1 function alpha(value, color) { 2 return value << 24 | (color & 0x00FFFFFF); 3 } 4 5 function argb(a, r, g, b) { 6 return a << 24 | r << 16 | g << 8 | b; 7 } 8 9 function assert(condition) { 10 if (!condition) debugger; 11 } 12 13 function isAlpha(code) { 14 return (code > 64 && code < 91) // upper alpha (A-Z) 15 || (code > 96 && code < 123); // lower alpha (a-z) 16 } 17 18 function isArray(a) { 19 return a.constructor === Array; 20 } 21 22 function rgb(r, g, b) { 23 return 0xFF << 24 | r << 16 | g << 8 | b; 24 } 25
