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# OpenRS2 GL Natives
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## Known bugs
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### macOS performance
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OpenJDK's `nativeGetTopmostPlatformWindowUnderMouse` function is very slow on
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macOS. On lower-end hardware, such as a 2011 Mac Mini, the rendering loop
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completely freezes whenever the mouse moves. More information is available in
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the [JetBrains Runtime issuer tracker][macos-perf].
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The performance is significantly better if the [JetBrains Runtime][jbr] is used
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instead of OpenJDK.
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### macOS lighting quality
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The lighting quality is very poor on a Mac Mini with an integrated Intel HD
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Graphics 3000 card: some polygons are far too dark, and they tend to flicker
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between bright and dark as the camera angle changes, instead of transitioning
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smoothly.
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I'm not yet sure if this is a bug specific to macOS, the Intel HD Graphics 3000
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drivers or the card itself. I don't believe it is the reimplemented
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bindings - the same problem happens with the original jaggl bindings and build
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667 of the client. I also think it is unlikely to be the client, as the same
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client code works on Windows and Linux.
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## Copyright
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Copyright (c) 2019 OpenRS2 Authors
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OpenRS2 GL Natives is free software: you can redistribute it and/or modify it
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under the terms of version 3.0 of the GNU Lesser General Public License as
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published by the Free Software Foundation.
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OpenRS2 GL Natives is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
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more details.
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You should have received a copy of the GNU Lesser General Public License along
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with OpenRS2 GL Natives. If not, see <https://www.gnu.org/licenses/>.
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[macos-perf]: https://youtrack.jetbrains.com/issue/JBR-444
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[jbr]: https://confluence.jetbrains.com/display/JBR/JetBrains+Runtime
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