Dashboard: GetTyreDashEdgeSup

       Name: GetTyreDashEdgeSup                                      [Show more]
       Type: Subroutine
   Category: Dashboard
    Summary: Copy the pixel bytes along the tyre and dashboard edges so they
             can be feathered
    Context: See this subroutine in context in the source code
 References: This subroutine is called as follows:
             * GetTyreDashEdges calls GetTyreDashEdgeSup


 Modify the FillAfterObject routine before calling it.


 Arguments:

   X                    Sets the destination address for the copy

   Y                    Alters the routine flow to either fill or copy

   A                    The value to use when copying black pixel bytes


IF _SUPERIOR OR _REVSPLUS

.GetTyreDashEdgeSup

 STX sedg7+1            \ Modify the following instruction at sedg7:
                        \
                        \   STA (P),Y -> STA (R),Y          when X = LO(R)
                        \
                        \   STA (P),Y -> STA (P),Y          when X = LO(P)

 STY sedg5+1            \ Modify the following instruction at sedg5:
                        \
                        \   BNE sedg8 -> BNE sedg1          when Y = &EF
                        \
                        \   BNE sedg8 -> BNE sedg8          when Y = &09

 STA sedg6+1            \ Modify the following instruction at sedg6:
                        \
                        \   LDA #&55 -> LDA #0              when A = 0
                        \
                        \   LDA #&55 -> LDA #&55            when A = &55

                        \ Fall through into FillAfterObjectSup to copy the edge
                        \ data to the location specified in (S R)

ENDIF