ray007 / apng-as.js

apng assembler

apng-as.js

A small, fast and advanced APNG assembler. It started as a fork of UPNG.js, but can now only assemble multiple single-image png frames to one apng image.

I'm using it to diplay animations in the browser, it's the opposite of apng-canvas.

Encoder

UPNG.js supports APNG and the interface expects "frames". Regular PNG is just a single-frame animation (single-item array).

Other than the original UPNG.js, the input data consists of png image data instead of rgba data.

UPNG.assemble(imgs, dels, [w, h])

• imgs: array of frames. A frame is an ArrayBuffer containing the pixel data (RGBA, 8 bits per channel)
• dels: array of delays for each frame (only when 2 or more frames)
• w, h : width and height of the image, if not given taken from first frame
• returns an ArrayBuffer with binary data of a APNG file