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93 lines
4.5 KiB
C++
93 lines
4.5 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2020 *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
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* software and associated documentation files (the "Software"), to deal in the Software *
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* without restriction, including without limitation the rights to use, copy, modify, *
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* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
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* permit persons to whom the Software is furnished to do so, subject to the following *
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* conditions: *
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* *
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* The above copyright notice and this permission notice shall be included in all copies *
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* or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
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* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
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* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
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* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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****************************************************************************************/
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#include <ghoul/io/texture/texturereader.h>
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#include <ghoul/opengl/texture.h>
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namespace openspace::volume {
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template <typename VoxelType>
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TextureSliceVolumeReader<VoxelType>::TextureSliceVolumeReader(
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std::vector<std::string> paths,
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size_t sliceCacheNIndices,
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size_t sliceCacheCapacity)
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: _paths(std::move(paths))
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, _cache(sliceCacheCapacity, sliceCacheNIndices)
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{}
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template <typename VoxelType>
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TextureSliceVolumeReader<VoxelType>::~TextureSliceVolumeReader() {}
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template <typename VoxelType>
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void TextureSliceVolumeReader<VoxelType>::initialize() {
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ghoul_assert(_paths.size() > 0, "No paths to read slices from.");
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std::shared_ptr<ghoul::opengl::Texture> firstSlice =
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ghoul::io::TextureReader::ref().loadTexture(_paths[0]);
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glm::uvec3 dimensions = firstSlice->dimensions();
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_sliceDimensions = glm::uvec2(dimensions.x, dimensions.y);
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_isInitialized = true;
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_cache.set(0, firstSlice);
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}
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template <typename VoxelType>
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VoxelType TextureSliceVolumeReader<VoxelType>::get(const glm::ivec3& coordinates) const {
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ghoul::opengl::Texture& slice = getSlice(coordinates.z);
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return slice.texel<VoxelType>(glm::uvec2(coordinates.x, coordinates.y));
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}
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template <typename VoxelType>
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glm::ivec3 TextureSliceVolumeReader<VoxelType>::dimensions() const {
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return glm::ivec3(_sliceDimensions, _paths.size());
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}
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template <typename VoxelType>
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void TextureSliceVolumeReader<VoxelType>::setPaths(std::vector<std::string> paths) {
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_paths = std::move(paths);
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}
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template <typename VoxelType>
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ghoul::opengl::Texture&
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TextureSliceVolumeReader<VoxelType>::getSlice(int sliceIndex) const
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{
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ghoul_assert(_isInitialized, "Volume is not initialized");
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ghoul_assert(
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sliceIndex >= 0 && sliceIndex < static_cast<int>(_paths.size()),
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"Slice index " + std::to_string(sliceIndex) + "is outside the range."
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);
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if (!_cache.has(sliceIndex)) {
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std::shared_ptr<ghoul::opengl::Texture> texture =
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ghoul::io::TextureReader::ref().loadTexture(_paths[sliceIndex]);
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glm::ivec2 dimensions = glm::uvec2(texture->dimensions());
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ghoul_assert(dimensions == _sliceDimensions, "Slice dimensions do not agree.");
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_cache.set(sliceIndex, std::move(texture));
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}
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return *_cache.get(sliceIndex).get();
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}
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} // namespace openspace::volume
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