Retire miniglx and move the actual glx code up to src/glx

[mesa.git] / src / glx / glx_query.c

diff --git a/src/glx/glx_query.c b/src/glx/glx_query.c
new file mode 100644 (file)
index 0000000..efad13d
--- /dev/null
+++ b/src/glx/glx_query.c
@@ -0,0 +1,177 @@
+/*
+ * (C) Copyright IBM Corporation 2004
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \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;
+} xGLXGenericGetStringReq;
+
+/* These defines are only needed to make the GetReq macro happy.
+ */
+#define sz_xGLXGenericGetStringReq 12
+#define X_GLXGenericGetString 0
+
+/**
+ * Query the Server GLX string.
+ * This routine will allocate the necessay space for the string.
+ */
+static char *
+__glXGetStringFromServer(Display * dpy, int opcode, CARD32 glxCode,
+                         CARD32 for_whom, CARD32 name)
+{
+   xGLXGenericGetStringReq *req;
+   xGLXSingleReply reply;
+   int length;
+   int numbytes;
+   char *buf;
+
+
+   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;
+
+   _XReply(dpy, (xReply *) & reply, 0, False);
+
+   length = reply.length * 4;
+   numbytes = reply.size;
+
+   buf = (char *) Xmalloc(numbytes);
+   if (buf != NULL) {
+      _XRead(dpy, buf, numbytes);
+      length -= numbytes;
+   }
+
+   _XEatData(dpy, length);
+
+   UnlockDisplay(dpy);
+   SyncHandle();
+
+   return buf;
+}
+
+char *
+__glXQueryServerString(Display * dpy, int opcode, CARD32 screen, CARD32 name)
+{
+   return __glXGetStringFromServer(dpy, opcode,
+                                   X_GLXQueryServerString, screen, name);
+}
+
+char *
+__glXGetString(Display * dpy, int opcode, CARD32 contextTag, CARD32 name)
+{
+   return __glXGetStringFromServer(dpy, opcode, X_GLsop_GetString,
+                                   contextTag, name);
+}
+
+#endif /* USE_XCB */