Matrix.h revision f6a11b8a9e25ff9861bbba19251bea84d8a5daf2 
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_MATRIX_H
18#define ANDROID_MATRIX_H
19
20#include <SkMatrix.h>
21
22namespace android {
23
24///////////////////////////////////////////////////////////////////////////////
25// Classes
26///////////////////////////////////////////////////////////////////////////////
27
28class Matrix4 {
29public:
30	Matrix4() {
31		loadIdentity();
32	}
33
34	Matrix4(const float* v) {
35		load(v);
36	}
37
38	Matrix4(const Matrix4& v) {
39		load(v);
40	}
41
42	Matrix4(const SkMatrix& v) {
43		load(v);
44	}
45
46	void loadIdentity();
47
48	void load(const float* v);
49	void load(const Matrix4& v);
50	void load(const SkMatrix& v);
51
52	void loadTranslate(float x, float y, float z);
53	void loadScale(float sx, float sy, float sz);
54	void loadRotate(float angle, float x, float y, float z);
55	void loadMultiply(const Matrix4& u, const Matrix4& v);
56
57	void loadOrtho(float left, float right, float bottom, float top, float near, float far);
58
59	void multiply(const Matrix4& v) {
60		Matrix4 u;
61		u.loadMultiply(*this, v);
62		load(u);
63	}
64
65	void translate(float x, float y, float z) {
66		Matrix4 u;
67		u.loadTranslate(x, y, z);
68		multiply(u);
69	}
70
71	void scale(float sx, float sy, float sz) {
72		Matrix4 u;
73		u.loadScale(sx, sy, sz);
74		multiply(u);
75	}
76
77	void rotate(float angle, float x, float y, float z) {
78		Matrix4 u;
79		u.loadRotate(angle, x, y, z);
80		multiply(u);
81	}
82
83	void copyTo(float* v) const;
84	void copyTo(SkMatrix& v) const;
85
86	void dump() const;
87
88private:
89    inline float get(int i, int j) const {
90        return mMat[i * 4 + j];
91    }
92
93    inline void set(int i, int j, float v) {
94    	mMat[i * 4 + j] = v;
95    }
96
97	float mMat[16];
98}; // class Matrix4
99
100///////////////////////////////////////////////////////////////////////////////
101// Types
102///////////////////////////////////////////////////////////////////////////////
103
104typedef Matrix4 mat4;
105
106}; // namespace android
107
108#endif // ANDROID_MATRIX_H
109