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CGDisplayPixelsHigh(kCGDirectMainDisplay) involves an IPC call to the Window Server on each invocation. Cache the main display height in SDL_CocoaVideoData and update it only when display configuration changes, reducing overhead during high-frequency mouse event processing.
Simple DirectMedia Layer (SDL for short) is a cross-platform library designed to make it easy to write multi-media software, such as games and emulators.
You can find the latest release and additional information at: https://www.libsdl.org/
Installation instructions and a quick introduction is available in INSTALL.md
This library is distributed under the terms of the zlib license, available in LICENSE.txt.
Enjoy!
Sam Lantinga (slouken@libsdl.org)