Sha256: 31a168e16de0edbe3aa716964683bc14752275d731e7d816e3c6c2178e8eba54
Contents?: true
Size: 986 Bytes
Versions: 15
Compression:
Stored size: 986 Bytes
Contents
module ChunkyPNG
# Image class
#
class Image < Canvas
METADATA_COMPRESSION_TRESHOLD = 300
attr_accessor :metadata
def initialize(width, height, initial = ChunkyPNG::Color::TRANSPARENT, metadata = {})
super(width, height, initial)
@metadata = metadata
@metadata_compression_treshhold = 300
end
def initialize_copy(other)
super(other)
@metdata = other.metadata
end
def metadata_chunks
metadata.map do |key, value|
if value.length >= METADATA_COMPRESSION_TRESHOLD
ChunkyPNG::Chunk::CompressedText.new(key, value)
else
ChunkyPNG::Chunk::Text.new(key, value)
end
end
end
def to_datastream(constraints = {})
ds = super(constraints)
ds.other_chunks += metadata_chunks
return ds
end
def self.from_datastream(ds)
image = super(ds)
image.metadata = ds.metadata
return image
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems