You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: camera.rs
    path of file: ./repos/rustrogueliketutorial/chapter-64-curses/src
    
    the code of the file until where you have to start completion: use specs::prelude::*;
use super::{Map,Position,Renderable,Hidden};
use rltk::{Point, Rltk, RGB};
use crate::map::tile_glyph;

pub fn get_screen_bounds(ecs: &World, _ctx:  &mut Rltk) -> (i32, i32, i32, i32) {
    let player_pos = ecs.fetch::<Point>();
    //let (x_chars, y_chars) = ctx.get_char_size();
    let (x_chars, y_chars) = (48, 44);

    let center_x = (x_chars / 2) as i32;
    let center_y = (y_chars / 2) as i32;

    let min_x = player_pos.x - center_x;
    let max_x = min_x + x_chars as i32;
    let min_y = player_pos
    
pub fn render_debug_map(map : &Map, ctx : &mut Rltk) {
    let player_pos = Point::new(map.width / 2, map.height / 2);
    let (x_chars, y_chars) = ctx.get_char_size();

    let center_x = (x_chars / 2) as i32;
    let center_y = (y_chars / 2) as i32;

    let min_x = player_pos.x - center_x;
    let max_x = min_x + x_chars as i32;
    let min_y = player_pos.y - center_y;
    let max_y = min_y + y_chars as i32;

    let map_width = map.width-1;
    let map_height = map.height-1;

    for (y,ty) in (min_y .. max_y).enumerate() {
        for (x,tx) in (min_x .. max_x).enumerate() {
            if tx > 0 && tx < map_width && ty > 0 && ty < map_height {
                let idx = map.xy_idx(tx, ty);
                if map.revealed_tiles[idx] {
                    let (glyph, fg, bg) = tile_glyph(idx, &*map);
                    ctx.set(x as i32, y as i32, fg, bg, glyph);
                }
            } else if SHOW_BOUNDARIES {
                ctx.set(x as i32, y as i32, RGB::named(rltk::GRAY), RGB::named(rltk::BLACK), rltk::to_cp437('·'));
            }
        }
    }
}