Elysian Shadows

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#define SCREEN_WIDTH 640
#define SCREEN_HEIGHT 480

void UpdateMouse();
void KeyboardInput();
void KeyLogic();
void Text();

SDL_Surface *g_pIcoSurface = IMG_Load("null_ico.PNG");
SDL_Surface *g_pMainSurface = NULL;
SDL_Surface *g_pTextSurface = NULL;
SDL_Event g_Event;
SDL_Rect g_Rect;

TTF_Font *g_Font = TTF_OpenFont("arial.ttf", 14);

Uint8 *key_array; 

Uint8 g_red, g_blue, g_green;
Uint32 g_color;

class Mouse {
public:
	int x;
	int y;

    Mouse(char* name) {
		g_pCursorSurface = IMG_Load(name);
		SDL_SetColorKey(g_pCursorSurface, SDL_SRCCOLORKEY, 0);
	}

	SDL_Surface *g_pCursorSurface;
};

Mouse mouse("cursor_ico.gif");

class Key {
public:

	Key() {
		q = false;
	}

	bool q;
};
Key key;

class System {
public:

    System() {
		fullscreen = false;
	}

	bool fullscreen;
};
System sys;

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/* Null Level Editor: PC Version
   Written in C/++ with SDL
   by Falco Jaenisch aka "GyroVorbis"

   Copyright Team Chaos
   http://thechaosrift.com
*/

#include "sdl.h"
#include "SDL_image.h"
#include "sdl_ttf.h"
#include <stdio.h>
#include <stdlib.h>

#include "null.h"

int main(int argc, char *argv[]) {

	if(SDL_Init(SDL_INIT_VIDEO) == -1) {
		fprintf(stderr, "Could not initialize SDL!\n");
        exit(1);
    }
    else
        fprintf(stdout, "SDL initialized properly!\n");
        atexit(SDL_Quit);
    }
	if(!TTF_Init()) atexit(TTF_Quit);
	else if(TTF_Init() == -1) fprintf(stderr, "SDL_TTF unable to initialize!\n");


	SDL_WM_SetCaption("Null Level Editor: PC Version", "Null Level Editor: PC Version");
	SDL_WM_SetIcon(g_pIcoSurface, NULL);
	SDL_ShowCursor(SDL_DISABLE);

    g_pMainSurface = SDL_SetVideoMode(640, 480, 0, SDL_ANYFORMAT);
   
    if(!g_pMainSurface) {
        fprintf(stderr,"Could not create main surface!\n");
        exit(1);
    }

    while(1) {
		if(SDL_PollEvent(&g_Event)) {
            if(g_Event.type == SDL_QUIT)
                break;
		}
		
		UpdateMouse();
		KeyboardInput();
		KeyLogic();
		Text();

		SDL_UpdateRect(g_pMainSurface, 0, 0, 0, 0);

		g_color = SDL_MapRGB(g_pMainSurface->format, 0, 0, 0);
		SDL_FillRect(g_pMainSurface, NULL, g_color);
	}

	TTF_CloseFont(g_Font);
	fprintf(stdout,"Terminating program normally.\n");
	return(0);
} 

void UpdateMouse() {
	SDL_PumpEvents();
	SDL_GetMouseState(&mouse.x, &mouse.y);
	//if(SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(1))

	g_Rect.x = mouse.x;
	g_Rect.y = mouse.y;
	SDL_BlitSurface(mouse.g_pCursorSurface, NULL, g_pMainSurface, &g_Rect);
}

void KeyboardInput() {
	SDL_PumpEvents();
	key_array = SDL_GetKeyState(NULL);

	if(key.q) {
		if(key_array[SDLK_q])
			key.q = false;
		if(!key_array[SDLK_q])
			key.q = false;
	}
	else
		if(key_array[SDLK_q])
			key.q = true;

	if(key_array[SDLK_ESCAPE]) exit(1);
}

void KeyLogic() {
	if(key.q && sys.fullscreen) {
		g_pMainSurface = SDL_SetVideoMode(640,480,0,SDL_ANYFORMAT);
		sys.fullscreen = false;
	}
	else if (key.q && !sys.fullscreen) {
		g_pMainSurface = SDL_SetVideoMode(640,480,0,SDL_FULLSCREEN);
		sys.fullscreen = true;
	}
}

void Text() {
	//set up color
	SDL_Color color;
	color.r = 0;
	color.g = 255;
	color.b = 100;

	g_pTextSurface = TTF_RenderText_Blended(g_Font, "Hello, world!", color);

	//rectangles
	SDL_Rect rcSrc;
	SDL_Rect rcDst;

	//source rectangle
	rcSrc.x = 0;
	rcSrc.y = 0;
	rcSrc.w = g_pTextSurface->w;
	rcSrc.h = g_pTextSurface->h;

	//destination rectangle
	rcDst = rcSrc;
	rcDst.x = (SCREEN_WIDTH-rcDst.w)/2;
	rcDst.y = (SCREEN_HEIGHT-rcDst.h)/2;

	//blit the surface
	SDL_BlitSurface(g_pTextSurface, &rcSrc, g_pMainSurface, &rcDst);
}

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g_pTextSurface = TTF_RenderText_Blended(g_Font, "Hello, world!", color);

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Segmentation Fault (Deploying SDL Parachute)