Matrix.h revision 9d5316e3f56d138504565ff311145ac01621dff4 
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_UI_MATRIX_H
18#define ANDROID_UI_MATRIX_H
19
20#include <SkMatrix.h>
21
22#include "Rect.h"
23
24namespace android {
25namespace uirenderer {
26
27///////////////////////////////////////////////////////////////////////////////
28// Classes
29///////////////////////////////////////////////////////////////////////////////
30
31class Matrix4 {
32public:
33	Matrix4() {
34		loadIdentity();
35	}
36
37	Matrix4(const float* v) {
38		load(v);
39	}
40
41	Matrix4(const Matrix4& v) {
42		load(v);
43	}
44
45	Matrix4(const SkMatrix& v) {
46		load(v);
47	}
48
49	void loadIdentity();
50
51	void load(const float* v);
52	void load(const Matrix4& v);
53	void load(const SkMatrix& v);
54
55	void loadTranslate(float x, float y, float z);
56	void loadScale(float sx, float sy, float sz);
57	void loadRotate(float angle, float x, float y, float z);
58	void loadMultiply(const Matrix4& u, const Matrix4& v);
59
60	void loadOrtho(float left, float right, float bottom, float top, float near, float far);
61
62	void multiply(const Matrix4& v) {
63		Matrix4 u;
64		u.loadMultiply(*this, v);
65		load(u);
66	}
67
68	void translate(float x, float y, float z) {
69		Matrix4 u;
70		u.loadTranslate(x, y, z);
71		multiply(u);
72	}
73
74	void scale(float sx, float sy, float sz) {
75		Matrix4 u;
76		u.loadScale(sx, sy, sz);
77		multiply(u);
78	}
79
80	void rotate(float angle, float x, float y, float z) {
81		Matrix4 u;
82		u.loadRotate(angle, x, y, z);
83		multiply(u);
84	}
85
86	void copyTo(float* v) const;
87	void copyTo(SkMatrix& v) const;
88
89	void mapRect(Rect& r) const;
90
91	void dump() const;
92
93private:
94    inline float get(int i, int j) const {
95        return mMat[i * 4 + j];
96    }
97
98    inline void set(int i, int j, float v) {
99    	mMat[i * 4 + j] = v;
100    }
101
102	float mMat[16];
103}; // class Matrix4
104
105///////////////////////////////////////////////////////////////////////////////
106// Types
107///////////////////////////////////////////////////////////////////////////////
108
109typedef Matrix4 mat4;
110
111}; // namespace uirenderer
112}; // namespace android
113
114#endif // ANDROID_UI_MATRIX_H
115