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FPS limiter (cl_fps)

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This commit is contained in:
yvt 2017-02-20 03:45:50 +09:00
parent cf1404c8ae
commit 298c1ecf0a
1 changed files with 14 additions and 0 deletions
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14
Sources/Gui/SDLRunner.cpp
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@ -52,6 +52,7 @@ DEFINE_SPADES_SETTING(s_audioDriver, "ysr");
#else
DEFINE_SPADES_SETTING(s_audioDriver, "openal");
#endif
DEFINE_SPADES_SETTING(cl_fps, "0");
namespace spades {
namespace gui {
@ -196,6 +197,19 @@ namespace spades {
DispatchQueue::GetThreadQueue()->ProcessQueue();
Uint32 dt = SDL_GetTicks() - ot;
if ((float)cl_fps != 0) {
// Limit the frame rate
Uint32 desiredDelay = static_cast<Uint32>(1000.0f / (float)cl_fps);
desiredDelay = std::max<Uint32>(std::min<Uint32>(desiredDelay, 200), 1);
if (dt < desiredDelay) {
SDL_Delay(desiredDelay - dt);
// Remeasure the time delta
dt = SDL_GetTicks() - ot;
}
}
ot += dt;
if ((int32_t)dt > 0)
view->RunFrame((float)dt / 1000.f);