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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
premake/README-macosx.txt
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@@ -17,6 +17,7 @@ tests on that platform.
The Mac OS X projects currently have reliance on the following dependencies:
-CoreVideo.framework
-AudioToolbox.framework
-AudioUnit.framework
-Cocoa.framework

1
premake/projects/SDL2.lua
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@@ -213,6 +213,7 @@ SDL_project "SDL2"
}
SDL_links
{
"CoreVideo.framework",
"AudioToolbox.framework",
"AudioUnit.framework",
"Cocoa.framework",