| image_crop | includes/image.inc | Crop an image to the rectangle specified by the given rectangle. |
| image_resize | includes/image.inc | Resize an image to the given dimensions (ignoring aspect ratio). |
| image_rotate | includes/image.inc | Rotate an image by the given number of degrees. |
| image_scale | includes/image.inc | Scales an image to the given width and height while maintaining aspect
ratio. |
| image_scale_and_crop | includes/image.inc | Scales an image to the exact width and height given. Achieves the
target aspect ratio by cropping the original image equally on both
sides, or equally on the top and bottom. This function is, for
example, useful to create uniform sized avatars from... |
| image_toolkit_invoke | includes/image.inc | Invokes the given method using the currently selected toolkit. |
| system_image_toolkit_settings | modules/system/system.admin.inc | Form builder; Configure site image toolkit usage.
See alsosystem_settings_form() |