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Fix SDLApp in wasm

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disarray2077 2022-02-10 12:24:27 -03:00 • committed by GitHub
parent e7fe91facb
commit 27e1a2aa7f
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1 changed files with 74 additions and 54 deletions
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128
BeefLibs/SDL2/src/SDLApp.bf
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@ -87,6 +87,9 @@ namespace SDL2
public bool* mKeyboardState;
public bool mHasAudio;
private Stopwatch mStopwatch = new .() ~ delete _;
private int mCurPhysTickCount = 0;
public this()
{
gApp = this;
@ -105,8 +108,8 @@ namespace SDL2
String exePath = scope .();
Environment.GetExecutableFilePath(exePath);
String exeDir = scope .();
Path.GetDirectoryPath(exePath, exeDir);
Directory.SetCurrentDirectory(exeDir);
if (Path.GetDirectoryPath(exePath, exeDir) case .Ok)
Directory.SetCurrentDirectory(exeDir);
SDL.Init(.Video | .Events | .Audio);
SDL.EventState(.JoyAxisMotion, .Disable);
@ -205,73 +208,90 @@ namespace SDL2
SDL.RenderPresent(mRenderer);
}
#if BF_PLATFORM_WASM
private function void em_callback_func();
[CLink, CallingConvention(.Stdcall)]
private static extern void emscripten_set_main_loop(em_callback_func func, int32 fps, int32 simulateInfinteLoop);
private static void EmscriptenMainLoop()
{
gApp.RunOneFrame();
}
#endif
public void Run()
{
Stopwatch sw = scope .();
sw.Start();
int curPhysTickCount = 0;
mStopwatch.Start();
#if BF_PLATFORM_WASM
emscripten_set_main_loop(=> EmscriptenMainLoop, -1, 1);
#else
while (true)
RunOneFrame();
#endif
}
public void RunOneFrame()
{
int32 waitTime = 1;
SDL.Event event;
while (SDL.PollEvent(out event) != 0)
{
int32 waitTime = 1;
SDL.Event event;
while (SDL.PollEvent(out event) != 0)
switch (event.type)
{
switch (event.type)
{
case .Quit:
return;
case .KeyDown:
KeyDown(event.key);
case .KeyUp:
KeyUp(event.key);
case .MouseButtonDown:
MouseDown(event.button);
case .MouseButtonUp:
MouseUp(event.button);
default:
}
HandleEvent(event);
waitTime = 0;
case .Quit:
return;
case .KeyDown:
KeyDown(event.key);
case .KeyUp:
KeyUp(event.key);
case .MouseButtonDown:
MouseDown(event.button);
case .MouseButtonUp:
MouseUp(event.button);
default:
}
// Fixed 60 Hz update
double msPerTick = 1000 / 60.0;
int newPhysTickCount = (int)(sw.ElapsedMilliseconds / msPerTick);
HandleEvent(event);
waitTime = 0;
}
int addTicks = newPhysTickCount - curPhysTickCount;
if (curPhysTickCount == 0)
// Fixed 60 Hz update
double msPerTick = 1000 / 60.0;
int newPhysTickCount = (int)(mStopwatch.ElapsedMilliseconds / msPerTick);
int addTicks = newPhysTickCount - mCurPhysTickCount;
if (mCurPhysTickCount == 0)
{
// Initial render
Render();
// Show initially hidden window, mitigates white flash on slow startups
SDL.ShowWindow(mWindow);
}
else
{
mKeyboardState = SDL.GetKeyboardState(null);
addTicks = Math.Min(addTicks, 20); // Limit catchup
if (addTicks > 0)
{
// Initial render
Render();
// Show initially hidden window, mitigates white flash on slow startups
SDL.ShowWindow(mWindow);
for (int i < addTicks)
{
mUpdateCnt++;
Update();
}
Render();
}
else
{
mKeyboardState = SDL.GetKeyboardState(null);
addTicks = Math.Min(addTicks, 20); // Limit catchup
if (addTicks > 0)
{
for (int i < addTicks)
{
mUpdateCnt++;
Update();
}
Render();
}
else
{
Thread.Sleep(1);
}
Thread.Sleep(1);
}
curPhysTickCount = newPhysTickCount;
}
mCurPhysTickCount = newPhysTickCount;
}
}