DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d8847129d134)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149

/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */


#include "SkOperandInterpolator.h"
#include "SkScript.h"

SkOperandInterpolator::SkOperandInterpolator() {
    INHERITED::reset(0, 0);
    fType = SkType_Unknown;
}

SkOperandInterpolator::SkOperandInterpolator(int elemCount, int frameCount,
                                             SkDisplayTypes type)
{
    this->reset(elemCount, frameCount, type);
}

void SkOperandInterpolator::reset(int elemCount, int frameCount, SkDisplayTypes type)
{
//  SkASSERT(type == SkType_String || type == SkType_Float || type == SkType_Int ||
//      type == SkType_Displayable || type == SkType_Drawable);
    INHERITED::reset(elemCount, frameCount);
    fType = type;
    fStorage = sk_malloc_throw((sizeof(SkOperand) * elemCount + sizeof(SkTimeCode)) * frameCount);
    fTimes = (SkTimeCode*) fStorage;
    fValues = (SkOperand*) ((char*) fStorage + sizeof(SkTimeCode) * frameCount);
#ifdef SK_DEBUG
    fTimesArray = (SkTimeCode(*)[10]) fTimes;
    fValuesArray = (SkOperand(*)[10]) fValues;
#endif
}

bool SkOperandInterpolator::setKeyFrame(int index, SkMSec time, const SkOperand values[], SkScalar blend)
{
    SkASSERT(values != NULL);
    blend = SkScalarPin(blend, 0, SK_Scalar1);

    bool success = ~index == SkTSearch<SkMSec>(&fTimes->fTime, index, time, sizeof(SkTimeCode));
    SkASSERT(success);
    if (success) {
        SkTimeCode* timeCode = &fTimes[index];
        timeCode->fTime = time;
        timeCode->fBlend[0] = SK_Scalar1 - blend;
        timeCode->fBlend[1] = 0;
        timeCode->fBlend[2] = 0;
        timeCode->fBlend[3] = SK_Scalar1 - blend;
        SkOperand* dst = &fValues[fElemCount * index];
        memcpy(dst, values, fElemCount * sizeof(SkOperand));
    }
    return success;
}

SkInterpolatorBase::Result SkOperandInterpolator::timeToValues(SkMSec time, SkOperand values[]) const
{
    SkScalar T;
    int index;
    SkBool exact;
    Result result = timeToT(time, &T, &index, &exact);
    if (values)
    {
        const SkOperand* nextSrc = &fValues[index * fElemCount];

        if (exact)
            memcpy(values, nextSrc, fElemCount * sizeof(SkScalar));
        else
        {
            SkASSERT(index > 0);

            const SkOperand* prevSrc = nextSrc - fElemCount;

            if (fType == SkType_Float || fType == SkType_3D_Point) {
                for (int i = fElemCount - 1; i >= 0; --i)
                    values[i].fScalar = SkScalarInterp(prevSrc[i].fScalar, nextSrc[i].fScalar, T);
            } else if (fType == SkType_Int || fType == SkType_MSec) {
                for (int i = fElemCount - 1; i >= 0; --i) {
                    int32_t a = prevSrc[i].fS32;
                    int32_t b = nextSrc[i].fS32;
                    values[i].fS32 = a + SkScalarRoundToInt((b - a) * T);
                }
            } else
                memcpy(values, prevSrc, sizeof(SkOperand) * fElemCount);
        }
    }
    return result;
}

///////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////

#ifdef SK_DEBUG

#ifdef SK_SUPPORT_UNITTEST
    static SkOperand* iset(SkOperand array[3], int a, int b, int c)
    {
        array[0].fScalar = SkIntToScalar(a);
        array[1].fScalar = SkIntToScalar(b);
        array[2].fScalar = SkIntToScalar(c);
        return array;
    }
#endif

void SkOperandInterpolator::UnitTest()
{
#ifdef SK_SUPPORT_UNITTEST
    SkOperandInterpolator   inter(3, 2, SkType_Float);
    SkOperand       v1[3], v2[3], v[3], vv[3];
    Result          result;

    inter.setKeyFrame(0, 100, iset(v1, 10, 20, 30), 0);
    inter.setKeyFrame(1, 200, iset(v2, 110, 220, 330));

    result = inter.timeToValues(0, v);
    SkASSERT(result == kFreezeStart_Result);
    SkASSERT(memcmp(v, v1, sizeof(v)) == 0);

    result = inter.timeToValues(99, v);
    SkASSERT(result == kFreezeStart_Result);
    SkASSERT(memcmp(v, v1, sizeof(v)) == 0);

    result = inter.timeToValues(100, v);
    SkASSERT(result == kNormal_Result);
    SkASSERT(memcmp(v, v1, sizeof(v)) == 0);

    result = inter.timeToValues(200, v);
    SkASSERT(result == kNormal_Result);
    SkASSERT(memcmp(v, v2, sizeof(v)) == 0);

    result = inter.timeToValues(201, v);
    SkASSERT(result == kFreezeEnd_Result);
    SkASSERT(memcmp(v, v2, sizeof(v)) == 0);

    result = inter.timeToValues(150, v);
    SkASSERT(result == kNormal_Result);
    SkASSERT(memcmp(v, iset(vv, 60, 120, 180), sizeof(v)) == 0);

    result = inter.timeToValues(125, v);
    SkASSERT(result == kNormal_Result);
    result = inter.timeToValues(175, v);
    SkASSERT(result == kNormal_Result);
#endif
}

#endif