| /* libs/graphics/animator/SkDisplayRandom.cpp |
| ** |
| ** Copyright 2006, The Android Open Source Project |
| ** |
| ** Licensed under the Apache License, Version 2.0 (the "License"); |
| ** you may not use this file except in compliance with the License. |
| ** You may obtain a copy of the License at |
| ** |
| ** http://www.apache.org/licenses/LICENSE-2.0 |
| ** |
| ** Unless required by applicable law or agreed to in writing, software |
| ** distributed under the License is distributed on an "AS IS" BASIS, |
| ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| ** See the License for the specific language governing permissions and |
| ** limitations under the License. |
| */ |
| |
| #include "SkDisplayRandom.h" |
| #include "SkInterpolator.h" |
| |
| enum SkDisplayRandom_Properties { |
| SK_PROPERTY(random), |
| SK_PROPERTY(seed) |
| }; |
| |
| #if SK_USE_CONDENSED_INFO == 0 |
| |
| const SkMemberInfo SkDisplayRandom::fInfo[] = { |
| SK_MEMBER(blend, Float), |
| SK_MEMBER(max, Float), |
| SK_MEMBER(min, Float), |
| SK_MEMBER_DYNAMIC_PROPERTY(random, Float), |
| SK_MEMBER_PROPERTY(seed, Int) |
| }; |
| |
| #endif |
| |
| DEFINE_GET_MEMBER(SkDisplayRandom); |
| |
| SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) { |
| } |
| |
| #ifdef SK_DUMP_ENABLED |
| void SkDisplayRandom::dump(SkAnimateMaker* maker) { |
| dumpBase(maker); |
| #ifdef SK_CAN_USE_FLOAT |
| SkDebugf("min=\"%g\" ", SkScalarToFloat(min)); |
| SkDebugf("max=\"%g\" ", SkScalarToFloat(max)); |
| SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend)); |
| #else |
| SkDebugf("min=\"%x\" ", min); |
| SkDebugf("max=\"%x\" ", max); |
| SkDebugf("blend=\"%x\" ", blend); |
| #endif |
| SkDebugf("/>\n"); |
| } |
| #endif |
| |
| bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const { |
| switch(index) { |
| case SK_PROPERTY(random): { |
| SkScalar random = fRandom.nextUScalar1(); |
| SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend); |
| value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT); |
| value->fType = SkType_Float; |
| return true; |
| } |
| default: |
| SkASSERT(0); |
| } |
| return false; |
| } |
| |
| bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) { |
| SkASSERT(index == SK_PROPERTY(seed)); |
| SkASSERT(value.fType == SkType_Int); |
| fRandom.setSeed(value.fOperand.fS32); |
| return true; |
| } |
| |