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ColourTrans Transfer Function
Programmer's Reference Manuals
» Part 8 - Non-kernel input/output
» ColourTrans
» SWI Calls
» ColourTrans_SelectTable
» Transfer Function
Transfer Function
| Entry | Contents |
|---|---|
| R0 | Palette entry |
| R5 | Bit 2 is set |
| R6 | Pointer to function to be called |
| R7 | Pointer to transfer function workspace |
| R12 | Workspace (as specified in R7) |
| Exit | Contents |
|---|---|
| R0 | Processed palette entry |
| All other registers are preserved | |
Notes
By setting bit 2 of the flags and R0 >= 256, ColourTrans will call the transfer function specified in R6 to pre-process each palette entry. R12 points to the workspace (as specified in R7).
The palette entry must be returned in R0, and all other register preserved.