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68 lines
1.8 KiB
68 lines
1.8 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 Matrix2x2::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] = 1.f; |
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} |
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void Matrix2x2::load(const float *v) { |
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memcpy(m, v, sizeof(m)); |
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} |
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void Matrix2x2::load(const rs_matrix2x2 *v) { |
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memcpy(m, v->m, sizeof(m)); |
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} |
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void Matrix2x2::loadMultiply(const rs_matrix2x2 *lhs, const rs_matrix2x2 *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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Matrix2x2 temp; |
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for (int i=0 ; i<2 ; i++) { |
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float ri0 = 0; |
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float ri1 = 0; |
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for (int j=0 ; j<2 ; j++) { |
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const float rhs_ij = ((const Matrix2x2 *)rhs)->get(i, j); |
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ri0 += ((const Matrix2x2 *)lhs)->get(j, 0) * rhs_ij; |
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ri1 += ((const Matrix2x2 *)lhs)->get(j, 1) * 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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} |
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load(&temp); |
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} |
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void Matrix2x2::transpose() { |
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float temp = m[1]; |
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m[1] = m[2]; |
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m[2] = temp; |
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} |
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} // namespace renderscript |
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} // namespace android
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