feat: game loop, texture ownership, tick & draw with grid rendering

src/constants.rs

@@ -1,44 +1,95 @@
+use lazy_static::lazy_static;
+
 pub const BOARD_WIDTH: u32 = 28;
-pub const BOARD_HEIGHT: u32 = 36;
-pub const BLOCK_SIZE_24: u32 = 24;
-pub const BLOCK_SIZE_32: u32 = 32;
+pub const BOARD_HEIGHT: u32 = 37; // Adjusted to fit map texture?
+pub const CELL_SIZE: u32 = 24;
 
-pub const WINDOW_WIDTH: u32 = BLOCK_SIZE_24 * BOARD_WIDTH;
-pub const WINDOW_HEIGHT: u32 = BLOCK_SIZE_24 * BOARD_HEIGHT;
+pub const WINDOW_WIDTH: u32 = CELL_SIZE * BOARD_WIDTH;
+pub const WINDOW_HEIGHT: u32 = CELL_SIZE * BOARD_HEIGHT;
 
-pub const RAW_BOARD: &str = r###"
+#[derive(Debug, Copy, Clone, PartialEq)]
+pub enum MapTile {
+    Empty,
+    Wall,
+    Pellet,
+    PowerPellet,
+    StartingPosition(u8),
+}
 
+pub const RAW_BOARD: [&str; BOARD_HEIGHT as usize] = [
+    "                            ",
+    "                            ",
+    "                            ",
+    "############################",
+    "#............##............#",
+    "#.####.#####.##.#####.####.#",
+    "#o####.#####.##.#####.####o#",
+    "#.####.#####.##.#####.####.#",
+    "#..........................#",
+    "#.####.##.########.##.####.#",
+    "#.####.##.########.##.####.#",
+    "#......##....##....##......#",
+    "######.##### ## #####.######",
+    "     #.##### ## #####.#     ",
+    "     #.##    1     ##.#     ",
+    "     #.## ###==### ##.#     ",
+    "######.## #      # ##.######",
+    "      .   #2 3 4 #   .      ",
+    "######.## #      # ##.######",
+    "     #.## ######## ##.#     ",
+    "     #.##          ##.#     ",
+    "     #.## ######## ##.#     ",
+    "######.## ######## ##.######",
+    "#............##............#",
+    "#.####.#####.##.#####.####.#",
+    "#.####.#####.##.#####.####.#",
+    "#o..##.......0 .......##..o#",
+    "###.##.##.########.##.##.###",
+    "###.##.##.########.##.##.###",
+    "#......##....##....##......#",
+    "#.##########.##.##########.#",
+    "#.##########.##.##########.#",
+    "#..........................#",
+    "############################",
+    "                            ",
+    "                            ",
+    "                            ",
+];
 
-############################
-#............##............#
-#.####.#####.##.#####.####.#
-#o####.#####.##.#####.####o#
-#.####.#####.##.#####.####.#
-#..........................#
-#.####.##.########.##.####.#
-#.####.##.########.##.####.#
-#......##....##....##......#
-######.##### ## #####.######
-     #.##### ## #####.#
-     #.##    1     ##.#
-     #.## ###==### ##.#
-######.## #      # ##.######
-      .   #2 3 4 #   .
-######.## #      # ##.######
-     #.## ######## ##.#
-     #.##          ##.#
-     #.## ######## ##.#
-######.## ######## ##.######
-#............##............#
-#.####.#####.##.#####.####.#
-#.####.#####.##.#####.####.#
-#o..##.......0 .......##..o#
-###.##.##.########.##.##.###
-###.##.##.########.##.##.###
-#......##....##....##......#
-#.##########.##.##########.#
-#.##########.##.##########.#
-#..........................#
-############################
+lazy_static! {
+    pub static ref BOARD: [[MapTile; BOARD_HEIGHT as usize]; BOARD_HEIGHT as usize] = {
+        let mut board = [[MapTile::Empty; BOARD_HEIGHT as usize]; BOARD_HEIGHT as usize];
 
-                            "###;
+        for y in 0..BOARD_HEIGHT as usize {
+            let line = RAW_BOARD[y];
+
+            for x in 0..BOARD_WIDTH as usize {
+                if x >= line.len() {
+                    break;
+                }
+                
+                let i = (y * (BOARD_WIDTH as usize) + x) as usize;
+                let character = line
+                    .chars()
+                    .nth(x as usize)
+                    .unwrap_or_else(|| panic!("Could not get character at {} = ({}, {})", i, x, y));
+
+                let tile = match character {
+                    '#' => MapTile::Wall,
+                    '.' => MapTile::Pellet,
+                    'o' => MapTile::PowerPellet,
+                    ' ' => MapTile::Empty,
+                    c @ '0' | c @ '1' | c @ '2' | c @ '3' | c @ '4' => {
+                        MapTile::StartingPosition(c.to_digit(10).unwrap() as u8)
+                    },
+                    '=' => MapTile::Empty,
+                    _ => panic!("Unknown character in board: {}", character),
+                };
+
+                board[x as usize][y as usize] = tile;
+            }
+        }
+
+        board
+    };
+}

src/game.rs

@@ -1,11 +1,63 @@
-pub struct Game {}
+use sdl2::{pixels::Color, render::Canvas, video::Window};
 
-impl Game {
-    pub fn new() -> Game {
-        Game {}
+use crate::constants::{MapTile, BOARD, BOARD_HEIGHT, BOARD_WIDTH};
+use crate::pacman::Pacman;
+use crate::textures::TextureManager;
+
+pub struct Game<'a> {
+    pub textures: TextureManager<'a>,
+    canvas: &'a mut Canvas<Window>,
+    pacman: Pacman<'a>,
+    debug: bool,
+}
+
+impl Game<'_> {
+    pub fn new<'a>(
+        canvas: &'a mut Canvas<Window>,
+        texture_manager: TextureManager<'a>,
+    ) -> Game<'a> {
+        let pacman = Pacman::new(None, &texture_manager.pacman);
+
+        Game {
+            canvas,
+            textures: texture_manager,
+            pacman: pacman,
+            debug: true,
+        }
     }
 
-    pub fn tick() {}
+    pub fn tick(&mut self) {}
 
-    pub fn draw() {}
-}
+    pub fn draw(&mut self) {
+        // Clear the screen (black)
+        self.canvas.set_draw_color(Color::RGB(0, 0, 0));
+        self.canvas.clear();
+        
+        self.canvas
+            .copy(&self.textures.map, None, None)
+            .expect("Could not render texture on canvas");
+
+        // Draw a grid
+        for x in 0..BOARD_WIDTH {
+            for y in 0..BOARD_HEIGHT {
+                let tile = BOARD[x as usize][y as usize];
+                let color = match tile {
+                    MapTile::Empty => None,
+                    MapTile::Wall => Some(Color::BLUE),
+                    MapTile::Pellet => Some(Color::RED),
+                    MapTile::PowerPellet => Some(Color::MAGENTA),
+                    MapTile::StartingPosition(_) => Some(Color::GREEN),
+                };
+
+                if let Some(color) = color {
+                    self.canvas.set_draw_color(color);
+                    self.canvas
+                        .draw_rect(sdl2::rect::Rect::new(x as i32 * 24, y as i32 * 24, 24, 24))
+                        .expect("Could not draw rectangle");
+                }
+            }
+        }
+
+        self.canvas.present();
+    }
+}

src/textures.rs

@@ -0,0 +1,29 @@
+
+use sdl2::{
+    image::LoadTexture,
+    render::{Texture, TextureCreator},
+    video::WindowContext,
+};
+
+pub struct TextureManager<'a> {
+    pub map: Texture<'a>,
+    pub pacman: Texture<'a>,
+}
+
+impl<'a> TextureManager<'a> {
+    pub fn new(texture_creator: &'a TextureCreator<WindowContext>) -> Self {
+        let map_texture = texture_creator
+            .load_texture("assets/map.png")
+            .expect("Could not load pacman texture");
+        
+        let pacman_atlas = texture_creator
+            .load_texture("assets/pacman.png")
+            .expect("Could not load pacman texture");
+        
+        
+        TextureManager {
+            map: map_texture,
+            pacman: pacman_atlas,
+        }
+    }
+}