Merge commit 'origin/master' into gallium-0.2

5 files changed, 163 insertions, 23 deletions

diff --git a/src/glx/x11/glx_query.c b/src/glx/x11/glx_query.c
index 56f3495186..2789b841b1 100644
--- a/src/glx/x11/glx_query.c
+++ b/src/glx/x11/glx_query.c
@@ -31,6 +31,70 @@
 
 #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.
  * 
@@ -57,7 +121,7 @@ typedef struct GLXGenericGetString
  * Query the Server GLX string.
  * This routine will allocate the necessay space for the string.
  */
-char *
+static char *
 __glXGetStringFromServer(Display * dpy, int opcode, CARD32 glxCode,
                          CARD32 for_whom, CARD32 name)
 {
@@ -101,3 +165,27 @@ __glXGetStringFromServer(Display * dpy, int opcode, CARD32 glxCode,
 
    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 */
+
diff --git a/src/glx/x11/glxclient.h b/src/glx/x11/glxclient.h
index 3b9076bdd7..467b0ebb7f 100644
--- a/src/glx/x11/glxclient.h
+++ b/src/glx/x11/glxclient.h
@@ -741,8 +741,10 @@ extern void _XSend(Display*, const void*, long);
 extern void __glXInitializeVisualConfigFromTags( __GLcontextModes *config,
     int count, const INT32 *bp, Bool tagged_only, Bool fbconfig_style_tags );
 
-extern char * __glXGetStringFromServer( Display * dpy, int opcode,
-    CARD32 glxCode, CARD32 for_whom, CARD32 name );
+extern char * __glXQueryServerString(Display* dpy, int opcode,
+                                     CARD32 screen, CARD32 name);
+extern char * __glXGetString(Display* dpy, int opcode,
+                             CARD32 screen, CARD32 name);
 
 extern char *__glXstrdup(const char *str);
 
diff --git a/src/glx/x11/glxcmds.c b/src/glx/x11/glxcmds.c
index 391e0be05e..1d373ed29d 100644
--- a/src/glx/x11/glxcmds.c
+++ b/src/glx/x11/glxcmds.c
@@ -44,6 +44,12 @@
 #include "xf86dri.h"
 #endif
 
+#if defined(USE_XCB)
+#include <X11/Xlib-xcb.h>
+#include <xcb/xcb.h>
+#include <xcb/glx.h>
+#endif
+
 static const char __glXGLXClientVendorName[] = "SGI";
 static const char __glXGLXClientVersion[] = "1.4";
 
@@ -749,8 +755,10 @@ PUBLIC void glXCopyContext(Display *dpy, GLXContext source,
  */
 static Bool __glXIsDirect(Display *dpy, GLXContextID contextID)
 {
+#if !defined(USE_XCB)
     xGLXIsDirectReq *req;
     xGLXIsDirectReply reply;
+#endif
     CARD8 opcode;
 
     opcode = __glXSetupForCommand(dpy);
@@ -758,6 +766,18 @@ static Bool __glXIsDirect(Display *dpy, GLXContextID contextID)
 	return GL_FALSE;
     }
 
+#ifdef USE_XCB
+   xcb_connection_t* c = XGetXCBConnection(dpy);
+   xcb_glx_is_direct_reply_t* reply =
+      xcb_glx_is_direct_reply(c,
+                              xcb_glx_is_direct(c, contextID),
+                              NULL);
+
+   const Bool is_direct = reply->is_direct ? True : False;
+   free(reply);
+
+   return is_direct;
+#else
     /* Send the glXIsDirect request */
     LockDisplay(dpy);
     GetReq(GLXIsDirect,req);
@@ -769,6 +789,7 @@ static Bool __glXIsDirect(Display *dpy, GLXContextID contextID)
     SyncHandle();
 
     return reply.isDirect;
+#endif /* USE_XCB */
 }
 
 /**
@@ -840,7 +861,6 @@ PUBLIC void glXDestroyGLXPixmap(Display *dpy, GLXPixmap glxpixmap)
 
 PUBLIC void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
 {
-    xGLXSwapBuffersReq *req;
     GLXContext gc;
     GLXContextTag tag;
     CARD8 opcode;
@@ -871,6 +891,13 @@ PUBLIC void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
 	tag = 0;
     }
 
+#ifdef USE_XCB
+    xcb_connection_t* c = XGetXCBConnection(dpy);
+    xcb_glx_swap_buffers(c, tag, drawable);
+    xcb_flush(c);
+#else
+    xGLXSwapBuffersReq *req;
+
     /* Send the glXSwapBuffers request */
     LockDisplay(dpy);
     GetReq(GLXSwapBuffers,req);
@@ -881,6 +908,7 @@ PUBLIC void glXSwapBuffers(Display *dpy, GLXDrawable drawable)
     UnlockDisplay(dpy);
     SyncHandle();
     XFlush(dpy);
+#endif /* USE_XCB */
 }
 
 
@@ -1314,9 +1342,8 @@ PUBLIC const char *glXQueryExtensionsString( Display *dpy, int screen )
 
     if (!psc->effectiveGLXexts) {
         if (!psc->serverGLXexts) {
-	    psc->serverGLXexts = __glXGetStringFromServer(dpy, priv->majorOpcode,
-					  	   X_GLXQueryServerString,
-					  	   screen, GLX_EXTENSIONS);
+           psc->serverGLXexts =
+              __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
 	}
 
 	__glXCalculateUsableExtensions(psc,
@@ -1371,8 +1398,7 @@ PUBLIC const char *glXQueryServerString( Display *dpy, int screen, int name )
     }
 
     if ( *str == NULL ) {
-	*str = __glXGetStringFromServer(dpy, priv->majorOpcode,
-					X_GLXQueryServerString, screen, name);
+       *str = __glXQueryServerString(dpy, priv->majorOpcode, screen, name);
     }
     
     return *str;
@@ -1380,9 +1406,18 @@ PUBLIC const char *glXQueryServerString( Display *dpy, int screen, int name )
 
 void __glXClientInfo (  Display *dpy, int opcode  )
 {
-    xGLXClientInfoReq *req;
-    int size;
     char * ext_str = __glXGetClientGLExtensionString();
+    int size = strlen( ext_str ) + 1;
+
+#ifdef USE_XCB
+   xcb_connection_t *c = XGetXCBConnection(dpy);
+   xcb_glx_client_info(c,
+                       GLX_MAJOR_VERSION,
+                       GLX_MINOR_VERSION,
+                       size,
+                       (const uint8_t *)ext_str);
+#else
+    xGLXClientInfoReq *req;
 
     /* Send the glXClientInfo request */
     LockDisplay(dpy);
@@ -1392,14 +1427,14 @@ void __glXClientInfo (  Display *dpy, int opcode  )
     req->major = GLX_MAJOR_VERSION;
     req->minor = GLX_MINOR_VERSION;
 
-    size = strlen( ext_str ) + 1;
     req->length += (size + 3) >> 2;
     req->numbytes = size;
     Data(dpy, ext_str, size);
 
     UnlockDisplay(dpy);
     SyncHandle();
-    
+#endif /* USE_XCB */
+
     Xfree( ext_str );
 }
 
diff --git a/src/glx/x11/glxext.c b/src/glx/x11/glxext.c
index b6bdbd52bb..be6edf9b19 100644
--- a/src/glx/x11/glxext.c
+++ b/src/glx/x11/glxext.c
@@ -139,7 +139,8 @@ XEXT_GENERATE_FIND_DISPLAY(__glXFindDisplay, __glXExtensionInfo,
 ** Free the per screen configs data as well as the array of
 ** __glXScreenConfigs.
 */
-     static void FreeScreenConfigs(__GLXdisplayPrivate * priv)
+static void
+FreeScreenConfigs(__GLXdisplayPrivate * priv)
 {
    __GLXscreenConfigs *psc;
    GLint i, screens;
@@ -221,6 +222,25 @@ __glXFreeDisplayPrivate(XExtData * extension)
 static Bool
 QueryVersion(Display * dpy, int opcode, int *major, int *minor)
 {
+#ifdef USE_XCB
+   xcb_connection_t *c = XGetXCBConnection(dpy);
+   xcb_glx_query_version_reply_t* reply =
+      xcb_glx_query_version_reply(c,
+                                  xcb_glx_query_version(c,
+                                                        GLX_MAJOR_VERSION,
+                                                        GLX_MINOR_VERSION),
+                                  NULL);
+
+   if(reply->major_version != GLX_MAJOR_VERSION)
+   {
+      free(reply);
+      return GL_FALSE;
+   }
+   *major = reply->major_version;
+   *minor = min(reply->minor_version, GLX_MINOR_VERSION);
+   free(reply);
+   return GL_TRUE;
+#else
    xGLXQueryVersionReq *req;
    xGLXQueryVersionReply reply;
 
@@ -245,6 +265,7 @@ QueryVersion(Display * dpy, int opcode, int *major, int *minor)
    *major = reply.majorVersion;
    *minor = min(reply.minorVersion, GLX_MINOR_VERSION);
    return GL_TRUE;
+#endif /* USE_XCB */
 }
 
 
@@ -529,9 +550,7 @@ getFBConfigs(Display * dpy, __GLXdisplayPrivate * priv, int screen)
    __GLXscreenConfigs *psc;
 
    psc = priv->screenConfigs + screen;
-   psc->serverGLXexts = __glXGetStringFromServer(dpy, priv->majorOpcode,
-                                                 X_GLXQueryServerString,
-                                                 screen, GLX_EXTENSIONS);
+   psc->serverGLXexts = __glXQueryServerString(dpy, priv->majorOpcode, screen, GLX_EXTENSIONS);
 
    LockDisplay(dpy);
 
@@ -589,9 +608,7 @@ AllocAndFetchScreenConfigs(Display * dpy, __GLXdisplayPrivate * priv)
    memset(psc, 0, screens * sizeof(__GLXscreenConfigs));
    priv->screenConfigs = psc;
 
-   priv->serverGLXversion = __glXGetStringFromServer(dpy, priv->majorOpcode,
-                                                     X_GLXQueryServerString,
-                                                     0, GLX_VERSION);
+   priv->serverGLXversion = __glXQueryServerString(dpy, priv->majorOpcode, 0, GLX_VERSION);
    if (priv->serverGLXversion == NULL) {
       FreeScreenConfigs(priv);
       return GL_FALSE;
diff --git a/src/glx/x11/single2.c b/src/glx/x11/single2.c
index 83a2505222..0b2d5113cc 100644
--- a/src/glx/x11/single2.c
+++ b/src/glx/x11/single2.c
@@ -679,9 +679,7 @@ __indirect_glGetString(GLenum name)
     */
 
    (void) __glXFlushRenderBuffer(gc, gc->pc);
-   s = (GLubyte *) __glXGetStringFromServer(dpy, gc->majorOpcode,
-                                            X_GLsop_GetString,
-                                            gc->currentContextTag, name);
+   s = (GLubyte *) __glXGetString(dpy, gc->majorOpcode, gc->currentContextTag, name);
    if (!s) {
       /* Throw data on the floor */
       __glXSetError(gc, GL_OUT_OF_MEMORY);