1/*
2 * Copyright (C) 2010 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 ANDROID_HWUI_MATRIX_H
18#define ANDROID_HWUI_MATRIX_H
19
20#include <SkMatrix.h>
21
22#include <cutils/compiler.h>
23
24#include "Rect.h"
25
26namespace android {
27namespace uirenderer {
28
29///////////////////////////////////////////////////////////////////////////////
30// Classes
31///////////////////////////////////////////////////////////////////////////////
32
33class ANDROID_API Matrix4 {
34public:
35    float data[16];
36
37    enum Entry {
38        kScaleX = 0,
39        kSkewY = 1,
40        kPerspective0 = 3,
41        kSkewX = 4,
42        kScaleY = 5,
43        kPerspective1 = 7,
44        kScaleZ = 10,
45        kTranslateX = 12,
46        kTranslateY = 13,
47        kTranslateZ = 14,
48        kPerspective2 = 15
49    };
50
51    Matrix4() {
52        loadIdentity();
53    }
54
55    Matrix4(const float* v) {
56        load(v);
57    }
58
59    Matrix4(const Matrix4& v) {
60        load(v);
61    }
62
63    Matrix4(const SkMatrix& v) {
64        load(v);
65    }
66
67    void loadIdentity();
68
69    void load(const float* v);
70    void load(const Matrix4& v);
71    void load(const SkMatrix& v);
72
73    void loadInverse(const Matrix4& v);
74
75    void loadTranslate(float x, float y, float z);
76    void loadScale(float sx, float sy, float sz);
77    void loadSkew(float sx, float sy);
78    void loadRotate(float angle, float x, float y, float z);
79    void loadMultiply(const Matrix4& u, const Matrix4& v);
80
81    void loadOrtho(float left, float right, float bottom, float top, float near, float far);
82
83    void multiply(const Matrix4& v) {
84        Matrix4 u;
85        u.loadMultiply(*this, v);
86        load(u);
87    }
88
89    void multiply(float v);
90
91    void translate(float x, float y, float z) {
92        Matrix4 u;
93        u.loadTranslate(x, y, z);
94        multiply(u);
95    }
96
97    void scale(float sx, float sy, float sz) {
98        Matrix4 u;
99        u.loadScale(sx, sy, sz);
100        multiply(u);
101    }
102
103    void skew(float sx, float sy) {
104        Matrix4 u;
105        u.loadSkew(sx, sy);
106        multiply(u);
107    }
108
109    void rotate(float angle, float x, float y, float z) {
110        Matrix4 u;
111        u.loadRotate(angle, x, y, z);
112        multiply(u);
113    }
114
115    bool isPureTranslate() const;
116    bool isSimple() const;
117    bool isIdentity() const;
118    bool isPerspective() const;
119
120    bool changesBounds() const;
121
122    void copyTo(float* v) const;
123    void copyTo(SkMatrix& v) const;
124
125    void mapRect(Rect& r) const;
126    void mapPoint(float& x, float& y) const;
127
128    float getTranslateX();
129    float getTranslateY();
130
131    void dump() const;
132
133private:
134    bool mSimpleMatrix;
135    bool mIsIdentity;
136
137    inline float get(int i, int j) const {
138        return data[i * 4 + j];
139    }
140
141    inline void set(int i, int j, float v) {
142        data[i * 4 + j] = v;
143    }
144}; // class Matrix4
145
146///////////////////////////////////////////////////////////////////////////////
147// Types
148///////////////////////////////////////////////////////////////////////////////
149
150typedef Matrix4 mat4;
151
152}; // namespace uirenderer
153}; // namespace android
154
155#endif // ANDROID_HWUI_MATRIX_H
156