Home | History | Annotate | Download | only in rs
      1 /*
      2  * Copyright (C) 2011 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 #include "rsMatrix2x2.h"
     18 #include "rsMatrix3x3.h"
     19 #include "rsMatrix4x4.h"
     20 
     21 #include "stdlib.h"
     22 #include "string.h"
     23 #include "math.h"
     24 
     25 using namespace android;
     26 using namespace android::renderscript;
     27 
     28 void Matrix3x3::loadIdentity() {
     29     m[0] = 1.f;
     30     m[1] = 0.f;
     31     m[2] = 0.f;
     32     m[3] = 0.f;
     33     m[4] = 1.f;
     34     m[5] = 0.f;
     35     m[6] = 0.f;
     36     m[7] = 0.f;
     37     m[8] = 1.f;
     38 }
     39 
     40 void Matrix3x3::load(const float *v) {
     41     memcpy(m, v, sizeof(m));
     42 }
     43 
     44 void Matrix3x3::load(const rs_matrix3x3 *v) {
     45     memcpy(m, v->m, sizeof(m));
     46 }
     47 
     48 void Matrix3x3::loadMultiply(const rs_matrix3x3 *lhs, const rs_matrix3x3 *rhs) {
     49     for (int i=0 ; i<3 ; i++) {
     50         float ri0 = 0;
     51         float ri1 = 0;
     52         float ri2 = 0;
     53         for (int j=0 ; j<3 ; j++) {
     54             const float rhs_ij = ((const Matrix3x3 *)rhs)->get(i, j);
     55             ri0 += ((const Matrix3x3 *)lhs)->get(j, 0) * rhs_ij;
     56             ri1 += ((const Matrix3x3 *)lhs)->get(j, 1) * rhs_ij;
     57             ri2 += ((const Matrix3x3 *)lhs)->get(j, 2) * rhs_ij;
     58         }
     59         set(i, 0, ri0);
     60         set(i, 1, ri1);
     61         set(i, 2, ri2);
     62     }
     63 }
     64 
     65 void Matrix3x3::transpose() {
     66     int i, j;
     67     float temp;
     68     for (i = 0; i < 2; ++i) {
     69         for (j = i + 1; j < 3; ++j) {
     70             temp = get(i, j);
     71             set(i, j, get(j, i));
     72             set(j, i, temp);
     73         }
     74     }
     75 }
     76 
     77