ShaderProgram.hpp

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// Copyright 2018-2020 Jan Niklas Hasse <jhasse@bixense.com>
// For conditions of distribution and use, see copyright notice in LICENSE.txt
#pragma once
 
#include "Finally.hpp"
 
#include <memory>
#include <string>
 
namespace jngl {
 
class Shader;
 
class ShaderProgram {
public:
    ShaderProgram(const Shader& vertex, const Shader& fragment);
    ~ShaderProgram();
    ShaderProgram(const ShaderProgram&) = delete;
    ShaderProgram(ShaderProgram&&) = delete;
    ShaderProgram& operator=(const ShaderProgram&) = delete;
    ShaderProgram& operator=(ShaderProgram&&) = delete;
 
    struct Impl;
    struct Context {
        explicit Context(const Impl&);
        ~Context();
        Context(const Context&) = delete;
        Context& operator=(const Context&) = delete;
        Context(Context&&) noexcept;
        Context& operator=(Context&&) = delete;
 
        static void setUniform(int location, int v0);
        static void setUniform(int location, float v0, float v1);
        static void setUniform(int location, float v0, float v1, float v2, float v3);
 
    private:
        static int referenceCount;
        static const Impl* activeImpl;
    };
 
#if __cplusplus >= 201703L
        [[nodiscard]]
#endif
        Context
        use() const;
 
    [[nodiscard]] int getAttribLocation(const std::string& name) const;
    [[nodiscard]] int getUniformLocation(const std::string& name) const;
 
private:
    std::unique_ptr<Impl> impl;
};
 
void setUniform(int location, float v0, float v1);
 
} // namespace jngl