VipsImage *image = vips_image_new_from_file("something.jpg", "autorotate", TRUE, NULL);
and it'll flip it upright for you and remove any EXIF orientation tag. It isn't the default since it has (obviously) a large memory and cpu cost.
For simple resize and crop it's much better to use the exif tag to adjust the resize and crop parameters (the vipsthumbnail command does this).
In my Go project I’m using the Golang library github.com/davidbyttow/govips/v2.
Images are loaded via `vips.NewImageFromFile()`, which internally calls `vips_image_new_from_file()`. However, `NewImageFromFile()` doesn't support any flags or options beyond the image path, so for JPEGs I manually call `AutoRotate()` before resizing, which wraps `vips_autorot()` — and that works well.
Thanks again!
`govips` was a pretty early binding and wasn't really done the libvips way. It doesn't expose all the operations or options, it's mostly done by hand, and there are a number of leaks and misfeatures.
It's been replaced by `vipsgen`:
https://github.com/cshum/vipsgen
Which is an automatically generated 100% binding. It should have the complete API, it should be very stable and leak-free, and it should be simple to maintain.
`autorot` is pretty expensive. You'll see much better performance if you flip x and y in your crop instead.
I wasn’t aware of `vipsgen`, but it looks great — full coverage and auto-generated bindings are exactly what I’ll be missing in `govips` if the project grows (I hope it will). I’ll definitely give it a try and see how it works.
Also, great tip on avoiding `autorot` by flipping crop coordinates — I hadn’t thought of that! Thanks again for your help!