2 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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.
8 Permission is granted to anyone to use this software for any purpose,
9 including commercial applications, and to alter it and redistribute it
13 /* Program to test querying of display info */
21 print_mode(const char *prefix, const SDL_DisplayMode *mode)
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);
31 main(int argc, char *argv[])
34 int num_displays, dpy;
36 /* Enable standard application logging */
37 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
39 /* Load the SDL library */
40 if (SDL_Init(SDL_INIT_VIDEO) < 0) {
41 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
45 SDL_Log("Using video target '%s'.\n", SDL_GetCurrentVideoDriver());
46 num_displays = SDL_GetNumVideoDisplays();
48 SDL_Log("See %d displays.\n", num_displays);
50 for (dpy = 0; dpy < num_displays; dpy++) {
51 const int num_modes = SDL_GetNumDisplayModes(dpy);
52 SDL_Rect rect = { 0, 0, 0, 0 };
53 float ddpi, hdpi, vdpi;
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);
59 if (SDL_GetDisplayDPI(dpy, &ddpi, &hdpi, &vdpi) == -1) {
60 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " DPI: failed to query (%s)\n", SDL_GetError());
62 SDL_Log(" DPI: ddpi=%f; hdpi=%f; vdpi=%f\n", ddpi, hdpi, vdpi);
65 if (SDL_GetCurrentDisplayMode(dpy, &mode) == -1) {
66 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " CURRENT: failed to query (%s)\n", SDL_GetError());
68 print_mode("CURRENT", &mode);
71 if (SDL_GetDesktopDisplayMode(dpy, &mode) == -1) {
72 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " DESKTOP: failed to query (%s)\n", SDL_GetError());
74 print_mode("DESKTOP", &mode);
77 for (m = 0; m < num_modes; m++) {
78 if (SDL_GetDisplayMode(dpy, m, &mode) == -1) {
79 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " MODE %d: failed to query (%s)\n", m, SDL_GetError());
82 SDL_snprintf(prefix, sizeof (prefix), " MODE %d", m);
83 print_mode(prefix, &mode);
94 /* vi: set ts=4 sw=4 expandtab: */