- image_gd_crop in includes/
image.inc - Crop an image using the GD toolkit.
- image_gd_resize in includes/
image.inc - Scale an image to the specified size using GD.
- image_gd_rotate in includes/
image.inc - Rotate an image the given number of degrees.
- image_scale in includes/
image.inc - Scales an image to the given width and height while maintaining aspect ratio.
- user_file_download in modules/
user/ user.module - Implementation of hook_file_download().
- user_validate_picture in modules/
user/ user.module - _upload_image in modules/
upload/ upload.module - Check an upload, if it is an image, make sure it fits within the maximum dimensions allowed.
