1 /* libs/graphics/animator/SkOperandInterpolator.h 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 #ifndef SkOperandInterpolator_DEFINED 19 #define SkOperandInterpolator_DEFINED 20 21 #include "SkDisplayType.h" 22 #include "SkInterpolator.h" 23 #include "SkOperand.h" 24 25 class SkOperandInterpolator : public SkInterpolatorBase { 26 public: 27 SkOperandInterpolator(); 28 SkOperandInterpolator(int elemCount, int frameCount, SkDisplayTypes type); 29 SkOperand* getValues() { return fValues; } 30 int getValuesCount() { return fFrameCount * fElemCount; } 31 void reset(int elemCount, int frameCount, SkDisplayTypes type); 32 33 /** Add or replace a key frame, copying the values[] data into the interpolator. 34 @param index The index of this frame (frames must be ordered by time) 35 @param time The millisecond time for this frame 36 @param values The array of values [elemCount] for this frame. The data is copied 37 into the interpolator. 38 @param blend A positive scalar specifying how to blend between this and the next key frame. 39 [0...1) is a cubic lag/log/lag blend (slow to change at the beginning and end) 40 1 is a linear blend (default) 41 (1...inf) is a cubic log/lag/log blend (fast to change at the beginning and end) 42 */ 43 bool setKeyFrame(int index, SkMSec time, const SkOperand values[], SkScalar blend = SK_Scalar1); 44 Result timeToValues(SkMSec time, SkOperand values[]) const; 45 SkDEBUGCODE(static void UnitTest();) 46 private: 47 SkDisplayTypes fType; 48 SkOperand* fValues; // pointer into fStorage 49 #ifdef SK_DEBUG 50 SkOperand(* fValuesArray)[10]; 51 #endif 52 typedef SkInterpolatorBase INHERITED; 53 }; 54 55 #endif // SkOperandInterpolator_DEFINED 56 57
