从JavaFX Canvas获取像素数据的最佳方法？
[英]Best way to get pixel data from a JavaFX Canvas?
问题描述
Is it possible to get ARGB pixel data from a javafx.scene.canvas.Canvas ? 
是否可以从javafx.scene.canvas.Canvas获取ARGB像素数据？ I am aware that javafx.scene.image.Image provides a PixelReader for performing this operation but I would like to get this data directly from the canvas if possible. 我知道javafx.scene.image.Image提供了一个PixelReader来执行此操作，但我想尽可能直接从画布中获取这些数据。
1 个解决方案
解决方案1
7 2014-09-29 17:56:06
I believe I've found a solution. 我相信我找到了解决方案。 Since Canvas extends Node , it inherits the Node.snapshot() method which saves the current state of the canvas to a WritableImage . 由于Canvas扩展了Node ，它继承了Node.snapshot()方法，该方法将画布的当前状态保存到WritableImage 。 Since WritableImage extends Image , I can get the PixelReader from the WritableImage and read the pixel data. 由于WritableImage扩展了Image ，我可以从WritableImage获取PixelReader并读取像素数据。 This may not be the most optimal solution, but it works for my application. 这可能不是最佳解决方案，但它适用于我的应用程序。
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