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use teleia::*;
use byteorder::ReadBytesExt;
use glow::HasContext;
pub struct Frame<'a> {
tag: &'a [u8],
width: u32,
height: u32,
pixels: &'a [u8],
}
impl<'a> Frame<'a> {
fn read_length_prefixed(reader: &mut &'a [u8]) -> Option<&'a [u8]> {
let len = reader.read_u32::<byteorder::LE>().ok()? as usize;
// log::info!("len: {}", len);
let (x, xs) = reader.split_at(len);
*reader = xs;
Some(x)
}
pub fn parse(reader: &mut &'a [u8]) -> Option<Self> {
// log::info!("message: {:?}", reader);
let tag = Self::read_length_prefixed(reader)?;
// log::info!("tag: {:?}", tag);
let width = reader.read_u32::<byteorder::LE>().ok()?;
// log::info!("width: {:?}", width);
let height = reader.read_u32::<byteorder::LE>().ok()?;
// log::info!("height: {:?}", height);
let pixels = *reader;
Some(Self { tag, width, height, pixels })
}
}
pub struct Backgrounds {
pub drawing: texture::Texture,
}
impl Backgrounds {
pub fn new(ctx: &context::Context) -> Self {
Self {
// drawing: texture::Texture::new_empty(ctx),
drawing: texture::Texture::new(ctx, include_bytes!("assets/textures/everest.jpg")),
}
}
pub fn update<'a>(&self, ctx: &context::Context, f: Frame<'a>) {
unsafe {
let err = ctx.gl.get_error();
self.drawing.bind(ctx);
ctx.gl.tex_image_2d(
glow::TEXTURE_2D,
0,
glow::RGBA as i32,
f.width as i32,
f.height as i32,
0,
glow::RGBA,
glow::UNSIGNED_BYTE,
Some(&f.pixels),
);
ctx.gl.generate_mipmap(glow::TEXTURE_2D);
}
}
}
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