103 lines
3.1 KiB
C
103 lines
3.1 KiB
C
/*
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* (C) Copyright IBM Corporation 2004
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* on the rights to use, copy, modify, merge, publish, distribute, sub
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* license, and/or sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file glx_query.c
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* Generic utility functions to query internal data from the server.
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*
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* \author Ian Romanick <idr@us.ibm.com>
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*/
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#include "glxclient.h"
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/**
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* GLX protocol structure for the ficticious "GXLGenericGetString" request.
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*
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* This is a non-existant protocol packet. It just so happens that all of
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* the real protocol packets used to request a string from the server have
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* an identical binary layout. The only difference between them is the
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* meaning of the \c for_whom field and the value of the \c glxCode.
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*/
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typedef struct GLXGenericGetString {
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CARD8 reqType;
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CARD8 glxCode;
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CARD16 length B16;
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CARD32 for_whom B32;
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CARD32 name B32;
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} xGLXGenericGetStringReq;
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/* These defines are only needed to make the GetReq macro happy.
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*/
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#define sz_xGLXGenericGetStringReq 12
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#define X_GLXGenericGetString 0
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/**
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* Query the Server GLX string and cache it in the display private.
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* This routine will allocate the necessay space for the string.
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*/
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char *
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__glXGetStringFromServer( Display * dpy, int opcode, CARD32 glxCode,
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CARD32 for_whom, CARD32 name )
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{
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xGLXGenericGetStringReq *req;
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xGLXSingleReply reply;
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int length;
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int numbytes;
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char * buf;
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LockDisplay( dpy );
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/* All of the GLX protocol requests for getting a string from the server
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* look the same. The exact meaning of the for_whom field is usually
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* either the screen number (for glXQueryServerString) or the context tag
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* (for GLXSingle).
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*/
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GetReq( GLXGenericGetString, req );
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req->reqType = opcode;
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req->glxCode = glxCode;
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req->for_whom = for_whom;
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req->name = name;
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_XReply( dpy, (xReply *) & reply, 0, False );
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length = reply.length * 4;
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numbytes = reply.size;
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buf = (char *) Xmalloc( numbytes );
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if ( buf != NULL ) {
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_XRead( dpy, buf, numbytes );
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length -= numbytes;
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}
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_XEatData( dpy, length );
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UnlockDisplay( dpy );
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SyncHandle();
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return buf;
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}
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