VC4 - Bitmap with transparent color

[c578437 (CJiwan)]

Hello

I’m trying to define a bitmap image with a transparent background colour.
Whatever bitmap file format I use, I can’t get the transparency right.
In the list of images, when I select the transparent colour for my image, it is displayed correctly.
But when I use this image on a page I get a grey background instead of the transparent background.

How can I obtain a correct transparent background?

Thank you

[alexander.hefner]

Hi,
and welcome to our Community!

It depends on your bitmap and the VC4 color-settings, please see here in the online help:

• if you use 32Bit visualization, the transparency is set by the alpha channel inside the bitmap
  • the bitmap type has to support alpha channel, with PNG alpha channel is possible
• if you use 8Bit visualisation, a palette color has to be set transparent

Best regards!

[xabier.zaldua]

Hi Christian!

In addition to the documentation provided by my colleague Alexander, which I recommend you consult, I add:

If you want a transparent image then this must be in PNG format. Check those screenshots of the configuration of the bitmap to obtain transparency.

Bitmap addition:

Bitmap in a page:

Hope this helps!

[c578437 (CJiwan)]

Thank you for your help.
I just missed the FillStyle attribute.
Christian