113 lines
3.8 KiB
C
113 lines
3.8 KiB
C
/****************************************************************************
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* libs/libnx/nxtk/nxtk_bitmapwindow.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 <sys/types.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/nx/nxtk.h>
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#include <nuttx/nx/nx.h>
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#include "nxtk.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxtk_bitmapwindow
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*
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* Description:
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* Copy a rectangular region of a larger image into the rectangle in the
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* specified client sub-window.
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*
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* Input Parameters:
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* hfwnd The client sub0window that will receive the bitmap image
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* dest - Describes the rectangular region on in the client sub-window
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* will receive the bit map.
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* src - The start of the source image.
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* origin - The origin of the upper, left-most corner of the full bitmap.
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* Both dest and origin are in sub-window coordinates, however,
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* the origin may lie outside of the sub-window display.
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* stride - The width of the full source image in pixels.
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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 nxtk_bitmapwindow(NXTKWINDOW hfwnd, FAR const struct nxgl_rect_s *dest,
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FAR const void **src,
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FAR const struct nxgl_point_s *origin,
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unsigned int stride)
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{
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FAR struct nxtk_framedwindow_s *fwnd =
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(FAR struct nxtk_framedwindow_s *)hfwnd;
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struct nxgl_point_s wndorigin;
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struct nxgl_rect_s clipdest;
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#ifdef CONFIG_DEBUG_FEATURES
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if (!hfwnd || !dest || !src || !origin)
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{
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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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/* Clip the rectangle so that it lies within the sub-window bounds
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* then move the rectangle to that it is relative to the containing
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* window.
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*/
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nxtk_subwindowclip(fwnd, &clipdest, dest, &fwnd->fwrect);
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/* Just return if completely outside screen */
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if (nxgl_nullrect(&clipdest))
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{
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return OK;
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}
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/* Now, move the bitmap origin so that it is relative to the containing
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* window, not the sub-window.
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*
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* Temporarily, position the origin in absolute screen coordinates
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*/
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nxgl_vectoradd(&wndorigin, origin, &fwnd->fwrect.pt1);
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/* Then move the origin so that is relative to the containing window, not
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* the client subwindow
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*/
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nxgl_vectsubtract(&wndorigin, &wndorigin, &fwnd->wnd.bounds.pt1);
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/* Then copy the bitmap */
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nx_bitmap((NXWINDOW)hfwnd, &clipdest, src, &wndorigin, stride);
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return OK;
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}
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