Пример #1
0
static size_t SDL_ScanUintPtrT(const char *text, int radix, uintptr_t *valuep)
{
    const char *textstart = text;
    uintptr_t value = 0;

    if ( radix == 16 && SDL_strncmp(text, "0x", 2) == 0 ) {
        text += 2;
    }
    for ( ; ; ) {
        int v;
        if ( SDL_isdigit((unsigned char) *text) ) {
            v = *text - '0';
        } else if ( radix == 16 && SDL_isupperhex(*text) ) {
            v = 10 + (*text - 'A');
        } else if ( radix == 16 && SDL_islowerhex(*text) ) {
            v = 10 + (*text - 'a');
        } else {
            break;
        }
        value *= radix;
        value += v;
        ++text;
    }
    if ( valuep ) {
        *valuep = value;
    }
    return (text - textstart);
}
Пример #2
0
/* read a non-negative integer from the source. return -1 upon error */
static int ReadNumber(SDL_RWops *src)
{
    int number;
    unsigned char ch;

    /* Initialize return value */
    number = 0;

    /* Skip leading whitespace */
    do {
        if ( ! SDL_RWread(src, &ch, 1, 1) ) {
            return(0);
        }
        /* Eat comments as whitespace */
        if ( ch == '#' ) {  /* Comment is '#' to end of line */
            do {
                if ( ! SDL_RWread(src, &ch, 1, 1) ) {
                    return -1;
                }
            } while ( (ch != '\r') && (ch != '\n') );
        }
    } while ( SDL_isspace(ch) );

    /* Add up the number */
    do {
        number *= 10;
        number += ch-'0';

        if ( !SDL_RWread(src, &ch, 1, 1) ) {
            return -1;
        }
    } while ( SDL_isdigit(ch) );

    return(number);
}
Пример #3
0
static size_t SDL_ScanFloat(const char *text, double *valuep)
{
    const char *textstart = text;
    unsigned long lvalue = 0;
    double value = 0.0;
    SDL_bool negative = SDL_FALSE;

    if ( *text == '-' ) {
        negative = SDL_TRUE;
        ++text;
    }
    text += SDL_ScanUnsignedLong(text, 10, &lvalue);
    value += lvalue;
    if ( *text == '.' ) {
        int mult = 10;
        ++text;
        while ( SDL_isdigit((unsigned char) *text) ) {
            lvalue = *text - '0';
            value += (double)lvalue / mult;
            mult *= 10;
            ++text;
        }
    }
    if ( valuep ) {
        if ( negative && value ) {
            *valuep = -value;
        } else {
            *valuep = value;
        }
    }
    return (text - textstart);
}
Пример #4
0
static size_t
SDL_ScanLong(const char *text, int radix, long *valuep)
{
    const char *textstart = text;
    long value = 0;
    SDL_bool negative = SDL_FALSE;

    if (*text == '-') {
        negative = SDL_TRUE;
        ++text;
    }
    if (radix == 16 && SDL_strncmp(text, "0x", 2) == 0) {
        text += 2;
    }
    for (;;) {
        int v;
        if (SDL_isdigit((unsigned char) *text)) {
            v = *text - '0';
        } else if (radix == 16 && SDL_isupperhex(*text)) {
            v = 10 + (*text - 'A');
        } else if (radix == 16 && SDL_islowerhex(*text)) {
            v = 10 + (*text - 'a');
        } else {
            break;
        }
        value *= radix;
        value += v;
        ++text;
    }
    if (valuep) {
        if (negative && value) {
            *valuep = -value;
        } else {
            *valuep = value;
        }
    }
    return (text - textstart);
}
Пример #5
0
/**
 * @brief The entry point of this force feedback demo.
 * @param[in] argc Number of arguments.
 * @param[in] argv Array of argc arguments.
 */
int
main(int argc, char **argv)
{
    int i;
    char *name;
    int index;

    /* Enable standard application logging */
    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    name = NULL;
    index = -1;
    if (argc > 1) {
        size_t l;
        name = argv[1];
        if ((strcmp(name, "--help") == 0) || (strcmp(name, "-h") == 0)) {
            SDL_Log("USAGE: %s [device]\n"
                   "If device is a two-digit number it'll use it as an index, otherwise\n"
                   "it'll use it as if it were part of the device's name.\n",
                   argv[0]);
            return 0;
        }

        l = SDL_strlen(name);
        if ((l < 3) && SDL_isdigit(name[0]) && ((l == 1) || SDL_isdigit(name[1]))) {
            index = SDL_atoi(name);
            name = NULL;
        }
    }

    /* Initialize the force feedbackness */
    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_JOYSTICK |
             SDL_INIT_HAPTIC);
    SDL_Log("%d Haptic devices detected.\n", SDL_NumHaptics());
    if (SDL_NumHaptics() > 0) {
        /* We'll just use index or the first force feedback device found */
        if (name == NULL) {
            i = (index != -1) ? index : 0;
        }
        /* Try to find matching device */
        else {
            for (i = 0; i < SDL_NumHaptics(); i++) {
                if (strstr(SDL_HapticName(i), name) != NULL)
                    break;
            }

            if (i >= SDL_NumHaptics()) {
                SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to find device matching '%s', aborting.\n",
                       name);
                return 1;
            }
        }

        haptic = SDL_HapticOpen(i);
        if (haptic == NULL) {
            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Unable to create the haptic device: %s\n",
                   SDL_GetError());
            return 1;
        }
        SDL_Log("Device: %s\n", SDL_HapticName(i));
    } else {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "No Haptic devices found!\n");
        return 1;
    }

    /* We only want force feedback errors. */
    SDL_ClearError();

    if (SDL_HapticRumbleSupported(haptic) == SDL_FALSE) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Rumble not supported!\n");
        return 1;
    }
    if (SDL_HapticRumbleInit(haptic) != 0) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to initialize rumble: %s\n", SDL_GetError());
        return 1;
    }
    SDL_Log("Playing 2 second rumble at 0.5 magnitude.\n");
    if (SDL_HapticRumblePlay(haptic, 0.5, 5000) != 0) {
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to play rumble: %s\n", SDL_GetError() );
       return 1;
    }
    SDL_Delay(2000);
    SDL_Log("Stopping rumble.\n");
    SDL_HapticRumbleStop(haptic);
    SDL_Delay(2000);
    SDL_Log("Playing 2 second rumble at 0.3 magnitude.\n");
    if (SDL_HapticRumblePlay(haptic, 0.3f, 5000) != 0) {
       SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Failed to play rumble: %s\n", SDL_GetError() );
       return 1;
    }
    SDL_Delay(2000);

    /* Quit */
    if (haptic != NULL)
        SDL_HapticClose(haptic);
    SDL_Quit();

    return 0;
}
Пример #6
0
int
main(int argc, char *argv[])
{
    int i;
    Uint32 then, now, frames;

	/* Enable standard application logging */
	SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);

    /* Initialize parameters */
    num_objects = NUM_OBJECTS;

    /* Initialize test framework */
    state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }
    for (i = 1; i < argc;) {
        int consumed;

        consumed = SDLTest_CommonArg(state, i);
        if (consumed == 0) {
            consumed = -1;
            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        blendMode = SDL_BLENDMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
                        blendMode = SDL_BLENDMODE_BLEND;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
                        blendMode = SDL_BLENDMODE_ADD;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
                        blendMode = SDL_BLENDMODE_MOD;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
                cycle_color = SDL_TRUE;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
                cycle_alpha = SDL_TRUE;
                consumed = 1;
            } else if (SDL_isdigit(*argv[i])) {
                num_objects = SDL_atoi(argv[i]);
                consumed = 1;
            }
        }
        if (consumed < 0) {
            SDL_Log("Usage: %s %s [--blend none|blend|add|mod] [--cyclecolor] [--cyclealpha]\n",
                    argv[0], SDLTest_CommonUsage(state));
            return 1;
        }
        i += consumed;
    }
    if (!SDLTest_CommonInit(state)) {
        return 2;
    }

    /* Create the windows and initialize the renderers */
    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        SDL_SetRenderDrawBlendMode(renderer, blendMode);
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear(renderer);
    }

    srand((unsigned int)time(NULL));

    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;

#ifdef __EMSCRIPTEN__
    emscripten_set_main_loop(loop, 0, 1);
#else
    while (!done) {
        ++frames;
        loop();
        }
#endif


    SDLTest_CommonQuit(state);

    /* Print out some timing information */
    now = SDL_GetTicks();
    if (now > then) {
        double fps = ((double) frames * 1000) / (now - then);
        SDL_Log("%2.2f frames per second\n", fps);
    }
    return 0;
}
Пример #7
0
int
SDLTest_CommonArg(SDLTest_CommonState * state, int index)
{
    char **argv = state->argv;

    if (SDL_strcasecmp(argv[index], "--video") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->videodriver = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--renderer") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->renderdriver = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--gldebug") == 0) {
        state->gl_debug = 1;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--info") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        if (SDL_strcasecmp(argv[index], "all") == 0) {
            state->verbose |=
                (VERBOSE_VIDEO | VERBOSE_MODES | VERBOSE_RENDER |
                 VERBOSE_EVENT);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "video") == 0) {
            state->verbose |= VERBOSE_VIDEO;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "modes") == 0) {
            state->verbose |= VERBOSE_MODES;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "render") == 0) {
            state->verbose |= VERBOSE_RENDER;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "event") == 0) {
            state->verbose |= VERBOSE_EVENT;
            return 2;
        }
        return -1;
    }
    if (SDL_strcasecmp(argv[index], "--log") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        if (SDL_strcasecmp(argv[index], "all") == 0) {
            SDL_LogSetAllPriority(SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "error") == 0) {
            SDL_LogSetPriority(SDL_LOG_CATEGORY_ERROR, SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "system") == 0) {
            SDL_LogSetPriority(SDL_LOG_CATEGORY_SYSTEM, SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "audio") == 0) {
            SDL_LogSetPriority(SDL_LOG_CATEGORY_AUDIO, SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "video") == 0) {
            SDL_LogSetPriority(SDL_LOG_CATEGORY_VIDEO, SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "render") == 0) {
            SDL_LogSetPriority(SDL_LOG_CATEGORY_RENDER, SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "input") == 0) {
            SDL_LogSetPriority(SDL_LOG_CATEGORY_INPUT, SDL_LOG_PRIORITY_VERBOSE);
            return 2;
        }
        return -1;
    }
    if (SDL_strcasecmp(argv[index], "--display") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->display = SDL_atoi(argv[index]);
        if (SDL_WINDOWPOS_ISUNDEFINED(state->window_x)) {
            state->window_x = SDL_WINDOWPOS_UNDEFINED_DISPLAY(state->display);
            state->window_y = SDL_WINDOWPOS_UNDEFINED_DISPLAY(state->display);
        }
        if (SDL_WINDOWPOS_ISCENTERED(state->window_x)) {
            state->window_x = SDL_WINDOWPOS_CENTERED_DISPLAY(state->display);
            state->window_y = SDL_WINDOWPOS_CENTERED_DISPLAY(state->display);
        }
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--fullscreen") == 0) {
        state->window_flags |= SDL_WINDOW_FULLSCREEN;
        state->num_windows = 1;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--fullscreen-desktop") == 0) {
        state->window_flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
        state->num_windows = 1;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--windows") == 0) {
        ++index;
        if (!argv[index] || !SDL_isdigit(*argv[index])) {
            return -1;
        }
        if (!(state->window_flags & SDL_WINDOW_FULLSCREEN)) {
            state->num_windows = SDL_atoi(argv[index]);
        }
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--title") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->window_title = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--icon") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->window_icon = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--center") == 0) {
        state->window_x = SDL_WINDOWPOS_CENTERED;
        state->window_y = SDL_WINDOWPOS_CENTERED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--position") == 0) {
        char *x, *y;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        x = argv[index];
        y = argv[index];
        while (*y && *y != ',') {
            ++y;
        }
        if (!*y) {
            return -1;
        }
        *y++ = '\0';
        state->window_x = SDL_atoi(x);
        state->window_y = SDL_atoi(y);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--geometry") == 0) {
        char *w, *h;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        w = argv[index];
        h = argv[index];
        while (*h && *h != 'x') {
            ++h;
        }
        if (!*h) {
            return -1;
        }
        *h++ = '\0';
        state->window_w = SDL_atoi(w);
        state->window_h = SDL_atoi(h);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--min-geometry") == 0) {
        char *w, *h;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        w = argv[index];
        h = argv[index];
        while (*h && *h != 'x') {
            ++h;
        }
        if (!*h) {
            return -1;
        }
        *h++ = '\0';
        state->window_minW = SDL_atoi(w);
        state->window_minH = SDL_atoi(h);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--max-geometry") == 0) {
        char *w, *h;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        w = argv[index];
        h = argv[index];
        while (*h && *h != 'x') {
            ++h;
        }
        if (!*h) {
            return -1;
        }
        *h++ = '\0';
        state->window_maxW = SDL_atoi(w);
        state->window_maxH = SDL_atoi(h);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--logical") == 0) {
        char *w, *h;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        w = argv[index];
        h = argv[index];
        while (*h && *h != 'x') {
            ++h;
        }
        if (!*h) {
            return -1;
        }
        *h++ = '\0';
        state->logical_w = SDL_atoi(w);
        state->logical_h = SDL_atoi(h);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--scale") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->scale = (float)SDL_atof(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--depth") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->depth = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--refresh") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->refresh_rate = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--vsync") == 0) {
        state->render_flags |= SDL_RENDERER_PRESENTVSYNC;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--noframe") == 0) {
        state->window_flags |= SDL_WINDOW_BORDERLESS;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--resize") == 0) {
        state->window_flags |= SDL_WINDOW_RESIZABLE;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--minimize") == 0) {
        state->window_flags |= SDL_WINDOW_MINIMIZED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--maximize") == 0) {
        state->window_flags |= SDL_WINDOW_MAXIMIZED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--grab") == 0) {
        state->window_flags |= SDL_WINDOW_INPUT_GRABBED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--rate") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->audiospec.freq = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--format") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        if (SDL_strcasecmp(argv[index], "U8") == 0) {
            state->audiospec.format = AUDIO_U8;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S8") == 0) {
            state->audiospec.format = AUDIO_S8;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "U16") == 0) {
            state->audiospec.format = AUDIO_U16;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "U16LE") == 0) {
            state->audiospec.format = AUDIO_U16LSB;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "U16BE") == 0) {
            state->audiospec.format = AUDIO_U16MSB;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S16") == 0) {
            state->audiospec.format = AUDIO_S16;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S16LE") == 0) {
            state->audiospec.format = AUDIO_S16LSB;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S16BE") == 0) {
            state->audiospec.format = AUDIO_S16MSB;
            return 2;
        }
        return -1;
    }
    if (SDL_strcasecmp(argv[index], "--channels") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->audiospec.channels = (Uint8) SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--samples") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->audiospec.samples = (Uint16) SDL_atoi(argv[index]);
        return 2;
    }
    if ((SDL_strcasecmp(argv[index], "-h") == 0)
        || (SDL_strcasecmp(argv[index], "--help") == 0)) {
        /* Print the usage message */
        return -1;
    }
    if (SDL_strcmp(argv[index], "-NSDocumentRevisionsDebugMode") == 0) {
    /* Debug flag sent by Xcode */
        return 2;
    }
    return 0;
}
Пример #8
0
int
main(int argc, char *argv[])
{
    int i;
    Uint32 then, now, frames;
    Uint64 seed;
    const char *icon = "icon.bmp";

    /* Initialize parameters */
    num_sprites = NUM_SPRITES;

    /* Initialize test framework */
    state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }

    for (i = 1; i < argc;) {
        int consumed;

        consumed = SDLTest_CommonArg(state, i);
        if (consumed == 0) {
            consumed = -1;
            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        blendMode = SDL_BLENDMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
                        blendMode = SDL_BLENDMODE_BLEND;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
                        blendMode = SDL_BLENDMODE_ADD;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
                        blendMode = SDL_BLENDMODE_MOD;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--iterations") == 0) {
                if (argv[i + 1]) {
                    iterations = SDL_atoi(argv[i + 1]);
                    if (iterations < -1) iterations = -1;
                    consumed = 2;
                }
            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
                cycle_color = SDL_TRUE;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
                cycle_alpha = SDL_TRUE;
                consumed = 1;
            } else if (SDL_isdigit(*argv[i])) {
                num_sprites = SDL_atoi(argv[i]);
                consumed = 1;
            } else if (argv[i][0] != '-') {
                icon = argv[i];
                consumed = 1;
            }
        }
        if (consumed < 0) {
            SDL_Log("Usage: %s %s [--blend none|blend|add|mod] [--cyclecolor] [--cyclealpha] [--iterations N] [num_sprites] [icon.bmp]\n",
                    argv[0], SDLTest_CommonUsage(state));
            quit(1);
        }
        i += consumed;
    }
    if (!SDLTest_CommonInit(state)) {
        quit(2);
    }

    /* Create the windows, initialize the renderers, and load the textures */
    sprites =
        (SDL_Texture **) SDL_malloc(state->num_windows * sizeof(*sprites));
    if (!sprites) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
        quit(2);
    }
    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear(renderer);
    }
    if (LoadSprite(icon) < 0) {
        quit(2);
    }

    /* Allocate memory for the sprite info */
    positions = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
    velocities = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
    if (!positions || !velocities) {
        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Out of memory!\n");
        quit(2);
    }

    /* Position sprites and set their velocities using the fuzzer */ 
    if (iterations >= 0) {
        /* Deterministic seed - used for visual tests */
        seed = (Uint64)iterations;
    } else {
        /* Pseudo-random seed generated from the time */
        seed = (Uint64)time(NULL);
    }
    SDLTest_FuzzerInit(seed);
    for (i = 0; i < num_sprites; ++i) {
        positions[i].x = SDLTest_RandomIntegerInRange(0, state->window_w - sprite_w);
        positions[i].y = SDLTest_RandomIntegerInRange(0, state->window_h - sprite_h);
        positions[i].w = sprite_w;
        positions[i].h = sprite_h;
        velocities[i].x = 0;
        velocities[i].y = 0;
        while (!velocities[i].x && !velocities[i].y) {
            velocities[i].x = SDLTest_RandomIntegerInRange(-MAX_SPEED, MAX_SPEED);
            velocities[i].y = SDLTest_RandomIntegerInRange(-MAX_SPEED, MAX_SPEED);
        }
    }

    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;

#ifdef __EMSCRIPTEN__
    emscripten_set_main_loop(loop, 0, 1);
#else
    while (!done) {
        ++frames;
        loop();
    }
#endif

    /* Print out some timing information */
    now = SDL_GetTicks();
    if (now > then) {
        double fps = ((double) frames * 1000) / (now - then);
        SDL_Log("%2.2f frames per second\n", fps);
    }
    quit(0);
    return 0;
}
Пример #9
0
int
CommonArg(CommonState * state, int index)
{
    char **argv = state->argv;

    if (SDL_strcasecmp(argv[index], "--video") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->videodriver = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--renderer") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->renderdriver = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--info") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        if (SDL_strcasecmp(argv[index], "all") == 0) {
            state->verbose |=
                (VERBOSE_VIDEO | VERBOSE_MODES | VERBOSE_RENDER |
                 VERBOSE_EVENT);
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "video") == 0) {
            state->verbose |= VERBOSE_VIDEO;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "modes") == 0) {
            state->verbose |= VERBOSE_MODES;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "render") == 0) {
            state->verbose |= VERBOSE_RENDER;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "event") == 0) {
            state->verbose |= VERBOSE_EVENT;
            return 2;
        }
        return -1;
    }
    if (SDL_strcasecmp(argv[index], "--display") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->display = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--fullscreen") == 0) {
        state->window_flags |= SDL_WINDOW_FULLSCREEN;
        state->num_windows = 1;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--windows") == 0) {
        ++index;
        if (!argv[index] || !SDL_isdigit(*argv[index])) {
            return -1;
        }
        if (!(state->window_flags & SDL_WINDOW_FULLSCREEN)) {
            state->num_windows = SDL_atoi(argv[index]);
        }
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--title") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->window_title = argv[index];
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--center") == 0) {
        state->window_x = SDL_WINDOWPOS_CENTERED;
        state->window_y = SDL_WINDOWPOS_CENTERED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--position") == 0) {
        char *x, *y;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        x = argv[index];
        y = argv[index];
        while (*y && *y != ',') {
            ++y;
        }
        if (!*y) {
            return -1;
        }
        *y++ = '\0';
        state->window_x = SDL_atoi(x);
        state->window_y = SDL_atoi(y);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--geometry") == 0) {
        char *w, *h;
        ++index;
        if (!argv[index]) {
            return -1;
        }
        w = argv[index];
        h = argv[index];
        while (*h && *h != 'x') {
            ++h;
        }
        if (!*h) {
            return -1;
        }
        *h++ = '\0';
        state->window_w = SDL_atoi(w);
        state->window_h = SDL_atoi(h);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--depth") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->depth = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--refresh") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->refresh_rate = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--vsync") == 0) {
        state->render_flags |= SDL_RENDERER_PRESENTVSYNC;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--noframe") == 0) {
        state->window_flags |= SDL_WINDOW_BORDERLESS;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--resize") == 0) {
        state->window_flags |= SDL_WINDOW_RESIZABLE;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--minimize") == 0) {
        state->window_flags |= SDL_WINDOW_MINIMIZED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--maximize") == 0) {
        state->window_flags |= SDL_WINDOW_MAXIMIZED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--grab") == 0) {
        state->window_flags |= SDL_WINDOW_INPUT_GRABBED;
        return 1;
    }
    if (SDL_strcasecmp(argv[index], "--rate") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->audiospec.freq = SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--format") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        if (SDL_strcasecmp(argv[index], "U8") == 0) {
            state->audiospec.format = AUDIO_U8;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S8") == 0) {
            state->audiospec.format = AUDIO_S8;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "U16") == 0) {
            state->audiospec.format = AUDIO_U16;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "U16LE") == 0) {
            state->audiospec.format = AUDIO_U16LSB;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "U16BE") == 0) {
            state->audiospec.format = AUDIO_U16MSB;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S16") == 0) {
            state->audiospec.format = AUDIO_S16;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S16LE") == 0) {
            state->audiospec.format = AUDIO_S16LSB;
            return 2;
        }
        if (SDL_strcasecmp(argv[index], "S16BE") == 0) {
            state->audiospec.format = AUDIO_S16MSB;
            return 2;
        }
        return -1;
    }
    if (SDL_strcasecmp(argv[index], "--channels") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->audiospec.channels = (Uint8) SDL_atoi(argv[index]);
        return 2;
    }
    if (SDL_strcasecmp(argv[index], "--samples") == 0) {
        ++index;
        if (!argv[index]) {
            return -1;
        }
        state->audiospec.samples = (Uint16) SDL_atoi(argv[index]);
        return 2;
    }
    if ((SDL_strcasecmp(argv[index], "-h") == 0)
        || (SDL_strcasecmp(argv[index], "--help") == 0)) {
        /* Print the usage message */
        return -1;
    }
    return 0;
}
Пример #10
0
int
main(int argc, char *argv[])
{
    int i, done;
    SDL_Event event;
    Uint32 then, now, frames;

    /* Initialize parameters */
    num_sprites = NUM_SPRITES;

    /* Initialize test framework */
    state = CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }
    for (i = 1; i < argc;) {
        int consumed;

        consumed = CommonArg(state, i);
        if (consumed == 0) {
            consumed = -1;
            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        blendMode = SDL_BLENDMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mask") == 0) {
                        blendMode = SDL_BLENDMODE_MASK;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
                        blendMode = SDL_BLENDMODE_BLEND;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
                        blendMode = SDL_BLENDMODE_ADD;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
                        blendMode = SDL_BLENDMODE_MOD;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--scale") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        scaleMode = SDL_TEXTURESCALEMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "fast") == 0) {
                        scaleMode = SDL_TEXTURESCALEMODE_FAST;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "slow") == 0) {
                        scaleMode = SDL_TEXTURESCALEMODE_SLOW;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "best") == 0) {
                        scaleMode = SDL_TEXTURESCALEMODE_BEST;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
                cycle_color = SDL_TRUE;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
                cycle_alpha = SDL_TRUE;
                consumed = 1;
            } else if (SDL_isdigit(*argv[i])) {
                num_sprites = SDL_atoi(argv[i]);
                consumed = 1;
            }
        }
        if (consumed < 0) {
            fprintf(stderr,
                    "Usage: %s %s [--blend none|mask|blend|add|mod] [--scale none|fast|slow|best] [--cyclecolor] [--cyclealpha]\n",
                    argv[0], CommonUsage(state));
            quit(1);
        }
        i += consumed;
    }
    if (!CommonInit(state)) {
        quit(2);
    }

    /* Create the windows, initialize the renderers, and load the textures */
    sprites =
        (SDL_TextureID *) SDL_malloc(state->num_windows * sizeof(*sprites));
    if (!sprites) {
        fprintf(stderr, "Out of memory!\n");
        quit(2);
    }
    for (i = 0; i < state->num_windows; ++i) {
        SDL_SelectRenderer(state->windows[i]);
        SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderRect(NULL);
    }
    if (LoadSprite("icon.bmp") < 0) {
        quit(2);
    }

    /* Allocate memory for the sprite info */
    positions = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
    velocities = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
    if (!positions || !velocities) {
        fprintf(stderr, "Out of memory!\n");
        quit(2);
    }
    srand(time(NULL));
    if (scaleMode != SDL_TEXTURESCALEMODE_NONE) {
        sprite_w += sprite_w / 2;
        sprite_h += sprite_h / 2;
    }
    for (i = 0; i < num_sprites; ++i) {
        positions[i].x = rand() % (state->window_w - sprite_w);
        positions[i].y = rand() % (state->window_h - sprite_h);
        positions[i].w = sprite_w;
        positions[i].h = sprite_h;
        velocities[i].x = 0;
        velocities[i].y = 0;
        while (!velocities[i].x && !velocities[i].y) {
            velocities[i].x = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
            velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
        }
    }

    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;
    while (!done) {
        /* Check for events */
        ++frames;
        while (SDL_PollEvent(&event)) {
            CommonEvent(state, &event, &done);
            switch (event.type) {
            case SDL_WINDOWEVENT:
                switch (event.window.event) {
                case SDL_WINDOWEVENT_EXPOSED:
                    SDL_SelectRenderer(event.window.windowID);
                    SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
                    SDL_RenderRect(NULL);
                    break;
                }
                break;
            default:
                break;
            }
        }
        for (i = 0; i < state->num_windows; ++i) {
            MoveSprites(state->windows[i], sprites[i]);
        }
    }

    /* 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);
    }
    quit(0);
}
Пример #11
0
int
main(int argc, char *argv[])
{
    int i, done;
    SDL_Event event;
    Uint32 then, now, frames;

    /* Initialize parameters */
    num_sprites = NUM_SPRITES;

    /* Initialize test framework */
    state = CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }

    state->window_flags |= SDL_WINDOW_RESIZABLE;

    for (i = 1; i < argc;) {
        int consumed;

        consumed = CommonArg(state, i);
        if (consumed == 0) {
            consumed = -1;
            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        blendMode = SDL_BLENDMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
                        blendMode = SDL_BLENDMODE_BLEND;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
                        blendMode = SDL_BLENDMODE_ADD;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
                        blendMode = SDL_BLENDMODE_MOD;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
                cycle_color = SDL_TRUE;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
                cycle_alpha = SDL_TRUE;
                consumed = 1;
            } else if (SDL_isdigit(*argv[i])) {
                num_sprites = SDL_atoi(argv[i]);
                consumed = 1;
            }
        }
        if (consumed < 0) {
            fprintf(stderr,
                    "Usage: %s %s [--blend none|blend|add|mod] [--cyclecolor] [--cyclealpha]\n",
                    argv[0], CommonUsage(state));
            quit(1);
        }
        i += consumed;
    }
    if (!CommonInit(state)) {
        quit(2);
    }

    /* Create the windows, initialize the renderers, and load the textures */
    sprites =
        (SDL_Texture **) SDL_malloc(state->num_windows * sizeof(*sprites));
    if (!sprites) {
        fprintf(stderr, "Out of memory!\n");
        quit(2);
    }
    for (i = 0; i < state->num_windows; ++i) {
        SDL_Renderer *renderer = state->renderers[i];
        SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear(renderer);
    }
    if (LoadSprite("icon.bmp") < 0) {
        quit(2);
    }

    /* Allocate memory for the sprite info */
    positions = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
    velocities = (SDL_Rect *) SDL_malloc(num_sprites * sizeof(SDL_Rect));
    if (!positions || !velocities) {
        fprintf(stderr, "Out of memory!\n");
        quit(2);
    }
    srand((unsigned int)time(NULL));
    for (i = 0; i < num_sprites; ++i) {
        positions[i].x = rand() % (state->window_w - sprite_w);
        positions[i].y = rand() % (state->window_h - sprite_h);
        positions[i].w = sprite_w;
        positions[i].h = sprite_h;
        velocities[i].x = 0;
        velocities[i].y = 0;
        while (!velocities[i].x && !velocities[i].y) {
            velocities[i].x = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
            velocities[i].y = (rand() % (MAX_SPEED * 2 + 1)) - MAX_SPEED;
        }
    }

    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;
    while (!done) {
        /* Check for events */
        ++frames;
        while (SDL_PollEvent(&event)) {
            CommonEvent(state, &event, &done);
        }
        for (i = 0; i < state->num_windows; ++i) {
            MoveSprites(state->renderers[i], sprites[i]);
        }
    }

    /* 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);
    }
    quit(0);
    return 0;
}
Пример #12
0
int
main(int argc, char *argv[])
{
    int mouse_begin_x = -1, mouse_begin_y = -1;
    int i, done;
    SDL_Event event;
    Uint32 then, now, frames;

    /* Initialize parameters */
    num_objects = NUM_OBJECTS;

    /* Initialize test framework */
    state = CommonCreateState(argv, SDL_INIT_VIDEO);
    if (!state) {
        return 1;
    }
    for (i = 1; i < argc;) {
        int consumed;

        consumed = CommonArg(state, i);
        if (consumed == 0) {
            consumed = -1;
            if (SDL_strcasecmp(argv[i], "--blend") == 0) {
                if (argv[i + 1]) {
                    if (SDL_strcasecmp(argv[i + 1], "none") == 0) {
                        blendMode = SDL_BLENDMODE_NONE;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mask") == 0) {
                        blendMode = SDL_BLENDMODE_MASK;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "blend") == 0) {
                        blendMode = SDL_BLENDMODE_BLEND;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "add") == 0) {
                        blendMode = SDL_BLENDMODE_ADD;
                        consumed = 2;
                    } else if (SDL_strcasecmp(argv[i + 1], "mod") == 0) {
                        blendMode = SDL_BLENDMODE_MOD;
                        consumed = 2;
                    }
                }
            } else if (SDL_strcasecmp(argv[i], "--cyclecolor") == 0) {
                cycle_color = SDL_TRUE;
                consumed = 1;
            } else if (SDL_strcasecmp(argv[i], "--cyclealpha") == 0) {
                cycle_alpha = SDL_TRUE;
                consumed = 1;
            } else if (SDL_isdigit(*argv[i])) {
                num_objects = SDL_atoi(argv[i]);
                consumed = 1;
            }
        }
        if (consumed < 0) {
            fprintf(stderr,
                    "Usage: %s %s [--blend none|mask|blend|add|mod] [--cyclecolor] [--cyclealpha]\n",
                    argv[0], CommonUsage(state));
            return 1;
        }
        i += consumed;
    }
    if (!CommonInit(state)) {
        return 2;
    }

    /* Create the windows and initialize the renderers */
    for (i = 0; i < state->num_windows; ++i) {
        SDL_SelectRenderer(state->windows[i]);
        SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
        SDL_RenderClear();
    }

    srand(time(NULL));

    /* Main render loop */
    frames = 0;
    then = SDL_GetTicks();
    done = 0;
    while (!done) {
        /* Check for events */
        ++frames;
        while (SDL_PollEvent(&event)) {
            CommonEvent(state, &event, &done);
            switch (event.type) {
            case SDL_MOUSEBUTTONDOWN:
                if (event.button.which == 0) {
                    mouse_begin_x = event.button.x;
                    mouse_begin_y = event.button.y;
                }
                break;
            case SDL_MOUSEBUTTONUP:
                if (event.button.which == 0) {
                    if (event.button.button == 3)
                        add_line(mouse_begin_x, mouse_begin_y, event.button.x,
                                 event.button.y);
                    if (event.button.button == 1)
                        add_rect(mouse_begin_x, mouse_begin_y, event.button.x,
                                 event.button.y);
                }
                break;
            case SDL_KEYDOWN:
                switch (event.key.keysym.sym) {
                case 'l':
                    if (event.key.keysym.mod & KMOD_SHIFT)
                        num_lines = 0;
                    else
                        add_line(rand() % 640, rand() % 480, rand() % 640,
                                 rand() % 480);
                    break;
                case 'r':
                    if (event.key.keysym.mod & KMOD_SHIFT)
                        num_rects = 0;
                    else
                        add_rect(rand() % 640, rand() % 480, rand() % 640,
                                 rand() % 480);
                    break;
                }
                break;
            case SDL_WINDOWEVENT:
                switch (event.window.event) {
                case SDL_WINDOWEVENT_EXPOSED:
                    SDL_SelectRenderer(SDL_GetWindowFromID(event.window.windowID));
                    SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
                    SDL_RenderClear();
                    break;
                }
                break;
            default:
                break;
            }
        }
        for (i = 0; i < state->num_windows; ++i) {
            SDL_SelectRenderer(state->windows[i]);
            SDL_SetRenderDrawColor(0xA0, 0xA0, 0xA0, 0xFF);
            SDL_RenderClear();

            DrawRects(state->windows[i]);
            DrawPoints(state->windows[i]);
            DrawRectRectIntersections(state->windows[i]);
            DrawLines(state->windows[i]);
            DrawRectLineIntersections(state->windows[i]);

            SDL_RenderPresent();
        }
    }

    CommonQuit(state);

    /* 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);
    }
    return 0;
}