1 2 /* 3 * Copyright 2006 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #include "SkDisplayRandom.h" 11 #include "SkInterpolator.h" 12 13 enum SkDisplayRandom_Properties { 14 SK_PROPERTY(random), 15 SK_PROPERTY(seed) 16 }; 17 18 #if SK_USE_CONDENSED_INFO == 0 19 20 const SkMemberInfo SkDisplayRandom::fInfo[] = { 21 SK_MEMBER(blend, Float), 22 SK_MEMBER(max, Float), 23 SK_MEMBER(min, Float), 24 SK_MEMBER_DYNAMIC_PROPERTY(random, Float), 25 SK_MEMBER_PROPERTY(seed, Int) 26 }; 27 28 #endif 29 30 DEFINE_GET_MEMBER(SkDisplayRandom); 31 32 SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) { 33 } 34 35 #ifdef SK_DUMP_ENABLED 36 void SkDisplayRandom::dump(SkAnimateMaker* maker) { 37 dumpBase(maker); 38 SkDebugf("min=\"%g\" ", SkScalarToFloat(min)); 39 SkDebugf("max=\"%g\" ", SkScalarToFloat(max)); 40 SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend)); 41 SkDebugf("/>\n"); 42 } 43 #endif 44 45 bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const { 46 switch(index) { 47 case SK_PROPERTY(random): { 48 SkScalar random = fRandom.nextUScalar1(); 49 SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend); 50 value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT); 51 value->fType = SkType_Float; 52 return true; 53 } 54 default: 55 SkASSERT(0); 56 } 57 return false; 58 } 59 60 bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) { 61 SkASSERT(index == SK_PROPERTY(seed)); 62 SkASSERT(value.fType == SkType_Int); 63 fRandom.setSeed(value.fOperand.fS32); 64 return true; 65 } 66
