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https://github.com/OpenSpace/OpenSpace.git
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81 lines
3.6 KiB
C++
81 lines
3.6 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2025 *
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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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#ifndef __OPENSPACE_CORE___TRANSFERFUNCTION___H__
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#define __OPENSPACE_CORE___TRANSFERFUNCTION___H__
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#include <ghoul/glm.h>
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#include <filesystem>
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#include <functional>
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#include <memory>
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#include <string>
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namespace ghoul::filesystem { class File; }
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namespace ghoul::opengl { class Texture; }
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namespace openspace {
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class TransferFunction {
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public:
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using TfChangedCallback = std::function<void (const TransferFunction&)>;
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explicit TransferFunction(const std::filesystem::path& filepath,
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TfChangedCallback tfChangedCallback = TfChangedCallback());
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~TransferFunction();
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TransferFunction(TransferFunction&& rhs) = default;
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void setPath(const std::filesystem::path& filepath);
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ghoul::opengl::Texture& texture();
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void bind();
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void update();
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glm::vec4 sample(size_t offset);
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size_t width();
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void setCallback(TfChangedCallback callback);
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void setTextureFromTxt();
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private:
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void setTextureFromImage();
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void uploadTexture();
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std::filesystem::path _filepath;
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std::unique_ptr<ghoul::filesystem::File> _file;
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std::shared_ptr<ghoul::opengl::Texture> _texture;
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bool _needsUpdate = false;
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TfChangedCallback _tfChangedCallback;
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};
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struct MappingKey {
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MappingKey(float p, const glm::vec4& c): position(p), color(c) {}
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MappingKey(float p): position(p), color(glm::vec4(0.f)) {}
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bool operator<(const MappingKey& rhs) { return position < rhs.position; }
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float position = 0.f;
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glm::vec4 color = glm::vec4(0.f);
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};
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} // namespace openspace
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#endif // __OPENSPACE_CORE___TRANSFERFUNCTION___H__
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