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emscripten: Introduce SDL_HINT_EMSCRIPTEN_ASYNCIFY

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See https://github.com/emscripten-core/emscripten/issues/10746

and

https://github.com/emscripten-ports/SDL2/pull/112

Fixes Bugzilla #4997.
This commit is contained in:
Sylvain Beucler
2020-06-27 16:25:47 -04:00
parent 01af7b0254
commit e594a6738a
4 changed files with 22 additions and 4 deletions
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3
src/video/emscripten/SDL_emscriptenframebuffer.c
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@@ -24,6 +24,7 @@
#include "SDL_emscriptenvideo.h"
#include "SDL_emscriptenframebuffer.h"
#include "SDL_hints.h"
int Emscripten_CreateWindowFramebuffer(_THIS, SDL_Window * window, Uint32 * format, void ** pixels, int *pitch)
@@ -163,7 +164,7 @@ int Emscripten_UpdateWindowFramebuffer(_THIS, SDL_Window * window, const SDL_Rec
SDL_SaveBMP(surface, file);
}*/
if (emscripten_has_asyncify()) {
if (emscripten_has_asyncify() && SDL_GetHintBoolean(SDL_HINT_EMSCRIPTEN_ASYNCIFY, SDL_TRUE)) {
/* give back control to browser for screen refresh */
emscripten_sleep(0);
}