[SOLVED] Screenshot with transparency

[d.vavilov]

hello!

is there any way to take screenshot with transparency (no background) in runtime?

looks like "no" but the tracker can do it from editor

[silent]

d.vavilov

You need just to grab and RGBA image (Environment rendering should be enabled). In A channel there would be an alpha that will mask the background. Please check the attached RGBA picture - it has been grabbed with built-in Video Grabber tool from inside the Editor.

Thanks!

frame_5.zip

[dmitry.vavilov]

But how to do it in runtime?

var ima = new Image();
Render.GetScreenshot(ima);
ima.Save(AppDomain.CurrentDomain.BaseDirectory+"test.tga");

this code brings screenshot with background (haze), but same scene with Tracker and Video grabber gives screenshot without it

[karpych11]

Hello,

I made a component with an example of creating screenshots. Is this solution suitable for your task?

Screenshot.cs

[dmitry.vavilov]

On 9/28/2021 at 11:08 AM, karpych11 said:

Hello,

I made a component with an example of creating screenshots. Is this solution suitable for your task?

Screenshot.cs 1.73 kB · 10 downloads

thank you. handy tool, but still no transparent background in runtime mode :(

maybe it works in modern SDK, i'm on version 2.12

[silent]

Is it possible to get a small reproduction project that we can run and test?

If you can emulate your web camera image rendering - it would be just great. Maybe there is something different happens when additional texture is being rendered on top.

Thanks!

 

[dmitry.vavilov]

tested in standard "new project" from SDK 2.11.

 

 

 

AppWorldLogic.cs

with karpych11's code in AppWorldLogic

[silent]

I've tried to fix this two shady lines of code:

if (image.Format == Image.FORMAT_RGBA8)
	image.ConvertToFormat(Image.FORMAT_RGB8); // needs to be RGBA8 to keep the alpha instead of sky color

Also, RGBA16F can't be saved into PNG, use DDS / EXR formats instead.

After replacing RGB8 with RGBA8, I have correct results with transparent sky (check attached image).

Thanks!

[dmitry.vavilov]

got it. thank You!