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Today, I would like to share with you the relevant knowledge points about how to convert Canvas and Image into each other. The content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article. Let's take a look.

Copy the code

The code is as follows:

/ / convert image to canvas object

Function convertImageToCanvas (image) {

/ / create a canvas DOM element and set its width and height to be the same as the picture

Var canvas = document.createElement ("canvas")

Canvas.width = image.width

Canvas.height = image.height

/ / coordinates (0J0) indicate that the drawing starts here, which is equivalent to offset.

Canvas.getContext ("2d") .drawImage (image, 0,0)

Return canvas

}

Convert Canvas to Image

Assuming that the image has been processed on canvas, you can use the following methods to turn canvas into a picture Image object.

Copy the code

The code is as follows:

/ / extract image image from canvas

Function convertCanvasToImage (canvas) {

/ / New Image object, which can be understood as DOM

Var image = new Image ()

/ / canvas.toDataURL returns a string of Base64-encoded URL. Of course, the browser itself certainly supports it.

/ / specify the format PNG

Image.src = canvas.toDataURL ("image/png")

Return image

}

These are all the contents of the article "how to convert Canvas and Image". Thank you for reading! I believe you will gain a lot after reading this article. The editor will update different knowledge for you every day. If you want to learn more knowledge, please pay attention to the industry information channel.

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