595a77309470e686fcc507601793ce6ddc5f47da
larrym
  Fri Sep 16 15:40:49 2011 -0700
show assembly and position by default
diff --git src/hg/hgTracks/renderMain.c src/hg/hgTracks/renderMain.c
index bdb3486..37ea581 100644
--- src/hg/hgTracks/renderMain.c
+++ src/hg/hgTracks/renderMain.c
@@ -107,43 +107,53 @@
 {
 if(argc == 1)
     {
     // CGI call
 
     // htmlPushEarlyHandlers(); XXXX do I need to do this?
 
     hPrintDisable();
     oldVars = hashNew(10);
     struct cart *cart = cartForSession(hUserCookie(), excludeVars, oldVars);
 
     // setup approriate CGI variables which tell hgTracks code what to do.
     cartSetBoolean(cart, "hgt.trackImgOnly", TRUE);
     if(cartVarExists(cart, "jsonp"))
         {
+        // experimental code to support remote rendering via a jsonp callback
+        // e.g.: /cgi-bin/hgRenderTracks?track=bamMMS9MbutiPygmy&track=...&jsonp=remoteTrackCallback&postion=...&pix=800
         cartSetString(cart, "hgt.contentType", "jsonp");
         cartSetString(cart, "hgt.trackNameFilter", cartString(cart, "track"));
+        cartSetString(cart, cartString(cart, "track"), cartUsualString(cart, "vis", "pack"));
         }
     else
         {
+        // remote rendering of hgTracks PNG image based on contents of a session; caller may pass in a subset of
+        // hgTracks parameters: e.g. db, hgsid, pix, position and tracks with explicit visibilities (e.g. knownGene=pack).
+
         cartSetString(cart, "hgt.contentType", "png");
         cartSetBoolean(cart, "hgt.imageV1", TRUE);
+        if(!cartVarExists(cart, "hgt.baseShowAsm"))
+            cartSetBoolean(cart, "hgt.baseShowAsm", TRUE);
+        if(!cartVarExists(cart, "hgt.baseShowPos"))
+            cartSetBoolean(cart, "hgt.baseShowPos", TRUE);
         }
     doMiddle(cart);
     }
 else
     {
-    // XXXX remove this code ... well, maybe not - this still might be useful for a stand-alone renderer.
+    // XXXX remove this code ... well, maybe not - this still might be useful for a stand-alone remote renderer.
 
     // command line call
 
     /* Set up some timing since we're trying to optimize things very often. */
     long enteredMainTime = clock1000();
     verboseTimeInit();
     /* Push very early error handling - this is just
      * for the benefit of the cgiVarExists, which
      * somehow can't be moved effectively into doMiddle. */
     // htmlPushEarlyHandlers();
 
     /* Set up cgi vars from command line. */
     // cgiSpoof(&argc, argv);
     optionInit(&argc, argv, options);