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nuttx-apps/graphics/pdcurs34/pdcurses/pdc_overlay.c
Alin Jerpelea 33254aaaad apps: graphics: pdcurs34: update licenses to Apache 
Gregory Nutt is the copyright holder for those files and he has submitted the
SGA as a result we can migrate the licenses to Apache.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2022-03-11 00:14:32 +02:00

332 lines
8.9 KiB
C
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/****************************************************************************
* apps/graphics/pdcurses/pdc_overlay.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Adapted from the original public domain pdcurses by Gregory Nutt
****************************************************************************/
/* Name: overlay
*
* Synopsis:
* int overlay(const WINDOW *src_w, WINDOW *dst_w)
* int overwrite(const WINDOW *src_w, WINDOW *dst_w)
* int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
* int src_tc, int dst_tr, int dst_tc, int dst_br,
* int dst_bc, bool overlay)
*
* Description:
* overlay() and overwrite() copy all the text from src_w into
* dst_w. The windows need not be the same size. Those characters
* in the source window that intersect with the destination window
* are copied, so that the characters appear in the same physical
* position on the screen. The difference between the two functions
* is that overlay() is non-destructive (blanks are not copied)
* while overwrite() is destructive (blanks are copied).
*
* copywin() is similar, but doesn't require that the two windows
* overlap. The arguments src_tc and src_tr specify the top left
* corner of the region to be copied. dst_tc, dst_tr, dst_br, and
* dst_bc specify the region within the destination window to copy
* to. The argument "overlay", if true, indicates that the copy is
* done non-destructively (as in overlay()); blanks in the source
* window are not copied to the destination window. When overlay is
* false, blanks are copied.
*
* Return Value:
* All functions return OK on success and ERR on error.
*
* Portability X/Open BSD SYS V
* overlay Y Y Y
* overwrite Y Y Y
* copywin Y - 3.0
*
*
* Thanks to Andreas Otte <venn@@uni-paderborn.de> for the
* corrected overlay()/overwrite() behavior.
*/
/****************************************************************************
* Included Files
****************************************************************************/
#include "curspriv.h"
/****************************************************************************
* Private Functions
****************************************************************************/
static int _copy_win(const WINDOW *src_w, WINDOW *dst_w, int src_tr,
int src_tc, int src_br, int src_bc, int dst_tr,
int dst_tc, bool overlay)
{
int col;
int line;
int y1;
int fc;
int *minchng;
int *maxchng;
chtype *w1ptr;
chtype *w2ptr;
int lc = 0;
int xdiff = src_bc - src_tc;
int ydiff = src_br - src_tr;
if (!src_w || !dst_w)
{
return ERR;
}
minchng = dst_w->_firstch;
maxchng = dst_w->_lastch;
for (y1 = 0; y1 < dst_tr; y1++)
{
minchng++;
maxchng++;
}
for (line = 0; line < ydiff; line++)
{
w1ptr = src_w->_y[line + src_tr] + src_tc;
w2ptr = dst_w->_y[line + dst_tr] + dst_tc;
fc = _NO_CHANGE;
for (col = 0; col < xdiff; col++)
{
if ((*w1ptr) != (*w2ptr) &&
!((*w1ptr & A_CHARTEXT) == ' ' && overlay))
{
*w2ptr = *w1ptr;
if (fc == _NO_CHANGE)
{
fc = col + dst_tc;
}
lc = col + dst_tc;
}
w1ptr++;
w2ptr++;
}
if (*minchng == _NO_CHANGE)
{
*minchng = fc;
*maxchng = lc;
}
else if (fc != _NO_CHANGE)
{
if (fc < *minchng)
{
*minchng = fc;
}
if (lc > *maxchng)
{
*maxchng = lc;
}
}
minchng++;
maxchng++;
}
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
int overlay(const WINDOW *src_w, WINDOW *dst_w)
{
int first_line;
int first_c;
int last_line;
int last_col;
int src_start_x;
int src_start_y;
int dst_start_x;
int dst_start_y;
int xdiff;
int ydiff;
PDC_LOG(("overlay() - called\n"));
if (!src_w || !dst_w)
{
return ERR;
}
first_c = max(dst_w->_begx, src_w->_begx);
first_line = max(dst_w->_begy, src_w->_begy);
last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
/* Determine the overlapping region of the two windows in real coordinates */
/* If no overlapping region, do nothing */
if ((last_col < first_c) || (last_line < first_line))
{
return OK;
}
/* Size of overlapping region */
xdiff = last_col - first_c;
ydiff = last_line - first_line;
if (src_w->_begx <= dst_w->_begx)
{
src_start_x = dst_w->_begx - src_w->_begx;
dst_start_x = 0;
}
else
{
dst_start_x = src_w->_begx - dst_w->_begx;
src_start_x = 0;
}
if (src_w->_begy <= dst_w->_begy)
{
src_start_y = dst_w->_begy - src_w->_begy;
dst_start_y = 0;
}
else
{
dst_start_y = src_w->_begy - dst_w->_begy;
src_start_y = 0;
}
return _copy_win(src_w, dst_w, src_start_y, src_start_x,
src_start_y + ydiff, src_start_x + xdiff,
dst_start_y, dst_start_x, true);
}
int overwrite(const WINDOW *src_w, WINDOW *dst_w)
{
int first_line;
int first_c;
int last_line;
int last_col;
int src_start_x;
int src_start_y;
int dst_start_x;
int dst_start_y;
int xdiff;
int ydiff;
PDC_LOG(("overwrite() - called\n"));
if (!src_w || !dst_w)
{
return ERR;
}
first_c = max(dst_w->_begx, src_w->_begx);
first_line = max(dst_w->_begy, src_w->_begy);
last_col = min(src_w->_begx + src_w->_maxx, dst_w->_begx + dst_w->_maxx);
last_line = min(src_w->_begy + src_w->_maxy, dst_w->_begy + dst_w->_maxy);
/* Determine the overlapping region of the two windows in real coordinates */
/* If no overlapping region, do nothing */
if ((last_col < first_c) || (last_line < first_line))
{
return OK;
}
/* Size of overlapping region */
xdiff = last_col - first_c;
ydiff = last_line - first_line;
if (src_w->_begx <= dst_w->_begx)
{
src_start_x = dst_w->_begx - src_w->_begx;
dst_start_x = 0;
}
else
{
dst_start_x = src_w->_begx - dst_w->_begx;
src_start_x = 0;
}
if (src_w->_begy <= dst_w->_begy)
{
src_start_y = dst_w->_begy - src_w->_begy;
dst_start_y = 0;
}
else
{
dst_start_y = src_w->_begy - dst_w->_begy;
src_start_y = 0;
}
return _copy_win(src_w, dst_w, src_start_y, src_start_x,
src_start_y + ydiff, src_start_x + xdiff,
dst_start_y, dst_start_x, false);
}
int copywin(const WINDOW *src_w, WINDOW *dst_w, int src_tr, int src_tc,
int dst_tr, int dst_tc, int dst_br, int dst_bc, int overlay)
{
int src_end_x;
int src_end_y;
int src_rows;
int src_cols;
int dst_rows;
int dst_cols;
int min_rows;
int min_cols;
#ifdef CONFIG_PDCURSES_MULTITHREAD
FAR struct pdc_context_s *ctx = PDC_ctx();
#endif
PDC_LOG(("copywin() - called\n"));
if (!src_w || !dst_w || dst_w == curscr || dst_br > dst_w->_maxy ||
dst_bc > dst_w->_maxx || dst_tr < 0 || dst_tc < 0)
{
return ERR;
}
src_rows = src_w->_maxy - src_tr;
src_cols = src_w->_maxx - src_tc;
dst_rows = dst_br - dst_tr + 1;
dst_cols = dst_bc - dst_tc + 1;
min_rows = min(src_rows, dst_rows);
min_cols = min(src_cols, dst_cols);
src_end_y = src_tr + min_rows;
src_end_x = src_tc + min_cols;
return _copy_win(src_w, dst_w, src_tr, src_tc, src_end_y, src_end_x,
dst_tr, dst_tc, overlay);
}
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