davidmz/apng-canvas

APNG implementation on canvas.

apng-canvas's Issues

i have some problem!

Hello,when i write this to do my work. I find it doesn't work.
JS and apng is successful introduction,but it not work.
console reminds me error:"http://www.xxxx.com/undefined"!
so,what happend?

Question: Is this approach able to apply with animated gif / animated SVG?

I'm original questioner of this stackoverflow article.
https://stackoverflow.com/questions/67660696/can-the-latest-openlayers-render-the-animated-marker-using-gif-apng-webp

The point is, old style web map engine uses div+img elements for the markers on the map, so animated XXX type image can be used for animated marker.
But the modern web map engine uses canvas or even webgl, so it became tough to realize animated marker.

I want to make it easy by creating some libraries for updating canvas context on each frame.
But I have less knowledge about such other formats like animated gif / SVG, so I'm not sure similar approach with your library can be used for such formats.
Do you give me advise if it is worse to customize this library for them or not, if you know?

If it is worse, I'll try to customize...

Method to stop animation

I would like to be able to stop an animation. If simply removing the canvas from the DOM, the animation is still running in the background, calculating the frames. Is there a way to stop a specific image animation, or all animations completely?

Garbled character

when we use apng-canvas v2.1.0, it appears Garbled character in pages ( happens on Android System v6.0 )

Animation disappears

When the apng of an acyclic animation is used, there is no problem with the first loading, and then the animation with < img > appended disappears
`function addImg() {
var imgD = new Image();
imgD.src = ""
document.body.appendChild(imgD)

}

setInterval(function() {
addImg();
}, 3000)
`

Can you provide the event emit such as finished or which frame is playing?

cannot install using yarn

when I try to install with yarn:

yarn install apng-canvas I get an error:
error Received malformed response from registry for "apng-canvas". The registry may be down.

I can successfully install apng-js like this with yarn install apng-js

Not working on android webview

Hi,

I use this library on android webview,

but It's not working and no error message,

any idea?

The build version file apng-canvas.min.js's pageProtocol always being false

I see you have make a commit to fix the problem "pageProtocol always being false" via 1ae5740

But the build version file, "apng-canvas.min.js" was still have the problem.

Pls build a new work in process version :)

How about making an encode lib?

Great works! I learned a lot from this lib. Right now, I am trying to make apng from a png list. However, I encountered some problems. I would like to know your implement, could you enlighten me?

Not working on local machine with file://

I'm having an issue running this on my local machine from files (getting CORS issues). You wrote that this is a known issue but I need it to work nonetheless. Any idea how to get this work on my local machine with Chrome WITHOUT running a server just to add the Access-Control-Allow-Origin header? Is there a reason why the files are fetched using XHR instead of simply getting them from a path?

Great work!

How hard would it be to encode APNGs in the browser? I'm doing it now with animated GIFs (http://meemoo.org/iframework/#/example/cam2gif thanks to https://github.com/antimatter15/jsgif), but it would be nice to have 8-bit alpha.

Способ получения Binary

1. Бинарный код в Chrome, Firefox, Opera можно получить так:

var xhr = new XMLHttpRequest();
xhr.open('GET', img.src, true);
xhr.overrideMimeType('text/plain; charset=x-user-defined'); //binary XHR FTW? Probably XHR2 has binary xhr powers
xhr.onload = function(){
var binary = xhr.responseText.split('').map(function(e){return String.fromCharCode(e.charCodeAt(0) & 0xff)}).join('');

}
xhr.send(null);

1. Я разработал http://html5tester.h19.ru/bin2/dev_tools_v2.js
   Инструменты для работы с бинарным кодом и PNG.
2. Про IE сам думай!

Create Microsoft Edge extension

Can you create an extension to give Edge ability to play APNG?

Images only animate first time

Works great on desktop but on Android Chrome the images only animate once, if you refresh they are static images.
Any ideas?