mod_image_edit
See also
Non destructive edits of images.
This adds a Edit image button on the media panel in the admin.
Clicking that button opens an image editor where the following editing parameters can be set:
Rotation: in 90˚ increments, used to correct the orientation of an image
Crop: crop any or all sides of an image
Brightness: make an image more or less bright
Contrast: enhances or lowers the contrast
Roll: correct the rotation of an image (between 45˚ and -45˚)
Tilt: rotate an image in the Y direction, as if the viewer moves up or down
Pan: rotate an image in the X direction, as if the viewer moves left or right
Lossless flag: use PNG or GIF for the output image, used for clip art and logos
Crop center: mark a point that should stay in view when using automatic crops
All these operations are non-destructive. They are stored in the medium_edit_settings properties and applied whenever
an image is resized using the {% image %} tag.
The original image stays untouched. Downloads will download the original image.
If the original image should be used for a preview then pass the original argument to the {% image %} tag options.