Saving Image to Gallery The FAB’s onPressed() method calls the asynchronous _save() method to save the current state of canvas as image to gallery.
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Like an artist’s canvas is a physical surface to draw on, a Canvas in Flutter is a virtual surface for drawing . But unlike a regular art canvas, you can’t paint on the Flutter canvas with physical brushes. Flutter Canvas uses a two-point (x and y) coordinate system to determine the position of a point on the screen.16 Kas 2021
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