qdosmsq:traps:trap_3:fill [QDOS Internals]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.

====== SD_FLOOD/IOG_FILL ======


This trap sets the graphics fill mode on or off. Once the mode has been set on, all non re-entrant shapes produced thereafter by the graphics traps will be filled with the ink colour until the mode is set off.

A non re-entrant shape is a closed curve such that no horizontal line passes through more than two points of the curve.

^Call Parameters^^Return Parameters^^
|D0.B|$35|D0.L|Corrupted?|
|D1.L|Mode key |D1.L|Corrupted.|
|D3.W|Timeout |D3.L|Preserved.|
|A0.L|Channel ID |A0.L|Preserved.|
|A1.L| |A1.L|Corrupted.|

===== Errors =====


|ERR_NC|Not complete.|
|ERR_NO|Channel not open.|


===== Notes =====
  * All registers not shown above are not used on entry and are preserved on exit.
  * The mode key in D1.L is 0 for off and 1 for on.

===== Example =====
The example below shows the use of this trap call to set the fill mode on.

<code>
mode    moveq   #1,d1           ; Set mode key to "on"
        moveq   #sd_flood,d0    ; $35
        moveq   #-1,d3          ; Timeout
        trap    #3              ; set the mode on
        tst.l   d0              ; OK? . .
        bne     error           ; . . no!

</code>