Hi there.
I just recently switched to Linux and am having some issues running some code that has Allegro 5 in it. Below is my code.
1#include <allegro5/allegro.h>
2#include <allegro5/allegro_image.h>
3
4int main() {
5
6 al_init();
7
8 enum KEYS {UP, DOWN, LEFT, RIGHT};
9
10 int screenW = 640;
11 int screenH = 480;
12
13 int playerX, playerY = 0;
14
15 bool done, draw = false;
16
17 al_set_new_display_flags(ALLEGRO_WINDOWED);
18
19 ALLEGRO_DISPLAY *display = al_create_display(screenW, screenH);
20 ALLEGRO_EVENT_QUEUE *event_queue = al_create_event_queue();
21 ALLEGRO_TIMER *timer = al_create_timer(1.0 / 60.0);
22
23 al_set_window_title(display, "Test Title");
24
25 al_init_image_addon();
26 al_install_keyboard();
27 al_install_mouse();
28
29 ALLEGRO_BITMAP *object = al_load_bitmap("./object.png");
30
31 al_register_event_source(event_queue, al_get_display_event_source(display));
32 al_register_event_source(event_queue, al_get_timer_event_source(timer));
33 al_register_event_source(event_queue, al_get_keyboard_event_source());
34
35 al_start_timer(timer);
36
37 while (!done) {
38
39 ALLEGRO_EVENT ev;
40
41 al_wait_for_event(event_queue, &ev);
42
43 if (ev.type == ALLEGRO_EVENT_TIMER) {
44
45 // Update
46
47 draw = true;
48 }
49 else if (ev.type == ALLEGRO_EVENT_KEY_DOWN) {
50
51 }
52 else if (ev.type == ALLEGRO_EVENT_KEY_UP) {
53
54 switch (ev.keyboard.keycode) {
55
56 case ALLEGRO_KEY_ESCAPE:
57
58 // Quit the game
59 done = true;
60 break;
61 }
62 }
63 else if (ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
64
65 // Quit the game
66 done = true;
67 }
68
69 if (draw && al_is_event_queue_empty(event_queue)) {
70
71 // Draw
72
73 draw = false;
74
75 al_draw_bitmap(object, 0, 0, 0);
76
77 al_flip_display();
78 al_clear_to_color(al_map_rgb(255, 0, 0));
79 }
80 }
81
82 al_destroy_timer(timer);
83 al_destroy_display(display);
84 al_destroy_event_queue(event_queue);
85 al_destroy_bitmap(object);
86
87 return 0;
88}
I compile the file as such: "g++ -o mygame game.cpp $(pkg-config --libs allegro-5 allegro_image-5)". It compiles without error. When I go to run my game (./mygame), it returns... "mygame: /home/pi/Desktop/allegro/src/bitmap_draw.c:137: al_draw_tinted_bitmap: Assertion `bitmap' failed."
I'm guessing it means that I am pointing to a NULL bitmap, but I'm not! 
My "object.png" resides on my desktop just as "game.cpp" does. Any ideas?
