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/* libs/graphics/animator/SkOperandIterpolator.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 "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 + SkScalarRound((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
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