github.com/hajimehoshi/ebiten (go): Package ebiten provides graphics and input API to develop a 2D game.  You can start the game by calling the function RunGame.  In the API document, 'the main thread' means the goroutine in init(), main() and their callees without 'go' statement. It is assured that 'the main thread' runs on the OS main thread. There are some Ebiten functions that must be called on the main thread under some conditions (typically, before ebiten.RunGame is called).  `EBITEN_SCREENSHOT_KEY` environment variable specifies the key to take a screenshot. For example, if you run your game with `EBITEN_SCREENSHOT_KEY=q`, you can take a game screen's screenshot by pressing Q key. This works only on desktops.  `EBITEN_INTERNAL_IMAGES_KEY` environment variable specifies the key to dump all the internal images. This is valid only when the build tag 'ebitendebug' is specified. This works only on desktops.  `ebitendebug` outputs a log of graphics commands. This is useful to know what happens in Ebiten. In general, the number of graphics commands affects the performance of your game.  `ebitengl` forces to use OpenGL in any environments.
Keywords: ebiten|ebitengine|game|game-2d|game-development|game-engine|game-engine-2d|game-library|gamedev|go|golang|golang-library