CompuServe Messages

#RastPort.AreaInfo

    15-Dec-94 15:07:13
Fm: Werner Kazmierzak 100041,1320
To: Jim Maddox 74667,2175
Jim, I just tested your code and, of course, the display routine crashes the system. This is because you are forgetting to re-load the RastPort into a1 on every library call – remember, a1 will mostly contain crap after a call. This is how your display routine should look like: dopoly1: movem.l d2/a2-a3/a6,-(sp) ; added for security movea.l rastport_p,a1 movea.l a1,a3 ; >> SAVE IT FOR LATER moveq.l #10,d0 CALLSYS SetAPen,_GfxBase lea poly1dat,a2 * movea.l rastport_p,a1 ; commented out, now it is.. movea.l a3,a1 ; >> GET RASTPORT move.b #6,d2 move.w (a2)+,d0 ; x-coord move.w (a2)+,d1 ; y-coord CALLSYS AreaMove,_GfxBase dp1loop: move.w (a2)+,d0 move.w (a2)+,d1 movea.l a3,a1 ; >> GET RASTPORT !! CALLSYS AreaDraw,_GfxBase subq.b #1,d2 bne.s dp1loop ; MADE SHORT movea.l a3,a1 ; >> GET RASTPORT !! CALLSYS AreaEnd,_GfxBase movem.l (sp)+,d2/a2-a3/a6 ; added for security rts This will run just fine on my machine. If you still have problems, then I think you did not manage to set up TmpRas and AreaInfo correctly. Let me know! BTW, what sorta piece of s/w are you developing ? – wkc – … via AP from Hamburg, Germany