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83 lines
2.1 KiB
83 lines
2.1 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "rsMatrix2x2.h"
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#include "rsMatrix3x3.h"
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#include "rsMatrix4x4.h"
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#include "stdlib.h"
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#include "string.h"
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#include "math.h"
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namespace android {
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namespace renderscript {
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void Matrix3x3::loadIdentity() {
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m[0] = 1.f;
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m[1] = 0.f;
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m[2] = 0.f;
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m[3] = 0.f;
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m[4] = 1.f;
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m[5] = 0.f;
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m[6] = 0.f;
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m[7] = 0.f;
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m[8] = 1.f;
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}
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void Matrix3x3::load(const float *v) {
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memcpy(m, v, sizeof(m));
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}
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void Matrix3x3::load(const rs_matrix3x3 *v) {
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memcpy(m, v->m, sizeof(m));
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}
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void Matrix3x3::loadMultiply(const rs_matrix3x3 *lhs, const rs_matrix3x3 *rhs) {
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// Use a temporary variable to support the case where one of the inputs
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// is also the destination, e.g. left.loadMultiply(left, right);
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Matrix3x3 temp;
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for (int i=0 ; i<3 ; i++) {
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float ri0 = 0;
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float ri1 = 0;
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float ri2 = 0;
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for (int j=0 ; j<3 ; j++) {
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const float rhs_ij = ((const Matrix3x3 *)rhs)->get(i, j);
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ri0 += ((const Matrix3x3 *)lhs)->get(j, 0) * rhs_ij;
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ri1 += ((const Matrix3x3 *)lhs)->get(j, 1) * rhs_ij;
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ri2 += ((const Matrix3x3 *)lhs)->get(j, 2) * rhs_ij;
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}
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temp.set(i, 0, ri0);
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temp.set(i, 1, ri1);
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temp.set(i, 2, ri2);
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}
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load(&temp);
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}
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void Matrix3x3::transpose() {
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int i, j;
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float temp;
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for (i = 0; i < 2; ++i) {
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for (j = i + 1; j < 3; ++j) {
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temp = get(i, j);
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set(i, j, get(j, i));
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set(j, i, temp);
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}
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}
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}
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} // namespace renderscript
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} // namespace android
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