120 lines
3.7 KiB
C
120 lines
3.7 KiB
C
/****************************************************************************
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* libs/libnx/nxmu/nx_getrectangle.c
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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 <mqueue.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/nx/nx.h>
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#include <nuttx/nx/nxbe.h>
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#include <nuttx/nx/nxmu.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nx_getrectangle
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*
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* Description:
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* Get the raw contents of graphic memory within a rectangular region. NOTE:
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* Since raw graphic memory is returned, the returned memory content may be
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* the memory of windows above this one and may not necessarily belong to
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* this window unless you assure that this is the top window.
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*
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* Input Parameters:
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* wnd - The window structure reference
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* rect - The location to be copied
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* plane - Specifies the color plane to get from.
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* dest - The location to copy the memory region
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* deststride - The width, in bytes, of the dest memory
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*
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* Returned Value:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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int nx_getrectangle(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
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unsigned int plane, FAR uint8_t *dest,
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unsigned int deststride)
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{
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FAR struct nxbe_window_s *wnd = (FAR struct nxbe_window_s *)hwnd;
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struct nxsvrmsg_getrectangle_s outmsg;
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int ret;
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sem_t sem_done;
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#ifdef CONFIG_DEBUG_FEATURES
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if (!hwnd || !rect || !dest)
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{
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ginfo("Invalid parameters\n");
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set_errno(EINVAL);
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return ERROR;
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}
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#endif
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/* Format the fill command */
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outmsg.msgid = NX_SVRMSG_GETRECTANGLE;
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outmsg.wnd = wnd;
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outmsg.plane = plane;
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outmsg.dest = dest;
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outmsg.deststride = deststride;
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nxgl_rectcopy(&outmsg.rect, rect);
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/* Create a semaphore for tracking command completion */
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outmsg.sem_done = &sem_done;
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ret = nxsem_init(&sem_done, 0, 0);
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if (ret < 0)
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{
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gerr("ERROR: nxsem_init failed: %d\n", ret);
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return ret;
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}
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/* Forward the fill command to the server */
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ret = nxmu_sendwindow(wnd, &outmsg,
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sizeof(struct nxsvrmsg_getrectangle_s));
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/* Wait that the command is completed, so that caller can release the
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* buffer.
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*/
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if (ret == OK)
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{
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ret = nxsem_wait(&sem_done);
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}
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/* Destroy the semaphore and return. */
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nxsem_destroy(&sem_done);
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return ret;
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}
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