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Add ability to set a rotation on SSIV #5
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- SSIV has an imageRotation field that can be changed, no EXIF parsing is done
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Why does this PR exist?
This library is quite handy, but it seems to lack the ability of dealing with rotated images. For example images having EXIF rotation data. In order to keeps things simple, the SSIV should have a rotation field and apply that to the tiles it's displaying.
How does the PR solve this?
This PR adds a new enum called
ImageRotation, it has fixed values of 90 degree increments.SubsamplingScaleImageViewhas been extended by aimageRotationfield of typeImageRotationand with a default value ofImageRotation.ROTATION_0. This value can be changed viaSubsamplingScaleImageView.setImageRotation(). In order for the rotation to applygetEffectiveSWidth()andgetEffectiveSHeight()have been added to account for the rotation when usingsWidthandsHeight.Further Reading
I based this PR on the original repo. I left out the EXIF parsing, it has to bee done externally, and once the rotation is determined, users can call
SubsamplingScaleImageView.setImageRotation().