lab_glut_support.h

//-------------------------------------------------------------------------------------------------
// Descriere: header in care sunt definite structuri folosite de lab_glut sau utilizate pentru a
// comunica cu lab_glut
// Nota:
//		WindowInfo      - stocheaza informatii despre fereastra (inaltime, lungime, etc)
//		FramebufferInfo - stocheaza inforatii despre framebuffer
//		ContextInfo     - stocheaza informatii despre contextul opengl CERUT.
//		WindowListener  - clasa din care trebuie sa derivam pentru a lucra cu glut
//
// Nota2:
//		tot ce apartine de glut se afla intr-un namespace propriu
//
// Autor: Lucian Petrescu
// Data: 28 Sep 2013
//-------------------------------------------------------------------------------------------------

#pragma once
#include "dependencies\freeglut\freeglut.h"
#include <string>

namespace lab{
    namespace glut{
        //-------------------------------------------------------------------------------------------------
        // Informatii despre fereastra
        struct WindowInfo{
            WindowInfo();
            WindowInfo(std::string name, int width, int height, int start_position_x, int start_position_y, bool is_reshapable);
            void operator =(const WindowInfo& info);
            std::string name;													//numele ferestrei
            int width, height;													//inaltime, lungime
            int start_position_x, start_position_y;								//coordonate de start pt fereastra
            bool is_reshapable;													//e fereastra redimensionabila?
        };

        //-------------------------------------------------------------------------------------------------
        // informatii despre framebuffer
        struct FramebufferInfo{
            FramebufferInfo();
            FramebufferInfo(bool color, bool depth, bool stencil, bool msaa);
            void operator=(const FramebufferInfo& info);
            unsigned int flags;													// GL_RGBA | GL_DEPTH | GL_RGB | GL_STENCIL | ..
            bool msaa;															// MSAA 4x da/nu?
        };

        //-------------------------------------------------------------------------------------------------
        //informatii despre contextul OpenGL
        struct ContextInfo{
            ContextInfo();
            ContextInfo(int major_version, int minor_version, bool core);
            void operator=(const ContextInfo &info);
            int major_version, minor_version;
            bool core;
        };

        //---------------------------------------------------------------------------------------------------
        //clasa din care trebuie derivat pentru a putea lucra cu glut
        //functioneza ca un listener pe lab::glut
        class WindowListener{
        public:
            WindowListener();
            virtual ~WindowListener();

            //------------------- functii ce tin cadrul curent
            //functie chemata inainte de inceperea cadrului curent (adica inainte de a incepe procesul de afisare)
            virtual void notifyBeginFrame();
            //functie de afisare, chemata inainte afisarea efectiva (swapBuffers)
            virtual void notifyDisplayFrame();
            //functie chemata dupa sfarsirea procesului de afisare pe CPU
            virtual void notifyEndFrame();

            //------------------- reshape - se apealeaza atunci cand ecranul este
            virtual void notifyReshape(int width, int height, int previos_width, int previous_height);

            //------------------- functii de input
            //functie chemata cand e apasata o tasta
            virtual void notifyKeyPressed(unsigned char key_pressed, int mouse_x, int mouse_y);
            //functie chemata cand se termina apasarea unei taste
            virtual void notifyKeyReleased(unsigned char key_released, int mouse_x, int mouse_y);
            //functie chemata cand o tasta speciala e apasata (up down, left right, F1-12, etc)
            virtual void notifySpecialKeyPressed(int key_pressed, int mouse_x, int mouse_y);
            //functie chemata cand ose termina apsarea unei taste speciale (up down, left right, F1-12, etc)
            virtual void notifySpecialKeyReleased(int key_released, int mouse_x, int mouse_y);
            //functie chemata cand se face mouse drag
            virtual void notifyMouseDrag(int mouse_x, int mouse_y);
            //functie chemata cand mouse-ul se misca
            virtual void notifyMouseMove(int mouse_x, int mouse_y);
            //functie chemata cand un button de mouse e apasat
            virtual void notifyMouseClick(int button, int state, int mouse_x, int mouse_y);
            //functie chemata cand se face scroll cu mouse-ul.
            virtual void notifyMouseScroll(int wheel, int direction, int mouse_x, int mouse_y);
        };
    }
}