Hi again:
I have a question about saving bitmaps. I can save the backbuffer
with no problem. My question is how to save just the bitmap without
saving the complete backbuffer?

temp_image = al_create_bitmap(screen_width, working_screen_height);
al_set_target_bitmap(temp_image);
al_draw_bitmap(al_get_backbuffer(display), 0, 0, 0);

al_save_bitmap("sample.png", temp_image);

al_destroy_bitmap(temp_image);

This will save the complete backbuffer

Thanks for your time!

Hi Edgar:
Thanks for the tip. It seems my problem stems from the fact that
I do not know how to get the width and height of the rotated bitmap.
After rotation I use al_get bitmap_width and al_get_bitmap_height and
it returns the width and height of the original bitmap, not the rotated
one. If you could give me a hint on this I believe I could figure the
rest out on my own.

Thanks!

To get the rotated width and height you need a little trigonometry. I'll write it out when I get home.