test/testdisplayinfo.c
author Ryan C. Gordon <icculus@icculus.org>
Fri, 12 Aug 2016 19:59:00 -0400
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permissions -rw-r--r--
emscripten: send fake mouse events for touches, like other targets do. (This really should be handled at the higher level and not in the individual targets, but this fixes the immediate bug.)
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/*
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  Copyright (C) 1997-2016 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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