Temporary InCanvas Graphics Image Colors

[3dimdev]

Hello all!

I was creating a video on the awesome new Temporary InCanvas Graphics API and had a question on the image colors.  As you can see, they are...off.  What are the rules the images, and colors, we can use in this feature?  Thanks!

[jeremy_tammik]

Since the thread above is long and many-sided, I do not really understand what you are trying to do or what your problem is from your short description. Please elaborate.

[Ramoon_Bandeira]

Hello Jeremy,
I`ve been simply trying to add a temporary image to my canvas using the TemporaryGraphicsManager, for that purpose i tryed to create an image with a size of 32x32 pixels, with a background of (0,128,128) rgb code.
As the documentation  states that this matches the best image settings for the image that should be added to the InCanvasImageControl that will be added to the TemporaryGraphicsManager.

The issue that i have is that the image appears as a transparent control on the revit view. And i would like to simply display its contents properly.

[Ramoon_Bandeira]

My mistake, after investigating a little bit and the information by the blog post of @julianwandzilak 

The solution was found. The image has to follow the following specifications: 

1 - Format must be BMP
2 - Bit depth must be 24
3 - Not mandatory but optimal results are attained for images with size 32x32 or 64x64
4 - Not mandatory but the background becomes transparent if it has an rgb value of 0,128,128

Here is the post of julian that solved the issue. Thank you Julian once again.

[ricaun]

Are you sure the issue is resolved?

When a Canvas Theme is used the color changes. (Happens in Revit 2024)

When 3D View is used the color changes. (Happens in Revit 2024 and 2023)

 

[Ramoon_Bandeira]

You are correct.

However, i was only aiming to make it work somehow. For that purpose, i achieved my goal.

Thanks.

[alisa_wachs_M3]

From my brief test, 32-bit bmp work, even supports transparency, but it has to be of format A8 R8 G8 B8.

The alpha channel works in reverse, where white represents full transparency, and black represents 100% opaque, you can even achieve semi-transparency. With this you can avoid relying on 0,128,128 for background.

As for color change - it occurs in my version of Revit 2024.3 upon adding/moving/removing of any element, change of visual style, change to CropBox, toggling Canvas Theme(I have made my own button to switch between Dark/Light mode and the change does not occur when using it) change does not occur if you simply pan/zoom/orbit around. I think it can be tied to anything that triggers DocumentChanged event. The exact degree by which the color changes depends on Dark/Light Mode, almost as if its utilizing two different hardcoded colors.