Sha256: 4240e89831d92cc773d0d4d0056388ce1542e5889149b6009efbb592f33cf124
Contents?: true
Size: 1.88 KB
Versions: 15
Compression:
Stored size: 1.88 KB
Contents
require "webp/options"
require "webp/c"
module WebP
class << self
def decoder_version
pointer = FFI::MemoryPointer.new(:char, 10)
C.decoder_version(pointer)
pointer.null? ? nil : pointer.read_string()
end
def encoder_version
pointer = FFI::MemoryPointer.new(:char, 10)
C.encoder_version(pointer)
pointer.null? ? nil : pointer.read_string()
end
# get webp image size
def webp_size(data)
return nil if data.nil?
pointers = get_pointers_for_webp_size(data)
if 0 == C.webp_get_info(pointers[:data], pointers[:data_size], pointers[:width], pointers[:height])
[(pointers[:width].null? ? nil : pointers[:width].read_int), (pointers[:height].null? ? nil : pointers[:height].read_int)]
else
raise InvalidImageFormatError, "invalid WebP image data"
end
end
# encode
def encode(input_file, output_file, options = {})
unless 0 == (encode_res = C.webp_encode(input_file, output_file, init_options_object(options).encode_pointer))
raise EncoderError, ENCODER_ERRORS[encode_res - 1]
end
true
end
# decode
def decode(input_file, output_file, options = {})
unless 0 == (decode_res = C.webp_decode(input_file, output_file, init_options_object(options).decode_pointer))
raise DecoderError, DECODER_ERRORS[decode_res - 1]
end
true
end
private
def get_pointers_for_webp_size(data)
pointers = Hash.new
pointers[:data_size] = data.respond_to?(:bytesize) ? data.bytesize : data.size
pointers[:width], pointers[:height] = FFI::MemoryPointer.new(:int, 2), FFI::MemoryPointer.new(:int, 2)
pointers[:data] = FFI::MemoryPointer.new(:char, pointers[:data_size]).put_bytes(0, data)
pointers
end
def init_options_object(options)
Options.new options
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems