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Removed SDL_GetDisplayDPI()

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This function wasn't consistently correct across platforms and devices.

If you want the UI scale factor, you can use display_scale in the structure returned by SDL_GetDesktopDisplayMode(). If you need an approximate DPI, you can multiply this value times 160 on iPhone and Android, and 96 on other platforms.
This commit is contained in:
Sam Lantinga
2023-02-08 15:07:13 -08:00
parent b7c6fec10a
commit 824b9b0a58
28 changed files with 32 additions and 542 deletions
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7
test/testdisplayinfo.c
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@@ -53,19 +53,12 @@ int main(int argc, char *argv[])
for (i = 0; i < num_displays; i++) {
SDL_DisplayID dpy = displays[i];
SDL_Rect rect = { 0, 0, 0, 0 };
float ddpi, hdpi, vdpi;
int m, num_modes = 0;
SDL_GetDisplayBounds(dpy, &rect);
modes = SDL_GetFullscreenDisplayModes(dpy, &num_modes);
SDL_Log("%" SDL_PRIu32 ": \"%s\" (%dx%d, (%d, %d)), %d fullscreen modes.\n", dpy, SDL_GetDisplayName(dpy), rect.w, rect.h, rect.x, rect.y, num_modes);
if (SDL_GetDisplayPhysicalDPI(dpy, &ddpi, &hdpi, &vdpi) == -1) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, " DPI: failed to query (%s)\n", SDL_GetError());
} else {
SDL_Log(" DPI: ddpi=%f; hdpi=%f; vdpi=%f\n", ddpi, hdpi, vdpi);
}
mode = SDL_GetCurrentDisplayMode(dpy);
if (mode) {
print_mode("CURRENT", mode);