How to draw svg to bitmaps?

Dunhou

Hey community,

I want to display capsule assets with icon with maxon.AssetUtilitiesInterface.GetAssetIcon , but some of the icon is in svg format, can we draw this into a bitmap like command palate did?

import c4d
import maxon

doc: c4d.documents.BaseDocument  # The currently active document.
op: c4d.BaseObject | None  # The primary selected object in `doc`. Can be `None`.

def main() -> None:
    """Called by Cinema 4D when the script is being executed.
    """
    repo = maxon.AssetInterface.GetUserPrefsRepository()
    uid = maxon.Id("file_bc73b379cb5e509e")
    # this is the ivy capsule id, it has a svg icon
    # uid = maxon.Id("com.rocketlasso.neutron.asset.generator.ivy")

    asset_description = repo.FindLatestAsset(
        maxon.AssetTypes.File(), uid, maxon.Id(), maxon.ASSET_FIND_MODE.LATEST)
    preview_url = maxon.AssetUtilitiesInterface.GetAssetIcon(asset_description)
    bmp = c4d.bitmaps.BaseBitmap()
    result, _ = bmp.InitWith(preview_url)
    if result != c4d.IMAGERESULT_OK:
        return None
    c4d.bitmaps.ShowBitmap(bmp)

if __name__ == '__main__':
    main()

Cheers~
DunHou

ferdinand

Hello @Dunhou,

Thank you for reaching out to us. I am afraid that this is not possible within our Python API at the moment.

Internally, BaseBitmap is what we call an adapter. It is a hollowed out type from older days, which only continues to exist so that we do not have to rewrite large parts of our code base. A BaseBitmap wraps internally an ImageInterface, where also the sub-type VectorImageInterface exists. Unfortunately, neither of these Maxon API interfaces are exposed to Python, and it is also somewhat unlikely that they will be in the future. The reason why your code bmp.InitWith(preview_url) does not work, is because the backend function ::InitFromFile which implements BaseBitmap::InitWith operates based on bitmap loaders and VectorImageInterface is not a bitmap loader, because it was implemented long after the 'classic' Cinema API.

When I have some time, I will try to monkey patch a BaseBitmap.FromVectorImage method into the Python API. For now, you would have to use an external library such as Pillow.

Cheers,
Ferdinand