/* Author: Josh Holtrop
 * DornerWorks screensaver
 * This was a for-fun project I started working on in November '07
 * because I like 3D graphics. I modeled the DornerWorks logo in
 * blender, exported it to an Alias WaveFront object and material
 * file, wrote an Alias Wavefront object loader, and then wrapped
 * some OpenGL and ODE logic around it for various screensaver modes
 */

#include <iostream>
#include <string>
#include <SDL.h>
#include <SDL_syswm.h>
#include <ode/ode.h>
#include "displayinfo.h"
#include "ss/SSMain.h"
using namespace std;

#define PROGNAME "dwscr"
#define DEFAULT_WIDTH  1024
#define DEFAULT_HEIGHT 768

/* main function, called upon program invocation */
int main(int argc, char * argv[])
{
#ifdef WIN32
    bool start = false;
#else
    bool start = true;
#endif
    SDL_Surface * sdlSurface;
    int width = DEFAULT_WIDTH;
    int height = DEFAULT_HEIGHT;
    bool windowed = false;
    bool multisample = true;

#ifdef DEBUG
    start = true;
#endif

    getDisplaySize(&width, &height);

    /* extremely simple command-line argument handling */
    for (int i = 1; i < argc; i++)
    {
        if (!strcmp("/s", argv[i]))
            start = true;
        else if (!strcmp("-W", argv[i]))
            windowed = true;
        else if (!strncmp("-w", argv[i], 2))
        {
            width = atoi( (strlen(argv[i]) > 2)
                          ? argv[i] + 2
                          : argv[++i] );
        }
        else if (!strncmp("-h", argv[i], 2))
        {
            height = atoi( (strlen(argv[i]) > 2)
                           ? argv[i] + 2
                           : argv[++i] );
        }
        else if (!strcmp("+m", argv[i]))
        {
            multisample = false;
        }
    }

    /* make the SDL window appear in the top-left corner of the screen */
    if (!windowed)
        putenv((char *) "SDL_VIDEO_WINDOW_POS=0,0");

    /* do not disable power management (this will allow monitors
     * to power off at the normally configured timeout) */
    putenv((char *) "SDL_VIDEO_ALLOW_SCREENSAVER=1");

    if (!start)
        return 0;

    /* initialize SDL library */
    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER))
    {
        cerr << "Error initializing video!" << endl;
        return -1;
    }

    SDL_GL_SetAttribute(SDL_GL_SWAP_CONTROL, 1);
    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

    /* Enable multisampling */
    if (multisample)
    {
        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1);
        SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 4);
    }

    int sdlMode = SDL_HWSURFACE | SDL_OPENGL;
    if (!windowed)
        sdlMode |= SDL_NOFRAME;
    if ((sdlSurface = SDL_SetVideoMode(width, height, 0, sdlMode)) == NULL)
    {
        cerr << "Error setting video mode!" << endl;
        return -2;
    }

    SDL_WM_SetCaption("dwscr", "dwscr");
    if (!windowed)
    {
        SDL_WM_GrabInput(SDL_GRAB_ON);
        SDL_ShowCursor(SDL_DISABLE);
    }

    dInitODE();

    /* after our window is created and SDL and OpenGL are initialized,
     * start the main screensaver functionality */
    int num_monitors = windowed ? 1 : getNumMonitors();
    SSMain ss(width, height, num_monitors, sdlSurface);
    ss.run();

    dCloseODE();
    SDL_Quit();
    return 0;
}