Identifies a color space ID. This ID is a bit field which can combine multiple values from enumIGColorSpaceIDs. It can be made up of one, two, or three components. It must describe the color space (RGB, CMYK, grayscale, etc). It may also indicate that a type of alpha channel is present (alpha, pre-multiplied alpha) and/or the presence of one or more extra channels. For example:

IG_COLOR_SPACE_ID_RGB - RGB with no alpha or extra channels.

IG_COLOR_SPACE_ID_Gy Or IG_COLOR_SPACE_ID_A - grayscale with an alpha channel.

IG_COLOR_SPACE_ID_RGB Or IG_COLOR_SPACE_ID_P Or IG_COLOR_SPACE_ID_Ex - RGB with a pre-multiplied alpha channel and one or more extra channels.

Values:

IG_COLOR_SPACE_ID_None	No regular (color) channels, can be combined with alpha and extra values.
IG_COLOR_SPACE_ID_RGB	RGB.
IG_COLOR_SPACE_ID_Gy	Grayscale (intensity).
IG_COLOR_SPACE_ID_I	Indexed RGB.
IG_COLOR_SPACE_ID_IHS	IHS.
IG_COLOR_SPACE_ID_HLS	HLS.
IG_COLOR_SPACE_ID_LAB	LAB.
IG_COLOR_SPACE_ID_YIQ	YIQ.
IG_COLOR_SPACE_ID_CMY	CMY.
IG_COLOR_SPACE_ID_CMYK	CMYK.
IG_COLOR_SPACE_ID_YCbCr	YCbCr.
IG_COLOR_SPACE_ID_YUV	YUV.
IG_COLOR_SPACE_ID_XYZ	For internal use only. CIE XYZ.
IG_COLOR_SPACE_ID_LAST	Equal to last color space (for color channels) enum value.
IG_COLOR_SPACE_ID_ColorMask	Bit mask used to access color space (for color channels) only.
IG_COLOR_SPACE_ID_A	Indicates presence of an alpha channel.
IG_COLOR_SPACE_ID_P	Indicates presence of a pre-multiplied alpha channel.
IG_COLOR_SPACE_ID_Ex	Indicates presence of one or more extra channels.
IG_COLOR_SPACE_ID_RGBA	RGB with alpha channel.
IG_COLOR_SPACE_ID_RGBPA	RGB with pre-multiplied alpha channel.
IG_COLOR_SPACE_ID_GyA	Intensity with alpha channel.
IG_COLOR_SPACE_ID_GyPA	Intensity with pre-multiplied alpha channel.
IG_COLOR_SPACE_ID_RGBAEx	RGB with alpha and extra channels.
IG_COLOR_SPACE_ID_RGBPAEx	RGB with pre-multiplied alpha and extra channels.
IG_COLOR_SPACE_ID_Unknown	Unknown - no color or alpha channels, only extra channels are present.
IG_COLOR_SPACE_ID_HSL	HSL.