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Bug 1171156. More logging to test vsync timestamps. r=me

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This commit is contained in:
Mason Chang 2015-06-10 21:36:42 -07:00
parent a4d2212ed7
commit d4675e62ed
1 changed files with 7 additions and 1 deletions
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8
gfx/thebes/gfxPlatformMac.cpp
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@ -514,6 +514,7 @@ public:
}
mPreviousTimestamp = TimeStamp::Now();
mStartingVsync = true;
if (CVDisplayLinkStart(mDisplayLink) != kCVReturnSuccess) {
NS_WARNING("Could not activate the display link");
CVDisplayLinkRelease(mDisplayLink);
@ -547,6 +548,7 @@ public:
// Normalize the timestamps given to the VsyncDispatchers to the vsync
// that just occured, not the vsync that is upcoming.
TimeStamp mPreviousTimestamp;
bool mStartingVsync;
private:
// Manages the display link render thread
@ -575,12 +577,16 @@ static CVReturn VsyncCallback(CVDisplayLinkRef aDisplayLink,
mozilla::TimeStamp nextVsync = mozilla::TimeStamp::FromSystemTime(nextVsyncTimestamp);
mozilla::TimeStamp previousVsync = display->mPreviousTimestamp;
bool firstVsync = display->mStartingVsync;
display->mStartingVsync = false;
display->mPreviousTimestamp = nextVsync;
mozilla::TimeStamp now = TimeStamp::Now();
if (nextVsync <= previousVsync) {
TimeDuration next = nextVsync - now;
TimeDuration prev = now - previousVsync;
printf_stderr("Next from now: %f, prev from now: %f\n", next.ToMilliseconds(), prev.ToMilliseconds());
printf_stderr("Next from now: %f, prev from now: %f, first vsync %d\n",
next.ToMilliseconds(), prev.ToMilliseconds(), firstVsync);
MOZ_ASSERT(false, "Next vsync less than previous vsync\n");
}