/**
* Allocate and map a single page, for a mono image.
*/
void dmd_alloc_low (void)
{
if (0) {
dmd_pagenum_t page = dmd_alloc ();
pinio_dmd_window_set (PINIO_DMD_WINDOW_0, page);
pinio_dmd_window_set (PINIO_DMD_WINDOW_1, page);
}
dmd_alloc_pair ();
}
/**
* Do a DMD transition.
*
* Transitions are complicated because the old/new images may have
* different color depths (mono or 4-color). Also, we can only map
* two pages at a time, but there may be up to 4 different pages
* involved.
*
* First, we check to see if both old and new images are mono. If so,
* then the transition can be optimized slightly.
*
* For debugging transitions, define STEP_TRANSITION. The transition
* will take place one frame at a time; use the launch button to
* step through each frame.
*/
void dmd_do_transition (void)
{
const U8 new_dark_page = dmd_low_page;
const U8 new_bright_page = dmd_high_page;
dmd_trans_data_ptr = NULL;
dmd_trans_data_ptr2 = NULL;
page_push (TRANS_PAGE);
if (dmd_transition->composite_init)
{
(*dmd_transition->composite_init) ();
dmd_trans_data_ptr2 = dmd_trans_data_ptr;
}
while (dmd_in_transition)
{
#if defined(STEP_TRANSITION) && defined(MACHINE_LAUNCH_SWITCH)
while (!switch_poll (MACHINE_LAUNCH_SWITCH))
task_sleep (TIME_33MS);
task_sleep (TIME_100MS);
while (switch_poll (MACHINE_LAUNCH_SWITCH))
task_sleep (TIME_33MS);
#else
task_sleep (dmd_transition->delay);
#endif
do {
dmd_composite_page = dmd_alloc ();
} while ((dmd_composite_page == (new_dark_page & ~1)) ||
(dmd_composite_page == (new_bright_page & ~1)));
/* Handle the transition of the dark page first.
* Use the lower composite pair page. */
pinio_dmd_window_set (PINIO_DMD_WINDOW_1, dmd_composite_page);
dmd_do_transition_cycle (dmd_dark_page, new_dark_page);
/* Handle the transition of the bright page.
* Use the upper composite pair page (+1). */
{
U8 *tmp_trans_data_ptr;
tmp_trans_data_ptr = dmd_trans_data_ptr;
dmd_trans_data_ptr = dmd_trans_data_ptr2;
pinio_dmd_window_set (PINIO_DMD_WINDOW_1, dmd_composite_page+1);
dmd_do_transition_cycle (dmd_bright_page, new_bright_page);
dmd_trans_data_ptr2 = dmd_trans_data_ptr;
dmd_trans_data_ptr = tmp_trans_data_ptr;
}
/* Make the composite pages visible */
dmd_dark_page = dmd_composite_page;
dmd_bright_page = dmd_composite_page+1;
}
page_pop ();
dmd_transition = NULL;
}
/**
* Allocate and map two different pages.
*/
void dmd_alloc_pair (void)
{
wpc_dmd_set_low_page (dmd_alloc ());
wpc_dmd_set_high_page (wpc_dmd_get_low_page () + 1);
}
/**
* Allocate and map two different, consecutive pages.
*/
void dmd_alloc_pair (void)
{
dmd_pagenum_t page = dmd_alloc ();
dmd_map_low_high (page);
}
/** Allocate and map a single page, into the 'high' region. */
void dmd_alloc_high (void)
{
wpc_dmd_set_high_page (dmd_alloc ());
}