Physfs problem

no-reply@allegro.cc (xtheunknown0) — Thu, 08 Dec 2011 11:53:14 +0000

Hello,

I've got a 'small' problem with trying to load an image file using physfs. Here's part of a modified ex_physfs.c:

#SelectExpand
  1#include 
  2#include 
  3#include 
  4#include 
  5#include 
  6#include 
  7#include 
  8#include 
  9
 10int main(int argc, const char *argv[])
 11{
 12   ALLEGRO_DISPLAY *display;
 13   ALLEGRO_BITMAP *bmp;
 14   ALLEGRO_FS_ENTRY *entry;
 15   int i;
 16
 17   if (!al_init())
 18      return 1;
 19   al_init_primitives_addon();
 20   al_init_font_addon();
 21   al_init_ttf_addon();
 22
 23   display = al_create_display(640, 480);
 24   if (!display) {
 25      return 1;
 26   }
 27
 28   al_init_image_addon();
 29
 30   ALLEGRO_PATH *path = al_get_standard_path(ALLEGRO_RESOURCES_PATH);
 31
 32   al_append_path_component(path, "resources");
 33   al_change_directory(al_path_cstr(path, '/'));  // change the working directory
 34   ALLEGRO_FONT *font = al_load_ttf_font("DejaVuSans.ttf", 12, 0); 
 35   if (!font) {
 36    al_draw_textf(font, al_map_rgb(255, 255, 255), 50, 1, 0, "Error loading font.\n");
 37      al_rest(4.0);
 38    return 1;
 39   }
 40   al_destroy_path(path);
 41
 42
 43   /* Set up PhysicsFS. */
 44   if (!PHYSFS_init(argv[0])) {
 45      al_draw_textf(font, al_map_rgb(255, 255, 255), 50, 1, 0, "Error initialising physicsfs");
 46      al_rest(4.0);
 47      return 1;
 48    }   
 49
 50   if (!PHYSFS_addToSearchPath("data/ex_physfs.zip", 1)) {
 51      al_draw_textf(font, al_map_rgb(255, 255, 255), 50, 50, 0, "Error adding to search path.");
 52      al_flip_display();
 53      al_rest(4.0);
 54      return 1;
 55    }   
 56
 57   return 0;
 58}

Why can't A5 find ex_physfs.zip even though it's the data/ is in the same directory as the executable produced?

TIA,
xtheunknown0

no-reply@allegro.cc (Matthew Leverton) — Thu, 08 Dec 2011 11:58:58 +0000

You've changed into the resources directory, so it's probably looking in resources/data.

no-reply@allegro.cc (xtheunknown0) — Fri, 09 Dec 2011 03:36:01 +0000

Now I've added
al_remove_path_component(path, -1);

before the addToSearchPath call, and it still doesn't work. What could I be missing?

TIA,
xtheunknown0

no-reply@allegro.cc (William Labbett) — Fri, 09 Dec 2011 04:12:49 +0000

xtheunknown0 said:

if (!PHYSFS_addToSearchPath("data/ex_physfs.zip", 1)) {

Are you supposed to have already set up a search path ? (if so, you haven't).

no-reply@allegro.cc (Edgar Reynaldo) — Fri, 09 Dec 2011 04:23:15 +0000

xtheunknown0 said:

Now I've added
al_remove_path_component(path, -1);before the addToSearchPath call, and it still doesn't work. What could I be missing?

Did you change the directory again? If not, it's still in resources/.

no-reply@allegro.cc (xtheunknown0) — Fri, 09 Dec 2011 06:22:59 +0000

Great.

Now A5 won't load the image file. Here's the rest of the code:

   bmp = al_load_bitmap("02.gif");
   if (bmp) {
      show_image(bmp);
      al_rest(4.0);
      al_destroy_bitmap(bmp);
   }   
   else {
      al_draw_textf(font, al_map_rgb(255, 255, 255), 50, 350, 0, "Error loading gif");
      al_flip_display();
      al_rest(4.0);
   }   

   PHYSFS_deinit();
   al_destroy_path(path);

BTW, addToSearchPath works (no need to create one).
This doesn't seem to be consistent with putting resources in a zip folder. Am I not understanding something?

no-reply@allegro.cc (Edgar Reynaldo) — Fri, 09 Dec 2011 08:37:58 +0000

I think (someone correct me if I'm wrong...) that you need to call al_set_physfs_file_interface, load your bitmap into an ALLEGRO_FILE* with al_fopen and then load your bitmap using al_load_bitmap_f. I'm not sure that al_load_bitmap respects the use of PHYSFS.