test/testdisplayinfo.c
author Philipp Wiesemann <philipp.wiesemann@arcor.de>
Wed, 15 Jul 2015 21:10:38 +0200
changeset 9802 387821246318
parent 9800 978b538d177e
child 9833 c3214bb33a1d
permissions -rw-r--r--
Fixed comment in test program.
     1 /*
     2   Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
     3 
     4   This software is provided 'as-is', without any express or implied
     5   warranty.  In no event will the authors be held liable for any damages
     6   arising from the use of this software.
     7 
     8   Permission is granted to anyone to use this software for any purpose,
     9   including commercial applications, and to alter it and redistribute it
    10   freely.
    11 */
    12 
    13 /* Program to test querying of display info */
    14 
    15 #include "SDL.h"
    16 
    17 #include <stdio.h>
    18 #include <stdlib.h>
    19 
    20 static void
    21 print_mode(const char *prefix, const SDL_DisplayMode *mode)
    22 {
    23     if (!mode)
    24         return;
    25 
    26     SDL_Log("%s: fmt=%s w=%d h=%d refresh=%d\n",
    27             prefix, SDL_GetPixelFormatName(mode->format),
    28             mode->w, mode->h, mode->refresh_rate);
    29 }
    30 
    31 int
    32 main(int argc, char *argv[])
    33 {
    34     SDL_DisplayMode mode;
    35     int num_displays, dpy;
    36 
    37 	/* Enable standard application logging */
    38 	SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
    39 
    40     /* Load the SDL library */
    41     if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    42         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
    43         return 1;
    44     }
    45 
    46     SDL_Log("Using video target '%s'.\n", SDL_GetCurrentVideoDriver());
    47     num_displays = SDL_GetNumVideoDisplays();
    48 
    49     SDL_Log("See %d displays.\n", num_displays);
    50 
    51     for (dpy = 0; dpy < num_displays; dpy++) {
    52         const int num_modes = SDL_GetNumDisplayModes(dpy);
    53         SDL_Rect rect = { 0, 0, 0, 0 };
    54         int m;
    55 
    56         SDL_GetDisplayBounds(dpy, &rect);
    57         SDL_Log("%d: \"%s\" (%dx%d, (%d, %d)), %d modes.\n", dpy, SDL_GetDisplayName(dpy), rect.w, rect.h, rect.x, rect.y, num_modes);
    58 
    59         if (SDL_GetCurrentDisplayMode(dpy, &mode) == -1) {
    60             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "    CURRENT: failed to query (%s)\n", SDL_GetError());
    61         } else {
    62             print_mode("CURRENT", &mode);
    63         }
    64 
    65         if (SDL_GetDesktopDisplayMode(dpy, &mode) == -1) {
    66             SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "    DESKTOP: failed to query (%s)\n", SDL_GetError());
    67         } else {
    68             print_mode("DESKTOP", &mode);
    69         }
    70 
    71         for (m = 0; m < num_modes; m++) {
    72             if (SDL_GetDisplayMode(dpy, m, &mode) == -1) {
    73                 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "    MODE %d: failed to query (%s)\n", m, SDL_GetError());
    74             } else {
    75                 char prefix[64];
    76                 SDL_snprintf(prefix, sizeof (prefix), "    MODE %d", m);
    77                 print_mode(prefix, &mode);
    78             }
    79         }
    80 
    81         SDL_Log("\n");
    82     }
    83 
    84     return 0;
    85 }
    86 
    87 /* vi: set ts=4 sw=4 expandtab: */
    88