148 lines
4.0 KiB
C
148 lines
4.0 KiB
C
/****************************************************************************
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* graphics/nxbe/nxbe_closewindow.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/nx/nxglib.h>
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#if defined(CONFIG_NX_RAMBACKED) && defined(CONFIG_BUILD_KERNEL)
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# include "nuttx/pgalloc.h"
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#endif
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#include "nxbe.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxbe_closewindow
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*
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* Description:
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* Close an existing window
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*
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* Input Parameters:
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* wnd - The window to be closed (and deallocated using the user-space
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* allocator)
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void nxbe_closewindow(FAR struct nxbe_window_s *wnd)
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{
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FAR struct nxbe_state_s *be;
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DEBUGASSERT(wnd != NULL);
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be = wnd->be;
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/* The background window should never be closed */
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DEBUGASSERT(wnd != &be->bkgd);
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/* Are we closing a modal window? */
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if (NXBE_ISMODAL(wnd))
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{
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/* Yes.. this should be the top window and the back-end should also
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* indicate the modal state.
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*/
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DEBUGASSERT(wnd->above == NULL && NXBE_STATE_ISMODAL(be));
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/* Leave the modal state */
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NXBE_CLRMODAL(wnd);
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NXBE_STATE_CLRMODAL(be);
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}
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/* A hidden window does not exist in the hierarchy */
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if (!NXBE_ISHIDDEN(wnd))
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{
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/* Is there a window above the one being closed? */
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if (wnd->above != NULL)
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{
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/* Yes, now the window below that one is the window below
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* the one being closed.
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*/
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wnd->above->below = wnd->below;
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}
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else
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{
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/* No, then the top window is the one below this (which
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* can never be NULL because the background window is
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* always at the true bottom of the list
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*/
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be->topwnd = wnd->below;
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}
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/* There is always a window below the one being closed (because
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* the background is never closed. Now, the window above that
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* is the window above the one that is being closed.
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*/
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wnd->below->above = wnd->above;
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/* Redraw the windows that were below us (and may now be exposed) */
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nxbe_redrawbelow(be, wnd->below, &wnd->bounds);
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}
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#ifdef CONFIG_NX_RAMBACKED
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/* Free any allocated, per-window framebuffer */
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if (wnd->fbmem != NULL)
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{
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#ifdef CONFIG_BUILD_KERNEL
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DEBUGASSERT(wnd->npages > 0);
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/* Return the pages to the poll */
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mm_pgfree((uintptr_t)wnd->fbmem, wnd->npages);
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#else
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/* Return the memory to the user heap */
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kumm_free(wnd->fbmem);
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#endif
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}
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#endif
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/* Then discard the window structure. Here we assume that the user-space
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* allocator was used.
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*/
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kumm_free(wnd);
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}
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