Class: Miso::Processor
- Inherits:
-
Object
- Object
- Miso::Processor
- Defined in:
- lib/miso/processor.rb,
lib/miso/processor/core_image.rb,
lib/miso/processor/image_magick.rb,
lib/miso/processor/graphics_magick.rb
Direct Known Subclasses
Defined Under Namespace
Classes: CoreImage, GraphicsMagick, ImageMagick
Class Attribute Summary collapse
-
.processor_class ⇒ Object
The default processor class.
-
.processor_classes ⇒ Object
The list of processor classes.
Instance Attribute Summary collapse
-
#input_file ⇒ Object
readonly
Returns the value of attribute input_file.
Class Method Summary collapse
Instance Method Summary collapse
- #crop(width, height) ⇒ Object
- #dimensions ⇒ Object
- #fit(width, height) ⇒ Object
- #height ⇒ Object
-
#initialize(input_file) ⇒ Processor
constructor
A new instance of Processor.
- #width ⇒ Object
- #write(output_file) ⇒ Object
Constructor Details
#initialize(input_file) ⇒ Processor
Returns a new instance of Processor.
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# File 'lib/miso/processor.rb', line 40 def initialize(input_file) @input_file = File.(input_file) raise Errno::ENOENT, @input_file unless File.exist?(@input_file) end |
Class Attribute Details
.processor_class ⇒ Object
The default processor class.
Returns either the assigned processor, or otherwise finds the first processor, that is available on the machine, from the processor_classes array.
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# File 'lib/miso/processor.rb', line 19 def processor_class @processor_class ||= processor_classes.find { |c| c.available? } raise "None of the Miso::Processor classes are available." unless @processor_class @processor_class end |
.processor_classes ⇒ Object
The list of processor classes.
When no explicit processor_class is set this list is iterated, from first to last, and the first available processor on the machine is used.
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# File 'lib/miso/processor.rb', line 29 def processor_classes @processor_classes ||= [CoreImage, GraphicsMagick, ImageMagick] end |
Instance Attribute Details
#input_file ⇒ Object (readonly)
Returns the value of attribute input_file.
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# File 'lib/miso/processor.rb', line 38 def input_file @input_file end |
Class Method Details
.available? ⇒ Boolean
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# File 'lib/miso/processor.rb', line 33 def available? raise NotImplementedError, "The class `#{name}' does not implement ::available?." end |
Instance Method Details
#crop(width, height) ⇒ Object
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# File 'lib/miso/processor.rb', line 45 def crop(width, height) raise NotImplementedError, "The class `#{self.class.name}' does not implement #crop." end |
#dimensions ⇒ Object
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# File 'lib/miso/processor.rb', line 53 def dimensions raise NotImplementedError, "The class `#{self.class.name}' does not implement #dimensions." end |
#fit(width, height) ⇒ Object
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# File 'lib/miso/processor.rb', line 49 def fit(width, height) raise NotImplementedError, "The class `#{self.class.name}' does not implement #fit." end |
#height ⇒ Object
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# File 'lib/miso/processor.rb', line 65 def height dimensions.last end |
#width ⇒ Object
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# File 'lib/miso/processor.rb', line 61 def width dimensions.first end |
#write(output_file) ⇒ Object
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# File 'lib/miso/processor.rb', line 57 def write(output_file) raise NotImplementedError, "The class `#{self.class.name}' does not implement #write." end |