Elysian Shadows

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//SDL includes for SDL, images, text, and sound
#include "SDL/SDL.h"
#include "SDL/SDL_image.h"
#include "SDL/SDL_ttf.h"
#include "SDL/SDL_mixer.h"

//including strings, file streaming for error logging, and string streaming to display the fps
#include <string>
#include <fstream>
#include <sstream>

//Used to write errors to a text file
std::ofstream logger("Error.txt");

//event structure
SDL_Event event;

//Dimensions of the screen
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;

//Surfaces to be used
SDL_Surface* screen;
SDL_Surface* background;
SDL_Surface* sprite;


void log(std::string message)
{
    //write to the text file
    logger << message << std::endl;
    //flush logger to ensure it works next time
    logger.flush();
}

void getError()
{
    log(SDL_GetError());
    log(IMG_GetError());
    log(TTF_GetError());
    log(Mix_GetError());
}

SDL_Surface* load_image(std::string filename)
{
    //Two surfaces, one to load the image, and another to be the used image
    SDL_Surface* loadedImage;
    SDL_Surface* optimizedImage;
    //Load the image
    loadedImage = IMG_Load(filename.c_str());

    //check if the image actually loaded
    if(loadedImage != NULL)
    {
        //format the image
        optimizedImage = SDL_DisplayFormat(loadedImage);

        //delete the old image
        SDL_FreeSurface(loadedImage);
    }

    //Check if it was formatted correctly
    if(optimizedImage != NULL)
    {
        //Map a colorkey... Magenta ftw?
        Uint32 colorKey = SDL_MapRGB(optimizedImage->format, 0xFF, 0, 0xFF);
        //Make magenta transparent
        SDL_SetColorKey(optimizedImage, SDL_SRCCOLORKEY, colorKey);
    }

    //return the formatted image for use
    return optimizedImage;
}

void apply_surface(int x, int y, SDL_Surface* source, SDL_Surface* destination)
{
    //make a rectangle to temporarily hold offsets
    SDL_Rect offsets;

    //put the offsets into the rectangle
    offsets.x = x;
    offsets.y = y;

    //blit the surface
    SDL_BlitSurface(source, NULL, destination, &offsets);
}

bool init()
{
    //initialize all of SDL
    if(SDL_Init(SDL_INIT_EVERYTHING) == -1)
    {
        return false;
    }

    //create the screen
    screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE);
    //check for errors during creation of screen
    if(screen == NULL)
    {
        return false;
    }

    //Set the caption for the window
    SDL_WM_SetCaption("Practice", NULL);

    //if everything went fine, return true
    return true;
}

bool load_files()
{
    //load the background
    background = load_image("back.png");
    //load the sprite
    sprite = load_image("guy.png");

    //if something went wrong in loading... return false
    if((background == NULL) || (sprite == NULL))
    {
        return false;
    }

    //otherwise return true
    return true;
}

void clean_up()
{
    //Delete surfaces
    SDL_FreeSurface(sprite);
    SDL_FreeSurface(background);

    //shutdown SDL
    SDL_Quit();
}

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int main(int argc, char* args[])
{
    //create a boolean to control the loop
    bool done = false;

    //initialize everything, then log error if anything went wrong.
    if(init == false)
    {
        getError();
        return 1;
    }

    //find if there were any errors while loading the files
    if(load_files() == false)
    {
        getError();
        return 1;
    }

    //apply images
    apply_surface(0, 0, background, screen);
    apply_surface(0, 0, sprite, screen);

    if(SDL_Flip(screen) == -1)
    {
        getError();
        return 1;
    }

    //while the user hasn't quit...
    while(done == false)
    {
        //and while there is events to handle...
        while(SDL_PollEvent(&event))
        {
            //if the user quit
            if(event.type == SDL_QUIT)
            {
                //set done to true to break the loop
                done = true;
            }
        }
    }

    //free surfaces and quit SDL
    clean_up();
    //return 0 to end the program
    return 0;
}

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 if(init == false)
    {
        getError();
        return 1;
    }