Module: ImageProcessing::Vips::Processor::Utils

Defined in:
lib/image_processing/vips.rb

Class Method Summary collapse

Class Method Details

.select_valid_loader_options(source_path, options) ⇒ Object 



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# File 'lib/image_processing/vips.rb', line 122

def select_valid_loader_options(source_path, options)
  loader = ::Vips.vips_foreign_find_load(source_path)
  loader ? select_valid_options(loader, options) : options
end

.select_valid_options(operation_name, options) ⇒ Object 



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# File 'lib/image_processing/vips.rb', line 132

def select_valid_options(operation_name, options)
  operation = ::Vips::Operation.new(operation_name)

  operation_options = operation.get_construct_args
    .select { |name, flags| (flags & ::Vips::ARGUMENT_INPUT)    != 0 }
    .select { |name, flags| (flags & ::Vips::ARGUMENT_REQUIRED) == 0 }
    .map(&:first).map(&:to_sym)

  options.select { |name, value| operation_options.include?(name) }
end

.select_valid_saver_options(destination_path, options) ⇒ Object 



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# File 'lib/image_processing/vips.rb', line 127

def select_valid_saver_options(destination_path, options)
  saver = ::Vips.vips_foreign_find_save(destination_path)
  saver ? select_valid_options(saver, options) : options
end