how to create gif using maui?

Question

how to create gif using my points?

List<Point[]> mygifs

mygifs is the x and y of the pixel which to set one color(#ffffff) and all other color will set to be #000000

and then set the gif to ImageSource

Point[] is one frame of gif

how to do it?

Answer 1

Hello,

Maui currently does not provide the relevant API for GIF synthesis. The demand for GIF synthesis cannot be met using dot matrix information. The smallest unit of GIF synthesis is a picture or a bitmap, because the GIF synthesis process does not redraw each pixel but involves compression and format conversion issues.

Therefore, you need to generate a GIF and display it in the Image control through the following three main steps.

1. Since the smallest unit of synthesized Gif is bitmap or image file, which also includes drawable on Android platform, you need to write your frame into bitmap or file first.
2. Implement Gif encoders on different native platforms. You could refer to the source code of AnimatedGifEncoder implemented by the Glide drawing library recommended by Android to implement your own Gif encoder. The encoder uses Bitmap as a unit and can efficiently compress frames into a gif file and save it to the target file.

example：

AnimatedGifEncoder e = new AnimatedGifEncoder(); 
e.start(outputFileName); 
e.setDelay(1000);   // 1 frame per sec
e.addFrame(image1); 
e.addFrame(image2);
e.addFrame(image3, 100, 100);    // set position of the frame
e.finish();

3. Since the gif encoder generates a local file, you can set the Source for the ImageView to display the gif image.

Best Regards,

Wenyan Zhang

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