MrSid image size

Hello!

A little background, first. I have some large number of MrSid (sid files) and coresponding sdw file to tell us informations about where and how the image should be inserted. Such a file is presented below:

1.50000000000000 (X scale, pixel size in meters)

0.00000000000000 (affinity - Y-scale in X dir.)

0.00000000000000 (affinity - X-scale in Y dir.)

-1.50000000000000 (Y scale)

1934001.50000000000000 (X coordinate of the upper left pixel)

1187698.50000000000000 (Y coordinate of the upper left pixel)

What I would like to build is a "database" that may be searched by a lisp routine. The workflow is as follows:

Command: Src_img

Please choose a point:

are to be inserted>

Now, while everything is trivial in this list, I seem to have a hard time retrieving the size of exotic file types (as sid) as it appears in the Autocad environment (wold size, if you wish). For other files I use a trick found on web (VBA):

Set objFolder = obj_Shell.Namespace(FilePth)
Set objFile = objFolder.ParseName(FileName)
objFile.ExtendedProperty("Dimensions")

This gives us the size, in pixels. Having the scales presented before, computing coordinate of bottom right corner is, again, trivial.

The question, now:

Is there a way that you know about to get the size of a sid image (pixels or world size) using lisp or vba? I would go as far as to recursively search the folders for sid files, load them, retrieve the bottom-right corner, unload, step to next.

By the way, I have already downloaded the sdk from LizardTech and I'll see what I can get from there.

Any insight is greatly appreciated!

Have a great day!

Nick

PS I give you so much informations just to avoid reading things that I already know about. Sorry!

Just being here for some ObjectARX info and I have remembered that there was no answer to this. I did this (on Autocad Land Desktop 2007):

- an excel sheet (refered by EXCSheet in code) that holds full paths and names for all images on column 1

- FILEDIA set to 0

   With EXCSheet
       i = 4
       Do
RetryIns:
           ThisDrawing.SendCommand ("MAPIINSERT" & vbCrLf)
           ThisDrawing.SendCommand ("""" & .Cells(i, 1).Value & """" & vbCrLf)
           DoEvents
           Sleep 2000 ' maybe less
           ThisDrawing.SendCommand ("N" & vbCrLf) ' answer no

           ' this is he only image in the drawing (empty drawing)
           For Each a In ThisDrawing.ModelSpace
               If (TypeOf a Is AcadRasterImage) Then
                   Set the_img = a
                   insp = the_img.Origin ' insertion may fail to place image 
                   If (insp(0) = 0) And (insp(1) = 0) Then
                       the_img.Delete ' if so, we should retry
                       GoTo RetryIns
                   End If
                   
                   
                   Call the_img.GetBoundingBox(minp, maxp)
                   ' you may save bounding box here
                   scl_ty = ThisDrawing.GetVariable("INSUNITS")
                   Call ThisDrawing.SetVariable("INSUNITS", 0)                    
                   ' save here the_img.Rotation and the_img.ScaleFactor
                   Call ThisDrawing.SetVariable("INSUNITS", scl_ty)
                   ' maybe you need maximum/ minimum values... this is the place
                   the_img.Delete ' no need for this image any more
                   Exit For
               End If
           Next a
           
           i = i + 1
       Loop Until .Cells(i, 1).Value = ""
   End With
   

The code may look odd, as the parts that save values to excel sheet are stripped, but this is the general idea.

Best regards,

Nick