-use crate::Image;

-

-#[cfg(feature = "real-show")]

-mod real {

- use crate::Image;

- use minifb::{Key, Window};

-

- pub fn show<const CHANNELS: usize>(i: Image<&[u8], CHANNELS>)

- where

- [u8; CHANNELS]: crate::Pack,

- {

- let mut win = Window::new(

- "show",

- i.width() as usize,

- i.height() as usize,

- Default::default(),

- )

- .unwrap();

- win.set_title("image viewer");

- let font = fontdue::Font::from_bytes(

- &include_bytes!("../data/CascadiaCode.ttf")[..],

- fontdue::FontSettings {

- scale: 12.0,

- ..Default::default()

- },

- )

- .unwrap();

- while win.is_open() && !win.is_key_down(Key::Q) && !win.is_key_down(Key::Escape) {

- let mut buf = Image::<Box<[u32]>, 1>::from(i.as_ref());

-

- if !win.is_key_down(Key::H)

- && let Some((x, y)) = win

- .get_mouse_pos(minifb::MouseMode::Discard)

- .map(|(x, y)| (x.round() as u32, y.round() as u32))

- .map(|(x, y)| (x.min(i.width()), y.min(i.height())))

- {

- // SAFETY: ctor

- let pix = unsafe { i.pixel(x, y) };

- unsafe { Image::new(buf.width, buf.height, &mut *buf.buffer) }.text(

- 5,

- i.height() - 20,

- 12.0,

- &font,

- &format!(

- "P ({x}, {y}), {}",

- // SAFETY: clampd

- match &pix[..] {

- [y] => format!("(Y {y})"),

- [y, a] => format!("(Y {y} A {a})"),

- [r, g, b] => format!("(R {r} G {g} B {b})"),

- [r, g, b, a] => format!("(R {r} G {g} B {b} A {a})"),

- _ => unreachable!(),

- }

- ),

- [238, 232, 213, 255],

- )

- }

- win.update_with_buffer(&buf.buffer, i.width() as usize, i.height() as usize)

- .expect("window update fail");

- }

- }

-}

-

-#[cfg(not(feature = "real-show"))]

-mod fake {

- use std::process::{Command, Stdio};

-

- macro_rules! c {

- ($p:literal) => {

- std::process::Command::new($p)

- };

- ($p:literal $($args:expr)+) => {

- std::process::Command::new($p).args([$($args,)+])

- }

- }

- pub(crate) use c;

-

- pub fn has(c: &'static str) -> bool {

- complete(c!("which").arg(c))

- }

-

- pub fn complete(c: &mut Command) -> bool {

- c.stdout(Stdio::null())

- .stderr(Stdio::null())

- .status()

- .expect("ok")

- .success()

- }

-

- macro_rules! show {

- ($me:expr) => {

- let file = std::env::temp_dir().join("viewing.png");

- $me.save(&file);

- #[cfg(target_family = "windows")]

- assert!(fake::complete(fake::c!("start" "%Temp%/viewing.png")), "command should complete successfully.");

- #[cfg(target_family = "unix")]

- assert!(

- if fake::has("feh") { fake::complete(fake::c!("feh" file))

- } else if fake::has("xdg-open") { fake::complete(fake::c!("xdg-open" file))

- } else if fake::has("gio") { fake::complete(fake::c!("gio" file))

- } else if fake::has("gnome-open") { fake::complete(fake::c!("gnome-open" file))

- } else if fake::has("kde-open") { fake::complete(fake::c!("kde-open" file))

- } else if fake::has("open") { fake::complete(fake::c!("open" file))

- } else { panic!("no image viewer found, please enable the `real-show` feature.") },

- "command should complete successfully.");

- };

-

- }

- pub(crate) use show;

-}

-

-fn r(i: &Image<Box<[u32]>, 1>) -> Image<&[u32], 1> {

- // SAFETY: ctor

- unsafe { Image::new(i.width, i.height, &*i.buffer) }

-}

-

-macro_rules! show {

- ($buf:ty) => {

- show!($buf, 1);

- show!($buf, 2);

- show!($buf, 3);

- show!($buf, 4);

- };

- ($buf:ty, $n:literal) => {

- impl Image<$buf, $n> {

- /// Open a window showing this image.

- /// Blocks until the window finishes.

- ///

- /// This is like [`dbg!`] for images.

- ///

- /// # Panics

- ///

- /// if the window is un creatable

- pub fn show(self) -> Self {

- #[cfg(feature = "real-show")]

- real::show(self.as_ref());

- #[cfg(not(feature = "real-show"))]

- fake::show!(self);

- self

- }

- }

- };

-}

-

-show!(Vec<u8>);

-show!(Box<[u8]>);

-show!(&[u8]);

-

-impl Image<Box<[u32]>, 1> {

- /// Open a window showing this image.

- /// Blocks until the window finishes.

- ///

- /// This is like [`dbg!`] for images.

- ///

- /// # Panics

- ///

- /// if the window is un creatable

- pub fn show(self) -> Self {

- #[cfg(feature = "real-show")]

- real::show(Image::<Box<[u8]>, 4>::from(r(&self)).as_ref());

- #[cfg(not(feature = "real-show"))]

- fake::show!(Image::<Box<[u8]>, 4>::from(r(&self)));

- self

- }

-}