Identifies the different color components of RGB color.
Values:
| IG_DSPL_R_CHANNEL | Red color component. |
| IG_DSPL_G_CHANNEL | Green color component. |
| IG_DSPL_B_CHANNEL | Blue color component. |
| IG_DSPL_ALL_CHANNELS | An "OR" combination of 3 flags above; identifies all 3 color components. |