Class: FormatParser::PSDParser

Inherits:
Object
  • Object
show all
Includes:
IOUtils
Defined in:
lib/parsers/psd_parser.rb

Constant Summary collapse

PSD_HEADER = 
[0x38, 0x42, 0x50, 0x53]
PSD_MIME_TYPE = 
'application/x-photoshop'

Constants included from IOUtils

IOUtils::INTEGER_DIRECTIVES

Instance Method Summary collapse

Methods included from IOUtils

#read_bytes, #read_fixed_point, #read_int, #safe_read, #safe_skip, #skip_bytes

Instance Method Details

#call(io) ⇒ Object 



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# File 'lib/parsers/psd_parser.rb', line 11

def call(io)
  io = FormatParser::IOConstraint.new(io)
  magic_bytes = safe_read(io, 4).unpack('C4')

  return unless magic_bytes == PSD_HEADER

  # We can be reasonably certain this is a PSD so we grab the height
  # and width bytes
  w, h = safe_read(io, 22).unpack('x10N2')
  FormatParser::Image.new(
    format: :psd,
    width_px: w,
    height_px: h,
    content_type: PSD_MIME_TYPE,
  )
end

#likely_match?(filename) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/parsers/psd_parser.rb', line 7

def likely_match?(filename)
  filename =~ /\.psd$/i # Maybe also PSB at some point
end