topic Re: ImageElement api cannot display transparent png in mapview in ArcGIS JavaScript Maps SDK Questions

ImageElement api cannot display transparent png in mapview

Lzy — Thu, 28 Jul 2022 03:40:23 GMT

Hello

I found a problem when using the ImageElement api, using MediaLayer ImageElement in the mapview api to add a transparent png image to the map, the white color does not achieve the transparent effect.

It is found that the problem occurs in the bit depth. The bit depth of the png image is 8, and the bit depth of the png image is 32, which cannot be displayed normally.

Hope it will be resolved in the next version.

Re: ImageElement api cannot display transparent png in mapview

UndralBatsukh — Thu, 28 Jul 2022 18:06:27 GMT

Hi there,

I tested the MediaLayer with a 8 bit png with a transparent background and was not able to reproduce the issue you described. Here is the image I used: https://i.stack.imgur.com/RPEQQ.png

The one with red background is added as img on a div with a red background. The one on the map is added to the MediaLayer. The transparency is working expected.

If you see issue can you please provide a reproducible case?

Thanks

Re: ImageElement api cannot display transparent png in mapview

Lzy — Tue, 02 Aug 2022 08:04:55 GMT

I'm sorry. I think I didn't express myself clearly. 32-bit PNG images are opaque .The 8-bit PNG image is normal

Re: ImageElement api cannot display transparent png in mapview

UndralBatsukh — Tue, 02 Aug 2022 17:55:43 GMT

Hi there,

Ah should have realized that. I am able to reproduce the issue. We are tracking this issue and will update you as soon as it is fixed. Thanks for bringing this issue to our attention.

-Undral

Re: ImageElement api cannot display transparent png in mapview

Lzy — Wed, 03 Aug 2022 08:24:20 GMT

Okay, thanks

Re: ImageElement api cannot display transparent png in mapview

UndralBatsukh — Mon, 08 Aug 2022 18:43:34 GMT

Hi there,

This issue will be fixed at version 4.25 which will be released in October. In meantime, you can test the fix by pointing your app to our `next` version: https://github.com/Esri/feedback-js-api-next

-Undral

Re: ImageElement api cannot display transparent png in mapview

Lzy — Thu, 11 Aug 2022 03:17:57 GMT

Thanks!

Re: ImageElement api cannot display transparent png in mapview

Lzy — Sat, 14 Jan 2023 09:37:03 GMT

Hello, I have seen the optimization of the media layer in 4.25, and I would like to see if the resolution of the media layer can be increased later, for example, 30000 * 30000