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<HTML><HEAD><TITLE>Xlib Programming Manual: XGetRGBColormaps</TITLE></HEAD><BODY><H1 ALIGN=center>XGetRGBColormaps</H1><H2>Syntax</H2><!.IN "XGetRGBColormaps" "" "@DEF@"><CODE><PRE><B><A HREF="../../introduction/errors.html#Status">Status</A></B> XGetRGBColormaps(<B>display</B>, <B>w</B>, <B>std_colormap_return</B>, <B>count_return</B>, <B>property</B>) <A HREF="../../display/opening.html#Display">Display</A> *<B>display</B>; Window <B>w</B>; <B><A HREF="./#XStandardColormap">XStandardColormap</A></B> **<B>std_colormap_return</B>; int *<B>count_return</B>; Atom <B>property</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>w</B><TD> Specifies the window.<TR><TD> <B>std_colormap_return</B><TD> Returns the<B><A HREF="./#XStandardColormap">XStandardColormap</A></B>structure.<TR><TD> <B>count_return</B><TD> Returns the number of colormaps.<TR><TD> <B>property</B><TD> Specifies the property name.</TABLE><H2>Description</H2>The <B>XGetRGBColormaps()</B>function returns the RGB colormap definitions stored in the specified property on the named window.If the property exists, is of type RGB_COLOR_MAP, is of format 32, and is long enough to contain a colormap definition,<B>XGetRGBColormaps()</B>allocates and fills in space for the returned colormapsand returns a nonzero status.If the visualid is not present, <B>XGetRGBColormaps()</B>assumes the default visual for the screen on which the window is located; if the killid is not present, <B>None</B>is assumed, which indicates that the resources cannot be released.Otherwise, none of the fields are set, and <B>XGetRGBColormaps()</B>returns a zero status.Note that it is the caller's responsibility to honor the <A HREF="/gui/x/icccm/">ICCCM</A>restriction that only RGB_DEFAULT_MAP contain more than one definition.<P><B>XGetRGBColormaps()</B>can generate<B>BadAtom</B>and<B>BadWindow</B>errors.<H2>Diagnostics</H2><TABLE><TR><TD><B>BadAtom</B><TD> A value for an Atom argument does not name a defined Atom.<TR><TD><B>BadWindow</B><TD>A value for a Window argument does not name a defined Window.</TABLE><H2>See also</H2><B><A HREF="XAllocStandardColormap.html">XAllocStandardColormap()</A></B>,<B><A HREF="XSetRGBColormaps.html">XSetRGBColormaps()</A></B>,<B><A HREF="./#XStandardColormap">XStandardColormap</A></B>,<B><A HREF="../../color/XAllocColor.html">XAllocColor()</A></B>,<B><A HREF="../../color/XCreateColormap.html">XCreateColormap()</A></B>,<B><A HREF="../../display/XFree.html">XFree()</A></B>,<B><A HREF="../../display/XSetCloseDownMode.html">XSetCloseDownMode()</A></B>,"<A HREF="setting-and-obtaining.html">Setting and Obtaining Standard Colormaps</A>".<HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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