1 files changed, 60 insertions, 26 deletions

diff --git a/extras/Mesa/src/mesa/drivers/dri/common/dri_util.c b/extras/Mesa/src/mesa/drivers/dri/common/dri_util.c
index dd83080cc..88caa34e9 100644
--- a/extras/Mesa/src/mesa/drivers/dri/common/dri_util.c
+++ b/extras/Mesa/src/mesa/drivers/dri/common/dri_util.c
@@ -141,6 +141,26 @@ __driUtilMessage(const char *f, ...)
     }
 }
 
+/*
+ * fd.o bug #1713: Some rare libGL's have __glXFindDRIScreen defined but do not
+ * export it via glXGetProcAddress.  These are not supported anymore, so print
+ * an error message to that effect.  - ajax 2004-10-26
+ */
+typedef __DRIscreen *(*PFNGLXFINDDRISCREEN)(__DRInativeDisplay *, int);
+
+static __DRIscreen *glx_find_dri_screen(__DRInativeDisplay *d, int i)
+{
+    PFNGLXFINDDRISCREEN findscreen = 
+        (PFNGLXFINDDRISCREEN)glXGetProcAddress("__glXFindDRIScreen");
+
+    if (!findscreen)
+    {
+        __driUtilMessage("glXGetProcAddress(\"__glXFindDRIScreen\") failed!");
+        __driUtilMessage("Your libGL is too old, please upgrade.");
+        return NULL;
+    }
+    else return findscreen(d, i);
+}
 
 /*****************************************************************/
 /** \name Visual utility functions                               */
@@ -212,23 +232,33 @@ static GLboolean __driAddDrawable(void *drawHash, __DRIdrawable *pdraw)
 static __DRIdrawable *__driFindDrawable(void *drawHash, __DRIid draw)
 {
     int retcode;
-    __DRIdrawable *pdraw;
+    union 
+    {
+	__DRIdrawable *pdraw;
+	void *ptr;
+    } p;
 
-    retcode = drmHashLookup(drawHash, draw, (void **)&pdraw);
+    retcode = drmHashLookup(drawHash, draw, &p.ptr);
     if (retcode)
 	return NULL;
 
-    return pdraw;
+    return p.pdraw;
 }
 
 static void __driRemoveDrawable(void *drawHash, __DRIdrawable *pdraw)
 {
     int retcode;
-    __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private;
+    union 
+    {
+	__DRIdrawablePrivate *pdp;
+	void *ptr;
+    } p;
+
+    p.pdp = (__DRIdrawablePrivate *)pdraw->private;
 
-    retcode = drmHashLookup(drawHash, pdp->draw, (void **)&pdraw);
+    retcode = drmHashLookup(drawHash, p.pdp->draw, &p.ptr);
     if (!retcode) { /* Found */
-	drmHashDelete(drawHash, pdp->draw);
+	drmHashDelete(drawHash, p.pdp->draw);
     }
 }
 
@@ -286,21 +316,25 @@ static GLboolean __driWindowExists(Display *dpy, GLXDrawable draw)
 static void __driGarbageCollectDrawables(void *drawHash)
 {
     __DRIid draw;
-    __DRIdrawable *pdraw;
     __DRInativeDisplay *dpy;
+    union 
+    {
+	__DRIdrawable *pdraw;
+	void *ptr;
+    } p;
 
-    if (drmHashFirst(drawHash, &draw, (void **)&pdraw)) {
+    if (drmHashFirst(drawHash, &draw, &p.ptr)) {
 	do {
-	    __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)pdraw->private;
+	    __DRIdrawablePrivate *pdp = (__DRIdrawablePrivate *)p.pdraw->private;
 	    dpy = pdp->driScreenPriv->display;
 	    if (! (*window_exists)(dpy, draw)) {
 		/* Destroy the local drawable data in the hash table, if the
 		   drawable no longer exists in the Xserver */
-		__driRemoveDrawable(drawHash, pdraw);
-		(*pdraw->destroyDrawable)(dpy, pdraw->private);
-		_mesa_free(pdraw);
+		__driRemoveDrawable(drawHash, p.pdraw);
+		(*p.pdraw->destroyDrawable)(dpy, p.pdraw->private);
+		_mesa_free(p.pdraw);
 	    }
-	} while (drmHashNext(drawHash, &draw, (void **)&pdraw));
+	} while (drmHashNext(drawHash, &draw, &p.ptr));
     }
 }
 
@@ -353,7 +387,7 @@ static GLboolean driUnbindContext3(__DRInativeDisplay *dpy, int scrn,
 	return GL_FALSE;
     }
 
-    pDRIScreen = __glXFindDRIScreen(dpy, scrn);
+    pDRIScreen = glx_find_dri_screen(dpy, scrn);
     if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
 	/* ERROR!!! */
 	return GL_FALSE;
@@ -529,7 +563,7 @@ static GLboolean driBindContext3(__DRInativeDisplay *dpy, int scrn,
 	return GL_FALSE;
     }
 
-    pDRIScreen = __glXFindDRIScreen(dpy, scrn);
+    pDRIScreen = glx_find_dri_screen(dpy, scrn);
     if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
 	/* ERROR!!! */
 	return GL_FALSE;
@@ -563,7 +597,7 @@ static GLboolean driBindContext2(Display *dpy, int scrn,
 	return GL_FALSE;
     }
 
-    pDRIScreen = __glXFindDRIScreen(dpy, scrn);
+    pDRIScreen = glx_find_dri_screen(dpy, scrn);
     modes = (driCompareGLXAPIVersion( 20040317 ) >= 0)
 	? gc->driContext.mode
 	: findConfigMode( dpy, scrn, gc->vid, pDRIScreen );
@@ -793,7 +827,7 @@ static void *driCreateNewDrawable(__DRInativeDisplay *dpy,
 				  int renderType,
 				  const int *attrs)
 {
-    __DRIscreen * const pDRIScreen = __glXFindDRIScreen(dpy, modes->screen);
+    __DRIscreen * const pDRIScreen = glx_find_dri_screen(dpy, modes->screen);
     __DRIscreenPrivate *psp;
     __DRIdrawablePrivate *pdp;
 
@@ -848,7 +882,7 @@ static void *driCreateNewDrawable(__DRInativeDisplay *dpy,
 	_mesa_free(pdp);
 	return NULL;
 #else
-	pdp->getInfo = XF86DRIGetDrawableInfo;
+	pdp->getInfo = (PFNGLXGETDRAWABLEINFOPROC) XF86DRIGetDrawableInfo;
 #endif /* DRI_NEW_INTERFACE_ONLY */
     }
 
@@ -988,7 +1022,7 @@ driCreateNewContext(__DRInativeDisplay *dpy, const __GLcontextModes *modes,
     __DRIscreenPrivate *psp;
     void * const shareCtx = (pshare != NULL) ? pshare->driverPrivate : NULL;
 
-    pDRIScreen = __glXFindDRIScreen(dpy, modes->screen);
+    pDRIScreen = glx_find_dri_screen(dpy, modes->screen);
     if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
 	/* ERROR!!! */
 	return NULL;
@@ -1033,16 +1067,16 @@ driCreateNewContext(__DRInativeDisplay *dpy, const __GLcontextModes *modes,
     pctx->bindContext3   = driBindContext3;
     pctx->unbindContext3 = driUnbindContext3;
 #else
-    pctx->bindContext    = driBindContext;
-    pctx->unbindContext  = driUnbindContext;
+    pctx->bindContext    = (void *)driBindContext;
+    pctx->unbindContext  = (void *)driUnbindContext;
     if ( driCompareGLXAPIVersion( 20030606 ) >= 0 ) {
-        pctx->bindContext2   = driBindContext2;
-        pctx->unbindContext2 = driUnbindContext2;
+        pctx->bindContext2   = (void *)driBindContext2;
+        pctx->unbindContext2 = (void *)driUnbindContext2;
     }
 
     if ( driCompareGLXAPIVersion( 20040415 ) >= 0 ) {
-        pctx->bindContext3   = driBindContext3;
-        pctx->unbindContext3 = driUnbindContext3;
+        pctx->bindContext3   = (void *)driBindContext3;
+        pctx->unbindContext3 = (void *)driUnbindContext3;
     }
 #endif
 
@@ -1088,7 +1122,7 @@ static void *driCreateContext(Display *dpy, XVisualInfo *vis,
     __DRIscreen *pDRIScreen;
     const __GLcontextModes *modes;
 
-    pDRIScreen = __glXFindDRIScreen(dpy, vis->screen);
+    pDRIScreen = glx_find_dri_screen(dpy, vis->screen);
     if ( (pDRIScreen == NULL) || (pDRIScreen->private == NULL) ) {
 	/* ERROR!!! */
 	return NULL;