348 lines
9.7 KiB
C
348 lines
9.7 KiB
C
/****************************************************************************
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* apps/graphics/pdcurses/pdc_overlay.c
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* Public Domain Curses
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* RCSID("$Id: overlay.c,v 1.36 2008/07/14 12:35:23 wmcbrine Exp $")
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Adapted by: Gregory Nutt <gnutt@nuttx.org>
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*
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* Adapted from the original public domain pdcurses by Gregory Nutt and
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* released as part of NuttX under the 3-clause BSD license:
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/* Name: overlay
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*
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* Synopsis:
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* int overlay(const WINDOW *src_w, WINDOW *dst_w)
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* int overwrite(const WINDOW *src_w, WINDOW *dst_w)
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* int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
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* int src_tc, int dst_tr, int dst_tc, int dst_br,
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* int dst_bc, bool overlay)
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*
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* Description:
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* overlay() and overwrite() copy all the text from src_w into
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* dst_w. The windows need not be the same size. Those characters
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* in the source window that intersect with the destination window
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* are copied, so that the characters appear in the same physical
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* position on the screen. The difference between the two functions
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* is that overlay() is non-destructive (blanks are not copied)
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* while overwrite() is destructive (blanks are copied).
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*
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* copywin() is similar, but doesn't require that the two windows
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* overlap. The arguments src_tc and src_tr specify the top left
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* corner of the region to be copied. dst_tc, dst_tr, dst_br, and
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* dst_bc specify the region within the destination window to copy
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* to. The argument "overlay", if true, indicates that the copy is
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* done non-destructively (as in overlay()); blanks in the source
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* window are not copied to the destination window. When overlay is
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* false, blanks are copied.
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*
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* Return Value:
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* All functions return OK on success and ERR on error.
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*
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* Portability X/Open BSD SYS V
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* overlay Y Y Y
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* overwrite Y Y Y
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* copywin Y - 3.0
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*
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*
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* Thanks to Andreas Otte <venn@@uni-paderborn.de> for the
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* corrected overlay()/overwrite() behavior.
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include "curspriv.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static int _copy_win(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
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int src_tc, int src_br, int src_bc, int dst_tr,
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int dst_tc, bool overlay)
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{
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int col;
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int line;
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int y1;
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int fc;
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int *minchng;
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int *maxchng;
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chtype *w1ptr;
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chtype *w2ptr;
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int lc = 0;
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int xdiff = src_bc - src_tc;
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int ydiff = src_br - src_tr;
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if (!src_w || !dst_w)
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{
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return ERR;
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}
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minchng = dst_w->_firstch;
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maxchng = dst_w->_lastch;
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for (y1 = 0; y1 < dst_tr; y1++)
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{
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minchng++;
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maxchng++;
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}
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for (line = 0; line < ydiff; line++)
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{
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w1ptr = src_w->_y[line + src_tr] + src_tc;
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w2ptr = dst_w->_y[line + dst_tr] + dst_tc;
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fc = _NO_CHANGE;
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for (col = 0; col < xdiff; col++)
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{
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if ((*w1ptr) != (*w2ptr) &&
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!((*w1ptr & A_CHARTEXT) == ' ' && overlay))
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{
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*w2ptr = *w1ptr;
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if (fc == _NO_CHANGE)
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{
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fc = col + dst_tc;
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}
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lc = col + dst_tc;
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}
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w1ptr++;
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w2ptr++;
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}
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if (*minchng == _NO_CHANGE)
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{
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*minchng = fc;
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*maxchng = lc;
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}
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else if (fc != _NO_CHANGE)
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{
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if (fc < *minchng)
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{
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*minchng = fc;
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}
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if (lc > *maxchng)
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{
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*maxchng = lc;
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}
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}
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minchng++;
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maxchng++;
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}
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return OK;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int overlay(const WINDOW *src_w, WINDOW *dst_w)
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{
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int first_line;
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int first_c;
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int last_line;
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int last_col;
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int src_start_x;
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int src_start_y;
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int dst_start_x;
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int dst_start_y;
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int xdiff;
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int ydiff;
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PDC_LOG(("overlay() - called\n"));
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if (!src_w || !dst_w)
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{
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return ERR;
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}
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first_c = max(dst_w->_begx, src_w->_begx);
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first_line = max(dst_w->_begy, src_w->_begy);
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last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
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last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
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/* Determine the overlapping region of the two windows in real coordinates */
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/* If no overlapping region, do nothing */
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if ((last_col < first_c) || (last_line < first_line))
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{
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return OK;
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}
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/* Size of overlapping region */
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xdiff = last_col - first_c;
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ydiff = last_line - first_line;
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if (src_w->_begx <= dst_w->_begx)
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{
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src_start_x = dst_w->_begx - src_w->_begx;
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dst_start_x = 0;
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}
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else
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{
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dst_start_x = src_w->_begx - dst_w->_begx;
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src_start_x = 0;
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}
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if (src_w->_begy <= dst_w->_begy)
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{
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src_start_y = dst_w->_begy - src_w->_begy;
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dst_start_y = 0;
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}
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else
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{
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dst_start_y = src_w->_begy - dst_w->_begy;
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src_start_y = 0;
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}
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return _copy_win(src_w, dst_w, src_start_y, src_start_x,
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src_start_y + ydiff, src_start_x + xdiff,
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dst_start_y, dst_start_x, true);
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}
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int overwrite(const WINDOW *src_w, WINDOW *dst_w)
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{
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int first_line;
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int first_c;
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int last_line;
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int last_col;
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int src_start_x;
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int src_start_y;
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int dst_start_x;
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int dst_start_y;
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int xdiff;
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int ydiff;
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PDC_LOG(("overwrite() - called\n"));
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if (!src_w || !dst_w)
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{
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return ERR;
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}
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first_c = max(dst_w->_begx, src_w->_begx);
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first_line = max(dst_w->_begy, src_w->_begy);
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last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
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last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
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/* Determine the overlapping region of the two windows in real coordinates */
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/* If no overlapping region, do nothing */
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if ((last_col < first_c) || (last_line < first_line))
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{
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return OK;
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}
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/* Size of overlapping region */
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xdiff = last_col - first_c;
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ydiff = last_line - first_line;
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if (src_w->_begx <= dst_w->_begx)
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{
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src_start_x = dst_w->_begx - src_w->_begx;
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dst_start_x = 0;
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}
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else
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{
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dst_start_x = src_w->_begx - dst_w->_begx;
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src_start_x = 0;
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}
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if (src_w->_begy <= dst_w->_begy)
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{
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src_start_y = dst_w->_begy - src_w->_begy;
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dst_start_y = 0;
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}
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else
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{
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dst_start_y = src_w->_begy - dst_w->_begy;
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src_start_y = 0;
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}
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return _copy_win(src_w, dst_w, src_start_y, src_start_x,
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src_start_y + ydiff, src_start_x + xdiff,
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dst_start_y, dst_start_x, false);
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}
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int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr, int src_tc,
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int dst_tr, int dst_tc, int dst_br, int dst_bc, int overlay)
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{
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int src_end_x;
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int src_end_y;
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int src_rows;
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int src_cols;
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int dst_rows;
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int dst_cols;
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int min_rows;
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int min_cols;
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#ifdef CONFIG_PDCURSES_MULTITHREAD
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FAR struct pdc_context_s *ctx = PDC_ctx();
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#endif
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PDC_LOG(("copywin() - called\n"));
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if (!src_w || !dst_w || dst_w == curscr || dst_br > dst_w->_maxy ||
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dst_bc > dst_w->_maxx || dst_tr < 0 || dst_tc < 0)
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{
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return ERR;
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}
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src_rows = src_w->_maxy - src_tr;
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src_cols = src_w->_maxx - src_tc;
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dst_rows = dst_br - dst_tr + 1;
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dst_cols = dst_bc - dst_tc + 1;
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min_rows = min(src_rows, dst_rows);
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min_cols = min(src_cols, dst_cols);
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src_end_y = src_tr + min_rows;
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src_end_x = src_tc + min_cols;
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return _copy_win(src_w, dst_w, src_tr, src_tc, src_end_y, src_end_x,
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dst_tr, dst_tc, overlay);
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}
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