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Reduce idle cpu usage #285

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Reduce idle cpu usage #285

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6 changes: 3 additions & 3 deletions data/core/init.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -377,6 +377,9 @@ function core.step()
end
core.redraw = true
end

if not core.redraw and not system.window_has_focus() then return false end

if mouse_moved then
core.try(core.on_event, "mousemoved", mouse.x, mouse.y, mouse.dx, mouse.dy)
end
Expand Down Expand Up @@ -453,9 +456,6 @@ function core.run()
core.frame_start = system.get_time()
local did_redraw = core.step()
run_threads()
if not did_redraw and not system.window_has_focus() then
system.wait_event(0.25)
end
local elapsed = system.get_time() - core.frame_start
system.sleep(math.max(0, 1 / config.fps - elapsed))
end
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8 changes: 0 additions & 8 deletions src/api/system.c
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Original file line number Diff line number Diff line change
Expand Up @@ -132,13 +132,6 @@ static int f_poll_event(lua_State *L) {
}


static int f_wait_event(lua_State *L) {
double n = luaL_checknumber(L, 1);
lua_pushboolean(L, SDL_WaitEventTimeout(NULL, n * 1000));
return 1;
}


static SDL_Cursor* cursor_cache[SDL_SYSTEM_CURSOR_HAND + 1];

static const char *cursor_opts[] = {
Expand Down Expand Up @@ -381,7 +374,6 @@ static int f_fuzzy_match(lua_State *L) {

static const luaL_Reg lib[] = {
{ "poll_event", f_poll_event },
{ "wait_event", f_wait_event },
{ "set_cursor", f_set_cursor },
{ "set_window_title", f_set_window_title },
{ "set_window_mode", f_set_window_mode },
Expand Down