graphicsmanager.h

#include "GraphicsManager.h"

#ifdef CYGWIN
#   include <ncurses/curses.h>
#else
#   include <curses.h>
#endif

GraphicsManager::GraphicsManager(){
}

//Get instance.
GraphicsManager& GraphicsManager::getInstance(){
    static GraphicsManager graphicsManager;
    return graphicsManager;
}

//Get terminal ready. Return 0: OK, NEGATIVE NUMBER: Otherwise.
int GraphicsManager::startUp(){
    /*if (initscr() == ERR)
        return -1;*/
    GraphicsManager::buffer1 = initscr();

    //Making buffer window for drawing
    GraphicsManager::buffer2 = newwin(0, 0, 0, 0);
    GraphicsManager::pBuffer = GraphicsManager::buffer1;

    //Clearing buffer
    if (werase(GraphicsManager::buffer1) != OK)
        return -2;
    if (werase(GraphicsManager::buffer2) != OK)
        return -3;

    //Leave cursor where it is after refresh.
    if (leaveok(GraphicsManager::buffer1, TRUE) != OK);
        return -4;
    if (leaveok(GraphicsManager::buffer2, TRUE) != OK);
        return -5;

    //If terminal supports color
    if (has_colors() == TRUE){
        //Enable color mode.
        start_color();

        //Setup color pairs prior to use.
        //init_pair(num, fg, bg)
        init_pair(COLOR_RED, COLOR_RED, COLOR_BLACK);
        init_pair(COLOR_GREEN, COLOR_GREEN, COLOR_BLACK);
        init_pair(COLOR_YELLOW, COLOR_YELLOW, COLOR_BLACK);
        init_pair(COLOR_BLUE, COLOR_BLUE, COLOR_BLACK);
        init_pair(COLOR_MAGENTA, COLOR_MAGENTA, COLOR_BLACK);
        init_pair(COLOR_CYAN, COLOR_CYAN, COLOR_BLACK);
        init_pair(COLOR_WHITE, COLOR_WHITE, COLOR_BLACK);
    }

    //Make characters bold
    if (wattron(GraphicsManager::buffer1, A_BOLD) != OK);
        return -6;
    if (wattron(GraphicsManager::buffer2, A_BOLD) != OK);
        return -7;

    // Getting max width and height
    int maxX = 0;
    int maxY = 0;
    getmaxyx(stdscr, maxY, maxX);   //MACRO

    //Make next refresh redraw window completely.
    if (clearok(GraphicsManager::buffer1, TRUE) != OK)
        return -8;
    if (clearok(GraphicsManager::buffer2, TRUE) != OK)
        return -9;

    Manager::startUp();
    return 0;
}

//Revert back to normal terminal.
void GraphicsManager::shutDown(){
    endwin();
    Manager::shutDown();
}

//Draw character at screen location (x, y) with color. Return 0: OK, -1: Otherwise.
int GraphicsManager::drawCharacter(Position worldPosition, char character, int color) const{
    WINDOW* window = GraphicsManager::getCurrentBuffer();

    if (wattron(window, COLOR_PAIR(color)) != OK)
        return -1;
    if (mvwaddch(window, worldPosition.getY(), worldPosition.getX(), character) != OK)
        return -1;
    //Drawing string;
    //mvwaddstr(window, y, x, std::string.c_str()
    if (wattroff(window, COLOR_PAIR(color)) != OK)
        return -1;
    return 0;
}

//Return display's horizontal max.
int GraphicsManager::getHorizontal() const{

}

//Return display's vertical max.
int GraphicsManager::getVertical() const{

}

//Render current display buffer. Return 0: OK, -1: Otherwise.
int GraphicsManager::swapBuffers(){
    wrefresh(GraphicsManager::pBuffer);
    if (pBuffer == GraphicsManager::buffer1)
        pBuffer = GraphicsManager::buffer2;
    else
        pBuffer = GraphicsManager::buffer1;
    swapBuffers();

}

//Return curses window that has been most recently drawn/refreshed.
WINDOW* GraphicsManager::getPreviousBuffer() const{
    if (pBuffer == GraphicsManager::buffer1)
        return GraphicsManager::buffer2;
    return GraphicsManager::buffer1;
}

//Return curses window that is being drawn, but not yet refreshed.
WINDOW* GraphicsManager::getCurrentBuffer() const{
    if (pBuffer == GraphicsManager::buffer1)
        return GraphicsManager::buffer1;
    return GraphicsManager::buffer2;
}