JavaFX中填充速度最快的一个像素

Question

I use canvas in JavaFX library. I need to draw many pixels as fast as possible. I execute this :

canvas.getGraphicsContext2D().setFill(color);
canvas.getGraphicsContext2D().fillRect(x, y, 1, 1);

I suppose it is very slow. Can I use faster way? Maybe should I use another way/method to fill one pixel?

Answer 1

You can use the PixelWriter from an Image. As @jewelsea said use canvas.getGraphicsContext2D().getPixelWriter()

With the PixelWriter you can paint any Pixel you want:

pixelWriter.setColor(int x, int y,Color c)

I think this is the best way for only Paint pixels.

You can also waive the Canvas and use an ImageView with an WriteAbleImage in it.

In this case you can use writableImage.getPixelWriter() in the same way as the Canvas.

If this is still to slow you can Execute the pixelWriter.setColor(..) in a background Thread so the Application don't stop.

See also:

canvas performance

I hope this answer helps you.