romy_engine/
lib.rs

1use image::GenericImageView;
2use romy_core::output::*;
3
4/// Decode a .png, returning a Image
5pub fn decode_png(data: &[u8]) -> Image {
6    let image = image::load_from_memory(data).unwrap();
7    let rah = image.to_rgba().into_raw();
8    Image::from_data(
9        image.dimensions().0 as i32,
10        image.dimensions().1 as i32,
11        &rah,
12    )
13}
14
15pub trait ImageEngine {
16    fn is_inside(&self, x: i32, y: i32) -> bool;
17    fn blit(&mut self, x: i32, y: i32, image: &Image);
18}
19
20impl ImageEngine for Image {
21    fn is_inside(&self, x: i32, y: i32) -> bool {
22        x >= 0 && x < self.width() && y >= 0 && y < self.height()
23    }
24
25    fn blit(&mut self, x: i32, y: i32, image: &Image) {
26        for image_x in 0..image.width() {
27            for image_y in 0..image.height() {
28                let to_x = x + image_x;
29                let to_y = y + image_y;
30                if !self.is_inside(to_x, to_y) {
31                    continue;
32                }
33                let color = image.get_pixel(image_x, image_y);
34                if color.alpha() <= 0.0 {
35                    continue;
36                }
37                self.set_pixel(to_x, to_y, color);
38            }
39        }
40    }
41}
42
43// Decode a .ogg file, retuning a sound for each channel
44pub fn decode_ogg(data: &[u8]) -> Vec<Sound> {
45    let cursor = std::io::Cursor::new(data);
46    let mut srr = lewton::inside_ogg::OggStreamReader::new(cursor).unwrap();
47    let channels = srr.ident_hdr.audio_channels;
48    let sample_rate = srr.ident_hdr.audio_sample_rate;
49
50    let mut samples = Vec::with_capacity(channels as usize);
51    for _ in 0..channels {
52        samples.push(Vec::new());
53    }
54
55    while let Some(pck_samples) = srr.read_dec_packet().unwrap() {
56        for (channel, element) in pck_samples.iter().enumerate() {
57            for element in element {
58                let frac = f32::from(*element) / f32::from(std::i16::MAX);
59                samples[channel].push(frac);
60            }
61        }
62    }
63
64    let mut sounds = Vec::with_capacity(channels as usize);
65    for s in samples {
66        sounds.push(Sound::from_data(sample_rate as i32, &s));
67    }
68
69    sounds
70}
romy_engine/lib.rs

romy_engine/
lib.rs
