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 // Use a temporary variable to support the case where one of the inputs 50 // is also the destination, e.g. left.loadMultiply(left, right); 51 Matrix3x3 temp; 52 for (int i=0 ; i<3 ; i++) { 53 float ri0 = 0; 54 float ri1 = 0; 55 float ri2 = 0; 56 for (int j=0 ; j<3 ; j++) { 57 const float rhs_ij = ((const Matrix3x3 *)rhs)->get(i, j); 58 ri0 += ((const Matrix3x3 *)lhs)->get(j, 0) * rhs_ij; 59 ri1 += ((const Matrix3x3 *)lhs)->get(j, 1) * rhs_ij; 60 ri2 += ((const Matrix3x3 *)lhs)->get(j, 2) * rhs_ij; 61 } 62 temp.set(i, 0, ri0); 63 temp.set(i, 1, ri1); 64 temp.set(i, 2, ri2); 65 } 66 load(&temp); 67 } 68 69 void Matrix3x3::transpose() { 70 int i, j; 71 float temp; 72 for (i = 0; i < 2; ++i) { 73 for (j = i + 1; j < 3; ++j) { 74 temp = get(i, j); 75 set(i, j, get(j, i)); 76 set(j, i, temp); 77 } 78 } 79 } 80 81
