Emscripten: use a fake size for external sizing check
The check would fail if the canvas happened to be the correct size
already. (#66, mentioned in #58)
diff --git a/src/video/emscripten/SDL_emscriptenvideo.c b/src/video/emscripten/SDL_emscriptenvideo.c
index 77592a3..d5bbf27 100644
--- a/src/video/emscripten/SDL_emscriptenvideo.c
+++ b/src/video/emscripten/SDL_emscriptenvideo.c
@@ -206,21 +206,22 @@
scaled_w = SDL_floor(window->w * wdata->pixel_ratio);
scaled_h = SDL_floor(window->h * wdata->pixel_ratio);
- emscripten_set_canvas_size(scaled_w, scaled_h);
-
+ /* set a fake size to check if there is any CSS sizing the canvas */
+ emscripten_set_canvas_size(1, 1);
emscripten_get_element_css_size(NULL, &css_w, &css_h);
- wdata->external_size = SDL_floor(css_w) != scaled_w || SDL_floor(css_h) != scaled_h;
+ wdata->external_size = SDL_floor(css_w) != 1 || SDL_floor(css_h) != 1;
if ((window->flags & SDL_WINDOW_RESIZABLE) && wdata->external_size) {
/* external css has resized us */
scaled_w = css_w * wdata->pixel_ratio;
scaled_h = css_h * wdata->pixel_ratio;
- emscripten_set_canvas_size(scaled_w, scaled_h);
SDL_SendWindowEvent(window, SDL_WINDOWEVENT_RESIZED, css_w, css_h);
}
+ emscripten_set_canvas_size(scaled_w, scaled_h);
+
/* if the size is not being controlled by css, we need to scale down for hidpi */
if (!wdata->external_size) {
if (wdata->pixel_ratio != 1.0f) {
