/*! \brief Tests a if a given OBJECT was hit at a given set of coordinates
*
* \par Function Description
* Tests a if a given OBJECT was hit at a given set of coordinates. If an
* object is not selectable (e.g. it is locked), or it is invisible and
* not being rendered, this function will return FALSE.
*
* \param [in] w_current The GschemToplevel object.
* \param [in] object The OBJECT being hit-tested.
* \param [in] w_x The X coordinate to test (in world coords).
* \param [in] w_y The Y coordinate to test (in world coords).
* \param [in] w_slack The slack applied to the hit-test.
*
* \returns TRUE if the OBJECT was hit, otherwise FALSE.
*/
static gboolean
is_object_hit (GschemToplevel *w_current, OBJECT *object,
int w_x, int w_y, int w_slack)
{
int left, top, right, bottom;
if (!object->selectable)
return FALSE;
/* We can't hit invisible (text) objects unless show_hidden_text is active.
*/
if (!o_is_visible (object) && !w_current->toplevel->show_hidden_text)
return FALSE;
/* Do a coarse test first to avoid computing distances for objects ouside
* of the hit range.
*/
if (!world_get_single_object_bounds(w_current->toplevel, object,
&left, &top, &right, &bottom) ||
!inside_region (left - w_slack, top - w_slack,
right + w_slack, bottom + w_slack,
w_x, w_y))
return FALSE;
return (o_shortest_distance (w_current->toplevel, object, w_x, w_y) < w_slack);
}
static errval_t do_single_modify_flags(struct pmap_arm *pmap, genvaddr_t vaddr,
size_t pages, vregion_flags_t flags)
{
errval_t err = SYS_ERR_OK;
struct vnode *ptable = find_ptable(pmap, vaddr);
uint16_t ptentry = ARM_USER_L2_OFFSET(vaddr);
if (ptable) {
struct vnode *page = find_vnode(ptable, ptentry);
if (page) {
if (inside_region(ptable, ptentry, pages)) {
// we're modifying part of a valid mapped region
// arguments to invocation: invoke frame cap, first affected
// page (as offset from first page in mapping), #affected
// pages, new flags. Invocation should check compatibility of
// new set of flags with cap permissions.
size_t off = ptentry - page->entry;
uintptr_t pmap_flags = vregion_flags_to_kpi_paging_flags(flags);
err = invoke_frame_modify_flags(page->u.frame.cap, off, pages, pmap_flags);
printf("invoke_frame_modify_flags returned error: %s (%"PRIuERRV")\n",
err_getstring(err), err);
return err;
} else {
// overlaps some region border
return LIB_ERR_PMAP_EXISTING_MAPPING;
}
}
}
return SYS_ERR_OK;
}
/*
* check whether player enters/leaves one or more regions.
*/
boolean
in_out_region(struct level *lev, xchar x, xchar y)
{
int i, f_indx;
/* First check if we can do the move */
for (i = 0; i < lev->n_regions; i++) {
if (inside_region(lev->regions[i], x, y)
&& !hero_inside(lev->regions[i]) && !lev->regions[i]->attach_2_u) {
if ((f_indx = lev->regions[i]->can_enter_f) != NO_CALLBACK)
if (!(*callbacks[f_indx]) (lev->regions[i], 0))
return FALSE;
} else if (hero_inside(lev->regions[i])
&& !inside_region(lev->regions[i], x, y)
&& !lev->regions[i]->attach_2_u) {
if ((f_indx = lev->regions[i]->can_leave_f) != NO_CALLBACK)
if (!(*callbacks[f_indx]) (lev->regions[i], 0))
return FALSE;
}
}
/* Callbacks for the regions we do leave */
for (i = 0; i < lev->n_regions; i++)
if (hero_inside(lev->regions[i]) && !lev->regions[i]->attach_2_u &&
!inside_region(lev->regions[i], x, y)) {
clear_hero_inside(lev->regions[i]);
if (lev->regions[i]->leave_msg != NULL)
pline("%s", lev->regions[i]->leave_msg);
if ((f_indx = lev->regions[i]->leave_f) != NO_CALLBACK)
(void)(*callbacks[f_indx]) (lev->regions[i], 0);
}
/* Callbacks for the regions we do enter */
for (i = 0; i < lev->n_regions; i++)
if (!hero_inside(lev->regions[i]) && !lev->regions[i]->attach_2_u &&
inside_region(lev->regions[i], x, y)) {
set_hero_inside(lev->regions[i]);
if (lev->regions[i]->enter_msg != NULL)
pline("%s", lev->regions[i]->enter_msg);
if ((f_indx = lev->regions[i]->enter_f) != NO_CALLBACK)
(void)(*callbacks[f_indx]) (lev->regions[i], 0);
}
return TRUE;
}
/*
* check whether a monster enters/leaves one or more region.
*/
boolean
m_in_out_region(struct monst * mon, xchar x, xchar y)
{
int i, f_indx;
/* First check if we can do the move */
for (i = 0; i < mon->dlevel->n_regions; i++) {
if (inside_region(mon->dlevel->regions[i], x, y) &&
!mon_in_region(mon->dlevel->regions[i], mon) &&
mon->dlevel->regions[i]->attach_2_m != mon->m_id) {
if ((f_indx = mon->dlevel->regions[i]->can_enter_f) != NO_CALLBACK)
if (!(*callbacks[f_indx]) (mon->dlevel->regions[i], mon))
return FALSE;
} else if (mon_in_region(mon->dlevel->regions[i], mon) &&
!inside_region(mon->dlevel->regions[i], x, y) &&
mon->dlevel->regions[i]->attach_2_m != mon->m_id) {
if ((f_indx = mon->dlevel->regions[i]->can_leave_f) != NO_CALLBACK)
if (!(*callbacks[f_indx]) (mon->dlevel->regions[i], mon))
return FALSE;
}
}
/* Callbacks for the regions we do leave */
for (i = 0; i < mon->dlevel->n_regions; i++)
if (mon_in_region(mon->dlevel->regions[i], mon) &&
mon->dlevel->regions[i]->attach_2_m != mon->m_id &&
!inside_region(mon->dlevel->regions[i], x, y)) {
remove_mon_from_reg(mon->dlevel->regions[i], mon);
if ((f_indx = mon->dlevel->regions[i]->leave_f) != NO_CALLBACK)
(void)(*callbacks[f_indx]) (mon->dlevel->regions[i], mon);
}
/* Callbacks for the regions we do enter */
for (i = 0; i < mon->dlevel->n_regions; i++)
if (!hero_inside(mon->dlevel->regions[i]) &&
!mon->dlevel->regions[i]->attach_2_u &&
inside_region(mon->dlevel->regions[i], x, y)) {
add_mon_to_reg(mon->dlevel->regions[i], mon);
if ((f_indx = mon->dlevel->regions[i]->enter_f) != NO_CALLBACK)
(void)(*callbacks[f_indx]) (mon->dlevel->regions[i], mon);
}
return TRUE;
}
/*
* Check if a spot is under a visible region (eg: gas cloud).
* Returns NULL if not, otherwise returns region.
*/
struct region *
visible_region_at(struct level *lev, xchar x, xchar y)
{
int i;
for (i = 0; i < lev->n_regions; i++)
if (inside_region(lev->regions[i], x, y) && lev->regions[i]->visible &&
lev->regions[i]->ttl != 0)
return lev->regions[i];
return NULL;
}
/*
* Checks player's regions after a teleport for instance.
*/
void
update_player_regions(struct level *lev)
{
int i;
for (i = 0; i < lev->n_regions; i++)
if (!lev->regions[i]->attach_2_u &&
inside_region(lev->regions[i], u.ux, u.uy))
set_hero_inside(lev->regions[i]);
else
clear_hero_inside(lev->regions[i]);
}
/*
* Add a region to the list.
* This actually activates the region.
*/
void
add_region(struct level *lev, struct region *reg)
{
struct region **tmp_reg;
int i, j;
if (lev->max_regions <= lev->n_regions) {
tmp_reg = lev->regions;
lev->regions =
malloc(sizeof (struct region *) * (lev->max_regions + 10));
if (lev->max_regions > 0) {
memcpy(lev->regions, tmp_reg,
lev->max_regions * sizeof (struct region *));
free(tmp_reg);
}
lev->max_regions += 10;
}
reg->lev = lev;
lev->regions[lev->n_regions] = reg;
lev->n_regions++;
/* Check for monsters inside the region */
for (i = reg->bounding_box.lx; i <= reg->bounding_box.hx; i++)
for (j = reg->bounding_box.ly; j <= reg->bounding_box.hy; j++) {
/* Some lev->regions can cross the level boundaries */
if (!isok(i, j))
continue;
if (MON_AT(level, i, j) && inside_region(reg, i, j))
add_mon_to_reg(reg, level->monsters[i][j]);
if (reg->visible && cansee(i, j))
newsym(i, j);
}
/* Check for player now... */
if (inside_region(reg, u.ux, u.uy))
set_hero_inside(reg);
else
clear_hero_inside(reg);
}
/*
* Ditto for a specified monster.
*/
void
update_monster_region(struct monst *mon)
{
int i;
for (i = 0; i < mon->dlevel->n_regions; i++) {
if (inside_region(mon->dlevel->regions[i], mon->mx, mon->my)) {
if (!mon_in_region(mon->dlevel->regions[i], mon))
add_mon_to_reg(mon->dlevel->regions[i], mon);
} else {
if (mon_in_region(mon->dlevel->regions[i], mon))
remove_mon_from_reg(mon->dlevel->regions[i], mon);
}
}
}
/*
* Remove a region from the list & free it.
*/
void
remove_region(struct region *reg)
{
int i, x, y;
struct level *lev = reg->lev;
for (i = 0; i < reg->lev->n_regions; i++)
if (reg->lev->regions[i] == reg)
break;
if (i == reg->lev->n_regions)
return;
/* Update screen if necessary */
if (reg->visible && level == lev)
for (x = reg->bounding_box.lx; x <= reg->bounding_box.hx; x++)
for (y = reg->bounding_box.ly; y <= reg->bounding_box.hy; y++)
if (isok(x, y) && inside_region(reg, x, y) && cansee(x, y))
newsym(x, y);
free_region(reg);
lev->regions[i] = lev->regions[lev->n_regions - 1];
lev->regions[lev->n_regions - 1] = NULL;
lev->n_regions--;
}