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27 * Generic utility functions to query internal data from the server.
29 * \author Ian Romanick <idr@us.ibm.com>
32 #include "glxclient.h"
35 * GLX protocol structure for the ficticious "GXLGenericGetString" request.
37 * This is a non-existant protocol packet. It just so happens that all of
38 * the real protocol packets used to request a string from the server have
39 * an identical binary layout. The only difference between them is the
40 * meaning of the \c for_whom field and the value of the \c glxCode.
42 typedef struct GLXGenericGetString
{
48 } xGLXGenericGetStringReq
;
50 /* These defines are only needed to make the GetReq macro happy.
52 #define sz_xGLXGenericGetStringReq 12
53 #define X_GLXGenericGetString 0
56 * Query the Server GLX string and cache it in the display private.
57 * This routine will allocate the necessay space for the string.
60 __glXGetStringFromServer( Display
* dpy
, int opcode
, CARD32 glxCode
,
61 CARD32 for_whom
, CARD32 name
)
63 xGLXGenericGetStringReq
*req
;
64 xGLXSingleReply reply
;
73 /* All of the GLX protocol requests for getting a string from the server
74 * look the same. The exact meaning of the for_whom field is usually
75 * either the screen number (for glXQueryServerString) or the context tag
79 GetReq( GLXGenericGetString
, req
);
80 req
->reqType
= opcode
;
81 req
->glxCode
= glxCode
;
82 req
->for_whom
= for_whom
;
85 _XReply( dpy
, (xReply
*) & reply
, 0, False
);
87 length
= reply
.length
* 4;
88 numbytes
= reply
.size
;
90 buf
= (char *) Xmalloc( numbytes
);
92 _XRead( dpy
, buf
, numbytes
);
96 _XEatData( dpy
, length
);