Loading a game map from a image file.

load_game_map_from_image.py

import pygame


class GameMap:
    def __init__(self, path, tile_map_def):
        self.map_surf = pygame.image.load(path)
        self.tile_map_def = tile_map_def
        self.map_data = self.load_map_image_from_surface()
        self.width = self.map_surf.get_width()
        self.height = self.map_surf.get_height()

    def load_map_image_from_surface(self):
        return [
            self.color_to_tile(self.map_surf.get_at((x, y)))
            for y in range(self.map_surf.get_height())
            for x in range(self.map_surf.get_width())
        ]

    def color_to_tile(self, color):
        r, g, b = color.r, color.g, color.b
        return self.tile_map_def.get(f'{r},{g},{b}', ' ')

    def get_tile(self, x, y):
        return self.map_data[(y * self.height) + x]


# setup the keys that should map to a value which will later be used
# to get the surface to be blitted to the screen. Generally, this
# should be an integer tile id.
#
# key should be an rgb value
# value should be the tile id.
tile_map_def = {
    '160,91,83': '0',
    '122,68,74': 'O',
    '94,54,67': 'o',
    '71,45,60': '.'
}

game_map = GameMap('./dirt.png', tile_map_def)

for y in range(game_map.height):
    for x in range(game_map.width):
        print(game_map.get_tile(x, y), end=' ')
    print()