Add text animation sample; tweak DrawShip sample

samplecode/SampleApp.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 "SampleApp.h"
 
 #include "OverView.h"
@@ skipping 1785 matching lines @@
     this->inval(nullptr);
 }
 
 void SampleWindow::toggleFPS() {
     fMeasureFPS = !fMeasureFPS;
     this->updateTitle();
     this->inval(nullptr);
 }
 
 void SampleWindow::toggleDistanceFieldFonts() {
+    // reset backend
+    fDevManager->tearDownBackend(this);
+    fDevManager->setUpBackend(this, fMSAASampleCount);
+
     SkSurfaceProps props = this->getSurfaceProps();
     uint32_t flags = props.flags() ^ SkSurfaceProps::kUseDeviceIndependentFonts_Flag;
     this->setSurfaceProps(SkSurfaceProps(flags, props.pixelGeometry()));
 
     this->updateTitle();
     this->inval(nullptr);
 }
 
 #include "SkDumpCanvas.h"
 
@@ skipping 587 matching lines @@
 #ifdef SK_BUILD_FOR_MAC
     setenv("ANDROID_ROOT", "/android/device/data", 0);
 #endif
     SkGraphics::Init();
     SkEvent::Init();
 }
 
 void application_term() {
     SkEvent::Term();
 }