.
    let (frame_sender, frame_receiver) = calloop::channel::sync_channel(1);
    let processor = Rc::new(RefCell::new(Processor::new(frame_sender)));
    let mut event_loop = match calloop::EventLoop::<calloop::LoopSignal>::try_new() {
        Ok(el) => el,
        Err(e) => return Err(e.to_string()),
    };
    let event_handle = event_loop.handle();

register_signals(&event_handle)?;
    register_channel(&event_handle, bgs, frame_receiver)?;
    register_socket(&event_handle, bgs, display, &processor, listener)?;

if let Err(e) = WaylandSource::new(queue).quick_insert(event_handle) {
        return Err(e.to_string());
    }

info!("Initialization succeeded! Starting main loop...");
    let mut loop_signal = event_loop.get_signal();
    if let Err(e) = event_loop.run(None, &mut loop_signal, |_| {
        {
            let mut bgs = bgs.borrow_mut();
            let mut i = 0;
            while i != bgs.len() {
                if let Some(should_remove) = bgs[i].handle_events() {
                    let mut processor = processor.borrow_mut();
                    processor.set_output_count(bgs.len() as u8);
                    processor.stop_animations(&[bgs[i].info.name.clone()]);
                    if should_remove {
                        bgs.remove(i);
                    } else {
                        let info = bgs[i].info.clone();
                        let old_img = bgs[i].get_current_img_mut();
                        if let Some(path) = processor.import_cached_img(info, old_img) {
                            bgs[i].info.img = BgImg::Img(path);
                        }
                        i += 1;
                    }
                } else {
                    i += 1;
                }
            }
        }
        if let Err(e) = display.flush() {
            error!("Couldn't flush display: {}", e);
        }
    }) {
        return Err(format!("Event loop closed unexpectedly: {e}"));
    }

Ok(())
}

fn recv_socket_msg(
    mut bgs: RefMut<Vec<Bg>>,
    stream: UnixStream,
    loop_signal: &calloop::LoopSignal,
    proc: &mut Processor,
) -> Result<(), String> {
    let request = Request::receive(&stream);
    let answer = match request {
        Ok(Request::Animation(animations)) => {
            let mut result = Answer::Ok;
            for animation in &animations {
                for output in &animation.1 {
                    if !bgs.iter().any(|bg| &bg.info.name == output) {
                        result = Answer::Err(format!("Output {output} doesn't exit"));
                        break;
                    }
                }
            }
            if matches!(result, Answer::Err(_)) {
                result
            } else {
                for animation in animations {
                    let bg = bgs.iter().find(|bg| animation.1.contains(&bg.info.name));
                    if bg.is_none() {
                        continue;
                    }
                    //unwraping is fine because we test it above
                    let dim = bg.unwrap().info.real_dim();
                    let size = dim.0 as usize * dim.1 as usize * 4;
                    if let Answer::Err(e) = proc.animate(animation.0, animation.1, size) {
                        result = Answer::Err(e);
                    }
                }
                result
            }
        }
        Ok(Request::Clear(clear)) => clear_outputs(&mut bgs, &clear, proc),
        Ok(Request::Kill) => {
            loop_signal.stop();
            Answer::Ok
        }
        Ok(Request::Img(img)) => {
            let old_imgs = get_old_imgs(&mut bgs, &img.1);
            if old_imgs.len() != img.1.len() {
                Answer::Err("Daemon received request for outputs that don't exist".to_string())
            } else {
                proc.transition(&img.0, img.1, old_imgs)
            }
        }
        Ok(Request::Init { .. }) => Answer::Ok,
        Ok(Request::Query) => Answer::Info(bgs.iter().map(|bg| bg.info.clone()).collect()),
        Err(e) => Answer::Err(e),
    };
    answer.send(&stream)
}

fn get_old_imgs(bgs: &mut RefMut<Vec<Bg>>, imgs: &[(Img, Vec<String>)]) -> Vec<ImgWithDim> {
    let mut v = Vec::with_capacity(imgs.len());

for (img, outputs) in imgs {
        if let Some(bg) = bgs.iter_mut().find(|bg| bg.info.name == outputs[0]) {
            v.push((bg.get_current_img().into(), bg.info.real_dim()));
        }
        for bg in bgs.iter_mut().filter(|bg| outputs.contains(&bg.info.name)) {
            bg.info.img = BgImg::Img(img.path.clone());
        }
    }

v
}

fn handle_recv_img(bgs: &mut RefMut<Vec<Bg>>, msg: &(Vec<String>, ReadiedPack)) {
    let (outputs, img) = msg;
    if outputs.is_empty() {
        warn!("Received empty list of outputs from processor, which should be impossible");
    }
    bgs.iter_mut()
        .filter(|bg| outputs.contains(&bg.info.name))
        .for_each(|bg| bg.draw(img));
}

//TODO: error when no output was valid
fn clear_outputs(bgs: &mut RefMut<Vec<Bg>>, clear: &Clear, proc: &mut Processor) -> Answer {
    proc.stop_animations(&clear.outputs);
    if clear.outputs.is_empty() {
        bgs.iter_mut().for_each(|bg| bg.clear(clear.color));
    } else {
        bgs.iter_mut()
            .filter(|bg| clear.outputs.contains(&bg.info.name))
            .for_each(|bg| bg.clear(clear.color));
    }
    Answer::Ok
}
0707010000000C000041ED00000000000000000000000263EF979300000000000000000000000000000000000000000000002000000000swww-0.7.2/daemon/src/processor0707010000000D000081A400000000000000000000000163EF979300003D8C000000000000000000000000000000000000002E00000000swww-0.7.2/daemon/src/processor/animations.rsuse smithay_client_toolkit::reexports::calloop::channel::SyncSender;
use std::{
    sync::mpsc,
    time::{Duration, Instant},
};

use log::debug;
use utils::{
    communication::{Position, TransitionType},
    comp_decomp::ReadiedPack,
};

use super::send_frame;

use keyframe::{
    functions::BezierCurve, keyframes, mint::Vector2, num_traits::Pow, AnimationSequence,
};

macro_rules! send_transition_frame {
    ($img:ident, $outputs:ident, $now:ident, $fps:ident, $sender:ident, $stop_recv:ident) => {
        if $img.is_empty() {
            debug!("Transition has finished.");
            return;
        }
        let timeout = $fps.saturating_sub($now.elapsed());
        if send_frame($img, $outputs, timeout, $sender, $stop_recv) {
            debug!("Transition was interrupted!");
            return;
        }
    };
}

pub struct Transition {
    old_img: Box<[u8]>,
    dimensions: (u32, u32),
    transition_type: TransitionType,
    duration: f32,
    step: u8,
    fps: Duration,
    angle: f64,
    pos: Position,
    bezier: BezierCurve,
    wave: (f32, f32),
}

/// All transitions return whether or not they completed
impl Transition {
    pub fn new(
        old_img: Box<[u8]>,
        dimensions: (u32, u32),
        transition: utils::communication::Transition,
    ) -> Self {
        Transition {
            old_img,
            dimensions,
            transition_type: transition.transition_type,
            duration: transition.duration,
            step: transition.step,
            fps: Duration::from_nanos(1_000_000_000 / transition.fps as u64),
            angle: transition.angle,
            pos: transition.pos,
            bezier: BezierCurve::from(
                Vector2 {
                    x: transition.bezier.0,
                    y: transition.bezier.1,
                },
                Vector2 {
                    x: transition.bezier.2,
                    y: transition.bezier.3,
                },
            ),
            wave: transition.wave,
        }
    }

pub fn execute(
        self,
        new_img: &[u8],
        outputs: &mut Vec<String>,
        sender: &SyncSender<(Vec<String>, ReadiedPack)>,
        stop_recv: &mpsc::Receiver<Vec<String>>,
    ) {
        debug!("Starting transition");
        match self.transition_type {
            TransitionType::Simple => self.simple(new_img, outputs, sender, stop_recv),
            TransitionType::Wipe => self.wipe(new_img, outputs, sender, stop_recv),
            TransitionType::Grow => self.grow(new_img, outputs, sender, stop_recv),
            TransitionType::Outer => self.outer(new_img, outputs, sender, stop_recv),
            TransitionType::Wave => self.wave(new_img, outputs, sender, stop_recv),
        }
    }

fn bezier_seq(&self, start: f32, end: f32) -> (AnimationSequence<f32>, Instant) {
        (
            keyframes![(start, 0.0, self.bezier), (end, self.duration, self.bezier)],
            Instant::now(),
        )
    }

fn simple(
        mut self,
        new_img: &[u8],
        outputs: &mut Vec<String>,
        sender: &SyncSender<(Vec<String>, ReadiedPack)>,
        stop_recv: &mpsc::Receiver<Vec<String>>,
    ) {
        let fps = self.fps;
        let mut now = Instant::now();
        loop {
            let transition_img =
                ReadiedPack::new(&mut self.old_img, new_img, |old_pix, new_pix, _| {
                    change_cols(self.step, old_pix, *new_pix);
                });
            send_transition_frame!(transition_img, outputs, now, fps, sender, stop_recv);
            now = Instant::now();
        }
    }

fn wave(
        mut self,
        new_img: &[u8],
        outputs: &mut Vec<String>,
        sender: &SyncSender<(Vec<String>, ReadiedPack)>,
        stop_recv: &mpsc::Receiver<Vec<String>>,
    ) {
        let fps = self.fps;
        let width = self.dimensions.0;
        let height = self.dimensions.1;
        let mut now = Instant::now();
        let center = (width / 2, height / 2);
        let screen_diag = ((width.pow(2) + height.pow(2)) as f64).sqrt();

let angle = self.angle.to_radians();
        let (scale_x, scale_y) = (self.wave.0 as f64, self.wave.1 as f64);

let circle_radius = screen_diag / 2.0;

let f = |x: f64| (x / scale_x).sin() * scale_y;

// graph: https://www.desmos.com/calculator/wunde042es
        //
        // checks if a pixel is to the left or right of the line
        let is_low = |x: f64, y: f64, offset: f64| {
            let x = x - center.0 as f64;
            let y = y - center.1 as f64;

let lhs = y * angle.cos() - x * angle.sin();
            let rhs = f(x * angle.cos() + y * angle.sin()) + circle_radius - offset;
            lhs >= rhs
        };

// find the offset to start the transition at
        let mut offset = {
            let mut offset = 0.0;
            for x in 0..width {
                for y in 0..height {
                    if is_low(x as f64, y as f64, offset) {
                        offset += 1.0;
                        break;
                    }
                }
            }
            offset
        };
        let max_offset = 2.0 * circle_radius - offset;

let (mut seq, start) = self.bezier_seq(offset as f32, max_offset as f32);

let step = self.step;

loop {
            let transition_img =
                ReadiedPack::new(&mut self.old_img, new_img, |old_pix, new_pix, i| {
                    let width = width as usize;
                    let height = height as usize;
                    let pix_x = i % width;
                    let pix_y = height - i / width;
                    if is_low(pix_x as f64, pix_y as f64, offset) {
                        change_cols(step, old_pix, *new_pix);
                    }
                });
            send_transition_frame!(transition_img, outputs, now, fps, sender, stop_recv);
            now = Instant::now();

offset = seq.now() as f64;
            seq.advance_to(start.elapsed().as_secs_f64());
            if start.elapsed().as_secs_f64() >= seq.duration() {
                break;
            }
        }
        self.simple(new_img, outputs, sender, stop_recv)
    }

fn wipe(
        mut self,
        new_img: &[u8],
        outputs: &mut Vec<String>,
        sender: &SyncSender<(Vec<String>, ReadiedPack)>,
        stop_recv: &mpsc::Receiver<Vec<String>>,
    ) {
        let fps = self.fps;
        let width = self.dimensions.0;
        let height = self.dimensions.1;
        let mut now = Instant::now();
        let center = (width / 2, height / 2);
        let screen_diag = ((width.pow(2) + height.pow(2)) as f64).sqrt();

let circle_radius = screen_diag / 2.0;
        let max_offset = circle_radius.pow(2) * 2.0;

let angle = self.angle.to_radians();

let mut offset = {
            let (x, y) = angle.sin_cos();
            (x.abs() * width as f64 / 2.0 + y.abs() * height as f64 / 2.0).abs()
        };

// line formula: (x-h)*a + (y-k)*b + C = r^2
        // https://www.desmos.com/calculator/vpvzk12yar
        //
        // checks if a pixel is to the left or right of the line
        let is_low = |pix_x: f64, pix_y: f64, offset: f64, radius: f64| {
            let a = radius * angle.cos();
            let b = radius * angle.sin();
            let x = pix_x - center.0 as f64;
            let y = pix_y - center.1 as f64;
            let res = x * a + y * b + offset;
            res >= radius.pow(2)
        };

let (mut seq, start) = self.bezier_seq(0.0, max_offset as f32);

let step = self.step;

loop {
            let transition_img =
                ReadiedPack::new(&mut self.old_img, new_img, |old_pix, new_pix, i| {
                    let width = width as usize;
                    let height = height as usize;
                    let pix_x = i % width;
                    let pix_y = height - i / width;
                    if is_low(pix_x as f64, pix_y as f64, offset, circle_radius) {
                        change_cols(step, old_pix, *new_pix);
                    }
                });
            send_transition_frame!(transition_img, outputs, now, fps, sender, stop_recv);
            now = Instant::now();

fn grow(
        mut self,
        new_img: &[u8],
        outputs: &mut Vec<String>,
        sender: &SyncSender<(Vec<String>, ReadiedPack)>,
        stop_recv: &mpsc::Receiver<Vec<String>>,
    ) {
        let fps = self.fps;
        let (width, height) = (self.dimensions.0 as f32, self.dimensions.1 as f32);
        let (center_x, center_y) = self.pos.to_pixel(self.dimensions);
        let mut dist_center: f32 = 0.0;
        let dist_end: f32 = {
            let mut x = center_x;
            let mut y = center_y;
            if x < width / 2.0 {
                x = width - 1.0 - x;
            }
            if y < height / 2.0 {
                y = height - 1.0 - y;
            }
            f32::sqrt(x.pow(2) + y.pow(2))
        };
        let mut now = Instant::now();

let (mut seq, start) = self.bezier_seq(0.0, dist_end);

loop {
            let transition_img =
                ReadiedPack::new(&mut self.old_img, new_img, |old_pix, new_pix, i| {
                    let (width, height) = (width as usize, height as usize);
                    let pix_x = i % width;
                    let pix_y = height - i / width;
                    let diff_x = pix_x.abs_diff(center_x as usize) as f32;
                    let diff_y = pix_y.abs_diff(center_y as usize) as f32;
                    let pix_center_dist = f32::sqrt(diff_x.pow(2) + diff_y.pow(2));
                    if pix_center_dist <= dist_center {
                        let step = self
                            .step
                            .saturating_add((dist_center - pix_center_dist).log2() as u8);
                        change_cols(step, old_pix, *new_pix);
                    }
                });
            send_transition_frame!(transition_img, outputs, now, fps, sender, stop_recv);
            now = Instant::now();
            dist_center = seq.now();
            seq.advance_to(start.elapsed().as_secs_f64());
            if start.elapsed().as_secs_f64() >= seq.duration() {
                break;
            }
        }
        self.simple(new_img, outputs, sender, stop_recv)
    }

fn outer(
        mut self,
        new_img: &[u8],
        outputs: &mut Vec<String>,
        sender: &SyncSender<(Vec<String>, ReadiedPack)>,
        stop_recv: &mpsc::Receiver<Vec<String>>,
    ) {
        let fps = self.fps;
        let (width, height) = (self.dimensions.0 as f32, self.dimensions.1 as f32);
        let (center_x, center_y) = self.pos.to_pixel(self.dimensions);
        let mut dist_center = {
            let mut x = center_x;
            let mut y = center_y;
            if x < width / 2.0 {
                x = width - 1.0 - x;
            }
            if y < height / 2.0 {
                y = height - 1.0 - y;
            }
            f32::sqrt(x.pow(2) + y.pow(2))
        };
        let mut now = Instant::now();

let (mut seq, start) = self.bezier_seq(dist_center, 0.0);

loop {
            let transition_img =
                ReadiedPack::new(&mut self.old_img, new_img, |old_pix, new_pix, i| {
                    let (width, height) = (width as usize, height as usize);
                    let pix_x = i % width;
                    let pix_y = height - i / width;
                    let diff_x = pix_x.abs_diff(center_x as usize) as f32;
                    let diff_y = pix_y.abs_diff(center_y as usize) as f32;
                    let pix_center_dist = f32::sqrt(diff_x.pow(2) + diff_y.pow(2));
                    if pix_center_dist >= dist_center {
                        let step = self
                            .step
                            .saturating_add((pix_center_dist - dist_center).log2() as u8);
                        change_cols(step, old_pix, *new_pix);
                    }
                });
            send_transition_frame!(transition_img, outputs, now, fps, sender, stop_recv);
            now = Instant::now();

dist_center = seq.now();
            seq.advance_to(start.elapsed().as_secs_f64());

if start.elapsed().as_secs_f64() >= seq.duration() {
                break;
            }
        }
        self.simple(new_img, outputs, sender, stop_recv)
    }
}

fn change_cols(step: u8, old: &mut [u8; 4], new: [u8; 4]) {
    for (old_col, new_col) in old.iter_mut().zip(new) {
        if old_col.abs_diff(new_col) < step {
            *old_col = new_col;
        } else if *old_col > new_col {
            *old_col -= step;
        } else {
            *old_col += step;
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use keyframe::mint::Vector2;
    use smithay_client_toolkit::reexports::calloop::channel::{self, Channel, SyncSender};
    use utils::communication::Coord;

#[allow(clippy::type_complexity)]
    fn make_senders_and_receivers() -> (
        (
            SyncSender<(Vec<String>, ReadiedPack)>,
            Channel<(Vec<String>, ReadiedPack)>,
        ),
        (mpsc::Sender<Vec<String>>, mpsc::Receiver<Vec<String>>),
    ) {
        (channel::sync_channel(20000), mpsc::channel())
    }

fn make_test_boxes() -> (Box<[u8]>, Box<[u8]>) {
        let mut vec1 = Vec::with_capacity(4000);
        let mut vec2 = Vec::with_capacity(4000);

for _ in 0..4000 {
            vec1.push(rand::random());
            vec2.push(rand::random());
        }

(vec1.into_boxed_slice(), vec2.into_boxed_slice())
    }

fn test_transition(old_img: Box<[u8]>, transition_type: TransitionType) -> Transition {
        Transition {
            old_img,
            transition_type,
            dimensions: (100, 10),
            duration: 2.0,
            step: 100,
            fps: Duration::from_nanos(1),
            angle: 0.0,
            pos: Position::new(Coord::Percent(0.0), Coord::Percent(0.0)),
            bezier: BezierCurve::from(Vector2 { x: 1.0, y: 0.0 }, Vector2 { x: 0.0, y: 1.0 }),
            wave: (20.0, 20.0),
        }
    }

fn dummy_outputs() -> Vec<String> {
        vec!["dummy".to_string()]
    }

#[test]
    fn transitions_should_end_with_equal_vectors() {
        use TransitionType as TT;
        let transitions = [TT::Simple, TT::Wipe, TT::Outer, TT::Grow, TT::Wave];
        for transition in transitions {
            let ((fr_send, fr_recv), (_stop_send, stop_recv)) = make_senders_and_receivers();
            let (old_img, new_img) = make_test_boxes();
            let mut transition_img = old_img.clone();
            let t = test_transition(old_img, transition.clone());
            let mut dummies = dummy_outputs();

let handle = {
                let new_img = new_img.clone();
                std::thread::spawn(move || t.execute(&new_img, &mut dummies, &fr_send, &stop_recv))
            };

while let Ok((_, i)) = fr_recv.recv() {
                i.unpack(&mut transition_img);
            }

assert!(handle.join().is_ok());
            for (tpix, npix) in transition_img.chunks_exact(4).zip(new_img.chunks_exact(4)) {
                assert_eq!(
                    tpix[0..3],
                    npix[0..3],
                    "Transition {transition:?} did not end with correct new_img"
                );
            }
        }
    }
}
0707010000000E000081A400000000000000000000000163EF979300002738000000000000000000000000000000000000002700000000swww-0.7.2/daemon/src/processor/mod.rsuse log::{debug, error, info};

use smithay_client_toolkit::reexports::calloop::channel::SyncSender;

use std::{
    path::PathBuf,
    sync::mpsc,
    sync::{Arc, RwLock},
    thread,
    time::Duration,
};

use utils::{
    communication::{Animation, Answer, BgInfo, Img},
    comp_decomp::ReadiedPack,
};

mod animations;
mod sync_barrier;

///The default thread stack size of 2MiB is way too overkill for our purposes
const TSTACK_SIZE: usize = 1 << 17; //128KiB

pub type ImgWithDim = (Box<[u8]>, (u32, u32));

pub struct Processor {
    frame_sender: SyncSender<(Vec<String>, ReadiedPack)>,
    anim_stoppers: Vec<mpsc::Sender<Vec<String>>>,
    on_going_transitions: Arc<RwLock<Vec<String>>>,
    sync_barrier: Arc<sync_barrier::SyncBarrier>,
}

impl Processor {
    pub fn new(frame_sender: SyncSender<(Vec<String>, ReadiedPack)>) -> Self {
        Self {
            frame_sender,
            anim_stoppers: Vec::new(),
            on_going_transitions: Arc::new(RwLock::new(Vec::new())),
            sync_barrier: Arc::new(sync_barrier::SyncBarrier::new(0)),
        }
    }

pub fn set_output_count(&mut self, outputs_count: u8) {
        self.sync_barrier.set_goal(outputs_count);
    }

pub fn transition(
        &mut self,
        transition: &utils::communication::Transition,
        requests: Vec<(Img, Vec<String>)>,
        old_imgs: Vec<ImgWithDim>,
    ) -> Answer {
        let mut answer = Answer::Ok;
        for ((old_img, dim), (new_img, mut outputs)) in old_imgs.into_iter().zip(requests) {
            self.stop_animations(&outputs);
            let transition = transition.clone();
            let sender = self.frame_sender.clone();
            let (stopper, stop_recv) = mpsc::channel();
            self.anim_stoppers.push(stopper);
            let on_going_transitions = Arc::clone(&self.on_going_transitions);
            if let Err(e) = thread::Builder::new()
                .name("transition".to_string()) //Name our threads  for better log messages
                .stack_size(TSTACK_SIZE) //the default of 2MB is way too overkill for this
                .spawn(move || {
                    on_going_transitions
                        .write()
                        .unwrap()
                        .extend_from_slice(&outputs);
                    animations::Transition::new(old_img, dim, transition).execute(
                        &new_img.img,
                        &mut outputs,
                        &sender,
                        &stop_recv,
                    );
                    on_going_transitions
                        .write()
                        .unwrap()
                        .retain(|output| !outputs.contains(output));
                })
            {
                answer = Answer::Err(format!("failed to spawn transition thread: {e}"));
                error!("failed to spawn 'transition' thread: {}", e);
            };
        }
        answer
    }

pub fn animate(
        &mut self,
        animation: utils::communication::Animation,
        mut outputs: Vec<String>,
        output_size: usize,
    ) -> Answer {
        let mut answer = Answer::Ok;

let sender = self.frame_sender.clone();
        let (stopper, stop_recv) = mpsc::channel();
        let on_going_transitions = Arc::clone(&self.on_going_transitions);

let barrier = Arc::clone(&self.sync_barrier);
        self.anim_stoppers.push(stopper);
        if let Err(e) = thread::Builder::new()
            .name("animation".to_string()) //Name our threads  for better log messages
            .stack_size(TSTACK_SIZE) //the default of 2MB is way too overkill for this
            .spawn(move || {
                while on_going_transitions
                    .read()
                    .unwrap()
                    .iter()
                    .any(|output| outputs.contains(output))
                {
                    std::thread::yield_now();
                }
                let mut now = std::time::Instant::now();
                /* We only need to animate if we have > 1 frame */
                if animation.animation.len() == 1 {
                    return;
                }
                for (frame, duration) in animation.animation.iter().cycle() {
                    let frame = frame.ready(output_size);

if animation.sync {
                        barrier.inc_and_wait_while(*duration, || match stop_recv.try_recv() {
                            Ok(to_remove) => {
                                outputs.retain(|o| !to_remove.contains(o));
                                outputs.is_empty() || to_remove.is_empty()
                            }
                            Err(mpsc::TryRecvError::Empty) => false,
                            Err(mpsc::TryRecvError::Disconnected) => true,
                        });
                        if outputs.is_empty() {
                            return;
                        }
                    }

answer
    }

pub fn stop_animations(&mut self, to_stop: &[String]) {
        self.on_going_transitions
            .write()
            .unwrap()
            .retain(|output| !to_stop.contains(output));
        self.anim_stoppers
            .retain(|a| a.send(to_stop.to_vec()).is_ok());
    }

#[must_use]
    pub fn import_cached_img(&mut self, info: BgInfo, old_img: &mut [u8]) -> Option<PathBuf> {
        if let Some((Img { img, path }, anim)) = get_cached_bg(&info.name) {
            let output_size = old_img.len();
            if output_size < img.len() {
                info!(
                    "{} monitor's buffer size ({output_size}) is smaller than cache's image ({})",
                    info.name,
                    img.len()
                );
                return None;
            }
            let pack = ReadiedPack::new(old_img, &img, |cur, goal, _| {
                *cur = *goal;
            });

return Some(path);
        }
        info!("failed to find cached image for monitor '{}'", info.name);
        None
    }
}

impl Drop for Processor {
    //We need to make sure pending animators exited
    fn drop(&mut self) {
        while !self.anim_stoppers.is_empty() {
            self.stop_animations(&Vec::new());
        }
    }
}

///Returns whether the calling function should exit or not
fn send_frame(
    frame: ReadiedPack,
    outputs: &mut Vec<String>,
    timeout: Duration,
    sender: &SyncSender<(Vec<String>, ReadiedPack)>,
    stop_recv: &mpsc::Receiver<Vec<String>>,
) -> bool {
    match stop_recv.recv_timeout(timeout) {
        Ok(to_remove) => {
            outputs.retain(|o| !to_remove.contains(o));
            if outputs.is_empty() || to_remove.is_empty() {
                return true;
            }
        }
        Err(mpsc::RecvTimeoutError::Timeout) => (),
        Err(mpsc::RecvTimeoutError::Disconnected) => return true,
    }
    match sender.send((outputs.clone(), frame)) {
        Ok(()) => false,
        Err(_) => true,
    }
}

fn get_cached_bg(output: &str) -> Option<(Img, Option<Animation>)> {
    let cache_path = match utils::communication::get_cache_path() {
        Ok(mut path) => {
            path.push(output);
            path
        }
        Err(e) => {
            error!("failed to get bgs cache's path: {e}");
            return None;
        }
    };

let mut reader = std::io::BufReader::new(cache_file);
    match Img::try_from(&mut reader) {
        Ok(img) => match Animation::try_from(&mut reader) {
            Ok(anim) => Some((img, Some(anim))),
            Err(_) => Some((img, None)),
        },
        Err(e) => {
            error!("failed to read bgs cache's file: {e}");
            None
        }
    }
}
0707010000000F000081A400000000000000000000000163EF9793000004D9000000000000000000000000000000000000003000000000swww-0.7.2/daemon/src/processor/sync_barrier.rsuse std::{
    sync::{Condvar, Mutex, RwLock},
    time::Duration,
};

///This is a barrier that lets us dynamically set the amount of threads that have to wait. We use
///this in order to sync the animations, because outputs may be created or deleted during runtime
pub struct SyncBarrier {
    goal: RwLock<u8>,
    cur: Mutex<u8>,
    condvar: Condvar,
}

impl SyncBarrier {
    pub fn new(goal: u8) -> Self {
        Self {
            goal: RwLock::new(goal),
            cur: Mutex::new(0),
            condvar: Condvar::new(),
        }
    }

pub fn set_goal(&self, new_goal: u8) {
        let mut goal = self.goal.write().unwrap();
        *goal = new_goal;
    }

pub fn inc_and_wait_while<F>(&self, timeout: Duration, mut f: F)
    where
        F: FnMut() -> bool,
    {
        let mut cur = self.cur.lock().unwrap();
        let goal = self.goal.read().unwrap();

*cur += 1;
        if *cur != *goal {
            drop(goal);
            while *cur != 0 {
                if f() {
                    return;
                }
                cur = self.condvar.wait_timeout(cur, timeout).unwrap().0;
            }
        } else {
            *cur = 0;
            self.condvar.notify_all();
        }
    }
}
07070100000010000081A400000000000000000000000163EF9793000008F3000000000000000000000000000000000000002100000000swww-0.7.2/daemon/src/wayland.rs//use log::{debug, error, info, warn};
use smithay_client_toolkit::{
    environment::{Environment, SimpleGlobal},
    output::{OutputHandler, XdgOutputHandler},
    reexports::{
        client::{
            protocol::{wl_compositor, wl_output, wl_shm},
            Display, EventQueue,
        },
        protocols::{
            unstable::xdg_output::v1::client::zxdg_output_manager_v1,
            wlr::unstable::layer_shell::v1::client::zwlr_layer_shell_v1,
        },
    },
    shm::ShmHandler,
};

pub struct Env {
    compositor: SimpleGlobal<wl_compositor::WlCompositor>,
    shm: ShmHandler,
    outputs: OutputHandler,
    xdg_out: XdgOutputHandler,
    layer_shell: SimpleGlobal<zwlr_layer_shell_v1::ZwlrLayerShellV1>,
}

smithay_client_toolkit::environment!(Env,
singles = [
    wl_compositor::WlCompositor => compositor,
    zwlr_layer_shell_v1::ZwlrLayerShellV1 => layer_shell,
    wl_shm::WlShm => shm,
    zxdg_output_manager_v1::ZxdgOutputManagerV1 => xdg_out
],
multis = [
    wl_output::WlOutput => outputs,
]);

impl ::smithay_client_toolkit::output::OutputHandling for Env {
    fn listen<F>(&mut self, f: F) -> ::smithay_client_toolkit::output::OutputStatusListener
    where
        F: FnMut(
                ::smithay_client_toolkit::reexports::client::protocol::wl_output::WlOutput,
                &::smithay_client_toolkit::output::OutputInfo,
                ::smithay_client_toolkit::reexports::client::DispatchData,
            ) + 'static,
    {
        self.outputs.listen(f)
    }
}

pub fn make_wayland_environment() -> (Environment<Env>, Display, EventQueue) {
    let display = Display::connect_to_env().expect("Failed to connect to wayland environment");
    let mut event_queue = display.create_event_queue();
    let queue_token = event_queue.token();
    let attached_display = display.attach(queue_token);

let (outputs, xdg_out) = XdgOutputHandler::new_output_handlers();
    let env = Environment::new(
        &attached_display,
        &mut event_queue,
        Env {
            compositor: SimpleGlobal::new(),
            shm: ShmHandler::new(),
            layer_shell: SimpleGlobal::new(),
            xdg_out,
            outputs,
        },
    )
    .expect("Couldn't create wayland environment");
    (env, display, event_queue)
}
07070100000011000041ED00000000000000000000000263EF979300000000000000000000000000000000000000000000000F00000000swww-0.7.2/doc07070100000012000081A400000000000000000000000163EF97930000000B000000000000000000000000000000000000001A00000000swww-0.7.2/doc/.gitignoregenerated/
07070100000013000081ED00000000000000000000000163EF9793000002A2000000000000000000000000000000000000001600000000swww-0.7.2/doc/gen.sh#!/bin/sh

# This script generates man pages in a `doc/generated` directory. In order to
# install these, you need to move the man pages to the appropriate location in
# your system. You should be able to figure out the correct directories by
# running `manpath`.
#
# Package Maintainers: please consult your distribution's specific documentation
# to adapt to whatever idiosyncrasies it may have.

set -e

DIR=$(dirname "$0")
GEN_DIR="$DIR"/generated

if [ ! -d "$GEN_DIR" ]; then
	mkdir -v "$GEN_DIR"
fi

for FILE in "$DIR"/*scd; do
	GEN="$GEN_DIR"/"$(basename --suffix .scd "$FILE")"
	printf "generating %s..." "$GEN"
	scdoc < "$FILE" > "$GEN"
	printf " ...done!\n"
done
07070100000014000081A400000000000000000000000163EF9793000002DC000000000000000000000000000000000000002000000000swww-0.7.2/doc/swww-clear.1.scdswww-clear(1)

# NAME
swww-clear

# SYNOPSIS
*swww clear* [OPTIONS] <COLOR>

# OPTIONS

*-o*, *--outputs*
	Comma separated list of outputs to display the image at. Use *swww query* to
	know which outputs are currently being used.

If it isn't set, the image is displayed on all outputs.

*-h*, *--help*
	Print help (see a summary with '-h')

# COLOR

The color to fill the screen with. It must be given in *RRGGBB*, hex format. Note
there is no prepended '#'. Defaults to *000000*.

# DESCRIPTION
Fills the specified outputs with the given color.

Currently, we *do not* cache this, so if you want a color to be set at
initialization, you must set it every time:

```
swww init && swww clear 1a804a
```

# SEE ALSO
*swww-query*(1)
07070100000015000081A400000000000000000000000163EF9793000003CE000000000000000000000000000000000000002100000000swww-0.7.2/doc/swww-daemon.1.scdswww-daemon(1)

# NAME
swww-daemon

# DESCRIPTION

The *swww-daemon* will run continuously, waiting for commands in
_$XDG_RUNTIME_DIR/swww.socket_(or _/tmp/swww/swww.socket_, if $XDG_RUNTIME_DIR
is not set). The daemon will take care of both creating and deleting that file
when it is initialized or killed.

*There is no reason for you to run the swww-daemon manually*. The daemon should
be started through *swww init* and killed through *swww kill*. Running the
daemon manually would only help for debugging, or developing *swww*. *swww init*
has the benefits that it checks to see if another instance is already running,
and it waits for the daemon to be ready, so something like

```
swww init && swww img bg.png
```

works, but

```
swww-daemon &
swww img bg.png
```

*can potentially fail*, because the daemon might still not be ready by the time
the client sends the image.

Bottom line is: just use *swww init* to initialize the daemon.

# SEE ALSO
*swww-init*(1)
07070100000016000081A400000000000000000000000163EF9793000018F0000000000000000000000000000000000000001E00000000swww-0.7.2/doc/swww-img.1.scdswww-img(1)

# NAME
swww-img

# SYNOPSIS
*swww img* [OPTIONS] <path/to/img>

# OPTIONS

*-f*, *--filter* <FILTER>
	Filter to use when scaling images

Available options are:

_Nearest_ | _Bilinear_ | _CatmullRom_ | _Mitchell_ | _Lanczos3_

These are offered by the fast_image_resize crate
	(https://docs.rs/fast_image_resize/2.5.0/fast_image_resize/). _Nearest_ is
	what I recommend for pixel art stuff, and ONLY for pixel art stuff. It is
	also the fastest filter.

For non pixel art stuff, I would usually recommend one of the last three,
	though some experimentation will be necessary to see which one you like
	best.

Note you can also pass the flag *--no-resize*, explained below. In which
	case the *--filter* flag will have no effect.

Default is Lanczos3.

*--no-resize*
	Do not resize the image.

If this is set, the image won't be resized, and will be centralized in the
	middle of the screen instead. If it is smaller than the screen's size, it
	will be padded with the value of *--fill_color*, below.

*--fill-color* <RRGGBB>
	Which color to fill the padding with when not resizing.

Default is _000000_.

*-o*, *--outputs*
	Comma separated list of outputs to display the image at. Use *swww query* to
	know which outputs are currently being used.

If it isn't set, the image is displayed on all outputs.

*-t*, *--transition-type* <TRANSITION_TYPE>
	\[Environment Variable $SWWW_TRANSITION]

Sets the type of transition. Default is _simple_, that fades into the new
	image.

Possible transitions are:

[- _simple_
:- _left_
:- _right_
:- _top_
:- _bottom_
:- _wipe_
:- _wave_
:- _grow_
:- _center_
:- _any_
:- _outer_
:- _random_

The _left_, _right_, _top_ and _bottom_ options make the transition	happen
	from that position to its opposite in the screen.

_wipe_ is similar to _left_ but allows you to specify the angle for
	transition with the `--transition-angle` flag.

_wave_ is similar to _wipe_ but the sweeping line is wavy. You can control
	the "waviness" with `--transition-wave`.

_grow_ causes a growing circle to transition across the screen and allows
	changing the circle's center position with the `--transition-pos` flag.

_center_ is an alias to _grow_ with position set to center of screen.

_any_ is an alias to _grow_ with position set to a random point on screen.

_outer_ is the same as grow but the circle shrinks instead of growing.

Finally, _random_ will select a transition effect at random

*--transition-step* <0-255>
	\[Environment Variable $SWWW_TRANSITION_STEP]

How fast the transition approaches the new image.

The transition logic works by adding or subtracting from the current rgb
	values until the old image transforms in the new one. This controls by how
	much we add or subtract.

For example, if pixel A is 000010, and we need it to transition to pixel B,
	which is 000020, if *transition-step* is 2, then in one frame pixel A will
	turn to 000012, in the next frame to 000014, and so on.

Larger values will make the transition faster, but more abrupt. A value of
	255 will always switch to the new image immediately.

Default is 90.

*--transition-duration* <seconds (can have decimals)>
	\[Environment Variable $SWWW_TRANSITION_DURATION]

How long the transition takes to complete, in seconds.

Note this doesn't work with the _simple_ transition.

Default is 3.

*--transition-fps* <frames per second (max 255)>
	\[Environment Variable: $SWWW_TRANSITION_FPS]

Frame rate for the transition effect.

Note there is no point in setting this to a value smaller than what your
	monitor supports.

Also note this is **different** from the transition-step. That one controls
	by how much we approach the new image every frame.

Default is 30.

*--transition-angle* <angle, in degrees (parsed as a float)>
	\[Environment Variable: SWWW_TRANSITION_ANGLE]

This is used for the _wipe_ and _wave_ transitions. It controls the angle of
	the wipe.

Note that the angle is in degrees, where '0' is right to left and '90'
	is top to bottom, and '270' bottom to top

Default is 45.

*--transition-pos* <x,y>
	\[Environment Variable: SWWW_TRANSITION_POS]

This is only used for the _grow_ and _outer_ transitions. It controls the
	center of circle (default is _center_).

Position values can be given in both percentage values and pixel values:
	float values are interpreted as percentages and integer values as pixel
	values. Eg.: 0.5,0.5 means 50% of the screen width and 50% of the screen
	height, while 200,400 means 200 pixels from the left and 400 pixels from the
	bottom.

The value can also be an alias which will set the position accordingly:
[- _center_
:- _top_
:- _left_
:- _right_
:- _bottom_
:- _top-left_
:- _top-right_
:- _bottom-left_
:- _bottom-right_

Default is _center_.

*--transition-bezier* <f1,f2,f3,f4 (all floats)>
	\[Environment Variable: SWWW_TRANSITION_BEZIER]

Bezier curve to use for the transition animation. https://cubic-bezier.com
	is a good website to get these values from.

eg: 0.0,0.0,1.0,1.0 for linear animation

Default is .54,0,.34,.99

*--transition-wave* <width,height (both floats)>
	\[Environment Variable: SWWW_TRANSITION_WAVE]

Currently only used for _wave_ transition to control the width and height of
	each wave.

Default is : 20,20

*--sync*
	Sync the animations' frames between the monitors.

Activating this will cause a monitor's animation to wait until all other
	monitor's are ready to update, and then update them all at once. Note if you
	want to send different `gif`s to different monitors and have them synced,
	you will have to call `swww img --sync` *every time*.

Furthermore, if you only set `--sync` to one monitor and not the others,
	that monitor will not animate anything, while the others will animate
	out-of-sync.

Finally, note this only applies to `gif` animations, not the transitions.

*-h*, *--help*
	Print help (see a summary with '-h')

# DESCRIPTION
Sends an image (or animated gif) for the daemon to display. You can also use `-`
to read from stdin instead.

The images sent will be cached at _$XDG_CACHE_HOME/swww_ or _$HOME/.cache/swww_
if $XDG_CACHE_HOME does not exist. For each monitor, there will be a file in
those locations corresponding to the current image/animation being displayed.
Next time you run *swww init*, the *swww-daemon* will load those files.

# SEE ALSO
*swww-daemon*(1) *swww-query*(1)
07070100000017000081A400000000000000000000000163EF9793000002B0000000000000000000000000000000000000001F00000000swww-0.7.2/doc/swww-init.1.scdswww-init(1)

# NAME
swww-init

# SYNOPSIS
*swww init* [--no-daemon]

# OPTIONS

*--no-daemon*
	Don't fork the daemon. This will keep it running in the current terminal.

The only reason to do this would be to see the daemon's logs. Note that for
	release builds we only log info, warnings and errors, so you won't be seeing
	much (ideally). This is mostly useful for debugging and developing.

*-h*, *--help*
	Print help (see a summary with '-h')

# DESCRIPTION

Initializes the daemon. This is the recommended way of doing it, since we make
sure to check if another instance is already running, and wait until the daemon
is 100% ready to receive requests.

# SEE ALSO
*swww-daemon*(1)
07070100000018000081A400000000000000000000000163EF97930000022B000000000000000000000000000000000000001F00000000swww-0.7.2/doc/swww-kill.1.scdswww-kill(1)

# NAME
swww-kill

# SYNOPSIS
*swww kill*

# OPTIONS

*-h*, *--help*
	Print help (see a summary with '-h')

# DESCRIPTION

Kills the daemon. This is the recommended way of doing it, since we wait to make
sure the socket file was deleted, thus confirming the daemon exited.

Note that sending SIGTERM to the daemon would work correctly, but sending
SIGKILL would make daemon leave behind the socket file. This is not a big
problem; it would only cause a warning to be printed next time the daemon is
initialized.

# SEE ALSO
*swww-daemon*(1)
07070100000019000081A400000000000000000000000163EF9793000002E9000000000000000000000000000000000000002000000000swww-0.7.2/doc/swww-query.1.scdswww-query(1)

# NAME
swww-query

# SYNOPSIS
*swww query*

# OPTIONS

*-h*, *--help*
	Print help (see a summary with '-h')

# DESCRIPTION

Asks the daemon to print output information (names and dimensions).

You may use this to find out valid values for the <swww-img --outputs> option. If
you want more detailed information about your outputs, I would recommend trying
something like *wlr-randr*.

# OUTPUT FORMAT

Currently, *swww query* prints information in the following format:

```
OUTPUT: SIZE, scale: SCALE, currentlu displaying: IMAGE_OR_COLOR
```

where *SIZE* is in the format *WxH* (eg.: *1920x1080*), *SCALE* in "scale:
NUMBER", and *IMAGE_OR_COLOR* in
	- "image: IMAGENAME", if it's an image; or
	- "color: RGB", if it's a color
0707010000001A000081A400000000000000000000000163EF979300000654000000000000000000000000000000000000001A00000000swww-0.7.2/doc/swww.1.scdswww(1)

# NAME
swww - A Solution to your Wayland Wallpaper Woes

# SYNOPSIS
*swww* <COMMAND>

# COMMANDS

*clear*
	Fills the specified outputs with the given color

*img*
	Sends an image (or animated gif) for the daemon to display

*init*
	Initializes the daemon

*kill*
	Kills the daemon

*query*
	Asks the daemon to print output information (names and dimensions)

*help [COMMAND]*
	Print help or the help of the given command

# OPTIONS

*-h*, *--help*
	Print help (see a summary with '-h')

*-V*, *--version*
	Print  version

# DESCRIPTION
*swww* is a wallpaper manager that lets you change what your monitors display as
a background by controlling the *swww-daemon* at runtime.

It supports animated gifs and putting different stuff in different monitors. I
also did my best to make it as resource efficient as possible.

To start, begin by running *swww init*. That will set up the *swww-daemon*.
Then, you can send images to be displayed with *swww img*. To kill the daemon,
use *swww kill*.

*Note that swww only works in a compositor that implements the layer-shell
protocol*. Typically, _wlr-roots_ based compositors.

# FILES
*swww* will create the following files in your system:
	- A socket in _$XDG_RUNTIME_DIR/swww.socket_ or _/tmp/swww/swww.socket_, if
	  $XDG_RUNTIME_DIR does not exist.
	- Cache files in _$XDG_CACHE_HOME/swww_ or _$HOME/.cache/swww_ if
	  $XDG_CACHE_HOME does not exist. These are used to set the wallpaper to the
	  previous image when a monitor is (re)connected or turned on.

# SEE ALSO
*swww-daemon*(1) *swww-clear*(1) *swww-img*(1) *swww-init*(1) *swww-kill*(1)
*swww-query*(1)
0707010000001B000041ED00000000000000000000000263EF979300000000000000000000000000000000000000000000001B00000000swww-0.7.2/example_scripts0707010000001C000081A400000000000000000000000163EF9793000001C0000000000000000000000000000000000000002500000000swww-0.7.2/example_scripts/README.mdIn here you will find example scripts to help you get started writting your own
scripts to work with `swww` for various effects. Currently, there are scripts
for:

* Randomly going thorugh the images in a directory (swww_randomize.sh)
  * Changing with which image `swww` is initialized according to the time of day
  (swww_init_according_to_time_of_day.sh)
  * Scheduling changes to the wallpaper at different times of day
  (swww_scheduler.sh)
0707010000001D000081ED00000000000000000000000163EF9793000003CC000000000000000000000000000000000000004100000000swww-0.7.2/example_scripts/swww_init_according_to_time_of_day.sh#!/bin/sh

# This allows you to control which image to init the daemon with according
# to the time of day. You may change the match cases as you see fit.
# This currently only takes hours into account, but it should be easy to
# modify to also use minutes, or days of the week, if you want.
#
# Use it simply by calling this script instead of swww init

case $(date +%H) in
	00 | 01 | 02 | 03 | 04 | 05 | 06 | 07) # First 8 hours of the day
		# Uncomment bellow to setup the image you wish to display as your
		# wallpaper if you run this scritp during the first 8 hours of the
		# day

# swww init && swww img path/to/img
		;;
	08 | 09 | 10 | 11 | 12 | 13 | 14 | 15) # Middle 8 hours of the day
		# Same as above, but for the middle 8 hours of the day

# swww init && swww img path/to/img
		;;
	16 | 17 | 18 | 19 | 20 | 21 | 22 | 23) # Final 8 hours of the day
		# Same as above, but for the final 8 hours of the day

# swww init && swww img path/to/img
		;;
esac
0707010000001E000081ED00000000000000000000000163EF9793000002DA000000000000000000000000000000000000002D00000000swww-0.7.2/example_scripts/swww_randomize.sh#!/bin/bash

# This script will randomly go through the files of a directory, setting it
# up as the wallpaper at regular intervals
#
# NOTE: this script is in bash (not posix shell), because the RANDOM variable
# we use is not defined in posix

if [[ $# -lt 1 ]] || [[ ! -d $1   ]]; then
	echo "Usage:
	$0 <dir containg images>"
	exit 1
fi

# Edit bellow to control the images transition
export SWWW_TRANSITION_FPS=60
export SWWW_TRANSITION_STEP=2

# This controls (in seconds) when to switch to the next image
INTERVAL=300

while true; do
	find "$1" \
		| while read -r img; do
			echo "$((RANDOM % 1000)):$img"
		done \
		| sort -n | cut -d':' -f2- \
		| while read -r img; do
			swww img "$img"
			sleep $INTERVAL
		done
done
0707010000001F000081ED00000000000000000000000163EF9793000003BF000000000000000000000000000000000000002D00000000swww-0.7.2/example_scripts/swww_scheduler.sh#!/bin/sh

# This is a script to help you schedule image switching at different times of
# the day. You may use it as-is or as inspiration for something else

if [ $# -lt 2 ]; then
	echo "Usage:
	$0 <path/to/img [optional arguments to pass to swww]> <time in HH:MM format>

This will use the 'at' command to schedule the image switch.
You can control the transition fps or step by passing the respective options:

$0 'path/to/img --transition-fps 60 --transition-step 5' '18:00'
"
	exit 1
fi

if ! type "at" > /dev/null 2>&1; then
	echo "ERROR: 'at' command doesn't exist!"
	exit 1
fi

echo "swww img $1" | at "$2"

# NOTE: the above line is really the only one that matters, so if you are
# making a script and want to schedule a bunch of things at once, I recommend
# creating a function, like:
#
# swww_schedule() {
#     echo "swww img $1" | at "$2"
# }
#
# Then, you can simply call:
#     swww_schedule <path/to/img> <HH:MM>
# as many time as you need
07070100000020000041ED00000000000000000000000263EF979300000000000000000000000000000000000000000000000F00000000swww-0.7.2/src07070100000021000081A400000000000000000000000163EF979300003D93000000000000000000000000000000000000001600000000swww-0.7.2/src/cli.rs/// Note: this file only has basic declarations and some definitions in order to be possible to
/// import it in the build script, to automate shell completion
use clap::Parser;
use std::path::PathBuf;

fn from_hex(hex: &str) -> Result<[u8; 3], String> {
    let chars = hex
        .chars()
        .filter(|&c| c.is_ascii_alphanumeric())
        .map(|c| c.to_ascii_uppercase() as u8);

if chars.clone().count() != 6 {
        return Err(format!(
            "expected 6 characters, found {}",
            chars.clone().count()
        ));
    }

let mut color = [0, 0, 0];

for (i, c) in chars.enumerate() {
        match c {
            b'A'..=b'F' => color[i / 2] += c - b'A' + 10,
            b'0'..=b'9' => color[i / 2] += c - b'0',
            _ => {
                return Err(format!(
                    "expected [0-9], [a-f], or [A-F], found '{}'",
                    char::from(c)
                ))
            }
        }
        if i % 2 == 0 {
            color[i / 2] *= 16;
        }
    }
    Ok(color)
}

#[derive(Clone)]
pub enum Filter {
    Nearest,
    Bilinear,
    CatmullRom,
    Mitchell,
    Lanczos3,
}

impl std::str::FromStr for Filter {
    type Err = &'static str;

fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "Nearest" => Ok(Self::Nearest),
            "Bilinear" => Ok(Self::Bilinear),
            "CatmullRom" => Ok(Self::CatmullRom),
            "Mitchell" => Ok(Self::Mitchell),
            "Lanczos3" => Ok(Self::Lanczos3),
            _ => Err("unrecognized filter. Valid filters are:\
                     Nearest | Bilinear | CatmullRom | Mitchell | Lanczos3\
                     see swww img --help for more details"),
        }
    }
}

#[derive(Clone)]
pub enum TransitionType {
    Simple,
    Left,
    Right,
    Top,
    Bottom,
    Center,
    Outer,
    Any,
    Random,
    Wipe,
    Wave,
    Grow,
}

impl std::str::FromStr for TransitionType {
    type Err = &'static str;

fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "simple" => Ok(Self::Simple),
            "left" => Ok(Self::Left),
            "right" => Ok(Self::Right),
            "top" => Ok(Self::Top),
            "bottom" => Ok(Self::Bottom),
            "wipe" => Ok(Self::Wipe),
            "grow" => Ok(Self::Grow),
            "center" => Ok(Self::Center),
            "outer" => Ok(Self::Outer),
            "any" => Ok(Self::Any),
            "wave" => Ok(Self::Wave),
            "random" => Ok(Self::Random),
            _ => Err("unrecognized transition type.\nValid transitions are:\n\
                     \tsimple | left | right | top | bottom | wipe | grow | center | outer | random | wave\n\
                     see swww img --help for more details"),
        }
    }
}

#[derive(Clone)]
pub enum CliCoord {
    Percent(f32),
    Pixel(f32),
}

#[derive(Clone)]
pub struct CliPosition {
    pub x: CliCoord,
    pub y: CliCoord,
    //Unknown(f32, f32),
}

impl CliPosition {
    pub fn new(x: CliCoord, y: CliCoord) -> Self {
        Self { x, y }
    }
}

#[derive(Parser)]
#[command(version, name = "swww")]
///A Solution to your Wayland Wallpaper Woes
///
///Change what your monitors display as a background by controlling the swww daemon at runtime.
///Supports animated gifs and putting different stuff in different monitors. I also did my best to
///make it as resource efficient as possible.
///
///Note `swww` will only work in a compositor that implements the layer-shell protocol. Typically,
///wlr-roots based compositors.
pub enum Swww {
    ///Fills the specified outputs with the given color.
    ///
    ///Defaults to filling all outputs with black.
    Clear(Clear),

/// Sends an image (or animated gif) for the daemon to display.
    ///
    /// Use `-` to read from stdin
    Img(Img),

/// Initializes the daemon.
    ///
    /// Exits if there is already a daemon running. We check that by seeing if
    /// $XDG_RUNTIME_DIR/swww.socket exists.
    Init {
        ///Don't fork the daemon. This will keep it running in the current terminal.
        ///
        ///The only advantage of this would be seeing the logging real time. Note that for release
        ///builds we only log info, warnings and errors, so you won't be seeing much (ideally).
        #[clap(long)]
        no_daemon: bool,
    },

///Kills the daemon
    Kill,

///Asks the daemon to print output information (names and dimensions).
    ///
    ///You may use this to find out valid values for the <swww-img --outputs> option. If you want
    ///more detailed information about your outputs, I would recommend trying wlr-randr.
    Query,
}

#[derive(Parser)]
pub struct Clear {
    /// Color to fill the screen with.
    ///
    /// Must be given in rrggbb format (note there is no prepended '#').
    #[arg(value_parser = from_hex, default_value = "000000")]
    pub color: [u8; 3],

/// Comma separated list of outputs to display the image at.
    ///
    /// If it isn't set, the image is displayed on all outputs.
    #[clap(short, long, default_value = "")]
    pub outputs: String,
}

#[derive(Parser)]
pub struct Img {
    /// Path to the image to display
    pub path: PathBuf,

/// Comma separated list of outputs to display the image at.
    ///
    /// If it isn't set, the image is displayed on all outputs.
    #[arg(short, long, default_value = "")]
    pub outputs: String,

/// Do not resize the image
    ///
    /// If this is set, the image won't be resized, and will be centralized in the middle of the
    /// screen instead. If it is smaller than the screen's size, it will be padded with the value
    /// of `fill_color`, below.
    #[arg(long)]
    pub no_resize: bool,

/// Which color to fill the padding with when not resizing
    #[arg(value_parser = from_hex, long, default_value = "000000")]
    pub fill_color: [u8; 3],

///Filter to use when scaling images (run swww img --help to see options).
    ///
    ///Available options are:
    ///
    ///Nearest | Bilinear | CatmullRom | Mitchell | Lanczos3
    ///
    ///These are offered by the fast_image_resize crate
    ///(https://docs.rs/fast_image_resize/2.5.0/fast_image_resize/). 'Nearest' is
    ///what I recommend for pixel art stuff, and ONLY for pixel art stuff. It is also the
    ///fastest filter.
    ///
    ///For non pixel art stuff, I would usually recommend one of the last three, though some
    ///experimentation will be necessary to see which one you like best. Also note they are
    ///all slower than Nearest.
    #[arg(short, long, default_value = "Lanczos3")]
    pub filter: Filter,

///Sync the animations' frames between the monitors
    ///
    ///Activating this will cause a monitor's animation to wait until all other monitor's are
    ///ready to update, and then update them all at once. Note if you want to send different `gif`s
    ///to different monitors and have them synced, you will have to call `swww img --sync` **every
    ///time**. 
    ///
    ///Furthermore, if you only set `--sync` to one monitor and not the others, that monitor will
    ///not animate anything, while the others will animate out-of-sync.
    ///
    ///Finally, note this only applies to `gif` animations, not the transitions.
    #[arg(long, default_value = "false")]
    pub sync: bool,

///Sets the type of transition. Default is 'simple', that fades into the new image
    ///
    ///Possible transitions are:
    ///
    ///simple | left | right | top | bottom | wipe | wave | grow | center | any | outer | random
    ///
    ///The 'left', 'right', 'top' and 'bottom' options make the transition happen from that
    ///position to its opposite in the screen.
    ///
    ///'wipe' is similar to 'left' but allows you to specify the angle for transition with the `--transition-angle` flag.
    ///
    ///'wave' is similar to 'wipe' sweeping line is wavy
    ///
    ///'grow' causes a growing circle to transition across the screen and allows changing the circle's center
    /// position with the `--transition-pos` flag.
    ///
    ///'center' is an alias to 'grow' with position set to center of screen.
    ///
    ///'any' is an alias to 'grow' with position set to a random point on screen.
    ///
    ///'outer' is the same as grow but the circle shrinks instead of growing.
    ///
    ///Finally, 'random' will select a transition effect at random
    #[arg(short, long, env = "SWWW_TRANSITION", default_value = "simple")]
    pub transition_type: TransitionType,

///How fast the transition approaches the new image.
    ///
    ///The transition logic works by adding or subtracting from the current rgb values until the
    ///old image transforms in the new one. This controls by how much we add or subtract.
    ///
    ///Larger values will make the transition faster, but more abrupt. A value of 255 will always
    ///switch to the new image immediately.
    ///
    #[arg(long, env = "SWWW_TRANSITION_STEP", default_value = "90")]
    pub transition_step: u8,

///How long the transition takes to complete in seconds.
    ///
    ///Note that this doesn't work with the 'simple' transition
    #[arg(long, env = "SWWW_TRANSITION_DURATION", default_value = "3")]
    pub transition_duration: f32,

///Frame rate for the transition effect.
    ///
    ///Note there is no point in setting this to a value smaller than what your monitor supports.
    ///
    ///Also note this is **different** from the transition-step. That one controls by how much we
    ///approach the new image every frame.
    #[arg(long, env = "SWWW_TRANSITION_FPS", default_value = "30")]
    pub transition_fps: u8,

///This is used for the 'wipe' and 'wave' transitions. It controls the angle of the wipe
    ///
    ///Note that the angle is in degrees, where '0' is right to left and '90' is top to bottom, and '270' bottom to top
    #[arg(long, env = "SWWW_TRANSITION_ANGLE", default_value = "45")]
    pub transition_angle: f64,

///This is only used for the 'grow','outer' transitions. It controls the center of circle (default is 'center').
    ///
    ///Position values can be given in both percentage values and pixel values:
    ///  float values are interpreted as percentages and integer values as pixel values
    ///  eg: 0.5,0.5 means 50% of the screen width and 50% of the screen height
    ///      200,400 means 200 pixels from the left and 400 pixels from the bottom
    ///
    ///the value can also be an alias which will set the position accordingly):
    /// 'center' | 'top' | 'left' | 'right' | 'bottom' | 'top-left' | 'top-right' | 'bottom-left' | 'bottom-right'
    #[arg(long, env = "SWWW_TRANSITION_POS", default_value = "center", value_parser=parse_coords)]
    pub transition_pos: CliPosition,

///bezier curve to use for the transition
    ///https://cubic-bezier.com is a good website to get these values from
    ///
    ///eg: 0.0,0.0,1.0,1.0 for linear animation
    #[arg(long, env = "SWWW_TRANSITION_BEZIER", default_value = ".54,0,.34,.99", value_parser = parse_bezier)]
    pub transition_bezier: (f32, f32, f32, f32),

///currently only used for 'wave' transition to control the width and height of each wave
    #[arg(long, env = "SWWW_TRANSITION_WAVE", default_value = "20,20", value_parser = parse_wave)]
    pub transition_wave: (f32, f32),
}

fn parse_wave(raw: &str) -> Result<(f32, f32), String> {
    let mut iter = raw.split(',');
    let mut parse = || {
        iter.next()
            .ok_or_else(|| "Not enough values".to_string())
            .and_then(|s| s.parse::<f32>().map_err(|e| e.to_string()))
    };

let parsed = (parse()?, parse()?);
    Ok(parsed)
}

fn parse_bezier(raw: &str) -> Result<(f32, f32, f32, f32), String> {
    let mut iter = raw.split(',');
    let mut parse = || {
        iter.next()
            .ok_or_else(|| "Not enough values".to_string())
            .and_then(|s| s.parse::<f32>().map_err(|e| e.to_string()))
    };

let parsed = (parse()?, parse()?, parse()?, parse()?);
    if parsed == (0.0, 0.0, 0.0, 0.0) {
        return Err("Invalid bezier curve: 0,0,0,0 (try using 0,0,1,1 instead)".to_string());
    }
    Ok(parsed)
}

// parses Percents and numbers in format of "<coord1>,<coord2>"
fn parse_coords(raw: &str) -> Result<CliPosition, String> {
    let coords = raw.split(',').map(|s| s.trim()).collect::<Vec<&str>>();
    if coords.len() != 2 {
        match coords[0] {
            "center" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(0.5),
                    CliCoord::Percent(0.5)
                ));
            }
            "top" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(0.5),
                    CliCoord::Percent(1.0)
                ));
            }
            "bottom" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(0.5),
                    CliCoord::Percent(0.0)
                ));
            }
            "left" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(0.0),
                    CliCoord::Percent(0.5)
                ));
            }
            "right" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(1.0),
                    CliCoord::Percent(0.5)
                ));
            }
            "top-left" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(0.0),
                    CliCoord::Percent(1.0)
                ));
            }
            "top-right" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(1.0),
                    CliCoord::Percent(1.0)
                ));
            }
            "bottom-left" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(0.0),
                    CliCoord::Percent(0.0)
                ));
            }
            "bottom-right" => {
                return Ok(CliPosition::new(
                    CliCoord::Percent(1.0),
                    CliCoord::Percent(0.0)
                ));
            }
            _ => return Err(format!("Invalid position keyword: {raw}")),
        }
    }

let x = coords[0];
    let y = coords[1];

let parsed_x = match x.parse::<u32>() {
        Ok(x) => CliCoord::Pixel(x as f32),
        Err(_) => match x.parse::<f32>() {
            Ok(x) => CliCoord::Percent(x),
            Err(_) => return Err(format!("Invalid x coord: {x}")),
        },
    };

let parsed_y = match y.parse::<u32>() {
        Ok(y) => CliCoord::Pixel(y as f32),
        Err(_) => match y.parse::<f32>() {
            Ok(y) => CliCoord::Percent(y),
            Err(_) => return Err(format!("Invalid y coord: {y}")),
        },
    };

Ok(CliPosition::new(parsed_x, parsed_y))

}

#[cfg(test)]
mod tests {
    use super::*;

#[test]
    fn should_reject_wrong_colors() {
        assert!(
            from_hex("0012231").is_err(),
            "function is accepting strings with more than 6 chars"
        );
        assert!(
            from_hex("00122").is_err(),
            "function is accepting strings with less than 6 chars"
        );
        assert!(
            from_hex("00r223").is_err(),
            "function is accepting strings with chars that aren't hex"
        );
    }

#[test]
    fn should_convert_colors_from_hex() {
        let color = from_hex("101010").unwrap();
        assert_eq!(color, [16, 16, 16]);

let color = from_hex("ffffff").unwrap();
        assert_eq!(color, [255, 255, 255]);

use utils::{
    communication::{self, get_socket_path, AnimationRequest, Answer, Coord, Position, Request},
    comp_decomp::BitPack,
};

mod cli;
use cli::Swww;

fn main() -> Result<(), String> {
    let swww = Swww::parse();
    if let Swww::Init { no_daemon } = &swww {
        match is_daemon_running() {
            Ok(false) => {
                let socket_path = get_socket_path();
                if socket_path.exists() {
                    eprintln!(
                        "WARNING: socket file {} was not deleted when the previous daemon exited",
                        socket_path.to_string_lossy()
                    );
                    if let Err(e) = std::fs::remove_file(socket_path) {
                        return Err(format!("failed to delete previous socket: {e}"));
                    }
                }
            }
            Ok(true) => {
                return Err("There seems to already be another instance running...".to_string())
            }
            Err(e) => {
                eprintln!("WARNING: failed to read '/proc' directory to determine whether the daemon is running: {e}
                          Falling back to trying to checking if the socket file exists...");
                let socket_path = get_socket_path();
                if socket_path.exists() {
                    return Err(format!(
                        "Found socket at {}. There seems to be an instance already running...",
                        socket_path.to_string_lossy()
                    ));
                }
            }
        }
        spawn_daemon(*no_daemon)?;
        if *no_daemon {
            return Ok(());
        }
    }

fn make_request(args: &Swww) -> Result<Request, String> {
    match args {
        Swww::Clear(c) => Ok(Request::Clear(communication::Clear {
            color: c.color,
            outputs: split_cmdline_outputs(&c.outputs),
        })),
        Swww::Img(img) => {
            let requested_outputs = split_cmdline_outputs(&img.outputs);
            let (dims, outputs) = get_dimensions_and_outputs(requested_outputs)?;
            let (img_raw, is_gif) = read_img(&img.path)?;
            let img_request = make_img_request(img, img_raw, &dims, &outputs)?;
            if is_gif {
                let animations = make_animation_request(img, &dims, &outputs);
                let socket = connect_to_socket(5, 100)?;
                Request::Img(img_request).send(&socket)?;
                Answer::receive(socket)?;
                match animations.join() {
                    Ok(result) => Ok(Request::Animation(result?)),
                    Err(e) => Err(format!("failed to join animations thread: {e:?}")),
                }
            } else {
                Ok(Request::Img(img_request))
            }
        }
        Swww::Init { .. } => Ok(Request::Init),
        Swww::Kill => Ok(Request::Kill),
        Swww::Query => Ok(Request::Query),
    }
}

fn split_cmdline_outputs(outputs: &str) -> Vec<String> {
    outputs
        .split(' ')
        .map(|s| s.to_owned())
        .filter(|s| !s.is_empty())
        .collect()
}

fn read_img(path: &Path) -> Result<(RgbaImage, bool), String> {
    if let Some("-") = path.to_str() {
        let mut reader = BufReader::new(stdin());
        let mut buffer = Vec::new();
        if let Err(e) = reader.read_to_end(&mut buffer) {
            return Err(format!("failed to read stdin: {e}"));
        }

return match image::load_from_memory(&buffer) {
            Ok(img) => Ok((img.into_rgba8(), false)),
            Err(e) => return Err(format!("failed load image from memory: {e}")),
        };
    }

let imgbuf = match image::io::Reader::open(path) {
        Ok(img) => img,
        Err(e) => return Err(format!("failed to open image: {e}")),
    };

let imgbuf = match imgbuf.with_guessed_format() {
        Ok(img) => img,
        Err(e) => return Err(format!("failed to detect the image's format: {e}")),
    };

let is_gif = imgbuf.format() == Some(image::ImageFormat::Gif);
    match imgbuf.decode() {
        Ok(img) => Ok((img.into_rgba8(), is_gif)),
        Err(e) => Err(format!("failed to decode image: {e}")),
    }
}

fn make_img_request(
    img: &cli::Img,
    img_raw: image::RgbaImage,
    dims: &[(u32, u32)],
    outputs: &[Vec<String>],
) -> Result<communication::ImageRequest, String> {
    let transition = make_transition(img);
    let mut unique_requests = Vec::with_capacity(dims.len());
    for (dim, outputs) in dims.iter().zip(outputs) {
        unique_requests.push((
            communication::Img {
                img: if img.no_resize {
                    img_pad(img_raw.clone(), *dim, &img.fill_color)?
                } else {
                    img_resize(img_raw.clone(), *dim, make_filter(&img.filter))?
                },
                path: match img.path.canonicalize() {
                    Ok(p) => p,
                    Err(e) => {
                        if let Some("-") = img.path.to_str() {
                            PathBuf::from("STDIN")
                        } else {
                            return Err(format!("failed no canonicalize image path: {e}"));
                        }
                    }
                },
            },
            outputs.to_owned(),
        ));
    }

Ok((transition, unique_requests))
}

#[allow(clippy::type_complexity)]
fn get_dimensions_and_outputs(
    requested_outputs: Vec<String>,
) -> Result<(Vec<(u32, u32)>, Vec<Vec<String>>), String> {
    let mut outputs: Vec<Vec<String>> = Vec::new();
    let mut dims: Vec<(u32, u32)> = Vec::new();
    let mut imgs: Vec<communication::BgImg> = Vec::new();

if should_add {
                    outputs.push(vec![info.name]);
                    dims.push(real_dim);
                    imgs.push(info.img);
                }
            }
            if outputs.is_empty() {
                Err("none of the requested outputs are valid".to_owned())
            } else {
                Ok((dims, outputs))
            }
        }
        Answer::Err(e) => Err(format!("failed to query swww-daemon: {e}")),
        _ => unreachable!(),
    }
}

fn make_animation_request(
    img: &cli::Img,
    dims: &[(u32, u32)],
    outputs: &[Vec<String>],
) -> JoinHandle<Result<AnimationRequest, String>> {
    let dims = dims.to_owned();
    let outputs = outputs.to_owned();
    let filter = make_filter(&img.filter);
    let imgpath = img.path.clone();
    let no_resize = img.no_resize;
    let fill_color = img.fill_color;
    let sync = img.sync;
    std::thread::spawn(move || {
        let mut animations = Vec::with_capacity(dims.len());
        for (dim, outputs) in dims.into_iter().zip(outputs) {
            let imgbuf = match image::io::Reader::open(&imgpath) {
                Ok(img) => img.into_inner(),
                Err(e) => return Err(format!("error opening image during animation: {e}")),
            };
            let gif = match GifDecoder::new(imgbuf) {
                Ok(gif) => gif,
                Err(e) => return Err(format!("failed to decode gif during animation: {e}")),
            };
            animations.push((
                communication::Animation {
                    animation: compress_frames(gif, dim, filter, no_resize, &fill_color)?
                        .into_boxed_slice(),
                    sync,
                },
                outputs.to_owned(),
            ));
        }
        Ok(animations)
    })
}

fn compress_frames(
    gif: GifDecoder<BufReader<File>>,
    dim: (u32, u32),
    filter: FilterType,
    no_resize: bool,
    color: &[u8; 3],
) -> Result<Vec<(BitPack, Duration)>, String> {
    let mut compressed_frames = Vec::new();
    let mut frames = gif.into_frames();

// The first frame should always exist
    let first = frames.next().unwrap().unwrap();
    let first_duration = first.delay().numer_denom_ms();
    let first_duration = Duration::from_millis((first_duration.0 / first_duration.1).into());
    let first_img = if no_resize {
        img_pad(first.into_buffer(), dim, color)?
    } else {
        img_resize(first.into_buffer(), dim, filter)?
    };

let mut canvas = first_img.clone();
    while let Some(Ok(frame)) = frames.next() {
        let (dur_num, dur_div) = frame.delay().numer_denom_ms();
        let duration = Duration::from_millis((dur_num / dur_div).into());

let img = if no_resize {
            img_pad(frame.into_buffer(), dim, color)?
        } else {
            img_resize(frame.into_buffer(), dim, filter)?
        };

compressed_frames.push((BitPack::pack(&mut canvas, &img)?, duration));
    }
    //Add the first frame we got earlier:
    compressed_frames.push((BitPack::pack(&mut canvas, &first_img)?, first_duration));

Ok(compressed_frames)
}

fn make_filter(filter: &cli::Filter) -> fast_image_resize::FilterType {
    match filter {
        cli::Filter::Nearest => fast_image_resize::FilterType::Box,
        cli::Filter::Bilinear => fast_image_resize::FilterType::Bilinear,
        cli::Filter::CatmullRom => fast_image_resize::FilterType::CatmullRom,
        cli::Filter::Mitchell => fast_image_resize::FilterType::Mitchell,
        cli::Filter::Lanczos3 => fast_image_resize::FilterType::Lanczos3,
    }
}

fn img_pad(
    mut img: image::RgbaImage,
    dimensions: (u32, u32),
    color: &[u8; 3],
) -> Result<Vec<u8>, String> {
    let (padded_w, padded_h) = dimensions;
    let (padded_w, padded_h) = (padded_w as usize, padded_h as usize);
    let mut padded = Vec::with_capacity(padded_w * padded_w * 4);

let img = image::imageops::crop(&mut img, 0, 0, dimensions.0, dimensions.1).to_image();
    let (img_w, img_h) = img.dimensions();
    let (img_w, img_h) = (img_w as usize, img_h as usize);
    let raw_img = img.into_vec();

for _ in 0..(((padded_h - img_h) / 2) * padded_w) {
        padded.push(color[2]);
        padded.push(color[1]);
        padded.push(color[0]);
        padded.push(255);
    }

for row in 0..img_h {
        for _ in 0..(padded_w - img_w) / 2 {
            padded.push(color[2]);
            padded.push(color[1]);
            padded.push(color[0]);
            padded.push(255);
        }

for pixel in raw_img[(row * img_w * 4)..((row + 1) * img_w * 4)].chunks_exact(4) {
            padded.push(pixel[2]);
            padded.push(pixel[1]);
            padded.push(pixel[0]);
            padded.push(pixel[3]);
        }
        for _ in 0..(padded_w - img_w) / 2 {
            padded.push(color[2]);
            padded.push(color[1]);
            padded.push(color[0]);
            padded.push(255);
        }
    }

while padded.len() < (padded_h * padded_w * 4) {
        padded.push(color[2]);
        padded.push(color[1]);
        padded.push(color[0]);
        padded.push(255);
    }

Ok(padded)
}

fn img_resize(
    img: image::RgbaImage,
    dimensions: (u32, u32),
    filter: FilterType,
) -> Result<Vec<u8>, String> {
    let (width, height) = dimensions;
    let (img_w, img_h) = img.dimensions();
    let mut resized_img = if (img_w, img_h) != (width, height) {
        let mut src = match fast_image_resize::Image::from_vec_u8(
            // We unwrap below because we know the images's dimensions should never be 0
            NonZeroU32::new(img_w).unwrap(),
            NonZeroU32::new(img_h).unwrap(),
            img.into_raw(),
            PixelType::U8x4,
        ) {
            Ok(i) => i,
            Err(e) => return Err(e.to_string()),
        };

let alpha_mul_div = fast_image_resize::MulDiv::default();
        if let Err(e) = alpha_mul_div.multiply_alpha_inplace(&mut src.view_mut()) {
            return Err(e.to_string());
        }

// We unwrap below because we know the outputs's dimensions should never be 0
        let new_w = NonZeroU32::new(width).unwrap();
        let new_h = NonZeroU32::new(height).unwrap();
        let mut src_view = src.view();
        src_view.set_crop_box_to_fit_dst_size(new_w, new_h, Some((0.5, 0.5)));

let mut dst = fast_image_resize::Image::new(new_w, new_h, PixelType::U8x4);
        let mut dst_view = dst.view_mut();

let mut resizer = Resizer::new(fast_image_resize::ResizeAlg::Convolution(filter));
        if let Err(e) = resizer.resize(&src_view, &mut dst_view) {
            return Err(e.to_string());
        }

if let Err(e) = alpha_mul_div.divide_alpha_inplace(&mut dst_view) {
            return Err(e.to_string());
        }

dst.into_vec()
    } else {
        img.into_vec()
    };

// The ARGB is 'little endian', so here we must  put the order
    // of bytes 'in reverse', so it needs to be BGRA.
    for pixel in resized_img.chunks_exact_mut(4) {
        pixel.swap(0, 2);
    }

Ok(resized_img)
}

fn make_transition(img: &cli::Img) -> communication::Transition {
    let mut angle = img.transition_angle;

let x = match img.transition_pos.x {
        cli::CliCoord::Percent(x) => {
            if !(0.0..=1.0).contains(&x) {
                println!(
                    "Warning: x value not in range [0,1] position might be set outside screen: {x}"
                );
            }
            Coord::Percent(x)
        }
        cli::CliCoord::Pixel(x) => Coord::Pixel(x),
    };

let y = match img.transition_pos.y {
        cli::CliCoord::Percent(y) => {
            if !(0.0..=1.0).contains(&y) {
                println!(
                    "Warning: y value not in range [0,1] position might be set outside screen: {y}"
                );
            }
            Coord::Percent(y)
        }
        cli::CliCoord::Pixel(y) => Coord::Pixel(y),
    };

let mut pos = Position::new(x, y);

communication::Transition {
        duration: img.transition_duration,
        step: img.transition_step,
        fps: img.transition_fps,
        bezier: img.transition_bezier,
        angle,
        pos,
        transition_type,
        wave: img.transition_wave,
    }
}

fn spawn_daemon(no_daemon: bool) -> Result<(), String> {
    let cmd = "swww-daemon";
    if no_daemon {
        match std::process::Command::new(cmd).status() {
            Ok(_) => Ok(()),
            Err(e) => Err(format!("error spawning swww-daemon: {e}")),
        }
    } else {
        match std::process::Command::new(cmd)
            .stdout(Stdio::null())
            .stderr(Stdio::null())
            .spawn()
        {
            Ok(_) => Ok(()),
            Err(e) => Err(format!("error spawning swww-daemon: {e}")),
        }
    }
}

/// We make sure the Stream is always set to blocking mode
///
/// * `tries` -  how make times to attempt the connection
/// * `interval` - how long to wait between attempts, in milliseconds
fn connect_to_socket(tries: u8, interval: u64) -> Result<UnixStream, String> {
    //Make sure we try at least once
    let tries = if tries == 0 { 1 } else { tries };
    let path = get_socket_path();
    let mut error = None;
    for _ in 0..tries {
        match UnixStream::connect(&path) {
            Ok(socket) => {
                if let Err(e) = socket.set_nonblocking(false) {
                    return Err(format!("Failed to set blocking connection: {e}"));
                }
                return Ok(socket);
            }
            Err(e) => error = Some(e),
        }
        std::thread::sleep(Duration::from_millis(interval));
    }
    let error = error.unwrap();
    if error.kind() == std::io::ErrorKind::NotFound {
        return Err("Socket file not found. Are you sure swww-daemon is running?".to_string());
    }

Err(format!("Failed to connect to socket: {error}"))
}

fn is_daemon_running() -> Result<bool, String> {
    let proc = PathBuf::from("/proc");

let entries = match proc.read_dir() {
        Ok(e) => e,
        Err(e) => return Err(e.to_string()),
    };

for entry in entries.flatten() {
        let dirname = entry.file_name();
        if let Ok(pid) = dirname.to_string_lossy().parse::<u32>() {
            if std::process::id() == pid {
                continue;
            }
            let mut entry_path = entry.path();
            entry_path.push("cmdline");
            if let Ok(cmd) = std::fs::read_to_string(entry_path) {
                let mut args = cmd.split(&[' ', '\0']);
                if let Some(arg0) = args.next() {
                    if arg0.ends_with("swww-daemon") {
                        return Ok(true);
                    }
                }
            }
        }
    }

Ok(false)
}
07070100000023000041ED00000000000000000000000263EF979300000000000000000000000000000000000000000000001100000000swww-0.7.2/tests07070100000024000081A400000000000000000000000163EF979300001272000000000000000000000000000000000000002000000000swww-0.7.2/tests/integration.rs//! These are relatively simple tests just to make sure no basic functionally
//! was broken by anything. They are no substitute to actually trying to run
//! the program yourself and seeing if anything broke (e.g. maybe images stopped
//! rendering correctly, somehow, without the program breaking down)

use assert_cmd::Command;
use std::path::PathBuf;

const TEST_IMG_DIR: &str = "test_images";
const TEST_IMGS: [&str; 3] = [
    "test_images/test1.jpg",
    "test_images/test2.png",
    "test_images/test3.bmp",
];

fn make_img_dir() {
    let p = PathBuf::from(TEST_IMG_DIR);
    if !p.is_dir() {
        std::fs::create_dir(p)
            .expect("Failed to create directory to put the images used for testing: ");
    }
}

fn make_test_imgs() {
    make_img_dir();
    for (i, test_img) in TEST_IMGS.iter().enumerate() {
        let p = PathBuf::from(test_img);
        if !p.is_file() {
            //We use i to create images of different dimensions, just to be more through
            let mut imgbuf = image::ImageBuffer::new(400 * (i as u32 + 1), 400 * (i as u32 + 1));

//This is taken straight from the image crate fractal example
            for (x, y, pixel) in imgbuf.enumerate_pixels_mut() {
                let r = (0.3 * x as f32) as u8;
                let b = (0.3 * y as f32) as u8;
                *pixel = image::Rgb([r, 0, b]);
            }

imgbuf
                .save(test_img)
                .expect("Failed to create image for testing: ");
        }
    }
}

fn cmd() -> Command {
    Command::cargo_bin("swww").unwrap()
}

fn start_daemon() -> Command {
    Command::cargo_bin("swww-daemon").unwrap()
}

#[test]
#[ignore]
fn general_commands() {
    make_test_imgs();

init_daemon();
    init_daemon_twice();
    sending_imgs();
    sending_img_that_does_not_exist();
    sending_imgs_with_filter();
    sending_img_with_filter_that_does_not_exist();
    sending_img_from_stdin();
    let output = query_outputs();
    sending_img_to_individual_monitors(&output);
    sending_img_to_monitor_that_does_not_exist();
    sending_img_with_custom_transition();
    clear_outputs();
    killing_daemon();
    cmd().arg("query").assert().failure(); //daemon is dead, so this should fail
}

fn sending_imgs() {
    for img in TEST_IMGS {
        cmd().arg("img").arg(img).assert().success();
    }
}

fn init_daemon() {
    std::thread::spawn(|| {
        start_daemon().assert().success();
    });
    // sleep for a bit to allow the daemon to init correctly
    // note that even though this is a race-condition, in the actual program we
    // have implemented some proper syncronization. And, in here, it is *very*
    // unlikely that this will ever be a problem, (and, if it is, it is not a
    // very big deal, it will merely cause init_daemon_twice to false-fail)
    std::thread::sleep(std::time::Duration::from_millis(100));
}

/// Should fail since we already have an instance running
fn init_daemon_twice() {
    start_daemon().assert().failure();
}

fn sending_img_that_does_not_exist() {
    cmd().arg("img").arg("I don't exist").assert().failure();
}

fn query_outputs() -> String {
    let output = cmd().arg("query").output().expect("Query failed!");
    let stdout = String::from_utf8(output.stdout).unwrap();
    stdout.split_once(':').unwrap().0.to_string()
}

fn sending_img_to_individual_monitors(output: &str) {
    cmd()
        .arg("img")
        .arg(TEST_IMGS[0])
        .arg("-o")
        .arg(output)
        .assert()
        .success();
}

fn sending_img_to_monitor_that_does_not_exist() {
    cmd()
        .arg("img")
        .arg(TEST_IMGS[0])
        .arg("-o")
        .arg("AHOY")
        .assert()
        .failure();
}

fn sending_imgs_with_filter() {
    for filter in ["Nearest", "Bilinear", "CatmullRom", "Mitchell", "Lanczos3"] {
        cmd()
            .arg("img")
            .arg(TEST_IMGS[0])
            .arg("-f")
            .arg(filter)
            .assert()
            .success();
    }
}

fn sending_img_from_stdin() {
    cmd()
        .arg("img")
        .arg("-")
        .pipe_stdin("test_images/test1.jpg")
        .expect("failed to pipe stdin")
        .assert()
        .success();
}

fn sending_img_with_filter_that_does_not_exist() {
    cmd()
        .arg("img")
        .arg(TEST_IMGS[0])
        .arg("-f")
        .arg("AHOY")
        .assert()
        .failure();
}

fn sending_img_with_custom_transition() {
    cmd()
        .arg("img")
        .arg(TEST_IMGS[0])
        .arg("--transition-step")
        .arg("200")
        .assert()
        .success();
}

fn clear_outputs() {
    cmd().arg("clear").assert().success();
}

fn killing_daemon() {
    cmd().arg("kill").assert().success();
}
07070100000025000081A400000000000000000000000163EF97930000053F000000000000000000000000000000000000002000000000swww-0.7.2/tests/spell_check.rsuse std::process::Command;

// We ignore because people might not have codespell installed, and I don't want to force anyone to
// install to e.g. run tests before installing. This may change in the future
// IMPORTANT: THIS TEST WILL DELETE THE GENERATED DOC FILES (just run ./doc/gen.sh to generate them
// again)
#[test]
#[ignore]
fn spell_check_code_and_man_pages() {
    // Make sure no docs were generated
    let _ = std::fs::remove_dir_all("doc/generated");
    match Command::new("codespell")
        .args([
            "--enable-colors",
            "--ignore-words-list",
            "crate",
            "src",        // client
            "daemon/src", // daemon
            "utils/src",  // common code
            "doc",        // man pages
            "CHANGELOG.md",
            "README.md"
        ])
        .output()
    {
        Ok(output) => {
            if !output.status.success() {
                panic!("\n{}", String::from_utf8_lossy(&output.stdout));
            }
        }
        Err(e) => match e.kind() {
            std::io::ErrorKind::NotFound => {
                eprintln!(
                    "'codespell' not found. Please install in order to do spell checking:
                          `pip install codespell`"
                );
            }
            _ => eprintln!("{e}"),
        },
    }
}
07070100000026000041ED00000000000000000000000363EF979300000000000000000000000000000000000000000000001100000000swww-0.7.2/utils07070100000027000081A400000000000000000000000163EF9793000000D9000000000000000000000000000000000000001C00000000swww-0.7.2/utils/Cargo.toml[package]
name = "utils"
version = "0.1.0"
edition = "2021"

[dependencies]

lazy_static = "1.4"
lzzzz = "=1.0.4"
serde = { version = "1.0", features = [ "derive" ] }
bincode = "1.3"

[dev-dependencies]

rand = "0.8"
07070100000028000041ED00000000000000000000000263EF979300000000000000000000000000000000000000000000001500000000swww-0.7.2/utils/src07070100000029000081A400000000000000000000000163EF97930000236C000000000000000000000000000000000000002600000000swww-0.7.2/utils/src/communication.rsuse serde::{Deserialize, Serialize};
use std::{
    fmt,
    fs::File,
    io::{BufReader, BufWriter},
    os::unix::net::UnixStream,
    path::{Path, PathBuf},
    time::Duration,
};

use crate::comp_decomp::BitPack;

#[derive(PartialEq, Clone, Serialize, Deserialize, Debug)]
pub enum Coord {
    Pixel(f32),
    Percent(f32),
}

#[derive(PartialEq, Clone, Serialize, Deserialize, Debug)]
pub struct Position {
    pub x: Coord,
    pub y: Coord,
}

impl Position {
    pub fn new(x: Coord, y: Coord) -> Self {
        Self { x, y }
    }

pub fn to_pixel(&self, dim: (u32, u32)) -> (f32, f32) {
        let x = match self.x {
            Coord::Pixel(x) => x,
            Coord::Percent(x) => x * dim.0 as f32,
        };

let y = match self.y {
            Coord::Pixel(y) => y,
            Coord::Percent(y) => y * dim.1 as f32,
        };

(x, y)
    }

pub fn to_percent(&self, dim: (u32, u32)) -> (f32, f32) {
        let x = match self.x {
            Coord::Pixel(x) => x / dim.0 as f32,
            Coord::Percent(x) => x,
        };

let y = match self.y {
            Coord::Pixel(y) => y / dim.1 as f32,
            Coord::Percent(y) => y,
        };

(x, y)
    }
}

#[derive(PartialEq, Eq, Clone, Serialize, Deserialize)]
pub enum BgImg {
    Color([u8; 3]),
    Img(PathBuf),
}

impl fmt::Display for BgImg {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            BgImg::Color(color) => write!(f, "color: {}{}{}", color[0], color[1], color[2]),
            BgImg::Img(p) => write!(
                f,
                "image: {:#?}",
                p.file_name().unwrap_or_else(|| std::ffi::OsStr::new("?"))
            ),
        }
    }
}

#[derive(Clone, Serialize, Deserialize)]
pub struct BgInfo {
    pub name: String,
    pub dim: (u32, u32),
    pub scale_factor: i32,
    pub img: BgImg,
}

impl BgInfo {
    #[must_use]
    pub fn real_dim(&self) -> (u32, u32) {
        (
            self.dim.0 * self.scale_factor as u32,
            self.dim.1 * self.scale_factor as u32,
        )
    }
}

impl fmt::Display for BgInfo {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "{}: {}x{}, scale: {}, currently displaying: {}",
            self.name, self.dim.0, self.dim.1, self.scale_factor, self.img
        )
    }
}

#[derive(Serialize, Deserialize, Clone, Debug)]
pub enum TransitionType {
    Simple,
    Outer,
    Wipe,
    Grow,
    Wave,
}

#[derive(Serialize, Deserialize, Clone)]
pub struct Transition {
    pub transition_type: TransitionType,
    pub duration: f32,
    pub step: u8,
    pub fps: u8,
    pub angle: f64,
    pub pos: Position,
    pub bezier: (f32, f32, f32, f32),
    pub wave: (f32, f32),
}

#[derive(Serialize, Deserialize)]
pub struct Clear {
    pub color: [u8; 3],
    pub outputs: Vec<String>,
}

#[derive(Serialize, Deserialize)]
pub struct Img {
    pub path: PathBuf,
    pub img: Vec<u8>,
}

impl TryFrom<&mut BufReader<File>> for Img {
    type Error = String;
    fn try_from(file_reader: &mut BufReader<File>) -> Result<Self, Self::Error> {
        match bincode::deserialize_from(file_reader) {
            Ok(i) => Ok(i),
            Err(e) => Err(format!("Failed to deserialize request: {e}")),
        }
    }
}

#[derive(Serialize, Deserialize)]
pub struct Animation {
    pub animation: Box<[(BitPack, Duration)]>,
    pub sync: bool,
}

impl TryFrom<&mut BufReader<File>> for Animation {
    type Error = String;
    fn try_from(file_reader: &mut BufReader<File>) -> Result<Self, Self::Error> {
        match bincode::deserialize_from(file_reader) {
            Ok(i) => Ok(i),
            Err(e) => Err(format!("Failed to deserialize request: {e}")),
        }
    }
}

pub type AnimationRequest = Vec<(Animation, Vec<String>)>;
pub type ImageRequest = (Transition, Vec<(Img, Vec<String>)>);

#[derive(Serialize, Deserialize)]
pub enum Request {
    Animation(AnimationRequest),
    Clear(Clear),
    Init,
    Kill,
    Query,
    Img(ImageRequest),
}

impl Request {
    pub fn send(&self, stream: &UnixStream) -> Result<(), String> {
        let writer = BufWriter::new(stream);
        std::thread::scope(|s| {
            let serializer = s.spawn(|| match bincode::serialize_into(writer, self) {
                Ok(()) => Ok(()),
                Err(e) => Err(format!("Failed to serialize request: {e}")),
            });

match self {
                Request::Animation(animations) => match get_cache_path() {
                    Ok(cache_path) => {
                        s.spawn(move || Self::cache_animations(animations, cache_path));
                    }
                    Err(e) => eprintln!("failed to get cache path: {e}"),
                },
                Request::Img((_, images)) => match get_cache_path() {
                    Ok(cache_path) => {
                        s.spawn(move || Self::cache_images(images, cache_path));
                    }
                    Err(e) => eprintln!("failed to get cache path: {e}"),
                },
                _ => (),
            };

match serializer.join() {
                Ok(result) => result,
                Err(e) => Err(format!("{e:?}")),
            }
        })
    }

pub fn receive(stream: &UnixStream) -> Result<Self, String> {
        let reader = BufReader::new(stream);
        match bincode::deserialize_from(reader) {
            Ok(i) => Ok(i),
            Err(e) => Err(format!("Failed to deserialize request: {e}")),
        }
    }

fn cache_images(images: &[(Img, Vec<String>)], mut cache_path: PathBuf) {
        for (img, outputs) in images {
            for output in outputs {
                cache_path.push(output);
                match File::create(&cache_path) {
                    Ok(file) => {
                        let writer = BufWriter::new(file);
                        if let Err(e) = bincode::serialize_into(writer, img) {
                            eprintln!(
                                "failed to serialize image into cache file '{cache_path:?}': {e}"
                            )
                        }
                    }
                    Err(e) => eprintln!("failed to create cache file '{cache_path:?}': {e}"),
                }
                cache_path.pop();
            }
        }
    }

fn cache_animations(animations: &[(Animation, Vec<String>)], mut cache_path: PathBuf) {
        for (animation, outputs) in animations {
            for output in outputs {
                cache_path.push(output);
                match File::options().append(true).open(&cache_path) {
                    Ok(file) => {
                        let writer = BufWriter::new(file);
                        if let Err(e) = bincode::serialize_into(writer, animation) {
                            eprintln!("failed to serialize animation into cache file '{cache_path:?}': {e}")
                        }
                    }
                    Err(e) => {
                        eprintln!("failed to append animation to cache file '{cache_path:?}': {e}")
                    }
                }
                cache_path.pop();
            }
        }
    }
}

#[derive(Serialize, Deserialize)]
pub enum Answer {
    Ok,
    Err(String),
    Info(Vec<BgInfo>),
}

impl Answer {
    pub fn send(&self, stream: &UnixStream) -> Result<(), String> {
        match bincode::serialize_into(stream, self) {
            Ok(()) => Ok(()),
            Err(e) => Err(format!("Failed to send answer: {e}")),
        }
    }

pub fn receive(stream: UnixStream) -> Result<Self, String> {
        #[cfg(debug_assertions)]
        let timeout = Duration::from_secs(30); //Some operations take a while to respond in debug mode
        #[cfg(not(debug_assertions))]
        let timeout = Duration::from_secs(5);

if let Err(e) = stream.set_read_timeout(Some(timeout)) {
            return Err(format!("Failed to set read timeout: {e}"));
        };

match bincode::deserialize_from(stream) {
            Ok(i) => Ok(i),
            Err(e) => Err(format!("Failed to receive answer: {e}")),
        }
    }
}

#[must_use]
pub fn get_socket_path() -> PathBuf {
    let runtime_dir = if let Ok(dir) = std::env::var("XDG_RUNTIME_DIR") {
        dir
    } else {
        "/tmp/swww".to_string()
    };
    let runtime_dir = Path::new(&runtime_dir);
    runtime_dir.join("swww.socket")
}

pub fn get_cache_path() -> Result<PathBuf, String> {
    let cache_dir = match std::env::var("XDG_CACHE_HOME") {
        Ok(dir) => dir + "/swww",
        Err(_) => match std::env::var("HOME") {
            Ok(dir) => dir + ".cache/swww",
            Err(_) => return Err("failed to read both XDG_CACHE_HOME and HOME env vars".to_owned()),
        },
    };

let cache_path = PathBuf::from(&cache_dir);
    if !cache_path.exists() {
        if let Err(e) = std::fs::create_dir(&cache_path) {
            return Err(format!("failed to create cache_path: {e}"));
        }
    }

Ok(cache_path)
}
0707010000002A000081A400000000000000000000000163EF979300002D21000000000000000000000000000000000000002400000000swww-0.7.2/utils/src/comp_decomp.rs//! # Compression Strategy
//!
//! For every pixel, we drop the alpha part; I don't think anyone will use transparency for a
//! background (nor if it even makes sense)
//!
//! For what's left, we store only the difference from the last frame to this one. We do that as
//! follows:
//! * First, we count how many pixels didn't change. We store that value as a u8.
//!   Every time the u8 hits the max (i.e. 255, or 0xFF), we push in onto the vector
//!   and restart the counting.
//! * Once we find a pixel that has changed, we count, starting from that one, how many changed,
//!   the same way we counted above (i.e. store as u8, every time it hits the max push and restart
//!   the counting)
//! * Then, we store all the new bytes.
//! * Start from the top until we are done with the image
//!

use lzzzz::lz4f;
use serde::{Deserialize, Serialize};

lazy_static::lazy_static! {
    static ref COMPRESSION_PREFERENCES: lz4f::Preferences = lz4f::PreferencesBuilder::new()
            .block_size(lz4f::BlockSize::Max256KB)
            .compression_level(9)
            .build();
}

/// This calculates the difference between the current(cur) frame and the next(goal).
/// The closure you pass is run at every difference. It dictates the update logic of the current
/// frame. With that, you can control whether all different pixels changed are updated, or only the
/// ones at a certain position. It is meant to be used primarily when writing transitions
fn pack_bytes<F>(cur: &mut [u8], goal: &[u8], mut f: F) -> Box<[u8]>
where
    F: FnMut(&mut [u8; 4], &[u8; 4], usize),
{
    let mut v = Vec::with_capacity((goal.len() * 5) / 8);

let mut iter = zip_eq(pixels_mut(cur), pixels(goal)).enumerate();
    let mut to_add = Vec::with_capacity(333); // 100 pixels
    while let Some((mut i, (mut cur, mut goal))) = iter.next() {
        let mut equals = 0;
        while cur == goal {
            equals += 1;
            match iter.next() {
                None => return v.into_boxed_slice(),
                Some((j, (c, g))) => {
                    i = j;
                    cur = c;
                    goal = g;
                }
            }
        }

let mut diffs = 0;
        while cur != goal {
            f(cur, goal, i);
            to_add.extend_from_slice(&cur[0..3]);
            diffs += 1;
            match iter.next() {
                None => break,
                Some((j, (c, g))) => {
                    i = j;
                    cur = c;
                    goal = g;
                }
            }
        }
        let j = v.len() + equals / 255;
        v.resize(1 + v.len() + equals / 255 + diffs / 255, 255);
        v[j] = (equals % 255) as u8;
        v.push((diffs % 255) as u8);
        v.append(&mut to_add);
    }
    v.push(0);
    v.into_boxed_slice()
}

fn unpack_bytes(buf: &mut [u8], diff: &[u8]) {
    let buf_chunks = pixels_mut(buf);
    let mut diff_idx = 0;
    let mut pix_idx = 0;
    while diff_idx < diff.len() - 1 {
        while diff[diff_idx] == u8::MAX {
            pix_idx += u8::MAX as usize;
            diff_idx += 1;
        }
        pix_idx += diff[diff_idx] as usize;
        diff_idx += 1;

let mut to_cpy = 0;
        while diff[diff_idx] == u8::MAX {
            to_cpy += u8::MAX as usize;
            diff_idx += 1;
        }
        to_cpy += diff[diff_idx] as usize;
        diff_idx += 1;

for _ in 0..to_cpy {
            unsafe {
                buf_chunks
                    .get_unchecked_mut(pix_idx)
                    .clone_from_slice(diff.get_unchecked(diff_idx..diff_idx + 4));
            }
            diff_idx += 3;
            pix_idx += 1;
        }
        pix_idx += 1;
    }
}

/// This struct represents the cached difference between the previous frame and the next
#[derive(Serialize, Deserialize)]
pub struct BitPack {
    inner: Box<[u8]>,
}

impl BitPack {
    /// Compresses a frame of animation by getting the difference between the previous and the
    /// current frame.
    /// IMPORTANT: this will change `prev` into `cur`, that's why it needs to be 'mut'
    pub fn pack(prev: &mut [u8], cur: &[u8]) -> Result<Self, String> {
        let bit_pack = pack_bytes(prev, cur, |old, new, _| *old = *new);
        let mut v = Vec::with_capacity(bit_pack.len() / 2);
        match lzzzz::lz4f::compress_to_vec(&bit_pack, &mut v, &COMPRESSION_PREFERENCES) {
            Ok(_) => Ok(BitPack {
                inner: v.into_boxed_slice(),
            }),
            Err(e) => Err(e.to_string()),
        }
    }

/// Produces a `ReadiedPack`, which can be sent through a channel to be unpacked later
    #[must_use]
    pub fn ready(&self, expected_buf_size: usize) -> ReadiedPack {
        let mut v = Vec::with_capacity(self.inner.len() * 3);
        // Note: panics will never happen because BitPacked is *always* only produced with
        // correct lz4 compression
        lz4f::decompress_to_vec(&self.inner, &mut v).unwrap();
        ReadiedPack {
            inner: v.into_boxed_slice(),
            expected_buf_size,
        }
    }
}

/// This is what we send through the channel to be drawn
pub struct ReadiedPack {
    inner: Box<[u8]>,
    /// This field will ensure we won't ever try to unpack the images on a buffer of the wrong size,
    /// which ultimately is what allows us to use unsafe in the unpack_bytes function
    expected_buf_size: usize,
}

impl ReadiedPack {
    /// This should only be used in the transitions. For caching the animation frames, use the
    /// Bitpack struct
    ///
    /// The `f` runs at every different pixel found, iterating through the three colors BGR. Its
    /// parameters are:
    ///
    /// * First -> old img byte, that has to change to the new one according to the transition logic
    /// * Second -> new img byte. This stays constant
    /// * Third -> the pixel's position in the image. This can be used to make more complex
    ///   transition logic
    #[must_use]
    pub fn new<F>(cur: &mut [u8], goal: &[u8], f: F) -> Self
    where
        F: FnMut(&mut [u8; 4], &[u8; 4], usize),
    {
        let bit_pack = pack_bytes(cur, goal, f);
        ReadiedPack {
            inner: bit_pack,
            expected_buf_size: cur.len(),
        }
    }

pub fn is_empty(&self) -> bool {
        self.inner.is_empty()
    }

///return whether unpacking was successful. Note it can only fail if `buf.len() !=
    ///expected_buf_size`
    pub fn unpack(&self, buf: &mut [u8]) -> bool {
        if buf.len() >= self.expected_buf_size {
            if !self.inner.is_empty() {
                unpack_bytes(buf, &self.inner);
            }
            true
        } else {
            false
        }
    }
}

// Utility functions. Largely copied from the Itertools and Bytemuck crates

/// An iterator which iterates two other iterators simultaneously
/// Copy pasted from the Iterator crate, and adapted for our purposes
#[must_use = "iterator adaptors are lazy and do nothing unless consumed"]
struct ZipEq<'a, I> {
    a: std::slice::IterMut<'a, I>,
    b: std::slice::Iter<'a, I>,
}

fn zip_eq<'a, I>(i: &'a mut [I], j: &'a [I]) -> ZipEq<'a, I> {
    if i.len() != j.len() {
        unreachable!(
            "Iterators of zip_eq have different sizes: {}, {}",
            i.len(),
            j.len()
        );
    }
    ZipEq {
        a: i.iter_mut(),
        b: j.iter(),
    }
}

impl<'a, I> Iterator for ZipEq<'a, I> {
    type Item = (&'a mut I, &'a I);

fn next(&mut self) -> Option<Self::Item> {
        match (self.a.next(), self.b.next()) {
            (None, None) => None,
            (Some(a), Some(b)) => Some((a, b)),
            _ => unsafe { std::hint::unreachable_unchecked() },
        }
    }
}

// The functions below were copy pasted and adapted from the bytemuck crate:

#[inline]
fn pixels(img: &[u8]) -> &[[u8; 4]] {
    if img.len() % 4 != 0 {
        unreachable!("Calling pixels with a wrongly formatted image");
    }
    unsafe { core::slice::from_raw_parts(img.as_ptr().cast::<[u8; 4]>(), img.len() / 4) }
}

#[inline]
fn pixels_mut(img: &mut [u8]) -> &mut [[u8; 4]] {
    if img.len() % 4 != 0 {
        unreachable!("Calling pixels_mut with a wrongly formatted image");
    }
    unsafe { core::slice::from_raw_parts_mut(img.as_ptr() as *mut [u8; 4], img.len() / 4) }
}

#[cfg(test)]
mod tests {
    use super::BitPack;
    use rand::prelude::random;

#[test]
    //Use this when annoying problems show up
    fn should_compress_and_decompress_to_same_info_small() {
        let frame1 = [1, 2, 3, 4, 5, 6, 7, 8];
        let frame2 = [1, 2, 3, 4, 8, 7, 6, 5];
        let compressed = BitPack::pack(&mut frame1.clone(), &frame2).unwrap();

let mut buf = frame1;
        let readied = compressed.ready(8);
        readied.unpack(&mut buf);
        for i in 0..2 {
            for j in 0..3 {
                assert_eq!(
                    frame2[i * 4 + j],
                    buf[i * 4 + j],
                    "\nframe2: {frame2:?}, buf: {buf:?}\n"
                );
            }
        }
    }

#[test]
    fn should_compress_and_decompress_to_same_info() {
        for _ in 0..10 {
            let mut original = Vec::with_capacity(20);
            for _ in 0..20 {
                let mut v = Vec::with_capacity(4000);
                for _ in 0..4000 {
                    v.push(random::<u8>());
                }
                original.push(v);
            }

let mut compressed = Vec::with_capacity(20);
            compressed
                .push(BitPack::pack(&mut original.last().unwrap().clone(), &original[0]).unwrap());
            for i in 1..20 {
                compressed.push(BitPack::pack(&mut original[i - 1].clone(), &original[i]).unwrap());
            }

#[test]
    fn should_compress_and_decompress_to_same_info_with_equal_data() {
        for _ in 0..10 {
            let mut original = Vec::with_capacity(20);
            for _ in 0..20 {
                let mut v = Vec::with_capacity(4000);
                for _ in 0..3000 {
                    v.push(random::<u8>());
                }
                for i in 0..1000 {
                    v.push((i % 255) as u8);
                }
                original.push(v);
            }

let mut buf = original.last().unwrap().clone();
            for i in 0..20 {
                let readied = compressed[i].ready(4000);
                readied.unpack(&mut buf);
                let mut j = 0;
                while j < 4000 {
                    for k in 0..3 {
                        assert_eq!(buf[j + k], original[i][j + k], "Failed at index: {}", j + k);
                    }
                    j += 4;
                }
            }
        }
    }
}
0707010000002B000081A400000000000000000000000163EF97930000002C000000000000000000000000000000000000001C00000000swww-0.7.2/utils/src/lib.rspub mod communication;
pub mod comp_decomp;
0707010000002C000081ED00000000000000000000000163EF979300000299000000000000000000000000000000000000001600000000swww-0.7.2/version.sh#!/bin/sh

# This is a helper script to use just before releasing a new version
# (it helps us not forget anything, as has happenned before)

if [ $# -lt 1 ]; then
	echo "Usage: $0 <new version name>"
	exit 1
fi

pkill swww-daemon

set -e

# don't forget testing everything
cargo test -- --include-ignored
./doc/gen.sh # make sure the docs "compile"

# Cargo.toml:
sed "s/^version = .*/version = \"$1\"/" Cargo.toml > TMP \
	&& mv TMP Cargo.toml

# CHANGELOG:
sed -e "s/^### Unreleased/### $1/" \
	-e '1s/^/### Unreleased\n\n\n/' CHANGELOG.md > TMP \
	&& mv TMP CHANGELOG.md

# Make sure it still builds (just to be 100% safe), and to update Cargo.lock
cargo build
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!434 blocks

Places

File swww-0.7.2.obscpio of Package swww (Revision c74068a8238c9227a6c9899374bb9067)

Places