/**
* \file glx_query.c
* Generic utility functions to query internal data from the server.
- *
+ *
* \author Ian Romanick <idr@us.ibm.com>
*/
#include "glxclient.h"
+#if defined(USE_XCB)
+# include <X11/Xlib-xcb.h>
+# include <xcb/xcb.h>
+# include <xcb/glx.h>
+#endif
+
+#ifdef USE_XCB
+
+/**
+ * Exchange a protocol request for glXQueryServerString.
+ */
+char *
+__glXQueryServerString(Display * dpy, int opcode, CARD32 screen, CARD32 name)
+{
+ xcb_connection_t *c = XGetXCBConnection(dpy);
+ xcb_glx_query_server_string_reply_t *reply =
+ xcb_glx_query_server_string_reply(c,
+ xcb_glx_query_server_string(c,
+ screen,
+ name),
+ NULL);
+
+ /* The spec doesn't mention this, but the Xorg server replies with
+ * a string already terminated with '\0'. */
+ uint32_t len = xcb_glx_query_server_string_string_length(reply);
+ char *buf = Xmalloc(len);
+ memcpy(buf, xcb_glx_query_server_string_string(reply), len);
+ free(reply);
+
+ return buf;
+}
+
+/**
+ * Exchange a protocol request for glGetString.
+ */
+char *
+__glXGetString(Display * dpy, int opcode, CARD32 contextTag, CARD32 name)
+{
+ xcb_connection_t *c = XGetXCBConnection(dpy);
+ xcb_glx_get_string_reply_t *reply = xcb_glx_get_string_reply(c,
+ xcb_glx_get_string
+ (c,
+ contextTag,
+ name),
+ NULL);
+
+ /* The spec doesn't mention this, but the Xorg server replies with
+ * a string already terminated with '\0'. */
+ uint32_t len = xcb_glx_get_string_string_length(reply);
+ char *buf = Xmalloc(len);
+ memcpy(buf, xcb_glx_get_string_string(reply), len);
+ free(reply);
+
+ return buf;
+}
+
+#else
+
/**
* GLX protocol structure for the ficticious "GXLGenericGetString" request.
- *
+ *
* This is a non-existant protocol packet. It just so happens that all of
* the real protocol packets used to request a string from the server have
* an identical binary layout. The only difference between them is the
* meaning of the \c for_whom field and the value of the \c glxCode.
*/
-typedef struct GLXGenericGetString {
- CARD8 reqType;
- CARD8 glxCode;
- CARD16 length B16;
- CARD32 for_whom B32;
- CARD32 name B32;
+typedef struct GLXGenericGetString
+{
+ CARD8 reqType;
+ CARD8 glxCode;
+ CARD16 length B16;
+ CARD32 for_whom B32;
+ CARD32 name B32;
} xGLXGenericGetStringReq;
/* These defines are only needed to make the GetReq macro happy.
#define X_GLXGenericGetString 0
/**
- * Query the Server GLX string and cache it in the display private.
+ * Query the Server GLX string.
* This routine will allocate the necessay space for the string.
*/
-char *
-__glXGetStringFromServer( Display * dpy, int opcode, CARD32 glxCode,
- CARD32 for_whom, CARD32 name )
+static char *
+__glXGetStringFromServer(Display * dpy, int opcode, CARD32 glxCode,
+ CARD32 for_whom, CARD32 name)
{
- xGLXGenericGetStringReq *req;
- xGLXSingleReply reply;
- int length;
- int numbytes;
- char * buf;
+ xGLXGenericGetStringReq *req;
+ xGLXSingleReply reply;
+ int length;
+ int numbytes;
+ char *buf;
+
+
+ LockDisplay(dpy);
- LockDisplay( dpy );
+ /* All of the GLX protocol requests for getting a string from the server
+ * look the same. The exact meaning of the for_whom field is usually
+ * either the screen number (for glXQueryServerString) or the context tag
+ * (for GLXSingle).
+ */
+ GetReq(GLXGenericGetString, req);
+ req->reqType = opcode;
+ req->glxCode = glxCode;
+ req->for_whom = for_whom;
+ req->name = name;
- /* All of the GLX protocol requests for getting a string from the server
- * look the same. The exact meaning of the for_whom field is usually
- * either the screen number (for glXQueryServerString) or the context tag
- * (for GLXSingle).
- */
+ _XReply(dpy, (xReply *) & reply, 0, False);
- GetReq( GLXGenericGetString, req );
- req->reqType = opcode;
- req->glxCode = glxCode;
- req->for_whom = for_whom;
- req->name = name;
+ length = reply.length * 4;
+ numbytes = reply.size;
- _XReply( dpy, (xReply *) & reply, 0, False );
+ buf = (char *) Xmalloc(numbytes);
+ if (buf != NULL) {
+ _XRead(dpy, buf, numbytes);
+ length -= numbytes;
+ }
- length = reply.length * 4;
- numbytes = reply.size;
+ _XEatData(dpy, length);
- buf = (char *) Xmalloc( numbytes );
- if ( buf != NULL ) {
- _XRead( dpy, buf, numbytes );
- length -= numbytes;
- }
+ UnlockDisplay(dpy);
+ SyncHandle();
- _XEatData( dpy, length );
+ return buf;
+}
- UnlockDisplay( dpy );
- SyncHandle();
+char *
+__glXQueryServerString(Display * dpy, int opcode, CARD32 screen, CARD32 name)
+{
+ return __glXGetStringFromServer(dpy, opcode,
+ X_GLXQueryServerString, screen, name);
+}
- return buf;
+char *
+__glXGetString(Display * dpy, int opcode, CARD32 contextTag, CARD32 name)
+{
+ return __glXGetStringFromServer(dpy, opcode, X_GLsop_GetString,
+ contextTag, name);
}
+
+#endif /* USE_XCB */
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