Method write_framebuffer

examples/doom/src/runtime.rs:68–77

(&mut self, dst: &mut [u32])

    }

    pub fn write_framebuffer(&mut self, dst: &mut [u32]) -> Result<()> {
        let ptr = self.framebuffer.call(&mut self.store, ())? as usize;
        self.memory.read_exact(&self.store, ptr, &mut self.framebuffer_bytes)?;
        for (index, pixel) in dst.iter_mut().enumerate() {
            let byte_index = index * 4;
            let chunk = &self.framebuffer_bytes[byte_index..byte_index + 4];
            *pixel = ((chunk[0] as u32) << 16) | ((chunk[1] as u32) << 8) | chunk[2] as u32;
        }
        Ok(())
    }

    pub fn key_down(&mut self, key: i32) -> Result<()> {
        self.key_down.call(&mut self.store, key)?;