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