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96 lines
2.9 KiB
96 lines
2.9 KiB
/* |
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> |
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This software is provided 'as-is', without any express or implied |
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warranty. In no event will the authors be held liable for any damages |
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arising from the use of this software. |
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Permission is granted to anyone to use this software for any purpose, |
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including commercial applications, and to alter it and redistribute it |
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freely. |
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*/ |
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/* Program to test querying of display info */ |
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#include "SDL.h" |
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#include <stdio.h> |
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#include <stdlib.h> |
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static void |
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print_mode(const char *prefix, const SDL_DisplayMode *mode) |
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{ |
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if (!mode) |
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return; |
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SDL_Log("%s: fmt=%s w=%d h=%d refresh=%d\n", |
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prefix, SDL_GetPixelFormatName(mode->format), |
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mode->w, mode->h, mode->refresh_rate); |
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} |
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int |
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main(int argc, char *argv[]) |
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{ |
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SDL_DisplayMode mode; |
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int num_displays, dpy; |
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/* Enable standard application logging */ |
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); |
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/* Load the SDL library */ |
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if (SDL_Init(SDL_INIT_VIDEO) < 0) { |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError()); |
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return 1; |
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} |
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SDL_Log("Using video target '%s'.\n", SDL_GetCurrentVideoDriver()); |
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num_displays = SDL_GetNumVideoDisplays(); |
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SDL_Log("See %d displays.\n", num_displays); |
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for (dpy = 0; dpy < num_displays; dpy++) { |
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const int num_modes = SDL_GetNumDisplayModes(dpy); |
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SDL_Rect rect = { 0, 0, 0, 0 }; |
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float ddpi, hdpi, vdpi; |
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int m; |
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SDL_GetDisplayBounds(dpy, &rect); |
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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); |
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if (SDL_GetDisplayDPI(dpy, &ddpi, &hdpi, &vdpi) == -1) { |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " DPI: failed to query (%s)\n", SDL_GetError()); |
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} else { |
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SDL_Log(" DPI: ddpi=%f; hdpi=%f; vdpi=%f\n", ddpi, hdpi, vdpi); |
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} |
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if (SDL_GetCurrentDisplayMode(dpy, &mode) == -1) { |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " CURRENT: failed to query (%s)\n", SDL_GetError()); |
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} else { |
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print_mode("CURRENT", &mode); |
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} |
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if (SDL_GetDesktopDisplayMode(dpy, &mode) == -1) { |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " DESKTOP: failed to query (%s)\n", SDL_GetError()); |
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} else { |
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print_mode("DESKTOP", &mode); |
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} |
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for (m = 0; m < num_modes; m++) { |
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if (SDL_GetDisplayMode(dpy, m, &mode) == -1) { |
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " MODE %d: failed to query (%s)\n", m, SDL_GetError()); |
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} else { |
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char prefix[64]; |
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SDL_snprintf(prefix, sizeof (prefix), " MODE %d", m); |
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print_mode(prefix, &mode); |
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} |
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} |
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SDL_Log("\n"); |
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} |
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SDL_Quit(); |
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return 0; |
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} |
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/* vi: set ts=4 sw=4 expandtab: */ |
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