Make SkRandom::next[US]Fixed1 private; update documentation for SkRandom::nextSScalar1.

src/effects/SkDiscretePathEffect.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkDiscretePathEffect.h"
 #include "SkReadBuffer.h"
@@ skipping 29 matching lines @@
     Copied from the original implementation of SkRandom. Only contains the
     methods used by SkDiscretePathEffect::filterPath, with methods that were
     not called directly moved to private.
 */
 
 class LCGRandom {
 public:
     LCGRandom(uint32_t seed) : fSeed(seed) {}
 
     /** Return the next pseudo random number expressed as a SkScalar
-        in the range (-SK_Scalar1..SK_Scalar1).
+        in the range [-SK_Scalar1..SK_Scalar1).
     */
     SkScalar nextSScalar1() { return SkFixedToScalar(this->nextSFixed1()); }
 
 private:
     /** Return the next pseudo random number as an unsigned 32bit value.
     */
     uint32_t nextU() { uint32_t r = fSeed * kMul + kAdd; fSeed = r; return r; }
 
     /** Return the next pseudo random number as a signed 32bit value.
      */
     int32_t nextS() { return (int32_t)this->nextU(); }
 
     /** Return the next pseudo random number expressed as a signed SkFixed
-     in the range (-SK_Fixed1..SK_Fixed1).
+     in the range [-SK_Fixed1..SK_Fixed1).
      */
     SkFixed nextSFixed1() { return this->nextS() >> 15; }
 
     //  See "Numerical Recipes in C", 1992 page 284 for these constants
     enum {
         kMul = 1664525,
         kAdd = 1013904223
     };
     uint32_t fSeed;
 };
@@ skipping 59 matching lines @@
     buffer.writeUInt(fSeedAssist);
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkDiscretePathEffect::toString(SkString* str) const {
     str->appendf("SkDiscretePathEffect: (");
     str->appendf("segLength: %.2f deviation: %.2f seed %d", fSegLength, fPerterb, fSeedAssist);
     str->append(")");
 }
 #endif