1 /*
2 * Copyright (c) 2021-2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "animation/rs_value_estimator.h"
17
18 #include "common/rs_common_def.h"
19 #include "platform/common/rs_log.h"
20 #include "modifier/rs_render_property.h"
21 #include "render/rs_material_filter.h"
22
23 namespace OHOS {
24 namespace Rosen {
Estimate(float fraction,const Quaternion & startValue,const Quaternion & endValue)25 Quaternion RSValueEstimator::Estimate(float fraction,
26 const Quaternion& startValue, const Quaternion& endValue)
27 {
28 auto value = startValue;
29 return value.Slerp(endValue, fraction);
30 }
31
32 template<>
EstimateFraction(const std::shared_ptr<RSInterpolator> & interpolator)33 float RSCurveValueEstimator<float>::EstimateFraction(const std::shared_ptr<RSInterpolator>& interpolator)
34 {
35 if (interpolator == nullptr) {
36 ROSEN_LOGD("Interpolator is null, return FRACTION_MIN.");
37 return FRACTION_MIN;
38 }
39 float start = FRACTION_MIN;
40 float end = FRACTION_MAX;
41 auto byValue = endValue_ - startValue_;
42 while (end > start + EPSILON) {
43 float mid = (start + end) / 2.0f;
44 float fraction = interpolator->Interpolate(mid);
45 auto interpolationValue = startValue_ * (1.0f - fraction) + endValue_ * fraction;
46 if (lastValue_ < interpolationValue) {
47 (byValue > 0) ? (end = mid) : (start = mid);
48 } else {
49 (byValue > 0) ? (start = mid) : (end = mid);
50 }
51
52 if (std::abs(lastValue_ - interpolationValue) <= EPSILON) {
53 return mid;
54 }
55 }
56
57 return FRACTION_MIN;
58 }
59
60 template class RSCurveValueEstimator<float>;
61 } // namespace Rosen
62 } // namespace OHOS
63