5aa41d849c2e4e5c42e9c949e1b6743148905f81
kent
  Thu Jun 17 16:46:30 2010 -0700
Rearranging things so that hgTracks.c module is not so severely changed by the web service stuff.
diff --git src/hg/hgTracks/renderMain.c src/hg/hgTracks/renderMain.c
new file mode 100644
index 0000000..e29d07b
--- /dev/null
+++ src/hg/hgTracks/renderMain.c
@@ -0,0 +1,105 @@
+/* hgTrackRender - execute enough of browser to render one track. */
+
+#include "common.h"
+#include "linefile.h"
+#include "hash.h"
+#include "htmshell.h"
+#include "errabort.h"
+#include "portable.h"
+#include "cheapcgi.h"
+#include "ra.h"
+#include "hdb.h"
+#include "hgTracks.h"
+
+static void usage()
+/* Print out usage and exit - just temporary. */
+{
+errAbort(
+"hgTrackRender - execute enough of browser to render one track.\n"
+"usage:\n"
+"      hgTrackRender track.ra cart.ra output.ps\n"
+"where track.ra is a trackDb.ra entry flattened out to include stuff inherited from parent\n"
+"and cart.ra is a file with the cart settings.  Both .ra files should just have a single stanza\n"
+);
+}
+
+struct track *trackFromSettingsHash(struct hash *settings)
+/* Wrap a trackDb, and then a track around settings, and return track. */
+{
+struct trackDb *tdb = trackDbNew();
+tdb->settingsHash = settings;
+tdb->track = hashMustFindVal(settings, "track");
+trackDbFieldsFromSettings(tdb);
+trackDbAddTableField(tdb);
+return trackFromTrackDb(tdb);
+}
+
+static void hgTrackRenderFromCommandLine(char *trackFile, char *cartFile, char *outFile)
+/* Generate tracks from trackFile and cart from cartFile, both in .ra format.  Then
+ * call makeActiveImage, the heart of the genome browser.*/
+{
+struct track *track, *trackList = NULL;
+
+/* Load in cart file into a single hash and then wrap a cart around it. 
+ * We need to set cart before we can make tracks. */
+struct hash *cartHash = raReadSingle(cartFile);
+cart = cartFromHash(cartHash);
+database = hashMustFindVal(cartHash, "db");
+position = cloneString(hashMustFindVal(cartHash, "position"));
+if (!hgParseChromRange(NULL, position, &chromName, &winStart, &winEnd))
+    errAbort("position not in chrom:start-end format");
+
+uglyf("Got %d vars in %s\n", cartHash->elCount, cartFile);
+
+/* Initialize layout. */
+initTl();
+setLayoutGlobals();
+
+/* Make list of tracks out of track file. */
+struct lineFile *lf = lineFileOpen(trackFile, TRUE);
+struct hash *trackRa;
+while ((trackRa = raNextRecord(lf)) != NULL)
+    {
+    track = trackFromSettingsHash(trackRa);
+    slAddHead(&trackList, track);
+    }
+slReverse(&trackList);
+lineFileClose(&lf);
+uglyf("Got %d tracks in %s\n", slCount(trackList), trackFile);
+
+/* Prepare track list for drawing. */
+for (track = trackList; track != NULL; track = track->next)
+    {
+    track->loadItems(track);
+    uglyf("%s has %d items\n", track->track, slCount(track->items));
+    }
+makeActiveImage(trackList, outFile);
+}
+
+int main(int argc, char *argv[])
+{
+/* Set up some timing since we're trying to optimize things very often. */
+long enteredMainTime = clock1000();
+uglyTime(NULL);
+measureTiming = TRUE;
+
+/* 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);
+
+if (argc != 4)
+    usage();
+
+hgTrackRenderFromCommandLine(argv[1], argv[2], argv[3]);
+
+if (measureTiming)
+    {
+    fprintf(stdout, "Overall total time: %ld millis<BR>\n",
+    clock1000() - enteredMainTime);
+    }
+return 0;
+}