1 files changed, 62 insertions, 0 deletions
diff --git a/crates/renderer/src/background.rs b/crates/renderer/src/background.rs
new file mode 100644
index 0000000..cf99fc9
--- /dev/null
+++ b/crates/renderer/src/background.rs
@@ -0,0 +1,62 @@
+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);
+        }
+    }
+}