No way to execute code after a resource has been loaded.

[cat-haines]

The following snippet demonstrates the problem:

(function() {
  var rocky = Rocky.bindCanvas(document.getElementById("pebble"));
  rocky.export_global_c_symbols();

  var bmp = rocky.gbitmap_create('http://github.com/apple-touch-icon-57x57.png');

  rocky.update_proc = function(ctx, bounds) {
    graphics_draw_bitmap_in_rect(ctx, bmp, [43, 55, 57, 57]);
  };

  rocky.mark_dirty();
})();

We call mark_dirty after setting up our app to initialize the view, however because the image hasn't loaded yet, it's not displayed. Because we're not calling rocky.mark_dirty() on a regular basis, the image is never redrawn.

[HBehrens]

Does bmp.onload = function(){rocky.mark_dirty();} ? I think we should finally implement the more user-friendly solution and always call .mark_dirty() after a resource was loaded.

[cat-haines]

I didn't realize created bitmaps had an onload property - this works great. We should make sure this is properly documented.

I'm not sure we would want to always call .mark_dirty() after loading a resource.. you might load a series of resources at app start, and not use them until later.

[cat-haines]

Closed and replaced with #69