Hi,
I need to rotate the contents of several image files of various types
and then replace the original files. I want to preserve the type of
file and as much of the data as possible (for example, multiple
representations). This is data processing only; I don't need to
display the images while processing them.
I tried looping through the paths to create a CGImageSourceRef for
each file, then for each image in the file, create a CGImageRef and
use that to make a transform that rotates around the center of the
image, but I wasn't sure where to go after that. It looks like I'd
need to do something like concatenate that rotation transform to a
context's transform, draw the original image there, create a new image
with CGBitmapContextCreateImage, add that to my
CGImageDestinationSourceRef and repeat for every image in the image
source. But that seemed like enough steps that I thought there was
probably a better approach.
What's a good way to do this?
Thanks for any suggestions.
- d
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