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106 lines
4.0 KiB
C++
106 lines
4.0 KiB
C++
/*****************************************************************************************
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* *
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* OpenSpace *
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* *
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* Copyright (c) 2014-2017 *
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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___GPUDATA___H__
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#define __OPENSPACE_CORE___GPUDATA___H__
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#include <ghoul/opengl/programobject.h>
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#include <ghoul/opengl/texture.h>
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#include <ghoul/opengl/textureunit.h>
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#include <string>
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#include <memory>
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namespace openspace {
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/**
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* Very simple class maintaining a uniform location.
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*/
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class UniformLocation {
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public:
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/**
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* Updates the uniform location of the uniform variable named <name>
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* in the provided shader program.
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*/
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void bind(ghoul::opengl::ProgramObject* program, const std::string& name);
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protected:
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GLint _uniformLocation = -1;
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};
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/**
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* Manages a GPU representation of the templated data type T.
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* This class provides a simple interface setting the value of
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* the binded GLSL variable.
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*/
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template<typename T>
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class GPUData : public UniformLocation{
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public:
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/**
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* Sets the value of T to its corresponding GPU value.
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* OBS! Users must ensure bind has been called before using this method
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*/
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void setValue(ghoul::opengl::ProgramObject* program, T val){
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program->setUniform(_uniformLocation, val);
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}
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};
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/**
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* Manages a Texture on the GPU.
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* This class provides a simple interface binding texture to the
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* named uniform.
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*/
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class GPUTexture : public UniformLocation{
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public:
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/**
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* Sets and assignes a texture unit within the provided shader
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* program.
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* OBS! Users must ensure bind has been called before using this method.
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*/
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void setValue(ghoul::opengl::ProgramObject* program, std::shared_ptr<ghoul::opengl::Texture> texture){
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_texUnit = std::make_unique<ghoul::opengl::TextureUnit>();
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_texUnit->activate();
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texture->bind();
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program->setUniform(_uniformLocation, *_texUnit);
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}
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void deactivate(){
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_texUnit = nullptr;
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}
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private:
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std::unique_ptr<ghoul::opengl::TextureUnit> _texUnit;
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};
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} // namespace openspace
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#endif // __OPENSPACE_CORE___GPUDATA___H__
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