emerald 0.3.214

A lite, fully featured 2D game engine.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68

use crate::{asset_key::AssetKey, EmeraldError};

#[derive(Clone, Debug, Copy, Hash, Eq, PartialEq)]
pub enum SoundFormat {
    Ogg,
    Wav,
}

/// An instance of a sound playing. Use this id to pause, play, and resume this sound instance.
#[derive(Clone, Debug, Copy, Hash, Eq, PartialEq)]
pub struct SoundInstanceId(usize);
impl SoundInstanceId {
    pub(crate) fn new(id: usize) -> Self {
        SoundInstanceId(id)
    }
}

/// A key to sound data in the engine.
#[derive(Clone, Debug)]
pub struct SoundKey {
    pub(crate) asset_key: AssetKey,
    format: SoundFormat,
}
impl SoundKey {
    pub fn new(asset_key: AssetKey, format: SoundFormat) -> Self {
        SoundKey { asset_key, format }
    }
}

pub use sound_backend::*;

// Kira sound backend
#[cfg(feature = "audio")]
mod sound_backend {
    use crate::audio::sound::*;

    #[derive(Clone)]
    pub struct Sound {
        pub(crate) inner: kira::sound::Sound,
    }
    impl Sound {
        pub(crate) fn new(bytes: Vec<u8>, format: SoundFormat) -> Result<Self, EmeraldError> {
            let reader = std::io::Cursor::new(bytes);
            let settings = kira::sound::SoundSettings::new();

            let inner = match format {
                SoundFormat::Ogg => kira::sound::Sound::from_ogg_reader(reader, settings),
                SoundFormat::Wav => kira::sound::Sound::from_wav_reader(reader, settings),
            }?;

            Ok(Sound { inner })
        }
    }
}

// Dummy sound backend
#[cfg(not(feature = "audio"))]
mod sound_backend {
    use crate::audio::sound::*;

    #[derive(Clone)]
    pub struct Sound {}
    impl Sound {
        pub(crate) fn new(_bytes: Vec<u8>, _format: SoundFormat) -> Result<Self, EmeraldError> {
            Ok(Sound {})
        }
    }
}