1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef SkColorMatrix_DEFINED
18#define SkColorMatrix_DEFINED
19
20#include "SkScalar.h"
21
22class SkColorMatrix {
23public:
24    SkScalar    fMat[20];
25
26    void setIdentity();
27    void setScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
28                  SkScalar aScale = SK_Scalar1);
29    void preScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
30                  SkScalar aScale = SK_Scalar1);
31    void postScale(SkScalar rScale, SkScalar gScale, SkScalar bScale,
32                   SkScalar aScale = SK_Scalar1);
33
34    enum Axis {
35        kR_Axis = 0,
36        kG_Axis = 1,
37        kB_Axis = 2
38    };
39    void setRotate(Axis, SkScalar degrees);
40    void setSinCos(Axis, SkScalar sine, SkScalar cosine);
41    void preRotate(Axis, SkScalar degrees);
42    void postRotate(Axis, SkScalar degrees);
43
44    void setConcat(const SkColorMatrix& a, const SkColorMatrix& b);
45    void preConcat(const SkColorMatrix& mat) { this->setConcat(*this, mat); }
46    void postConcat(const SkColorMatrix& mat) { this->setConcat(mat, *this); }
47
48    void setSaturation(SkScalar sat);
49    void setRGB2YUV();
50    void setYUV2RGB();
51};
52
53#endif
54