1 /*
2 * Copyright (c) 2022 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 "color_space_convertor.h"
17
18 namespace OHOS {
19 namespace ColorManager {
ColorSpaceConvertor(const ColorSpace & src,const ColorSpace & dst,GamutMappingMode mappingMode)20 ColorSpaceConvertor::ColorSpaceConvertor(const ColorSpace &src,
21 const ColorSpace &dst, GamutMappingMode mappingMode)
22 : srcColorSpace(src), dstColorSpace(dst), mappingMode(mappingMode)
23 {
24 transferMatrix = dstColorSpace.GetXYZToRGB() * srcColorSpace.GetRGBToXYZ();
25 }
26
Convert(const Vector3 & v) const27 Vector3 ColorSpaceConvertor::Convert(const Vector3& v) const
28 {
29 Vector3 srcLinear = v;
30 for (auto& n : srcLinear) {
31 n = std::clamp(n, srcColorSpace.clampMin, srcColorSpace.clampMax);
32 }
33 srcLinear = srcColorSpace.ToLinear(srcLinear);
34
35 Vector3 dstNonLinear =
36 dstColorSpace.ToNonLinear(transferMatrix * srcLinear);
37 for (auto& n : dstNonLinear) {
38 n = std::clamp(n, dstColorSpace.clampMin, dstColorSpace.clampMax);
39 }
40 return dstNonLinear;
41 }
42
ConvertLinear(const Vector3 & v) const43 Vector3 ColorSpaceConvertor::ConvertLinear(const Vector3& v) const
44 {
45 Vector3 srcLinear = v;
46 for (auto& n : srcLinear) {
47 n = std::clamp(n, srcColorSpace.clampMin, srcColorSpace.clampMax);
48 }
49
50 Vector3 dstLinear = transferMatrix * srcLinear;
51 for (auto& n : dstLinear) {
52 n = std::clamp(n, dstColorSpace.clampMin, dstColorSpace.clampMax);
53 }
54 return dstLinear;
55 }
56 } // namespace ColorManager
57 } // namespace OHOS