OpenXcom inception

#include <SDL.h>
#include <fstream>

using namespace std;

SDL_Surface *loadScr(string filename)
{
    SDL_Surface *surface;

    // Create surface
    surface = SDL_CreateRGBSurface(SDL_HWSURFACE, 320, 200, 8, 0, 0, 0, 0);

    if (surface == NULL)
    {
        throw SDL_GetError();
    }

    // Lock the surface
    SDL_LockSurface(surface);

    Uint8 *index = (Uint8 *)surface->pixels;

    // Load file and put pixels in surface
    ifstream imgFile (filename.c_str(), ios::in | ios::binary);
    if (!imgFile)
    {
        throw "Failed to load SCR";
    }

    char value;

    while (imgFile.read(&value, 1))
    {
        *index = Uint8(value);
        index++;
    }

    if (!imgFile.eof())
    {
        throw "Invalid data from file";
    }

    // Unlock the surface
    SDL_UnlockSurface(surface);

    imgFile.close();

    return surface;
}

SDL_Color *loadPalette(string filename, int ncolors, int offset)
{
    SDL_Color *colors = (SDL_Color *)malloc(sizeof(SDL_Color) * ncolors);

    // Load file and put colors in pallete
    ifstream palFile (filename.c_str(), ios::in | ios::binary);
    if (!palFile)
    {
        throw "Failed to load palette";
    }

    // Move pointer to proper pallete
    palFile.seekg(offset, ios::beg);

    char value[3];

    for (int j = 0; j < ncolors && palFile.read(value, 3); j++)
    {
        // Correct X-Com colors to RGB colors
        colors[j].r = Uint8(value[0])*4;
        colors[j].g = Uint8(value[1])*4;
        colors[j].b = Uint8(value[2])*4;
    }

    /*
    if (!palFile.eof())
    {
        throw "Invalid data from file";
    }
    */

    palFile.close();

    return colors;
}

SDL_Surface *testSurface()
{
    SDL_Surface *surface;

    // Create surface
    surface = SDL_CreateRGBSurface(SDL_HWSURFACE, 256, 25, 8, 0, 0, 0, 0);

    if (surface == NULL)
    {
        throw SDL_GetError();
    }

    // Lock the surface
    SDL_LockSurface(surface);

    Uint8 *index = (Uint8 *)surface->pixels;

    for (int j = 0; j < 25; j++)
        for (int i = 0; i < 256; i++, index++)
            *index = i;

    // Unlock the surface
    SDL_UnlockSurface(surface);

    return surface;
}

int main(int argc, char** args)
{
    // Initialize SDL
    if (SDL_Init(SDL_INIT_EVERYTHING) < 0)
    {
        throw SDL_GetError();
    }

    // Set the window caption
    SDL_WM_SetCaption("X-Com Open Source", NULL);

    // Create display
    SDL_Surface *screen = SDL_SetVideoMode(320, 200, 8, SDL_DOUBLEBUF|SDL_HWPALETTE);

    // Create test surface
    SDL_Surface *surface = loadScr("GEODATA\\BACK01.SCR");

    // Apply palette
    SDL_Color *palette = loadPal("GEODATA\\PALETTES.DAT", 256, 0);
    SDL_SetColors(screen, palette, 0, 256);
    SDL_SetColors(surface, palette, 0, 256);

    // Game loop
    bool quit = false;
    SDL_Event event;
    while (quit)
    {
        // Process events
        while (SDL_PollEvent(&event))
        {
            if (event.type == SDL_QUIT)
            {
                quit = true;
            }
        }

        // Process rendering
        SDL_BlitSurface(surface, NULL, screen, NULL);
        if (SDL_Flip(screen) == -1)
        {
            throw SDL_GetError();
        }
    }

    // RIP
    SDL_Quit();

    return 0;
}