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Implement framerate limit setting

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The framerate limit can be used to reduce strain on the CPU and GPU, in a way similar to VSync, but without the increased input lag that is typical with VSync.
This commit is contained in:
scrawl 2015-09-07 16:05:51 +02:00
parent 96e3933ee9
commit 481f23d955
2 changed files with 15 additions and 0 deletions
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12
apps/openmw/engine.cpp
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@ -676,6 +676,7 @@ void OMW::Engine::go()
// Start the main rendering loop // Start the main rendering loop
osg::Timer frameTimer; osg::Timer frameTimer;
double simulationTime = 0.0; double simulationTime = 0.0;
float framerateLimit = Settings::Manager::getFloat("framerate limit", "Video");
while (!mViewer->done() && !mEnvironment.getStateManager()->hasQuitRequest()) while (!mViewer->done() && !mEnvironment.getStateManager()->hasQuitRequest())
{ {
double dt = frameTimer.time_s(); double dt = frameTimer.time_s();
@ -693,6 +694,7 @@ void OMW::Engine::go()
if (!mEnvironment.getInputManager()->isWindowVisible()) if (!mEnvironment.getInputManager()->isWindowVisible())
{ {
OpenThreads::Thread::microSleep(5000); OpenThreads::Thread::microSleep(5000);
continue;
} }
else else
{ {
@ -700,6 +702,16 @@ void OMW::Engine::go()
mViewer->updateTraversal(); mViewer->updateTraversal();
mViewer->renderingTraversals(); mViewer->renderingTraversals();
} }
if (framerateLimit > 0.f)
{
double thisFrameTime = frameTimer.time_s();
double minFrameTime = 1.0 / framerateLimit;
if (thisFrameTime < minFrameTime)
{
OpenThreads::Thread::microSleep(1000*1000*(minFrameTime-thisFrameTime));
}
}
} }
// Save user settings // Save user settings

3
files/settings-default.cfg
View file

@ -20,6 +20,9 @@ vsync = false
gamma = 1.00 gamma = 1.00
contrast = 1.00 contrast = 1.00
# Maximum framerate in frames per second, 0 = unlimited
framerate limit = 0
[GUI] [GUI]
scaling factor = 1.0 scaling factor = 1.0