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[HTML5] Detect screen scale and DPI.

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`OS.get_screen_scale` will now return the `window.devicePixelRatio`
value, `OS.get_screen_dpi` uses CSS media queries to find approximate
DPI value for the current display.
`OS.get_screen_size` also return the actual screen size (not the CSS
pixel size).
This commit is contained in:
Fabio Alessandrelli 2021-02-12 10:50:02 +01:00
parent e9a25b8552
commit 6cff589b5b
4 changed files with 35 additions and 2 deletions
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9
platform/javascript/display_server_javascript.cpp
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@ -845,7 +845,8 @@ Size2i DisplayServerJavaScript::screen_get_size(int p_screen) const {
EmscriptenFullscreenChangeEvent ev;
EMSCRIPTEN_RESULT result = emscripten_get_fullscreen_status(&ev);
ERR_FAIL_COND_V(result != EMSCRIPTEN_RESULT_SUCCESS, Size2i());
return Size2i(ev.screenWidth, ev.screenHeight);
double scale = godot_js_display_pixel_ratio_get();
return Size2i(ev.screenWidth * scale, ev.screenHeight * scale);
}
Rect2i DisplayServerJavaScript::screen_get_usable_rect(int p_screen) const {
@ -855,7 +856,11 @@ Rect2i DisplayServerJavaScript::screen_get_usable_rect(int p_screen) const {
}
int DisplayServerJavaScript::screen_get_dpi(int p_screen) const {
return 96; // TODO maybe check pixel ratio via window.devicePixelRatio * 96? Inexact.
return godot_js_display_screen_dpi_get();
}
float DisplayServerJavaScript::screen_get_scale(int p_screen) const {
return godot_js_display_pixel_ratio_get();
}
Vector<DisplayServer::WindowID> DisplayServerJavaScript::get_window_list() const {