util.coffeelib/psd/ | |
|---|---|
module.exports =
pad2: (i) -> (i + 1) & ~0x01
pad4: (i) -> ((i + 4) & ~0x03) - 1
getUnicodeCharacter: (cp) ->
if cp >= 0 and cp <= 0xD7FF or cp >= 0xE000 and cp <= 0xFFFF
return String.fromCharCode(cp)
else if cp >= 0x10000 and cp <= 0x10FFFF | |
we substract 0x10000 from cp to get a 20-bits number in the range 0..0xFFFF | cp -= 0x10000 |
we add 0xD800 to the number formed by the first 10 bits to give the first byte | first = ((0xffc00 & cp) >> 10) + 0xD800 |
we add 0xDC00 to the number formed by the low 10 bits to give the second byte | second = (0x3ff & cp) + 0xDC00
String.fromCharCode(first) + String.fromCharCode(second)
clamp: (num, min, max) ->
Math.min(Math.max(num, min), max)
|