/*
  Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>

  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely.
*/
/* Simple program:  Fill the screen with colors as fast as possible */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>

#include "SDL.h"

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
    SDL_Quit();
    exit(rc);
}

int
main(int argc, char *argv[])
{
    SDL_Surface *screen;
    int width, height;
    Uint8 video_bpp;
    Uint32 videoflags;
    Uint32 colors[3];
    int i, done;
    SDL_Event event;
    Uint32 then, now, frames;

    /* Initialize SDL */
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
        return (1);
    }

    width = 640;
    height = 480;
    video_bpp = 8;
    videoflags = 0;
    while (argc > 1) {
        --argc;
        if (strcmp(argv[argc - 1], "-width") == 0) {
            width = atoi(argv[argc]);
            --argc;
        } else if (strcmp(argv[argc - 1], "-height") == 0) {
            height = atoi(argv[argc]);
            --argc;
        } else if (strcmp(argv[argc - 1], "-bpp") == 0) {
            video_bpp = atoi(argv[argc]);
            --argc;
        } else if (strcmp(argv[argc], "-fullscreen") == 0) {
            videoflags ^= SDL_FULLSCREEN;
        } else {
            fprintf(stderr,
                    "Usage: %s [-width N] [-height N] [-bpp N] [-fullscreen]\n",
                    argv[0]);
            quit(1);
        }
    }

    /* Set video mode */
    screen = SDL_SetVideoMode(width, height, video_bpp, 0);
    if (!screen) {
        fprintf(stderr, "Couldn't set %dx%d video mode: %s\n",
                width, height, SDL_GetError());
        quit(2);
    }

    /* Get the colors */
    colors[0] = SDL_MapRGB(screen->format, 0xFF, 0x00, 0x00);
    colors[1] = SDL_MapRGB(screen->format, 0x00, 0xFF, 0x00);
    colors[2] = SDL_MapRGB(screen->format, 0x00, 0x00, 0xFF);

    /* Loop, filling and waiting for a keystroke */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;
    while (!done) {
        /* Check for events */
        ++frames;
        while (SDL_PollEvent(&event)) {
            switch (event.type) {
            case SDL_MOUSEBUTTONDOWN:
                SDL_WarpMouse(screen->w / 2, screen->h / 2);
                break;
            case SDL_KEYDOWN:
                /* Any keypress quits the app... */
            case SDL_QUIT:
                done = 1;
                break;
            default:
                break;
            }
        }
        SDL_FillRect(screen, NULL, colors[frames%3]);
        SDL_Flip(screen);
    }

    /* Print out some timing information */
    now = SDL_GetTicks();
    if (now > then) {
        double fps = ((double) frames * 1000) / (now - then);
        printf("%2.2f frames per second\n", fps);
    }
    SDL_Quit();
    return (0);
}