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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>glXCreateGLXPixmap</STRONG> - create an off-screen GLX rendering area <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG> GLXPixmap <STRONG>glXCreateGLXPixmap</STRONG>( Display *<EM>dpy</EM>, XVisualInfo *<EM>vis</EM>, Pixmap <EM>pixmap</EM> ) <STRONG>PARAMETERS</STRONG> <EM>dpy</EM> Specifies the connection to the X server. <EM>vis</EM> Specifies the visual that defines the structure of the rendering area. It is a pointer to an <STRONG>XVisualInfo</STRONG> structure, not a visual ID or a pointer to a <STRONG>Visual</STRONG>. <EM>pixmap</EM> Specifies the X pixmap that will be used as the front left color buffer of the off-screen rendering area. <STRONG>DESCRIPTION</STRONG> <STRONG>glXCreateGLXPixmap</STRONG> creates an off-screen rendering area and returns its XID. Any GLX rendering context that was created with respect to <EM>vis</EM> can be used to render into this off- screen area. Use <STRONG>glXMakeCurrent</STRONG> to associate the rendering area with a GLX rendering context. The X pixmap identified by <EM>pixmap</EM> is used as the front left buffer of the resulting off-screen rendering area. All other buffers specified by <EM>vis</EM>, including color buffers other than the front left buffer, are created without externally visible names. GLX pixmaps with double-buffering are supported. However, <STRONG>glXSwapBuffers</STRONG> is ignored by these pixmaps. Some implementations may not support GLX pixmaps with direct rendering contexts. <STRONG>NOTES</STRONG> <STRONG>XVisualInfo</STRONG> is defined in <EM>Xutil</EM>.<EM>h</EM>. It is a structure that includes <EM>visual</EM>, <EM>visualID</EM>, <EM>screen</EM>, and <EM>depth</EM> elements. <STRONG>ERRORS</STRONG> <STRONG>BadMatch</STRONG> is generated if the depth of <EM>pixmap</EM> does not match the depth value reported by core X11 for <EM>vis</EM>, or if <EM>pixmap</EM> was not created with respect to the same screen as <EM>vis</EM>. <STRONG>BadValue</STRONG> is generated if <EM>vis</EM> is not a valid XVisualInfo pointer (for example, if a particular GLX implementation does not support this visual). <STRONG>BadPixmap</STRONG> is generated if <EM>pixmap</EM> is not a valid pixmap. <STRONG>BadAlloc</STRONG> is generated if the server cannot allocate the GLX pixmap. <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>glXCreateContext</STRONG>, <STRONG>glXIsDirect</STRONG>, <STRONG>glXMakeCurrent</STRONG></PRE></BODY></HTML>⌨️ 快捷键说明
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