GLContextManager.hpp

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#pragma once
 
#include <GL/gl.h>
 
namespace BARE2D {
 
    class GLContext {
    public:
        GLContext();
        ~GLContext();
        /**
         * @brief Sets the active texture "slot". This can be GL_TEXTURE0 to GL_TEXTURE8 (I think. Check the literature)
         * @param texture The texture slot to tell OpenGL is "active"
         */
        void setActiveTexture(GLenum texture);
        
        /**
         * @brief Binds a texture to target in the currently active texture slot
         * @param target The target to bind to 
         * @param texture The id of a texture.
         */
        void bindTexture(GLenum target, GLenum texture);
        
        /**
         * @brief Unbinds a texture
         * @param target The target (GL_TEXTURE_2D generally)
         * @param textureslot The texture to be unbound (GL_TEXTURE0-8)
         */
        void unbindTexture(GLenum target, GLenum textureslot);
        
        GLuint getBoundTexture();
 
    private:
        // The active texture "slot"
        GLenum m_activeTexture = GL_TEXTURE0;
        
        // Holds a bound texture for each texture "slot" there is in OpenGL (1 for GL_TEXTURE0, 1 for GL_TEXTURE1, etc.)
        GLuint* m_boundTextureIDs = nullptr;
    };
 
 
    class GLContextManager
    {
    public:
        static GLContext* getContext();
        
    private:
        static GLContext* m_context;
 
    };
 
}