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28 * Generic utility functions to query internal data from the server.
30 * \author Ian Romanick <idr@us.ibm.com>
33 #include "glxclient.h"
36 * GLX protocol structure for the ficticious "GXLGenericGetString" request.
38 * This is a non-existant protocol packet. It just so happens that all of
39 * the real protocol packets used to request a string from the server have
40 * an identical binary layout. The only difference between them is the
41 * meaning of the \c for_whom field and the value of the \c glxCode.
43 typedef struct GLXGenericGetString
50 } xGLXGenericGetStringReq
;
52 /* These defines are only needed to make the GetReq macro happy.
54 #define sz_xGLXGenericGetStringReq 12
55 #define X_GLXGenericGetString 0
58 * Query the Server GLX string and cache it in the display private.
59 * This routine will allocate the necessay space for the string.
62 __glXGetStringFromServer(Display
* dpy
, int opcode
, CARD32 glxCode
,
63 CARD32 for_whom
, CARD32 name
)
65 xGLXGenericGetStringReq
*req
;
66 xGLXSingleReply reply
;
75 /* All of the GLX protocol requests for getting a string from the server
76 * look the same. The exact meaning of the for_whom field is usually
77 * either the screen number (for glXQueryServerString) or the context tag
81 GetReq(GLXGenericGetString
, req
);
82 req
->reqType
= opcode
;
83 req
->glxCode
= glxCode
;
84 req
->for_whom
= for_whom
;
87 _XReply(dpy
, (xReply
*) & reply
, 0, False
);
89 length
= reply
.length
* 4;
90 numbytes
= reply
.size
;
92 buf
= (char *) Xmalloc(numbytes
);
94 _XRead(dpy
, buf
, numbytes
);
98 _XEatData(dpy
, length
);