Obtains values that are needed to calculate red pixel values in TrueColor and DirectColor.
The “mask” is the significant bits within the pixel. The “shift” is the number of bits left we must shift a primary for it to be in position (according to the "mask"). Finally, "precision" refers to how much precision the pixel value contains for a particular primary.
| this |
A Visual |
| mask |
A pointer to a uint32 to be filled in, or null |
| shift |
A pointer to a SortColumn to be filled in, or null |
| precision |
A pointer to a SortColumn to be filled in, or null |