4 files changed, 35 insertions, 1 deletions
diff --git a/glx/vndext.c b/glx/vndext.c
index 20c0648cc..582e60b6e 100644
--- a/glx/vndext.c
+++ b/glx/vndext.c
@@ -324,6 +324,7 @@ _X_EXPORT const GlxServerExports glxServer = {
     .getContextTagPrivate = GlxGetContextTagPrivate,
     .getVendorForScreen = GlxGetVendorForScreen,
     .forwardRequest =  GlxForwardRequest,
+    .setClientScreenVendor = GlxSetClientScreenVendor,
 };
 
 const GlxServerExports *
diff --git a/glx/vndserver.h b/glx/vndserver.h
index 613fef0fe..772b458a1 100644
--- a/glx/vndserver.h
+++ b/glx/vndserver.h
@@ -107,6 +107,7 @@ GlxContextTagInfo *GlxLookupContextTag(ClientPtr client, GLXContextTag tag);
 void GlxFreeContextTag(GlxContextTagInfo *tagInfo);
 
 Bool GlxSetScreenVendor(ScreenPtr screen, GlxServerVendor *vendor);
+Bool GlxSetClientScreenVendor(ClientPtr client, ScreenPtr screen, GlxServerVendor *vendor);
 GlxScreenPriv *GlxGetScreen(ScreenPtr pScreen);
 GlxServerVendor *GlxGetVendorForScreen(ClientPtr client, ScreenPtr screen);
 
diff --git a/glx/vndservermapping.c b/glx/vndservermapping.c
index 4efab8b81..04788ffbd 100644
--- a/glx/vndservermapping.c
+++ b/glx/vndservermapping.c
@@ -189,6 +189,27 @@ Bool GlxSetScreenVendor(ScreenPtr screen, GlxServerVendor *vendor)
     return TRUE;
 }
 
+Bool GlxSetClientScreenVendor(ClientPtr client, ScreenPtr screen, GlxServerVendor *vendor)
+{
+    GlxClientPriv *cl;
+
+    if (screen == NULL || screen->isGPU) {
+        return FALSE;
+    }
+
+    cl = GlxGetClientData(client);
+    if (cl == NULL) {
+        return FALSE;
+    }
+
+    if (vendor != NULL) {
+        cl->vendors[screen->myNum] = vendor;
+    } else {
+        cl->vendors[screen->myNum] = GlxGetVendorForScreen(NULL, screen);
+    }
+    return TRUE;
+}
+
 GlxServerVendor *GlxGetVendorForScreen(ClientPtr client, ScreenPtr screen)
 {
     // Note that the client won't be sending GPU screen numbers, so we don't
diff --git a/include/glxvndabi.h b/include/glxvndabi.h
index b78306d23..71f36e722 100644
--- a/include/glxvndabi.h
+++ b/include/glxvndabi.h
@@ -75,7 +75,7 @@
  * will still work.
  */
 #define GLXSERVER_VENDOR_ABI_MAJOR_VERSION 0
-#define GLXSERVER_VENDOR_ABI_MINOR_VERSION 0
+#define GLXSERVER_VENDOR_ABI_MINOR_VERSION 1
 
 #if defined(__cplusplus)
 extern "C" {
@@ -236,6 +236,17 @@ typedef struct GlxServerExportsRec {
      * \param client The client.
      */
     int (* forwardRequest) (GlxServerVendor *vendor, ClientPtr client);
+
+    /**
+     * Sets the vendor library to use for a screen for a specific client.
+     *
+     * This function changes which vendor should handle GLX requests for a
+     * screen. Unlike \c setScreenVendor, this function can be called at any
+     * time, and only applies to requests from a single client.
+     *
+     * This function is available in GLXVND version 0.1 or later.
+     */
+    Bool (* setClientScreenVendor) (ClientPtr client, ScreenPtr screen, GlxServerVendor *vendor);
 } GlxServerExports;
 
 extern _X_EXPORT const GlxServerExports glxServer;