xstorenamedcolor.html
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<HTML><HEAD><TITLE>Xlib Programming Manual: XStoreNamedColor</TITLE></HEAD><BODY><H1 ALIGN=center>XStoreNamedColor</H1><H2>Syntax</H2><!.IN "Color" "storing"><!.IN "Color" "naming"><!.IN "XStoreNamedColor" "" "@DEF@"><CODE><PRE>XStoreNamedColor(<B>display</B>, <B>colormap</B>, <B>color</B>, <B>pixel</B>, <B>flags</B>) <A HREF="../display/opening.html#Display">Display</A> *<B>display</B>; <A HREF="./#colormap">Colormap</A> <B>colormap</B>; char *<B>color</B>; unsigned long <B>pixel</B>; int <B>flags</B>;</PRE></CODE><H2>Arguments</H2><TABLE><TR><TD> <B>display</B><TD> Specifies the connection to the X server.<TR><TD> <B>colormap</B><TD> Specifies the colormap.<TR><TD> <B>color</B><TD> Specifies the color name string (for example, red). <TR><TD> <B>pixel</B><TD> Specifies the entry in the colormap. <TR><TD> <B>flags</B><TD> Specifies which red, green, and blue components are set.</TABLE><H2>Description</H2> The<B>XStoreNamedColor()</B>function looks up the named color with respect to the screen associated withthe colormap and stores the result in the specified colormap.The pixel argument determines the entry in the colormap.The flags argument determines which of the red, green, and blue components are set. You can set this member to thebitwise inclusive OR of the bits <B>DoRed</B>, <B>DoGreen</B>, and <B>DoBlue</B>.If the color name is not in the Host Portable Character Encoding, the result is implementation dependent.Use of uppercase or lowercase does not matter.If the specified pixel is not a valid index into the colormap, a<B>BadValue</B>error results.If the specified pixel either is unallocated or is allocated read-only, a<B>BadAccess</B>error results.<P><B>XStoreNamedColor()</B>can generate<B>BadAccess</B>,<B>BadColor</B>,<B>BadName</B>,and <B>BadValue</B> errors.<H2>Diagnostics</H2><TABLE><TR><TD><B>BadAccess</B><TD> A client attempted to free a color map entry thatit did not already allocate.<TR><TD><B>BadAccess</B><TD> A client attempted to store into a read-only color map entry.<TR><TD><B>BadColor</B><TD> A value for a Colormap argument does not name a defined Colormap.<TR><TD><B>BadName</B><TD> A font or color of the specified name does not exist.<TR><TD><B>BadValue</B><TD> Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error.</TABLE><H2>See also</H2><B><A HREF="XAllocColor.html">XAllocColor()</A></B>,<B><A HREF="XCreateColormap.html">XCreateColormap()</A></B>,<B><A HREF="XQueryColor.html">XQueryColor()</A></B>,<B><A HREF="XStoreColor.html">XStoreColor()</A></B>,<B><A HREF="XStoreColors.html">XStoreColors()</A></B>,"<A HREF="modifying-and-querying-cells.html">Modifying and Querying Colormap Cells</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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