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      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 #ifndef SkOperandInterpolator_DEFINED
     11 #define SkOperandInterpolator_DEFINED
     12 
     13 #include "SkDisplayType.h"
     14 #include "SkInterpolator.h"
     15 #include "SkOperand.h"
     16 
     17 class SkOperandInterpolator : public SkInterpolatorBase {
     18 public:
     19     SkOperandInterpolator();
     20     SkOperandInterpolator(int elemCount, int frameCount, SkDisplayTypes type);
     21     SkOperand* getValues() { return fValues; }
     22     int getValuesCount() { return fFrameCount * fElemCount; }
     23     void    reset(int elemCount, int frameCount, SkDisplayTypes type);
     24 
     25     /** Add or replace a key frame, copying the values[] data into the interpolator.
     26         @param index    The index of this frame (frames must be ordered by time)
     27         @param time The millisecond time for this frame
     28         @param values   The array of values [elemCount] for this frame. The data is copied
     29                         into the interpolator.
     30         @param blend    A positive scalar specifying how to blend between this and the next key frame.
     31                         [0...1) is a cubic lag/log/lag blend (slow to change at the beginning and end)
     32                         1 is a linear blend (default)
     33                         (1...inf) is a cubic log/lag/log blend (fast to change at the beginning and end)
     34     */
     35     bool    setKeyFrame(int index, SkMSec time, const SkOperand values[], SkScalar blend = SK_Scalar1);
     36     Result timeToValues(SkMSec time, SkOperand values[]) const;
     37     SkDEBUGCODE(static void UnitTest();)
     38 private:
     39     SkDisplayTypes fType;
     40     SkOperand* fValues;     // pointer into fStorage
     41 #ifdef SK_DEBUG
     42     SkOperand(* fValuesArray)[10];
     43 #endif
     44     typedef SkInterpolatorBase INHERITED;
     45 };
     46 
     47 #endif // SkOperandInterpolator_DEFINED
     48 
     49