Program.h

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// Copyright © 2008-2023 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#pragma once
 
#include "OpenGLLibs.h"
 
#include <string>
#include <vector>
 
namespace Graphics {
 
    namespace OGL {
 
        struct ShaderCompileException {};
        struct ProgramException {};
 
        struct ProgramDef;
        class Shader;
 
        /*
        * A Program is a specific, immutable variant of a shader that maps closely to
        * the underlying API's terminology (Program, GraphicsPipeline, etc.)
        */
        class Program {
        public:
            Program(Shader *shader, const ProgramDef &def);
            ~Program();
 
            void Reload(Shader *shader, const ProgramDef &def);
            bool Loaded() const { return success; }
 
            GLuint GetConstantLocation(uint32_t index) const { return m_constants[index]; }
            GLuint GetProgramID() const { return m_program; }
 
        protected:
            GLuint LoadShaders(const ProgramDef &def);
            void InitUniforms(Shader *shader);
 
            GLuint m_program;
            bool success;
 
            // map of push constant bindings to glUniform locations
            std::vector<GLuint> m_constants;
        };
 
    } // namespace OGL
 
} // namespace Graphics