use murmur3 finisher to improve font hash efficiency

samplecode/SamplePictFile.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SampleCode.h"
 #include "SkDumpCanvas.h"
 #include "SkView.h"
@@ skipping 12 matching lines @@
 #include "SkColorPriv.h"
 #include "SkColorFilter.h"
 #include "SkTime.h"
 #include "SkTypeface.h"
 #include "SkXfermode.h"
 
 #include "SkStream.h"
 #include "SkSurface.h"
 #include "SkXMLParser.h"
 
+#include "SkGlyphCache.h"
+
 class PictFileView : public SampleView {
 public:
     PictFileView(const char name[] = NULL)
         : fFilename(name)
         , fBBox(kNo_BBoxType)
         , fTileSize(SkSize::Make(0, 0)) {
         for (int i = 0; i < kBBoxTypeCount; ++i) {
             fPictures[i] = NULL;
         }
     }
@@ skipping 39 matching lines @@
             fBBox = (BBoxType)((fBBox + 1) % kBBoxTypeCount);
             return true;
         }
         return this->INHERITED::onEvent(evt);
     }
 
     void onDrawContent(SkCanvas* canvas) SK_OVERRIDE {
         SkASSERT(static_cast<int>(fBBox) < kBBoxTypeCount);
         SkPicture** picture = fPictures + fBBox;
 
+#ifdef SK_GLYPHCACHE_TRACK_HASH_STATS
+        SkGraphics::PurgeFontCache();
+#endif
+
         if (!*picture) {
             *picture = LoadPicture(fFilename.c_str(), fBBox);
         }
         if (*picture) {
             canvas->drawPicture(*picture);
         }
+
+#ifdef SK_GLYPHCACHE_TRACK_HASH_STATS
+        SkGlyphCache::Dump();
+        SkDebugf("\n");
+#endif
     }
 
 private:
     enum BBoxType {
         kNo_BBoxType,
         kRTree_BBoxType,
 
         kLast_BBoxType = kRTree_BBoxType,
     };
     static const int kBBoxTypeCount = kLast_BBoxType + 1;
@@ skipping 67 matching lines @@
 SampleView* CreateSamplePictFileView(const char filename[]) {
     return new PictFileView(filename);
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 #if 0
 static SkView* MyFactory() { return new PictFileView; }
 static SkViewRegister reg(MyFactory);
 #endif