Get-Image-Size

[rcrsn51]

Here is a little tool named get-image-size that can extract the dimensions of a graphic file and assign them to variables. For example:

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read WIDTH HEIGHT <<< $(get-image-size photo.jpg)
echo width=$WIDTH height=$HEIGHT

The attached tarball contains 32/64bit versions. Rename the one you need and copy it to /usr/local/bin.

[musher0]

Thanks, rcrsn51.

One could alternatively use utilities from the netpbm suite:

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jpegtopnm X.jpg > X.pnm
pamfile X.pnm

Source.

But yours saves a step.

BFN.

[rcrsn51]

and assign them to variables

What's the point in demonstrating code that doesn't accomplish the objective?

If I was willing to use more code that extracts the dimensions from pamfile, I wouldn't have bothered developing this tool.

[musher0]

Of course.

[vovchik]

Dear rcrsn51,

Thanks very much. I once did something similar using the STB library, but your code is tiny. Can you please post your source, so that I can see how you do it? I see it handles xmp, png, gif, jpg, bmp and svg nicely. I would also like to compile it for my RPI3.

With kind regards,
vovchik

[rcrsn51]

Attached. It is based on mu's work here.

[vovchik]

Dear rcrsn51,

Thanks for the source. It looks familiar. I use those same fucntions from the gdk pixbuf loader in my picscale. In my STB-based getsize, there is no external dependency (gdk/gtk2), but the binary is significantly larger, so your little utility is probably better for most purposes and on most platforms.

It works nicely on RPI3, too. I have attached an armv7 (jessie) binary for the RPI3.

Thanks again.

With kind regards,
vovchik