Sha256: 3a747dafad6b76050a9575da13c3adf8afe314b22bd41c1cdcf99c9ff7d65c75
Contents?: true
Size: 1.97 KB
Versions: 70
Compression:
Stored size: 1.97 KB
Contents
module Term
module ANSIColor
class PPMReader
include Term::ANSIColor
def initialize(io, options = {})
@io = io
@options = options
@buffer = ''
end
def reset_io
begin
@io.rewind
rescue Errno::ESPIPE
end
parse_header
end
def each_row
reset_io
@height.times do
yield parse_row
end
end
def to_a
enum_for(:each_row).to_a
end
def to_s
result = ''
each_row do |row|
last_pixel = nil
for pixel in row
if pixel != last_pixel
color = Attribute.nearest_rgb_color(pixel, @options)
result << on_color(color)
last_pixel = pixel
end
result << ' '
end
result << reset << "\n"
end
result
end
private
def parse_row
row = []
@width.times do
row << parse_next_pixel
end
row
end
def parse_next_pixel
pixel = nil
case @type
when 3
@buffer.empty? and @buffer << next_line
@buffer.sub!(/(\d+)\s+(\d+)\s+(\d+)\s*/) do
pixel = [ $1.to_i, $2.to_i, $3.to_i ]
''
end
when 6
@buffer.size < 3 and @buffer << @io.read(8192)
pixel = @buffer.slice!(0, 3).unpack('C3')
end
pixel
end
def parse_header
(line = next_line) =~ /^P([36])$/ or raise "unknown type #{line.to_s.chomp.inspect}"
@type = $1.to_i
if next_line =~ /^(\d+)\s+(\d+)$/
@width, @height = $1.to_i, $2.to_i
else
raise "missing dimensions"
end
unless next_line =~ /^255$/
raise "only 255 max color images allowed"
end
end
def next_line
while line = @io.gets and line =~ /^#|^\s$/
end
line
end
end
end
end
Version data entries
70 entries across 54 versions & 9 rubygems