Dimensions of eps file?

[BrianTheLibrarian]

Is it possible to find the dimensions of an eps file? I was able to get the dimensions if I converted the file to a bitmap, but when I try to run it using an eps file GDIplus just return a -1/-1 for the height /width of the file (same for svg files).  Was really hoping to find a solution using eps files, instead of converting them all to pngs to get the dimensions.

Was using the example provided by AutoBert here: 

 

*Just realized I posted this in the wrong forum too... (moved... Jos)

Edited October 19, 2018 by Jos

[careca]

Well i dont know much about this encapsulated files, but they say it can have a preview bitmap, and this is what i assume you want the dimensions of.

I have a possible solution, but it depends on your skill, so the idea i had is that you could read the byte where the dimensions info is on.

You basically get to identical eps files, and change the image size in one of them, then compare the two, if there's not much messing around with encryption or something, hopefully only a couple bytes will change, you then have to know what you're looking at, maybe convert the hex to decimal and see how it compares to the dimensions..

It's a mess tbh, i did a similar thing when i wanted to remove images from mp3's, after that i know exactly where the image would start and what bytes represented the end of the bmp's.

[mLipok]

What exactly you want to get ?

Width height depth/colors ?

[mLipok]

https://en.wikipedia.org/wiki/Encapsulated_PostScript

https://www.adobe.com/content/dam/acom/en/devnet/actionscript/articles/5001.DSC_Spec.pdf
https://www-cdf.fnal.gov/offline/PostScript/5002.PDF

Read:
Guidelines for Creating EPS Files
Required DSC Header Comments

You can also read this:
https://www.loc.gov/preservation/digital/formats/fdd/fdd000246.shtml

You must focus on:

Quote

• '%%BoundingBox: llx lly urx ury'
  The four arguments of the bounding box comment correspond to the lower-left (llx, lly) and upper-right (urx, ury) corners of the bounding box.

 

As far, as I remember EPS i just plain text document.
So you should read them and parse to find/get '%%BoundingBox: llx lly urx ury', and recalcutate this coordinates.

mLipok