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 13enum SkDisplayRandom_Properties { 14 SK_PROPERTY(random), 15 SK_PROPERTY(seed) 16}; 17 18#if SK_USE_CONDENSED_INFO == 0 19 20const 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 30DEFINE_GET_MEMBER(SkDisplayRandom); 31 32SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) { 33} 34 35#ifdef SK_DUMP_ENABLED 36void SkDisplayRandom::dump(SkAnimateMaker* maker) { 37 dumpBase(maker); 38#ifdef SK_CAN_USE_FLOAT 39 SkDebugf("min=\"%g\" ", SkScalarToFloat(min)); 40 SkDebugf("max=\"%g\" ", SkScalarToFloat(max)); 41 SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend)); 42#else 43 SkDebugf("min=\"%x\" ", min); 44 SkDebugf("max=\"%x\" ", max); 45 SkDebugf("blend=\"%x\" ", blend); 46#endif 47 SkDebugf("/>\n"); 48} 49#endif 50 51bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const { 52 switch(index) { 53 case SK_PROPERTY(random): { 54 SkScalar random = fRandom.nextUScalar1(); 55 SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend); 56 value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT); 57 value->fType = SkType_Float; 58 return true; 59 } 60 default: 61 SkASSERT(0); 62 } 63 return false; 64} 65 66bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) { 67 SkASSERT(index == SK_PROPERTY(seed)); 68 SkASSERT(value.fType == SkType_Int); 69 fRandom.setSeed(value.fOperand.fS32); 70 return true; 71} 72 73