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https://github.com/libsdl-org/SDL.git
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df3fea87d6
This extends the display scaling mode to be global and work in terms of pixels everywhere, with the content scale value set on displays. The per-window property had some issues, and has been removed in favor of retaining only the global hint that changes all coordinates to pixel values, sets the content scale on the displays, and generally makes the Wayland backend behave similarly to Win32 or X11. Some additional work was needed to fix cases where displays can appear to overlap, since Wayland desktops are always described in logical coordinates, and attempting to adjust the display positions so that they don't overlap can get very ugly in all but the simplest cases, as large gaps between displays can result.
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/*
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Copyright (C) 1997-2024 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 <stdlib.h>
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_main.h>
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#include <SDL3/SDL_test.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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}
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SDL_Log("%s: %dx%d@%gx, %gHz, fmt=%s\n",
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prefix,
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mode->w, mode->h, mode->pixel_density, mode->refresh_rate,
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SDL_GetPixelFormatName(mode->format));
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}
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int main(int argc, char *argv[])
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{
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SDL_DisplayID *displays;
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const SDL_DisplayMode **modes;
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const SDL_DisplayMode *mode;
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int num_displays, i;
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SDLTest_CommonState *state;
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/* Initialize test framework */
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state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
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if (!state) {
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return 1;
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}
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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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/* Parse commandline */
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if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
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return 1;
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}
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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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displays = SDL_GetDisplays(&num_displays);
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SDL_Log("See %d displays.\n", num_displays);
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for (i = 0; i < num_displays; i++) {
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SDL_DisplayID dpy = displays[i];
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SDL_Rect rect = { 0, 0, 0, 0 };
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int m, num_modes = 0;
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SDL_GetDisplayBounds(dpy, &rect);
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modes = SDL_GetFullscreenDisplayModes(dpy, &num_modes);
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SDL_Log("%" SDL_PRIu32 ": \"%s\" (%dx%d at %d,%d), content scale %.2f, %d fullscreen modes.\n", dpy, SDL_GetDisplayName(dpy), rect.w, rect.h, rect.x, rect.y, SDL_GetDisplayContentScale(dpy), num_modes);
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mode = SDL_GetCurrentDisplayMode(dpy);
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if (mode) {
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print_mode("CURRENT", mode);
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} else {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " CURRENT: failed to query (%s)\n", SDL_GetError());
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}
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mode = SDL_GetDesktopDisplayMode(dpy);
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if (mode) {
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print_mode("DESKTOP", mode);
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} else {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " DESKTOP: failed to query (%s)\n", SDL_GetError());
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}
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for (m = 0; m < num_modes; m++) {
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char prefix[64];
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(void)SDL_snprintf(prefix, sizeof(prefix), " MODE %d", m);
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print_mode(prefix, modes[m]);
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}
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SDL_free((void*)modes);
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SDL_Log("\n");
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}
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SDL_free(displays);
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SDL_Quit();
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SDLTest_CommonDestroyState(state);
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return 0;
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}
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