reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* libs/graphics/animator/SkDisplayRandom.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkDisplayRandom.h" |
| 19 | #include "SkInterpolator.h" |
| 20 | |
| 21 | enum SkDisplayRandom_Properties { |
| 22 | SK_PROPERTY(random), |
| 23 | SK_PROPERTY(seed) |
| 24 | }; |
| 25 | |
| 26 | #if SK_USE_CONDENSED_INFO == 0 |
| 27 | |
| 28 | const SkMemberInfo SkDisplayRandom::fInfo[] = { |
| 29 | SK_MEMBER(blend, Float), |
| 30 | SK_MEMBER(max, Float), |
| 31 | SK_MEMBER(min, Float), |
| 32 | SK_MEMBER_DYNAMIC_PROPERTY(random, Float), |
| 33 | SK_MEMBER_PROPERTY(seed, Int) |
| 34 | }; |
| 35 | |
| 36 | #endif |
| 37 | |
| 38 | DEFINE_GET_MEMBER(SkDisplayRandom); |
| 39 | |
| 40 | SkDisplayRandom::SkDisplayRandom() : blend(0), min(0), max(SK_Scalar1) { |
| 41 | } |
| 42 | |
| 43 | #ifdef SK_DUMP_ENABLED |
| 44 | void SkDisplayRandom::dump(SkAnimateMaker* maker) { |
| 45 | dumpBase(maker); |
| 46 | #ifdef SK_CAN_USE_FLOAT |
| 47 | SkDebugf("min=\"%g\" ", SkScalarToFloat(min)); |
| 48 | SkDebugf("max=\"%g\" ", SkScalarToFloat(max)); |
| 49 | SkDebugf("blend=\"%g\" ", SkScalarToFloat(blend)); |
| 50 | #else |
| 51 | SkDebugf("min=\"%x\" ", min); |
| 52 | SkDebugf("max=\"%x\" ", max); |
| 53 | SkDebugf("blend=\"%x\" ", blend); |
| 54 | #endif |
| 55 | SkDebugf("/>\n"); |
| 56 | } |
| 57 | #endif |
| 58 | |
| 59 | bool SkDisplayRandom::getProperty(int index, SkScriptValue* value) const { |
| 60 | switch(index) { |
| 61 | case SK_PROPERTY(random): { |
| 62 | SkScalar random = fRandom.nextUScalar1(); |
| 63 | SkScalar relativeT = SkUnitCubicInterp(random, SK_Scalar1 - blend, 0, 0, SK_Scalar1 - blend); |
| 64 | value->fOperand.fScalar = min + SkScalarMul(max - min, relativeT); |
| 65 | value->fType = SkType_Float; |
| 66 | return true; |
| 67 | } |
| 68 | default: |
| 69 | SkASSERT(0); |
| 70 | } |
| 71 | return false; |
| 72 | } |
| 73 | |
| 74 | bool SkDisplayRandom::setProperty(int index, SkScriptValue& value) { |
| 75 | SkASSERT(index == SK_PROPERTY(seed)); |
| 76 | SkASSERT(value.fType == SkType_Int); |
| 77 | fRandom.setSeed(value.fOperand.fS32); |
| 78 | return true; |
| 79 | } |
| 80 | |