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Vinzenz Schroeter 2025-02-15 12:39:31 +01:00
commit c069c1966b
96 changed files with 102 additions and 12425 deletions

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use flake

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@ -28,18 +28,7 @@ jobs:
run: sudo apt-get update && sudo apt-get install -y liblzma-dev
- name: Run Clippy
run: cargo clippy --all-targets --all-features
run: cargo clippy
- name: build default features
run: cargo build --all --verbose
- name: build default features -- examples
run: cargo build --examples --verbose
- name: test default features
run: cargo test --all --verbose
- name: build all features
run: cargo build --all-features --verbose
- name: build all features -- examples
run: cargo build --all-features --examples --verbose
- name: test all features
run: cargo test --all --all-features --verbose
- name: build
run: cargo build

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Cargo.lock generated

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@ -1,17 +1,28 @@
[workspace]
resolver = "2"
members = [
"crates/servicepoint",
"crates/servicepoint_binding_c",
"crates/servicepoint_binding_c/examples/lang_c",
"crates/servicepoint_binding_uniffi"
]
[workspace.package]
[package]
name = "servicepoint_binding_c"
version = "0.13.1"
publish = true
edition = "2021"
license = "GPL-3.0-or-later"
description = "C bindings for the servicepoint crate."
homepage = "https://docs.rs/crate/servicepoint_binding_c"
repository = "https://git.berlin.ccc.de/servicepoint/servicepoint"
readme = "README.md"
links = "servicepoint"
keywords = ["cccb", "cccb-servicepoint", "cbindgen"]
[workspace.lints.rust]
[lib]
crate-type = ["staticlib", "cdylib", "rlib"]
[build-dependencies]
cbindgen = "0.27.0"
[dependencies.servicepoint]
version = "0.13.1"
features = ["all_compressions"]
[lints.rust]
missing-docs = "warn"
[workspace.dependencies]
thiserror = "2.0"
[package.metadata.docs.rs]
all-features = true

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@ -1,49 +1,63 @@
# servicepoint
# servicepoint_binding_c
[![crates.io](https://img.shields.io/crates/v/servicepoint.svg)](https://crates.io/crates/servicepoint)
[![Crates.io Total Downloads](https://img.shields.io/crates/d/servicepoint)](https://crates.io/crates/servicepoint)
[![docs.rs](https://img.shields.io/docsrs/servicepoint)](https://docs.rs/servicepoint/latest/servicepoint/)
[![GPLv3 licensed](https://img.shields.io/crates/l/servicepoint)](./LICENSE)
[![crates.io](https://img.shields.io/crates/v/servicepoint_binding_c.svg)](https://crates.io/crates/servicepoint)
[![Crates.io Total Downloads](https://img.shields.io/crates/d/servicepoint_binding_c)](https://crates.io/crates/servicepoint)
[![docs.rs](https://img.shields.io/docsrs/servicepoint_binding_c)](https://docs.rs/servicepoint/latest/servicepoint/)
[![GPLv3 licensed](https://img.shields.io/crates/l/servicepoint_binding_c)](../LICENSE)
In [CCCB](https://berlin.ccc.de/), there is a big pixel matrix hanging on the wall. It is called "Service Point
Display" or "Airport Display".
This repository contains a library for parsing, encoding and sending packets to this display via UDP in multiple
programming languages.
In [CCCB](https://berlin.ccc.de/), there is a big pixel matrix hanging on the wall.
It is called "Service Point Display" or "Airport Display".
This project moved to [git.berlin.ccc.de/servicepoint/servicepoint](https://git.berlin.ccc.de/servicepoint/servicepoint).
The [GitHub repository](https://github.com/cccb/servicepoint) remains available as a mirror.
This crate contains C bindings for the `servicepoint` library, enabling users to parse, encode and send packets to this display via UDP.
Take a look at the contained crates for language specific information:
## Examples
| Crate | Languages | Readme |
|-----------------------------|-----------------------------------|-----------------------------------------------------------------------------|
| servicepoint | Rust | [servicepoint](crates/servicepoint/README.md) |
| servicepoint_binding_c | C / C++ | [servicepoint_binding_c](crates/servicepoint_binding_c/README.md) |
| servicepoint_binding_uniffi | C# / Python / Go / Kotlin / Swift | [servicepoint_binding_uniffi](crates/servicepoint_binding_uniffi/README.md) |
```c++
#include <stdio.h>
#include "servicepoint.h"
## Projects using the library
int main(void) {
SPConnection *connection = sp_connection_open("172.23.42.29:2342");
if (connection == NULL)
return 1;
- screen simulator (rust): [servicepoint-simulator](https://git.berlin.ccc.de/servicepoint/servicepoint-simulator)
- A bunch of projects (C): [arfst23/ServicePoint](https://github.com/arfst23/ServicePoint), including
- a CLI tool to display image files on the display or use the display as a TTY
- a BSD games robots clone
- a split-flap-display simulator
- animations that play on the display
- tanks game (C#): [servicepoint-tanks](https://github.com/kaesaecracker/cccb-tanks-cs)
- cellular automata slideshow (rust): [servicepoint-life](https://github.com/kaesaecracker/servicepoint-life)
- partial typescript implementation inspired by this library and browser stream: [cccb-servicepoint-browser](https://github.com/SamuelScheit/cccb-servicepoint-browser)
- a CLI: [servicepoint-cli](https://git.berlin.ccc.de/servicepoint/servicepoint-cli)
SPBitmap *pixels = sp_bitmap_new(SP_PIXEL_WIDTH, SP_PIXEL_HEIGHT);
sp_bitmap_fill(pixels, true);
To add yourself to the list, open a pull request.
SPCommand *command = sp_command_bitmap_linear_win(0, 0, pixels, Uncompressed);
while (sp_connection_send_command(connection, sp_command_clone(command)));
You can also check out [awesome-servicepoint](https://github.com/stars/kaesaecracker/lists/awesome-servicepoint) for a bigger collection of projects, including some not related to this library.
sp_command_free(command);
sp_connection_free(connection);
return 0;
}
```
If you have access, there is even more software linked in [the wiki](https://wiki.berlin.ccc.de/LED-Riesendisplay).
A full example including Makefile is available as part of this crate.
## Contributing
## Note on stability
See [CONTRIBUTING.md](CONTRIBUTING.md).
This library is still in early development.
You can absolutely use it, and it works, but expect minor breaking changes with every version bump.
Please specify the full version including patch in your Cargo.toml until 1.0 is released.
## What happened to servicepoint2?
## Installation
After `servicepoint2` has been merged into `servicepoint`, `servicepoint2` will not continue to get any updates.
Copy the header to your project and compile against.
You have the choice of linking statically (recommended) or dynamically.
- The C example shows how to link statically against the `staticlib` variant.
- When linked dynamically, you have to provide the `cdylib` at runtime in the _same_ version, as there are no API/ABI guarantees yet.
## Notes on differences to rust library
- function names are: `sp_` \<struct_name\> \<rust name\>.
- Instances get consumed in the same way they do when writing rust code. Do not use an instance after an (implicit!) free.
- Option<T> or Result<T, E> turn into nullable return values - check for NULL!
- There are no specifics for C++ here yet. You might get a nicer header when generating directly for C++, but it should be usable.
- Reading and writing to instances concurrently is not safe. Only reading concurrently is safe.
- documentation is included in the header and available [online](https://docs.rs/servicepoint_binding_c/latest/servicepoint_binding_c/)
## Everything else
Look at the main project [README](https://git.berlin.ccc.de/servicepoint/servicepoint/src/branch/main/README.md) for further information.

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build.rs Normal file
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//! Build script generating the header for the `servicepoint` C library.
//!
//! When the environment variable `SERVICEPOINT_HEADER_OUT` is set, the header is copied there from
//! the out directory. This can be used to use the build script as a command line tool from other
//! build tools.
use std::{env, fs::copy};
use cbindgen::{generate_with_config, Config};
fn main() {
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
println!("cargo::rerun-if-changed={crate_dir}");
let config =
Config::from_file(crate_dir.clone() + "/cbindgen.toml").unwrap();
let output_dir = env::var("OUT_DIR").unwrap();
let header_file = output_dir.clone() + "/servicepoint.h";
generate_with_config(crate_dir, config)
.unwrap()
.write_to_file(&header_file);
println!("cargo:include={output_dir}");
println!("cargo::rerun-if-env-changed=SERVICEPOINT_HEADER_OUT");
if let Ok(header_out) = env::var("SERVICEPOINT_HEADER_OUT") {
let header_copy = header_out + "/servicepoint.h";
println!("cargo:warning=Copying header to {header_copy}");
copy(header_file, &header_copy).unwrap();
println!("cargo::rerun-if-changed={header_copy}");
}
}

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language = "C"
include_version = true
cpp_compat = true
autogen_warning = "/* Warning, this file is autogenerated by cbindgen. Don't modify this manually. */"
############################ Code Style Options ################################
braces = "SameLine"
line_length = 80
tab_width = 4
documentation = true
documentation_style = "auto"
documentation_length = "full"
line_endings = "LF"
############################# Codegen Options ##################################
style = "type"
usize_is_size_t = true
# this is needed because otherwise the order in the C# bindings is different on different machines
sort_by = "Name"
[parse]
parse_deps = false
[parse.expand]
all_features = true
[export]
include = []
exclude = []
[enum]
rename_variants = "QualifiedScreamingSnakeCase"

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[package]
name = "servicepoint"
version.workspace = true
publish = true
edition = "2021"
license = "GPL-3.0-or-later"
description = "A rust library for the CCCB Service Point Display."
homepage = "https://docs.rs/crate/servicepoint"
repository = "https://git.berlin.ccc.de/servicepoint/servicepoint"
readme = "README.md"
keywords = ["cccb", "cccb-servicepoint"]
[lib]
crate-type = ["rlib"]
[dependencies]
log = "0.4"
bitvec = "1.0"
flate2 = { version = "1.0", optional = true }
bzip2 = { version = "0.5", optional = true }
zstd = { version = "0.13", optional = true }
rust-lzma = { version = "0.6", optional = true }
rand = { version = "0.8", optional = true }
tungstenite = { version = "0.26", optional = true }
once_cell = { version = "1.20", optional = true }
thiserror.workspace = true
[features]
default = ["compression_lzma", "protocol_udp", "cp437"]
compression_zlib = ["dep:flate2"]
compression_bzip2 = ["dep:bzip2"]
compression_lzma = ["dep:rust-lzma"]
compression_zstd = ["dep:zstd"]
all_compressions = ["compression_zlib", "compression_bzip2", "compression_lzma", "compression_zstd"]
rand = ["dep:rand"]
protocol_udp = []
protocol_websocket = ["dep:tungstenite"]
cp437 = ["dep:once_cell"]
[[example]]
name = "random_brightness"
required-features = ["rand"]
[[example]]
name = "game_of_life"
required-features = ["rand"]
[[example]]
name = "websocket"
required-features = ["protocol_websocket"]
[dev-dependencies]
# for examples
clap = { version = "4.5", features = ["derive"] }
[lints]
workspace = true
[package.metadata.docs.rs]
all-features = true

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# servicepoint
[![crates.io](https://img.shields.io/crates/v/servicepoint.svg)](https://crates.io/crates/servicepoint)
[![Crates.io Total Downloads](https://img.shields.io/crates/d/servicepoint)](https://crates.io/crates/servicepoint)
[![docs.rs](https://img.shields.io/docsrs/servicepoint)](https://docs.rs/servicepoint/latest/servicepoint/)
[![GPLv3 licensed](https://img.shields.io/crates/l/servicepoint)](../../LICENSE)
In [CCCB](https://berlin.ccc.de/), there is a big pixel matrix hanging on the wall. It is called "Service Point
Display" or "Airport Display".
This crate contains a library for parsing, encoding and sending packets to this display via UDP.
## Installation
```bash
cargo add servicepoint
```
or
```toml
[dependencies]
servicepoint = "0.13.1"
```
## Examples
```rust no_run
fn main() {
// establish connection
let connection = servicepoint::Connection::open("172.23.42.29:2342")
.expect("connection failed");
// clear screen content
connection.send(servicepoint::Command::Clear)
.expect("send failed");
}
```
More examples are available in the crate.
Execute `cargo run --example` for a list of available examples and `cargo run --example <name>` to run one.
## Note on stability
This library can be used for creative project or just to play around with the display.
A decent coverage by unit tests prevents major problems and I also test this with my own projects, which mostly use up-to-date versions.
That being said, the API is still being worked on.
Expect minor breaking changes with every version bump.
Please specify the full version including patch in your Cargo.toml until 1.0 is released.
## Features
This library has multiple optional dependencies.
You can choose to (not) include them by toggling the related features.
| Name | Default | Description |
|--------------------|---------|--------------------------------------------|
| compression_zlib | false | Enable additional compression algo |
| compression_bzip2 | false | Enable additional compression algo |
| compression_lzma | true | Enable additional compression algo |
| compression_zstd | false | Enable additional compression algo |
| protocol_udp | true | Connection::Udp |
| protocol_websocket | false | Connection::WebSocket |
| rand | false | impl Distribution<Brightness> for Standard |
| cp437 | true | Conversion to and from CP-437 |
## Everything else
Look at the main project [README](https://git.berlin.ccc.de/servicepoint/servicepoint/src/branch/main/README.md) for further information.

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//! An example for how to send text to the display.
use clap::Parser;
use servicepoint::*;
#[derive(Parser, Debug)]
struct Cli {
#[arg(
short,
long,
default_value = "localhost:2342",
help = "Address of the display"
)]
destination: String,
#[arg(short, long, num_args = 1.., value_delimiter = '\n',
help = "Text to send - specify multiple times for multiple lines")]
text: Vec<String>,
#[arg(
short,
long,
default_value_t = true,
help = "Clear screen before sending text"
)]
clear: bool,
}
/// example: `cargo run -- --text "Hallo" --text "CCCB"`
fn main() {
let mut cli = Cli::parse();
if cli.text.is_empty() {
cli.text.push("Hello, CCCB!".to_string());
}
let connection = Connection::open(&cli.destination)
.expect("could not connect to display");
if cli.clear {
connection
.send(Command::Clear)
.expect("sending clear failed");
}
let text = cli.text.join("\n");
let grid = CharGrid::wrap_str(TILE_WIDTH, &text);
connection
.send(Command::Utf8Data(Origin::ZERO, grid))
.expect("sending text failed");
}

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//! Show a brightness level test pattern on screen
use clap::Parser;
use servicepoint::*;
#[derive(Parser, Debug)]
struct Cli {
#[arg(short, long, default_value = "localhost:2342")]
destination: String,
}
fn main() {
let cli = Cli::parse();
let connection = Connection::open(cli.destination)
.expect("could not connect to display");
let mut pixels = Bitmap::max_sized();
pixels.fill(true);
let command = Command::BitmapLinearWin(
Origin::ZERO,
pixels,
CompressionCode::Uncompressed,
);
connection.send(command).expect("send failed");
let max_brightness: u8 = Brightness::MAX.into();
let mut brightnesses = BrightnessGrid::new(TILE_WIDTH, TILE_HEIGHT);
for (index, byte) in brightnesses.data_ref_mut().iter_mut().enumerate() {
let level = index as u8 % max_brightness;
*byte = Brightness::try_from(level).unwrap();
}
connection
.send(Command::CharBrightness(Origin::ZERO, brightnesses))
.expect("send failed");
}

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//! A simple game of life implementation to show how to render graphics to the display.
use clap::Parser;
use rand::{distributions, Rng};
use servicepoint::*;
use std::thread;
#[derive(Parser, Debug)]
struct Cli {
#[arg(short, long, default_value = "localhost:2342")]
destination: String,
#[arg(short, long, default_value_t = 0.5f64)]
probability: f64,
}
fn main() {
let cli = Cli::parse();
let connection = Connection::open(&cli.destination)
.expect("could not connect to display");
let mut field = make_random_field(cli.probability);
loop {
let command = Command::BitmapLinearWin(
Origin::ZERO,
field.clone(),
CompressionCode::Lzma,
);
connection.send(command).expect("could not send");
thread::sleep(FRAME_PACING);
field = iteration(field);
}
}
fn iteration(field: Bitmap) -> Bitmap {
let mut next = field.clone();
for x in 0..field.width() {
for y in 0..field.height() {
let old_state = field.get(x, y);
let neighbors = count_neighbors(&field, x as i32, y as i32);
let new_state = matches!(
(old_state, neighbors),
(true, 2) | (true, 3) | (false, 3)
);
next.set(x, y, new_state);
}
}
next
}
fn count_neighbors(field: &Bitmap, x: i32, y: i32) -> i32 {
let mut count = 0;
for nx in x - 1..=x + 1 {
for ny in y - 1..=y + 1 {
if nx == x && ny == y {
continue; // the cell itself does not count
}
if nx < 0
|| ny < 0
|| nx >= field.width() as i32
|| ny >= field.height() as i32
{
continue; // pixels outside the grid do not count
}
if !field.get(nx as usize, ny as usize) {
continue; // dead cells do not count
}
count += 1;
}
}
count
}
fn make_random_field(probability: f64) -> Bitmap {
let mut field = Bitmap::max_sized();
let mut rng = rand::thread_rng();
let d = distributions::Bernoulli::new(probability).unwrap();
for x in 0..field.width() {
for y in 0..field.height() {
field.set(x, y, rng.sample(d));
}
}
field
}

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//! A simple example for how to send pixel data to the display.
use clap::Parser;
use servicepoint::*;
use std::thread;
#[derive(Parser, Debug)]
struct Cli {
#[arg(short, long, default_value = "localhost:2342")]
destination: String,
}
fn main() {
let connection = Connection::open(Cli::parse().destination)
.expect("could not connect to display");
let mut pixels = Bitmap::max_sized();
for x_offset in 0..usize::MAX {
pixels.fill(false);
for y in 0..PIXEL_HEIGHT {
pixels.set((y + x_offset) % PIXEL_WIDTH, y, true);
}
let command = Command::BitmapLinearWin(
Origin::ZERO,
pixels.clone(),
CompressionCode::Lzma,
);
connection.send(command).expect("send failed");
thread::sleep(FRAME_PACING);
}
}

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//! A simple example for how to set brightnesses for tiles on the screen.
//! Continuously changes the tiles in a random window to random brightnesses.
use clap::Parser;
use rand::Rng;
use servicepoint::*;
use std::time::Duration;
#[derive(Parser, Debug)]
struct Cli {
#[arg(short, long, default_value = "localhost:2342")]
destination: String,
#[arg(short, long, default_value_t = true)]
enable_all: bool,
#[arg(short, long, default_value_t = 100, allow_negative_numbers = false)]
wait_ms: u64,
}
fn main() {
let cli = Cli::parse();
let connection = Connection::open(cli.destination)
.expect("could not connect to display");
let wait_duration = Duration::from_millis(cli.wait_ms);
// put all pixels in on state
if cli.enable_all {
let mut filled_grid = Bitmap::max_sized();
filled_grid.fill(true);
let command = Command::BitmapLinearWin(
Origin::ZERO,
filled_grid,
CompressionCode::Lzma,
);
connection.send(command).expect("send failed");
}
// set all pixels to the same random brightness
let mut rng = rand::thread_rng();
connection.send(Command::Brightness(rng.gen())).unwrap();
// continuously update random windows to new random brightness
loop {
let min_size = 1;
let x = rng.gen_range(0..TILE_WIDTH - min_size);
let y = rng.gen_range(0..TILE_HEIGHT - min_size);
let w = rng.gen_range(min_size..=TILE_WIDTH - x);
let h = rng.gen_range(min_size..=TILE_HEIGHT - y);
let origin = Origin::new(x, y);
let mut luma = BrightnessGrid::new(w, h);
for y in 0..h {
for x in 0..w {
luma.set(x, y, rng.gen());
}
}
connection
.send(Command::CharBrightness(origin, luma))
.unwrap();
std::thread::sleep(wait_duration);
}
}

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//! Example for how to use the WebSocket connection
use servicepoint::{
Bitmap, Command, CompressionCode, Connection, Grid, Origin,
};
fn main() {
let connection =
Connection::open_websocket("ws://localhost:8080".parse().unwrap())
.unwrap();
connection.send(Command::Clear).unwrap();
let mut pixels = Bitmap::max_sized();
pixels.fill(true);
connection
.send(Command::BitmapLinearWin(
Origin::ZERO,
pixels,
CompressionCode::Lzma,
))
.unwrap();
}

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//! An example on how to modify the image on screen without knowing the current content.
use clap::Parser;
use servicepoint::*;
use std::thread;
use std::time::Duration;
#[derive(Parser, Debug)]
struct Cli {
#[arg(short, long, default_value = "localhost:2342")]
destination: String,
#[arg(short, long = "duration-ms", default_value_t = 5000)]
time: u64,
}
fn main() {
let cli = Cli::parse();
let sleep_duration = Duration::max(
FRAME_PACING,
Duration::from_millis(cli.time / PIXEL_WIDTH as u64),
);
let connection = Connection::open(cli.destination)
.expect("could not connect to display");
let mut enabled_pixels = Bitmap::max_sized();
enabled_pixels.fill(true);
for x_offset in 0..PIXEL_WIDTH {
for y in 0..PIXEL_HEIGHT {
enabled_pixels.set(x_offset % PIXEL_WIDTH, y, false);
}
connection
.send(Command::BitmapLinearWin(
Origin::ZERO,
enabled_pixels.clone(),
CompressionCode::Lzma,
))
.expect("could not send command to display");
thread::sleep(sleep_duration);
}
}

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/// A byte-packed vector of booleans.
///
/// The implementation is provided by [bitvec].
/// This is an alias for the specific type of [bitvec::BitVec] used in this crate.
pub type BitVec = bitvec::BitVec<u8, bitvec::Msb0>;
pub mod bitvec {
//! Re-export of the used library [mod@bitvec].
pub use bitvec::prelude::*;
}

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@ -1,379 +0,0 @@
use crate::data_ref::DataRef;
use crate::BitVec;
use crate::*;
use ::bitvec::order::Msb0;
use ::bitvec::prelude::BitSlice;
use ::bitvec::slice::IterMut;
/// A fixed-size 2D grid of booleans.
///
/// The values are stored in packed bytes (8 values per byte) in the same order as used by the display for storing pixels.
/// This means that no conversion is necessary for sending the data to the display.
/// The downside is that the width has to be a multiple of 8.
///
/// # Examples
///
/// ```rust
/// use servicepoint::Bitmap;
/// let mut bitmap = Bitmap::new(8, 2);
///
/// ```
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Bitmap {
width: usize,
height: usize,
bit_vec: BitVec,
}
impl Bitmap {
/// Creates a new [Bitmap] with the specified dimensions.
///
/// # Arguments
///
/// - `width`: size in pixels in x-direction
/// - `height`: size in pixels in y-direction
///
/// returns: [Bitmap] initialized to all pixels off
///
/// # Panics
///
/// - when the width is not dividable by 8
pub fn new(width: usize, height: usize) -> Self {
assert_eq!(
width % 8,
0,
"width must be a multiple of 8, but is {width}"
);
Self {
width,
height,
bit_vec: BitVec::repeat(false, width * height),
}
}
/// Creates a new pixel grid with the size of the whole screen.
#[must_use]
pub fn max_sized() -> Self {
Self::new(PIXEL_WIDTH, PIXEL_HEIGHT)
}
/// Loads a [Bitmap] with the specified dimensions from the provided data.
///
/// # Arguments
///
/// - `width`: size in pixels in x-direction
/// - `height`: size in pixels in y-direction
///
/// returns: [Bitmap] that contains a copy of the provided data
///
/// # Panics
///
/// - when the dimensions and data size do not match exactly.
/// - when the width is not dividable by 8
#[must_use]
pub fn load(width: usize, height: usize, data: &[u8]) -> Self {
assert_eq!(width % 8, 0, "width must be a multiple of 8, but is {width}");
assert_eq!(data.len(), height * width / 8, "data length must match dimensions, with 8 pixels per byte.");
Self {
width,
height,
bit_vec: BitVec::from_slice(data),
}
}
/// Creates a [Bitmap] with the specified width from the provided [BitVec] without copying it.
///
/// returns: [Bitmap] that contains the provided data.
///
/// # Panics
///
/// - when the bitvec size is not dividable by the provided width
/// - when the width is not dividable by 8
#[must_use]
pub fn from_bitvec(width: usize, bit_vec: BitVec) -> Self {
assert_eq!(width % 8, 0, "width must be a multiple of 8, but is {width}");
let len = bit_vec.len();
let height = len / width;
assert_eq!(0, len % width, "dimension mismatch - len {len} is not dividable by {width}");
Self { width, height, bit_vec }
}
/// Iterate over all cells in [Bitmap].
///
/// Order is equivalent to the following loop:
/// ```
/// # use servicepoint::{Bitmap, Grid};
/// # let grid = Bitmap::new(8,2);
/// for y in 0..grid.height() {
/// for x in 0..grid.width() {
/// grid.get(x, y);
/// }
/// }
/// ```
pub fn iter(&self) -> impl Iterator<Item = &bool> {
self.bit_vec.iter().by_refs()
}
/// Iterate over all cells in [Bitmap] mutably.
///
/// Order is equivalent to the following loop:
/// ```
/// # use servicepoint::{Bitmap, Grid};
/// # let mut grid = Bitmap::new(8,2);
/// # let value = false;
/// for y in 0..grid.height() {
/// for x in 0..grid.width() {
/// grid.set(x, y, value);
/// }
/// }
/// ```
///
/// # Example
/// ```
/// # use servicepoint::{Bitmap, Grid};
/// # let mut grid = Bitmap::new(8,2);
/// # let value = false;
/// for (index, mut pixel) in grid.iter_mut().enumerate() {
/// pixel.set(index % 2 == 0)
/// }
/// ```
pub fn iter_mut(&mut self) -> IterMut<u8, Msb0> {
self.bit_vec.iter_mut()
}
/// Iterate over all rows in [Bitmap] top to bottom.
pub fn iter_rows(&self) -> IterRows {
IterRows {
bitmap: self,
row: 0,
}
}
}
impl Grid<bool> for Bitmap {
/// Sets the value of the specified position in the [Bitmap].
///
/// # Arguments
///
/// - `x` and `y`: position of the cell
/// - `value`: the value to write to the cell
///
/// returns: old value of the cell
///
/// # Panics
///
/// When accessing `x` or `y` out of bounds.
fn set(&mut self, x: usize, y: usize, value: bool) {
self.assert_in_bounds(x, y);
self.bit_vec.set(x + y * self.width, value)
}
fn get(&self, x: usize, y: usize) -> bool {
self.assert_in_bounds(x, y);
self.bit_vec[x + y * self.width]
}
/// Sets the state of all pixels in the [Bitmap].
///
/// # Arguments
///
/// - `this`: instance to write to
/// - `value`: the value to set all pixels to
fn fill(&mut self, value: bool) {
self.bit_vec.fill(value);
}
fn width(&self) -> usize {
self.width
}
fn height(&self) -> usize {
self.height
}
}
impl DataRef<u8> for Bitmap {
fn data_ref_mut(&mut self) -> &mut [u8] {
self.bit_vec.as_raw_mut_slice()
}
fn data_ref(&self) -> &[u8] {
self.bit_vec.as_raw_slice()
}
}
impl From<Bitmap> for Vec<u8> {
/// Turns a [Bitmap] into the underlying [`Vec<u8>`].
fn from(value: Bitmap) -> Self {
value.bit_vec.into()
}
}
impl From<Bitmap> for BitVec {
/// Turns a [Bitmap] into the underlying [BitVec].
fn from(value: Bitmap) -> Self {
value.bit_vec
}
}
impl From<&ValueGrid<bool>> for Bitmap {
/// Converts a grid of [bool]s into a [Bitmap].
///
/// # Panics
///
/// - when the width of `value` is not dividable by 8
fn from(value: &ValueGrid<bool>) -> Self {
let mut result = Self::new(value.width(), value.height());
for (mut to, from) in result.iter_mut().zip(value.iter()) {
*to = *from;
}
result
}
}
impl From<&Bitmap> for ValueGrid<bool> {
/// Converts a [Bitmap] into a grid of [bool]s.
fn from(value: &Bitmap) -> Self {
let mut result = Self::new(value.width(), value.height());
for (to, from) in result.iter_mut().zip(value.iter()) {
*to = *from;
}
result
}
}
pub struct IterRows<'t> {
bitmap: &'t Bitmap,
row: usize,
}
impl<'t> Iterator for IterRows<'t> {
type Item = &'t BitSlice<u8, Msb0>;
fn next(&mut self) -> Option<Self::Item> {
if self.row >= self.bitmap.height {
return None;
}
let start = self.row * self.bitmap.width;
let end = start + self.bitmap.width;
self.row += 1;
Some(&self.bitmap.bit_vec[start..end])
}
}
#[cfg(test)]
mod tests {
use crate::{BitVec, Bitmap, DataRef, Grid, ValueGrid};
#[test]
fn fill() {
let mut grid = Bitmap::new(8, 2);
assert_eq!(grid.data_ref(), [0x00, 0x00]);
grid.fill(true);
assert_eq!(grid.data_ref(), [0xFF, 0xFF]);
grid.fill(false);
assert_eq!(grid.data_ref(), [0x00, 0x00]);
}
#[test]
fn get_set() {
let mut grid = Bitmap::new(8, 2);
assert!(!grid.get(0, 0));
assert!(!grid.get(1, 1));
grid.set(5, 0, true);
grid.set(1, 1, true);
assert_eq!(grid.data_ref(), [0x04, 0x40]);
assert!(grid.get(5, 0));
assert!(grid.get(1, 1));
assert!(!grid.get(1, 0));
}
#[test]
fn load() {
let mut grid = Bitmap::new(8, 3);
for x in 0..grid.width {
for y in 0..grid.height {
grid.set(x, y, (x + y) % 2 == 0);
}
}
assert_eq!(grid.data_ref(), [0xAA, 0x55, 0xAA]);
let data: Vec<u8> = grid.into();
let grid = Bitmap::load(8, 3, &data);
assert_eq!(grid.data_ref(), [0xAA, 0x55, 0xAA]);
}
#[test]
#[should_panic]
fn out_of_bounds_x() {
let vec = Bitmap::new(8, 2);
vec.get(8, 1);
}
#[test]
#[should_panic]
fn out_of_bounds_y() {
let mut vec = Bitmap::new(8, 2);
vec.set(1, 2, false);
}
#[test]
fn iter() {
let grid = Bitmap::new(8, 2);
assert_eq!(16, grid.iter().count())
}
#[test]
fn iter_rows() {
let grid = Bitmap::load(8, 2, &[0x04, 0x40]);
let mut iter = grid.iter_rows();
assert_eq!(iter.next().unwrap().count_ones(), 1);
assert_eq!(iter.next().unwrap().count_ones(), 1);
assert_eq!(None, iter.next());
}
#[test]
fn iter_mut() {
let mut grid = Bitmap::new(8, 2);
for (index, mut pixel) in grid.iter_mut().enumerate() {
pixel.set(index % 2 == 0);
}
assert_eq!(grid.data_ref(), [0xAA, 0xAA]);
}
#[test]
fn data_ref_mut() {
let mut grid = Bitmap::new(8, 2);
let data = grid.data_ref_mut();
data[1] = 0x0F;
assert!(grid.get(7, 1));
}
#[test]
fn to_bitvec() {
let mut grid = Bitmap::new(8, 2);
grid.set(0, 0, true);
let bitvec: BitVec = grid.into();
assert_eq!(bitvec.as_raw_slice(), [0x80, 0x00]);
}
#[test]
fn from_bool_grid() {
let original = ValueGrid::load(
8,
1,
&[true, false, true, false, true, false, true, false],
);
let converted = Bitmap::from(&original);
let reconverted = ValueGrid::from(&converted);
assert_eq!(original, reconverted);
}
}

View file

@ -1,109 +0,0 @@
#[cfg(feature = "rand")]
use rand::{
distributions::{Distribution, Standard},
Rng,
};
/// A display brightness value, checked for correct value range
///
/// # Examples
///
/// ```
/// # use servicepoint::{Brightness, Command, Connection};
/// let b = Brightness::MAX;
/// let val: u8 = b.into();
///
/// let b = Brightness::try_from(7).unwrap();
/// # let connection = Connection::open("127.0.0.1:2342").unwrap();
/// let result = connection.send(Command::Brightness(b));
/// ```
#[derive(Debug, Copy, Clone, PartialEq, Eq, Ord, PartialOrd)]
pub struct Brightness(u8);
impl From<Brightness> for u8 {
fn from(brightness: Brightness) -> Self {
Self::from(&brightness)
}
}
impl From<&Brightness> for u8 {
fn from(brightness: &Brightness) -> Self {
brightness.0
}
}
impl TryFrom<u8> for Brightness {
type Error = u8;
fn try_from(value: u8) -> Result<Self, Self::Error> {
if value > Self::MAX.0 {
Err(value)
} else {
Ok(Brightness(value))
}
}
}
impl Brightness {
/// highest possible brightness value, 11
pub const MAX: Brightness = Brightness(11);
/// lowest possible brightness value, 0
pub const MIN: Brightness = Brightness(0);
/// Create a brightness value without returning an error for brightnesses above [Brightness::MAX].
///
/// returns: the specified value as a [Brightness], or [Brightness::MAX].
pub fn saturating_from(value: u8) -> Brightness {
if value > Brightness::MAX.into() {
Brightness::MAX
} else {
Brightness(value)
}
}
}
impl Default for Brightness {
fn default() -> Self {
Self::MAX
}
}
#[cfg(feature = "rand")]
impl Distribution<Brightness> for Standard {
fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Brightness {
Brightness(rng.gen_range(Brightness::MIN.0..=Brightness::MAX.0))
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn brightness_from_u8() {
assert_eq!(Err(100), Brightness::try_from(100));
assert_eq!(Ok(Brightness(1)), Brightness::try_from(1));
}
#[test]
#[cfg(feature = "rand")]
fn rand_brightness() {
let mut rng = rand::thread_rng();
for _ in 0..100 {
let _: Brightness = rng.gen();
}
}
#[test]
fn saturating_convert() {
assert_eq!(Brightness::MAX, Brightness::saturating_from(100));
assert_eq!(Brightness(5), Brightness::saturating_from(5));
}
#[test]
#[cfg(feature = "rand")]
fn test() {
let mut rng = rand::thread_rng();
assert_ne!(rng.gen::<Brightness>(), rng.gen());
}
}

View file

@ -1,93 +0,0 @@
use crate::brightness::Brightness;
use crate::grid::Grid;
use crate::value_grid::ValueGrid;
use crate::ByteGrid;
/// A grid containing brightness values.
///
/// # Examples
///
/// ```rust
/// # use servicepoint::{Brightness, BrightnessGrid, Command, Connection, Grid, Origin};
/// let mut grid = BrightnessGrid::new(2,2);
/// grid.set(0, 0, Brightness::MIN);
/// grid.set(1, 1, Brightness::MIN);
///
/// # let connection = Connection::open("127.0.0.1:2342").unwrap();
/// connection.send(Command::CharBrightness(Origin::new(3, 7), grid)).unwrap()
/// ```
pub type BrightnessGrid = ValueGrid<Brightness>;
impl BrightnessGrid {
/// Like [Self::load], but ignoring any out-of-range brightness values
pub fn saturating_load(width: usize, height: usize, data: &[u8]) -> Self {
ValueGrid::load(width, height, data).map(Brightness::saturating_from)
}
}
impl From<BrightnessGrid> for Vec<u8> {
fn from(value: BrightnessGrid) -> Self {
value
.iter()
.map(|brightness| (*brightness).into())
.collect()
}
}
impl From<&BrightnessGrid> for ByteGrid {
fn from(value: &BrightnessGrid) -> Self {
let u8s = value
.iter()
.map(|brightness| (*brightness).into())
.collect::<Vec<u8>>();
ValueGrid::load(value.width(), value.height(), &u8s)
}
}
impl TryFrom<ByteGrid> for BrightnessGrid {
type Error = u8;
fn try_from(value: ByteGrid) -> Result<Self, Self::Error> {
let brightnesses = value
.iter()
.map(|b| Brightness::try_from(*b))
.collect::<Result<Vec<_>, _>>()?;
Ok(BrightnessGrid::load(
value.width(),
value.height(),
&brightnesses,
))
}
}
#[cfg(test)]
mod tests {
use crate::value_grid::ValueGrid;
use crate::{Brightness, BrightnessGrid, DataRef, Grid};
#[test]
fn to_u8_grid() {
let mut grid = BrightnessGrid::new(2, 2);
grid.set(1, 0, Brightness::MIN);
grid.set(0, 1, Brightness::MAX);
let actual = ValueGrid::from(&grid);
assert_eq!(actual.data_ref(), &[11, 0, 11, 11]);
}
#[test]
fn saturating_load() {
assert_eq!(
BrightnessGrid::load(
2,
2,
&[
Brightness::MAX,
Brightness::MAX,
Brightness::MIN,
Brightness::MAX
]
),
BrightnessGrid::saturating_load(2, 2, &[255u8, 23, 0, 42])
);
}
}

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