GLX: Add a per-client vendor mapping.

Each client now has its own (screen, vendor) mapping.

Currently, it's just a copy of the global mapping, but later changes will allow
it to change.

Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
(cherry picked from commit 37a36a6b5b)

glx/vndext.c

@@ -139,8 +139,17 @@ GlxGetClientData(ClientPtr client)
 {
     GlxClientPriv *cl = xglvGetClientPrivate(client);
     if (cl == NULL) {
-        cl = calloc(1, sizeof(GlxClientPriv));
+        cl = calloc(1, sizeof(GlxClientPriv)
+                + screenInfo.numScreens * sizeof(GlxServerVendor *));
         if (cl != NULL) {
+            int i;
+
+            cl->vendors = (GlxServerVendor **) (cl + 1);
+            for (i=0; i<screenInfo.numScreens; i++)
+            {
+                cl->vendors[i] = GlxGetVendorForScreen(NULL, screenInfo.screens[i]);
+            }
+
             xglvSetClientPrivate(client, cl);
         }
     }

glx/vndserver.h

@@ -57,6 +57,11 @@ typedef struct GlxContextTagInfoRec {
 typedef struct GlxClientPrivRec {
     GlxContextTagInfo *contextTags;
     unsigned int contextTagCount;
+
+    /**
+     * The vendor handles for each screen.
+     */
+    GlxServerVendor **vendors;
 } GlxClientPriv;
 
 extern int GlxErrorBase;

glx/vndservermapping.c

@@ -187,10 +187,21 @@ Bool GlxSetScreenVendor(ScreenPtr screen, GlxServerVendor *vendor)
 
 GlxServerVendor *GlxGetVendorForScreen(ClientPtr client, ScreenPtr screen)
 {
-    GlxScreenPriv *priv = GlxGetScreen(screen);
+    // Note that the client won't be sending GPU screen numbers, so we don't
-    if (priv != NULL) {
+    // need per-client mappings for them.
-        return priv->vendor;
+    if (client != NULL && !screen->isGPU) {
+        GlxClientPriv *cl = GlxGetClientData(client);
+        if (cl != NULL) {
+            return cl->vendors[screen->myNum];
+        } else {
+            return NULL;
+        }
     } else {
-        return NULL;
+        GlxScreenPriv *priv = GlxGetScreen(screen);
+        if (priv != NULL) {
+            return priv->vendor;
+        } else {
+            return NULL;
+        }
     }
 }