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29 * @Id: curs_overlay.3x,v 1.18 2015/07/21 00:51:31 tom Exp @
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41 <H1 class="no-header">curs_overlay 3x</H1>
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>
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>
53 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
54 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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>
63 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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-
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>.
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-
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.
92 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
93 Note that <STRONG>overlay</STRONG> and <STRONG>overwrite</STRONG> may be macros.
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-
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>
108 <STRONG><A HREF="curs_overlay.3x.html">curs_overlay(3x)</A></STRONG>
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>
116 <li><a href="#h3-overlay_-overwrite">overlay, overwrite</a></li>
117 <li><a href="#h3-copywin">copywin</a></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>