Lists all TGA tag identifiers.

Values:

IGMDTAG_ID_TGA_FORMAT	TGA metadata format identifier.
IGMDTAG_ID_TGA_HEAD	Header data section.
IGMDTAG_ID_TGA_HEAD_IDLENGTH	ID length.
IGMDTAG_ID_TGA_HEAD_COLORMAPTYPE	Color map type.
IGMDTAG_ID_TGA_HEAD_IMAGETYPE	Image type.
IGMDTAG_ID_TGA_HEAD_CMAPSTART	CMap start.
IGMDTAG_ID_TGA_HEAD_CMAPLENGTH	CMap length.
IGMDTAG_ID_TGA_HEAD_CMAPDEPTH	CMap depth.
IGMDTAG_ID_TGA_HEAD_XOFFSET	Absolute horizontal coordinate for the lower left corner of the image as it is positioned on a display device having an origin at the lower left of the screen.
IGMDTAG_ID_TGA_HEAD_YOFFSET	Absolute vertical coordinate for the lower left corner of the image as it is positioned on a display device having an origin at the lower left of the screen.
IGMDTAG_ID_TGA_HEAD_WIDTH	Image width.
IGMDTAG_ID_TGA_HEAD_HEIGHT	Image height.
IGMDTAG_ID_TGA_HEAD_PIXELDEPTH	Pixel depth.
IGMDTAG_ID_TGA_HEAD_IMAGEDESCRIPTOR	Image descriptor.
IGMDTAG_ID_TGA_FOOT	Footer data section.
IGMDTAG_ID_TGA_FOOT_EXTENSION_OFFSET	Extension offset.
IGMDTAG_ID_TGA_FOOT_DEVELOPER_OFFSET	Developer offset.
IGMDTAG_ID_TGA_FOOT_SIGNATURE	Signature string.
IGMDTAG_ID_TGA_EXT	Extension data section.
IGMDTAG_ID_TGA_EXT_SIZE	Extension size.
IGMDTAG_ID_TGA_EXT_AUTHORNAME	Author name.
IGMDTAG_ID_TGA_EXT_AUTHORCOMMENT	Author comment.
IGMDTAG_ID_TGA_EXT_STAMPMONTH	Stamp month.
IGMDTAG_ID_TGA_EXT_STAMPDAY	Stamp day.
IGMDTAG_ID_TGA_EXT_STAMPYEAR	Stamp year.
IGMDTAG_ID_TGA_EXT_STAMPHOUR	Stamp hour.
IGMDTAG_ID_TGA_EXT_STAMPMINUTE	Stamp minute.
IGMDTAG_ID_TGA_EXT_STAMPSECOND	Stamp second.
IGMDTAG_ID_TGA_EXT_JOBNAME	Job name .
IGMDTAG_ID_TGA_EXT_JOBHOUR	Job hour value.
IGMDTAG_ID_TGA_EXT_JOBMINUTE	Job minute value.
IGMDTAG_ID_TGA_EXT_JOBSECOND	Job second value.
IGMDTAG_ID_TGA_EXT_SOFTWAREID	Software ID.
IGMDTAG_ID_TGA_EXT_VERSIONNUMBER	Version number.
IGMDTAG_ID_TGA_EXT_VERSIONLETTER	Version letter.
IGMDTAG_ID_TGA_EXT_KEYCOLOR	Key color.
IGMDTAG_ID_TGA_EXT_PIXELNUMERATOR	Pixel numerator.
IGMDTAG_ID_TGA_EXT_PIXELDENOMINATOR	Pixel denominator.
IGMDTAG_ID_TGA_EXT_GAMMANUMERATOR	Gamma numerator.
IGMDTAG_ID_TGA_EXT_GAMMADENOMINATOR	Gamma denominator.
IGMDTAG_ID_TGA_EXT_COLOROFFSET	Color offset.
IGMDTAG_ID_TGA_EXT_STAMPOFFSET	Stamp offset.
IGMDTAG_ID_TGA_EXT_SCANOFFSET	Scan offset.
IGMDTAG_ID_TGA_EXT_ATTRIBUTESTYPE	Attributes type.
IGMDTAG_ID_TGA_IMAGE_ID	Image ID tag.