rototiller,fb: swap dispatch with page flipping

For the sake of sdl_fb, move page flipping into the main thread
and run module render dispatch from another thread instead.

This eliminates the fb flipper thread, moving its functionality
into fb_flip() which synchronously consumes and performs a single
flip from the same queue as before - the function is verbatim
the loop body of the flipper thread.

Now main() calls fb_flip() in a loop where it previously dispatched
pages for rendering.

Rendering dispatch is now performed in a created thread.

See the comment in fb.c for more explanation of this shuffle.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/fb.h b/src/fb.h
index 7743b82..f9d0b77 100644
--- a/src/fb.h
+++ b/src/fb.h
@@ -47,6 +47,7 @@ void fb_page_put(fb_t *fb, fb_page_t *page);
 void fb_free(fb_t *fb);
 void fb_get_put_pages_count(fb_t *fb, unsigned *count);
 fb_t * fb_new(const fb_ops_t *ops, settings_t *settings, int n_pages);
+int fb_flip(fb_t *fb);
 void fb_fragment_divide(fb_fragment_t *fragment, unsigned n_fragments, fb_fragment_t fragments[]);
 int fb_fragment_slice_single(const fb_fragment_t *fragment, unsigned n_fragments, unsigned num, fb_fragment_t *res_fragment);
 int fb_fragment_tile_single(const fb_fragment_t *fragment, unsigned tile_size, unsigned num, fb_fragment_t *res_fragment);