| // Copyright (c) 2022, ETH Zurich and UNC Chapel Hill. | |
| // All rights reserved. | |
| // | |
| // Redistribution and use in source and binary forms, with or without | |
| // modification, are permitted provided that the following conditions are met: | |
| // | |
| // * Redistributions of source code must retain the above copyright | |
| // notice, this list of conditions and the following disclaimer. | |
| // | |
| // * Redistributions in binary form must reproduce the above copyright | |
| // notice, this list of conditions and the following disclaimer in the | |
| // documentation and/or other materials provided with the distribution. | |
| // | |
| // * Neither the name of ETH Zurich and UNC Chapel Hill nor the names of | |
| // its contributors may be used to endorse or promote products derived | |
| // from this software without specific prior written permission. | |
| // | |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE | |
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| // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| // POSSIBILITY OF SUCH DAMAGE. | |
| // | |
| // Author: Johannes L. Schoenberger (jsch-at-demuc-dot-de) | |
| namespace colmap { | |
| namespace mvs { | |
| // Rotate the input matrix by 90 degrees in counter-clockwise direction. | |
| template <typename T> | |
| void CudaRotate(const T* input, T* output, const int width, const int height, | |
| const int pitch_input, const int pitch_output); | |
| //////////////////////////////////////////////////////////////////////////////// | |
| // Implementation | |
| //////////////////////////////////////////////////////////////////////////////// | |
| namespace internal { | |
| template <typename T> | |
| __global__ void CudaRotateKernel(T* output_data, const T* input_data, | |
| const int width, const int height, | |
| const int input_pitch, | |
| const int output_pitch) { | |
| int input_x = blockDim.x * blockIdx.x + threadIdx.x; | |
| int input_y = blockDim.y * blockIdx.y + threadIdx.y; | |
| if (input_x >= width || input_y >= height) { | |
| return; | |
| } | |
| int output_x = input_y; | |
| int output_y = width - 1 - input_x; | |
| *((T*)((char*)output_data + output_y * output_pitch) + output_x) = | |
| *((T*)((char*)input_data + input_y * input_pitch) + input_x); | |
| } | |
| } // namespace internal | |
| template <typename T> | |
| void CudaRotate(const T* input, T* output, const int width, const int height, | |
| const int pitch_input, const int pitch_output) { | |
| dim3 block_dim(TILE_DIM_ROTATE, 1, 1); | |
| dim3 grid_dim; | |
| grid_dim.x = (width - 1) / TILE_DIM_ROTATE + 1; | |
| grid_dim.y = height; | |
| internal::CudaRotateKernel<<<grid_dim, block_dim>>>( | |
| output, input, width, height, pitch_input, pitch_output); | |
| } | |
| } // namespace mvs | |
| } // namespace colmap | |