Lists all HD Photo tag identifiers.
Values:
| IGMDTAG_ID_HDP_DATA | HD Photo metadata format identifier. |
| IGMDTAG_ID_HDP_PIXELFORMAT | Pixel format. |
| IGMDTAG_ID_HDP_IMAGEWIDTH | Image width. |
| IGMDTAG_ID_HDP_IMAGEHEIGHT | Image height. |
| IGMDTAG_ID_HDP_WIDTHRESOLUTION | Width resolution. |
| IGMDTAG_ID_HDP_HEIGHTRESOLUTION | Height resolution. |
| IGMDTAG_ID_HDP_IMAGEOFFSET | Image offset. |
| IGMDTAG_ID_HDP_IMAGEBYTECOUNT | Image byte count. |
| IGMDTAG_ID_HDP_ALPHAOFFSET | Alpha offset. |
| IGMDTAG_ID_HDP_ALPHABYTECOUNT | Alpha byte count. |
| IGMDTAG_ID_HDP_UNCOMPRESSED | Specifies that the image data is uncompressed. |
| IGMDTAG_ID_HDP_TRANSFORMATION | Transformation to be applied when decoding the image to present the desired representation. |
| IGMDTAG_ID_HDP_IMAGEDATADISCARD | Image data discard. |
| IGMDTAG_ID_HDP_ALPHADATADISCARD | Alpha data discard. |
| IGMDTAG_ID_HDP_IMAGETYPE | Image type. |
| IGMDTAG_ID_HDP_ICCPROFILE | ICC Profile. |
| IGMDTAG_ID_HDP_XMP | XMP metadata. |
| IGMDTAG_ID_HDP_PADDING | Data padding. |