topic Re: Export all Blocks as PNGs with transparent background in Visual LISP, AutoLISP and General Customization Forum

Export all Blocks as PNGs with transparent background

bradley.wherry — Thu, 10 Apr 2025 14:00:39 GMT

I have a series of blocks that I have created (approx 50) I would like to export them all separately as PNG files so I can use them in other software.

Is there a way that I can automate this? or do it acutely and efficiently?

I have attached the file I have created

Re: Export all Blocks as PNGs with transparent background

baksconstructor — Thu, 10 Apr 2025 14:42:32 GMT

Like this.

Re: Export all Blocks as PNGs with transparent background

Sea-Haven — Fri, 11 Apr 2025 00:13:41 GMT

Easy make a layout say images. Get all blocks currently in model space. insert the block into your layout, zoom

extents, then plot, erase last and keep going till all blocks are done. Erase image layout.

Hopefully later today.

Re: Export all Blocks as PNGs with transparent background

daniel_cadext — Fri, 11 Apr 2025 00:44:26 GMT

You can do this with python.

1, you have to compute the aspect ratio, I just used 380x380 since yours is close to that.

2, Transparency is a bit of a hack, set a background color and mask it out

from pyrx import Rx, Ge, Gi, Gs, Db, Ap, Ed, Ax import traceback import wx #wxPython @Ap.Command() def doit(): try: db = Db.curDb() bt = Db.BlockTable(db.blockTableId()) for name, id in bt.toDict().items(): btr = Db.BlockTableRecord(id) if btr.isLayout(): continue if btr.isAnonymous(): continue if name.startswith('A$'): continue #id imageX imageY zoom background color img: wx.Image = Gs.Core.getBlockImage(id, 380, 380, 1.0, [0, 0, 0]) img.SetMaskColour(0,0,0) img.SetMask(True) img.SaveFile("E:\\temp\\Icons\\{}.png".format(name), wx.BITMAP_TYPE_PNG) except Exception as err: traceback.print_exception(err)

Re: Export all Blocks as PNGs with transparent background

Sea-Haven — Fri, 11 Apr 2025 00:53:54 GMT

Good idea @daniel_cadext, one question to @bradley.wherry do you want all blocks in block table or just those that are used in the current dwg.

Re: Export all Blocks as PNGs with transparent background

bradley.wherry — Fri, 11 Apr 2025 08:27:19 GMT

Thanks @daniel_cadext thats a great solution. I was attempting something similar, but my coding needs some work.