1package psd 2 3// ColorMode represents color mode that is used in psd file. 4type ColorMode int16 5 6// These color modes are defined in this document. 7// 8// http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_19840 9const ( 10 ColorModeBitmap = ColorMode(0) 11 ColorModeGrayscale = ColorMode(1) 12 ColorModeIndexed = ColorMode(2) 13 ColorModeRGB = ColorMode(3) 14 ColorModeCMYK = ColorMode(4) 15 ColorModeMultichannel = ColorMode(7) 16 ColorModeDuotone = ColorMode(8) 17 ColorModeLab = ColorMode(9) 18) 19 20// Channels returns the number of channels for the color mode. 21// The return value is not including alpha channel. 22func (c ColorMode) Channels() int { 23 switch c { 24 case ColorModeBitmap, 25 ColorModeGrayscale, 26 ColorModeIndexed: 27 return 1 28 case ColorModeRGB: 29 return 3 30 case ColorModeCMYK: 31 return 4 32 } 33 return -1 34} 35