I'm seeing intermittent issues when loading and rendering PNG files via the iPhone port. Occasionally the images will load fine, other times I'll witness graphical distortion. I made a test case. All I need to do is run this a few times via the simulator to see a number of artifacts. Some are shown here:
{"name":"600727","src":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/b\/0\/b070017ef2663d1ccb5e82ded96f99eb.jpg","w":300,"h":300,"tn":"\/\/djungxnpq2nug.cloudfront.net\/image\/cache\/b\/0\/b070017ef2663d1ccb5e82ded96f99eb"}
Here's the code used when seeing the above artifacts. I've also attached the png files in question.
1int main(void)
2{
3 al_init();
4
5 // Setup display
6 ALLEGRO_DISPLAY *display = al_create_display(480, 320);
7 if (!display) {
8 printf("Error creating display.\n");
9 return 1;
10 }
11
12 al_init_image_addon();
13
14 ALLEGRO_TIMER *timer = al_install_timer(1.0 / 60);
15 ALLEGRO_EVENT_QUEUE *queue = al_create_event_queue();
16 al_register_event_source(queue, al_get_display_event_source(display));
17 al_register_event_source(queue, al_get_timer_event_source(timer));
18 al_start_timer(timer);
19
20 ALLEGRO_BITMAP *t1 = al_load_bitmap("walk.png");
21 ALLEGRO_BITMAP *t2 = al_load_bitmap("run.png");
22
23 bool needRender = false;
24
25 ALLEGRO_EVENT event;
26
27 while (1) {
28 al_wait_for_event(queue, &event);
29
30 switch(event.type) {
31 case ALLEGRO_EVENT_TIMER:
32 needRender = true;
33 break;
34 case ALLEGRO_EVENT_DISPLAY_CLOSE:
35 break;
36 }
37
38 if (needRender && al_event_queue_is_empty(queue)) {
39 al_draw_bitmap(t1, 0, 0, 0);
40 al_draw_bitmap(t2, 0, 25, 0);
41 al_flip_display();
42 needRender = false;
43 }
44 }
45
46 return 0;
47}
I'm not sure if this is a genuine issue, or a mistake on my part.
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