Using the mask() method, you can create a mask for an image to specify the transparency in different parts of the image. To run this example locally, you will need two image files and a running local server.
Related Examples

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Words
Load fonts and draw text.

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Copy Image Data
Paint from an image file onto the canvas.

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Alpha Mask
Use one image to cut out a section of another image.

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Image Transparency
Make an image translucent on the canvas.

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Audio Player
Create a player for an audio file.

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Video Player
Create a player for a video file.

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Video on Canvas
Display and stylize a video on the canvas.

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Video Capture
Display a live video feed from a camera.