static void nxbe_clipmovedest(FAR struct nxbe_clipops_s *cops,
FAR struct nxbe_plane_s *plane,
FAR const struct nxgl_rect_s *rect)
{
struct nxbe_move_s *dstdata = (struct nxbe_move_s *)cops;
struct nxbe_window_s *wnd = dstdata->wnd;
struct nxgl_point_s offset = dstdata->offset;
struct nxgl_rect_s src;
struct nxgl_rect_s tmprect1;
struct nxgl_rect_s tmprect2;
struct nxgl_rect_s nonintersecting[4];
int i;
/* Redraw dest regions where the source is outside of the bounds of the
* background window
*/
nxgl_rectoffset(&tmprect1, &dstdata->srcrect, offset.x, offset.y);
nxgl_rectintersect(&tmprect2, &tmprect1, &wnd->be->bkgd.bounds);
nxgl_nonintersecting(nonintersecting, rect, &tmprect2);
for (i = 0; i < 4; i++)
{
if (!nxgl_nullrect(&nonintersecting[i]))
{
nxfe_redrawreq(dstdata->wnd, &nonintersecting[i]);
}
}
/* Clip to determine what is inside the bounds */
nxgl_rectintersect(&src, rect, &dstdata->srcrect);
if (!nxgl_nullrect(&src))
{
struct nxbe_move_s srcinfo;
srcinfo.cops.visible = nxbe_clipmovesrc;
srcinfo.cops.obscured = nxbe_clipmoveobscured;
srcinfo.offset = offset;
srcinfo.wnd = wnd;
nxbe_clipper(dstdata->wnd->above, &src, dstdata->order,
&srcinfo.cops, plane);
}
}
void nxbe_clipper(FAR struct nxbe_window_s *wnd,
FAR const struct nxgl_rect_s *dest, uint8_t order,
FAR struct nxbe_clipops_s *cops,
FAR struct nxbe_plane_s *plane)
{
struct nxbe_clipstack_s stack;
FAR struct nxbe_window_s *currw;
struct nxgl_rect_s rect;
struct nxgl_rect_s obscuredrect;
struct nxgl_rect_s currbounds;
struct nxgl_rect_s nonoverlapped[4];
int i;
/* Initialize the stack where we will keep deferred rectangle operations */
stack.npushed = 0;
stack.mxrects = 0;
stack.stack = NULL;
/* Loop until there are no further pending operations */
nxgl_rectcopy(&rect, dest); /* Start with the whole dest rectangle */
do
{
/* Loop for every window from the current window and above. Only windows
* above the current window can obscure the current window
*/
for (currw = wnd; currw; currw = currw->above)
{
/* Does the current window overlap the dest rectangle? */
currbounds = currw->bounds;
if (nxgl_rectoverlap(&rect, &currbounds))
{
/* Yes.. then it obscures all or part of the dest rectangle.
* Divide the potentially visible, non-overlapping regions into 4
* smaller rectangles and push them onto the stack for processing
* on the next time through the outer loop.
*/
nxgl_nonintersecting(nonoverlapped, &rect, &currbounds);
for (i = 3; i >= 0; i--)
{
/* Push the rectangles in the order specific by the input
* argument of that name.
*/
struct nxgl_rect_s *candidate = &nonoverlapped[g_nxcliporder[order][i]];
if (!nxgl_nullrect(candidate))
{
nxbe_pushrectangle(&stack, currw->above, candidate);
}
}
/* Now performed any required processing on the obscurred,
* overlapped region.
*/
nxgl_rectintersect(&obscuredrect, &rect, &currbounds);
cops->obscured(cops, plane, &obscuredrect);
/* Break out of the loop to process the pushed rectangles */
break;
}
}
/* If there are no other windows overlapping this rectangle, then this
* rectangular region must be visible.
*/
if (!currw && !nxgl_nullrect(&rect))
{
cops->visible(cops, plane, &rect);
}
}
while (nxbe_poprectangle(&stack, &wnd, &rect));
/* Done! If any stack was allocated, then free it before exit-ting */
if (stack.stack)
{
free(stack.stack);
}
}
