ncurses 6.0 - patch 20170506
[ncurses.git] / doc / html / man / curs_overlay.3x.html
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41 <H1 class="no-header">curs_overlay 3x</H1>
42 <PRE>
43 <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG>                                              <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG>
44
45
46
47
48 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
49        <STRONG>overlay</STRONG>, <STRONG>overwrite</STRONG>, <STRONG>copywin</STRONG> - overlay and manipulate overlapped <STRONG>curses</STRONG>
50        windows
51
52
53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
54        <STRONG>#include</STRONG> <STRONG>&lt;curses.h&gt;</STRONG>
55
56        <STRONG>int</STRONG> <STRONG>overlay(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>srcwin</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>dstwin</EM><STRONG>);</STRONG>
57        <STRONG>int</STRONG> <STRONG>overwrite(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>srcwin</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>dstwin</EM><STRONG>);</STRONG>
58        <STRONG>int</STRONG> <STRONG>copywin(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>srcwin</EM><STRONG>,</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>dstwin</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>sminrow</EM><STRONG>,</STRONG>
59              <STRONG>int</STRONG> <EM>smincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>dminrow</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>dmincol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>dmaxrow</EM><STRONG>,</STRONG>
60              <STRONG>int</STRONG> <EM>dmaxcol</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>overlay</EM><STRONG>);</STRONG>
61
62
63 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
64
65 </PRE><H3><a name="h3-overlay_-overwrite">overlay, overwrite</a></H3><PRE>
66        The <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> routines overlay <EM>srcwin</EM>  on  top  of  <EM>dstwin</EM>.
67        <EM>scrwin</EM> and <EM>dstwin</EM> are not required to be the same size; only text where
68        the two windows overlap is copied.  The difference is that  <STRONG>overlay</STRONG>  is
69        non-destructive  (blanks  are not copied) whereas <STRONG>overwrite</STRONG> is destruc-
70        tive.
71
72
73 </PRE><H3><a name="h3-copywin">copywin</a></H3><PRE>
74        The <STRONG>copywin</STRONG> routine provides a finer granularity of  control  over  the
75        <STRONG>overlay</STRONG>  and <STRONG>overwrite</STRONG> routines.  As in the <STRONG>prefresh</STRONG> routine, a rectan-
76        gle is specified in the  destination  window,  (<EM>dminrow</EM>,  <EM>dmincol</EM>)  and
77        (<EM>dmaxrow</EM>, <EM>dmaxcol</EM>), and the upper-left-corner coordinates of the source
78        window, (<EM>sminrow</EM>, <EM>smincol</EM>).  If the  argument  <EM>overlay</EM>  is  <STRONG>true</STRONG>,  then
79        copying is non-destructive, as in <STRONG>overlay</STRONG>.
80
81
82 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
83        Routines  that  return an integer return <STRONG>ERR</STRONG> upon failure, and <STRONG>OK</STRONG> (SVr4
84        only specifies "an integer value other than <STRONG>ERR</STRONG>") upon successful  com-
85        pletion.
86
87        X/Open  defines  no error conditions.  In this implementation, <STRONG>copywin</STRONG>,
88        <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> return an error if either of the window  pointers
89        are null, or if some part of the window would be placed off-screen.
90
91
92 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
93        Note that <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> may be macros.
94
95
96 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
97        The  XSI Curses standard, Issue 4 describes these functions (adding the
98        const qualifiers).  It further specifies their behavior in the presence
99        of  characters with multibyte renditions (not yet supported in this im-
100        plementation).
101
102
103 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
104        <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_pad.3x.html">curs_pad(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>
105
106
107
108                                                               <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG>
109 </PRE>
110 <div class="nav">
111 <ul>
112 <li><a href="#h2-NAME">NAME</a></li>
113 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
114 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
115 <ul>
116 <li><a href="#h3-overlay_-overwrite">overlay, overwrite</a></li>
117 <li><a href="#h3-copywin">copywin</a></li>
118 </ul>
119 </li>
120 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
121 <li><a href="#h2-NOTES">NOTES</a></li>
122 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
123 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
124 </ul>
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