3046d55d0e
SDL_CreateWindow() may call GetWindowDisplayIndex() to compute the position of a new window that the caller has requested to be placed on a certain display. Since we haven't fully constructed the window yet, our driverdata will be nil and we will fail to get the NSScreen (which is fine). However, we need to return an error (not 0, which is a valid display index) for SDL_GetWindowDisplayIndex() to know to figure out the display index itself. Fixes positioning new windows on secondary displays when using SDL_WINDOWPOS_CENTERED_DISPLAY() and SDL_WINDOWPOS_UNDEFINED_DISPLAY().
Simple DirectMedia Layer (SDL) Version 2.0
Simple DirectMedia Layer is a cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL and Direct3D. It is used by video playback software, emulators, and popular games including Valve's award winning catalog and many Humble Bundle games.
More extensive documentation is available in the docs directory, starting with README.md
Enjoy!
Sam Lantinga (slouken@libsdl.org)