Module: Qr4r
- Defined in:
- lib/qr4r.rb,
lib/qr4r/version.rb
Constant Summary collapse
- SIZE_RESTRICTIONS =
params we use
pixel_size - size of each dot, default = 3
params we pass to QRCode include :size and :level
size - the size of the qrcode (default 4) level - the error correction level, can be: * Level :l 7% of code can be restored * Level :m 15% of code can be restored * Level :q 25% of code can be restored * Level :h 30% of code can be restored
note: if size is not included and 4 appears to be too small for the included string, we’ll make it bigger
if you include size, we'll use it, which may lead to an error if the string is too long
Limitations are as follows:
size = 1, max string length = 7 size = 2, max string length = 14 size = 3, max string length = 24 size = 4, max string length = 34 size = 5, max string length = 44 size = 6, max string length = 58 size = 7, max string length = 64 size = 8, max string length = 84 size = 9, max string length = 98 size = 10, max string length = 119
[0, 7, 14, 24, 34, 44, 58, 64, 84, 98, 119]
- VERSION =
'0.4.0'
Class Method Summary collapse
Class Method Details
.encode(str, outfile, *rest) ⇒ Object
30 31 32 33 34 35 36 37 |
# File 'lib/qr4r.rb', line 30 def self.encode(str, outfile, *rest) opts = rest[0] if rest && rest.length > 0 opts ||= {} opts.merge!({:size => compute_size(str)}) unless opts[:size] opts.merge!({:pixel_size => 3}) unless opts[:pixel_size] qr, data = build_qr_code(str, opts) create_image(qr,data,outfile,opts) end |