TinyShooter/Graphics/Renderer.h

//
// Created by jovian on 18/07/17.
//

#ifndef TINYSHOOTER_RENDERER_H
#define TINYSHOOTER_RENDERER_H

#include <SDL2/SDL.h>
#include <vector>
#include "Visual.h"

class Renderer {
public :
    Renderer();

    virtual ~Renderer();

    bool initialize(int nbPlayers = 1); // Initialize SDL and load features (return false if error)

    void clearWindow(); // Clear all content
    void renderScene(std::vector<Visual *> &scope, const b2Vec2 &center, float zoom, int which = 0); // Displays a view
    void presentWindow(); // Refresh window

    SDL_Window *getWindow() const;

    /**
     * Compute a useful distance for AABB sculling query
     * @param zoom : Current zoom level
     * @param which : Which viewport
     * @return b2Vec2 double positive semi diagonale
     */
    b2Vec2 computeDiago(float zoom, int which = 0);

private:
    bool loadPicture(std::string name); // Load a single picture
    bool loadEveryPicture(); // Load all contents needed in the game
    void locateViews(int nbPlayers); // Locate viewports for splitscreen

protected:
    int m_screenWidth;
    int m_screenHeight;

    SDL_Window *m_window; // SDL main window
    SDL_Renderer *m_renderer; // SDL main renderer
    std::vector<SDL_Texture *> m_pictureTab; // Every game texture

    const int m_border; // Split screen offset
    SDL_Rect m_viewPort[4]; // Screen partition
};


#endif //TINYSHOOTER_RENDERER_H