Change old PRG to be SkLCGRandom; change new one to SkRandom

bench/ChartBench.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBenchmark.h"
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkRandom.h"
 
 /**
  * This is a conversion of samplecode/SampleChart.cpp into a bench. It sure would be nice to be able
  * to write one subclass that can be a GM, bench, and/or Sample.
  */
 
 namespace {
 
 // Generates y values for the chart plots.
 void gen_data(SkScalar yAvg, SkScalar ySpread, int count, SkTDArray<SkScalar>* dataPts) {
     dataPts->setCount(count);
-    static SkMWCRandom gRandom;
+    static SkRandom gRandom;
     for (int i = 0; i < count; ++i) {
         (*dataPts)[i] = gRandom.nextRangeScalar(yAvg - SkScalarHalf(ySpread),
                                                 yAvg + SkScalarHalf(ySpread));
     }
 }
 
 // Generates a path to stroke along the top of each plot and a fill path for the area below each
 // plot. The fill path is bounded below by the bottomData plot points or a horizontal line at
 // yBase if bottomData == NULL.
 // The plots are animated by rotating the data points by leftShift.
@@ skipping 89 matching lines @@
                 SkScalar y = (kNumGraphs - i) * (height - ySpread) / (kNumGraphs + 1);
                 fData[i].reset();
                 gen_data(y, ySpread, dataPointCount, fData + i);
             }
         }
 
         for (int frame = 0; frame < kFramesPerRun; ++frame) {
 
             canvas->clear(0xFFE0F0E0);
 
-            static SkMWCRandom colorRand;
+            static SkRandom colorRand;
             static SkColor gColors[kNumGraphs] = { 0x0 };
             if (0 == gColors[0]) {
                 for (int i = 0; i < kNumGraphs; ++i) {
                     gColors[i] = colorRand.nextU() | 0xff000000;
                 }
             }
 
             SkPath plotPath;
             SkPath fillPath;
 
@@ skipping 49 matching lines @@
     typedef SkBenchmark INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkBenchmark* Fact0(void* p) { return new ChartBench(p, true); }
 static SkBenchmark* Fact1(void* p) { return new ChartBench(p, false); }
 
 static BenchRegistry gReg0(Fact0);
 static BenchRegistry gReg1(Fact1);