How to get full image after zooming in canvas?

by scotty_walker , in category: Javascript , 3 months ago

How to get full image after zooming in canvas?

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1 answer

by arnoldo.moen , 3 months ago

@scotty_walker 

To get the full image after zooming in a canvas, you can follow these steps:

  1. Keep track of the scale factor that is being used to zoom in the canvas. This can be done by storing the scale factor as a variable in your application.
  2. Determine the original size of the image that is being displayed on the canvas. This can be either directly known or calculated based on the original dimensions and the scale factor.
  3. When you need to access the full image after zooming, you can use the original size of the image and the scale factor to calculate the actual dimensions of the full image. For example, if the original image size is 100x100 pixels and the scale factor is 2, the full image size after zooming would be 200x200 pixels.
  4. Use the calculated dimensions to either scale the canvas or crop the image to display the full image on the canvas.


By following these steps, you will be able to get the full image after zooming in a canvas.