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Contents
# encoding: utf-8
module DynamicImage
module Model
# = DynamicImage Model Transformations
#
module Transformations
# Rotates the image
def rotate(degrees = 90)
degrees = degrees.to_i % 360
return self if degrees.zero?
if (degrees % 90).nonzero?
raise DynamicImage::Errors::InvalidTransformation,
"angle must be a multiple of 90 degrees"
end
transform_image do |image|
image.rotate(degrees)
rotate_dimensions(real_size.x, real_size.y, degrees)
end
end
private
def rotate_dimensions(width, height, degrees)
(degrees / 90).times do
width, height = height, width
self.real_width = width
self.real_height = height
self.crop_gravity_x, self.crop_gravity_y = rotated_crop_gravity(width)
next unless cropped?
self.crop_start_x, self.crop_start_y,
self.crop_width, self.crop_height = rotated_crop(width)
end
end
def rotated_crop(new_width)
return nil unless cropped?
[
new_width - (crop_start_y + crop_height),
crop_start_x,
crop_height,
crop_width
]
end
def rotated_crop_gravity(new_width)
return nil unless crop_gravity?
[new_width - crop_gravity_y, crop_gravity_x]
end
def processed_image
DynamicImage::ProcessedImage.new(self, uncropped: true)
end
def transform_image
read_image_metadata if data_changed?
self.data = processed_image.normalized do |image|
yield(image) if block_given?
end
self
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems