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Fixed bug 2696 - Mac: fix display mode refresh rate calculation

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Alex Szpakowski

SDL's Cocoa backend uses the CGDisplayMode API to get refresh rate information about a display mode, but CGDisplayModeGetRefreshRate will return 0 on most non-CRT monitors.

The only way I know of to get correct refresh rate information in OS X is via the CoreVideo DisplayLink API.
I have attached a patch which tries to use the CVDisplayLinkGetNominalOutputVideoRefreshPeriod function if CGDisplayModeGetRefreshRate fails, which fixes display mode refresh rate information on the monitors I tested.

The CVDisplayLink API requires linking with the CoreVideo framework, and the patch updates the various build files to do so.
This commit is contained in:
Sam Lantinga 2014-08-23 10:47:50 -07:00
parent a79ed6cea2
commit 059579e48f
8 changed files with 144 additions and 5 deletions
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1
configure vendored
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@ -23338,6 +23338,7 @@ $as_echo "#define SDL_TIMER_UNIX 1" >>confdefs.h
# The Mac OS X platform requires special setup.
EXTRA_CFLAGS="$EXTRA_CFLAGS -fpascal-strings"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lobjc"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,CoreVideo"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,Cocoa"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,Carbon"
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -Wl,-framework,IOKit"