mirror/JUCE
1
0
Fork 0
mirror of https://github.com/juce-framework/JUCE.git synced 2026-01-10 23:44:24 +00:00
Code Activity

Better handling of OSX openGL buffer-swapping in occluded windows

Browse source
This commit is contained in:
jules 2015-12-29 12:31:05 +00:00
parent 9ab9476fbc
commit 88b1fe0d97
1 changed files with 29 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

57
modules/juce_opengl/native/juce_OpenGL_osx.h
View file

@ -157,9 +157,37 @@ public:
void swapBuffers()
{
double now = Time::getMillisecondCounterHiRes();
[renderContext flushBuffer];
sleepIfRenderingTooFast();
if (minSwapTimeMs > 0)
{
// When our window is entirely occluded by other windows, flushBuffer
// fails to wait for the swap interval, so the render loop spins at full
// speed, burning CPU. This hack detects when things are going too fast
// and sleeps if necessary.
const double swapTime = Time::getMillisecondCounterHiRes() - now;
const int frameTime = (int) (now - lastSwapTime);
if (swapTime < 0.5 && frameTime < minSwapTimeMs - 3)
{
if (underrunCounter > 3)
{
Thread::sleep (2 * (minSwapTimeMs - frameTime));
now = Time::getMillisecondCounterHiRes();
}
else
++underrunCounter;
}
else
{
if (underrunCounter > 0)
--underrunCounter;
}
}
lastSwapTime = now;
}
void updateWindowPosition (const Rectangle<int>&) {}
@ -182,33 +210,6 @@ public:
return numFrames;
}
void sleepIfRenderingTooFast()
{
// When our window is entirely occluded by other windows, the system
// fails to correctly implement the swap interval time, so the render
// loop spins at full speed, burning CPU. This hack detects when things
// are going too fast and slows things down if necessary.
if (minSwapTimeMs > 0)
{
const double now = Time::getMillisecondCounterHiRes();
const int elapsed = (int) (now - lastSwapTime);
lastSwapTime = now;
if (isPositiveAndBelow (elapsed, minSwapTimeMs - 3))
{
if (underrunCounter > 3)
Thread::sleep (minSwapTimeMs - elapsed);
else
++underrunCounter;
}
else
{
underrunCounter = 0;
}
}
}
NSOpenGLContext* renderContext;
NSOpenGLView* view;
ReferenceCountedObjectPtr<ReferenceCountedObject> viewAttachment;