ec3ed6a5eb
I have manually examined all of these diffs and restored a few files that seem to require manual adjustment. The following files still need to be modified manually, in a separate CL: android_sample/SampleApp/AndroidManifest.xml android_sample/SampleApp/res/layout/layout.xml android_sample/SampleApp/res/menu/sample.xml android_sample/SampleApp/res/values/strings.xml android_sample/SampleApp/src/com/skia/sampleapp/SampleApp.java android_sample/SampleApp/src/com/skia/sampleapp/SampleView.java experimental/CiCarbonSampleMain.c experimental/CocoaDebugger/main.m experimental/FileReaderApp/main.m experimental/SimpleCocoaApp/main.m experimental/iOSSampleApp/Shared/SkAlertPrompt.h experimental/iOSSampleApp/Shared/SkAlertPrompt.m experimental/iOSSampleApp/SkiOSSampleApp-Base.xcconfig experimental/iOSSampleApp/SkiOSSampleApp-Debug.xcconfig experimental/iOSSampleApp/SkiOSSampleApp-Release.xcconfig gpu/src/android/GrGLDefaultInterface_android.cpp gyp/common.gypi gyp_skia include/ports/SkHarfBuzzFont.h include/views/SkOSWindow_wxwidgets.h make.bat make.py src/opts/memset.arm.S src/opts/memset16_neon.S src/opts/memset32_neon.S src/opts/opts_check_arm.cpp src/ports/SkDebug_brew.cpp src/ports/SkMemory_brew.cpp src/ports/SkOSFile_brew.cpp src/ports/SkXMLParser_empty.cpp src/utils/ios/SkImageDecoder_iOS.mm src/utils/ios/SkOSFile_iOS.mm src/utils/ios/SkStream_NSData.mm tests/FillPathTest.cpp Review URL: http://codereview.appspot.com/4816058 git-svn-id: http://skia.googlecode.com/svn/trunk@1982 2bbb7eff-a529-9590-31e7-b0007b416f81
56 lines
1.0 KiB
C++
56 lines
1.0 KiB
C++
|
|
/*
|
|
* Copyright 2010 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
|
|
|
|
#ifndef GrRandom_DEFINED
|
|
#define GrRandom_DEFINED
|
|
|
|
class GrRandom {
|
|
public:
|
|
GrRandom() : fSeed(0) {}
|
|
GrRandom(uint32_t seed) : fSeed(seed) {}
|
|
|
|
uint32_t seed() const { return fSeed; }
|
|
|
|
uint32_t nextU() {
|
|
fSeed = fSeed * kMUL + kADD;
|
|
return fSeed;
|
|
}
|
|
|
|
int32_t nextS() { return (int32_t)this->nextU(); }
|
|
|
|
/**
|
|
* Returns value [0...1) as a float
|
|
*/
|
|
float nextF() {
|
|
// const is 1 / (2^32 - 1)
|
|
return (float)(this->nextU() * 2.32830644e-10);
|
|
}
|
|
|
|
/**
|
|
* Returns value [min...max) as a float
|
|
*/
|
|
float nextF(float min, float max) {
|
|
return min + this->nextF() * (max - min);
|
|
}
|
|
|
|
private:
|
|
/*
|
|
* These constants taken from "Numerical Recipes in C", reprinted 1999
|
|
*/
|
|
enum {
|
|
kMUL = 1664525,
|
|
kADD = 1013904223
|
|
};
|
|
uint32_t fSeed;
|
|
};
|
|
|
|
#endif
|
|
|