Topic       : The GFA-BASIC Toolkit - Volume 1
Author      : John L. Hutchinson
Version     : GFA_TKV1.HYP v0.50 (7/14/2008)
Subject     : GFABASIC/Documentation
Nodes       : 164
Index Size  : 3048
HCP-Version : 5
Compiled on : Atari
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@hostname   : CAB     2.01-7                           bmove_effects                            3.07+

BRIEF:  BMOVE video effects

 FILE:  BMOVE.LST

 CALL:  see REM:

PARMS:  None

 INIT:  Must initialize background screens (see NOTE:).

  USE:  Moves a background screen image to the foreground screen using
        different video effects.

   EX:  scrollup

  REM:  This routine consists of seven separate BMOVE type video effect
        procedures that are called independently. No parameters are required.
        The procedures included in this routine are:

        rollup          uncover
        rolldown        cover
        scrollup        venetian
        scrolldown

        Rather than attempt to describe how each procedure displays the screen
        data, it is recommended that you load and try them with the BMOVE.LST
        file.

        These video effects may also be viewed with the use of the
        demonstration programs in the DEMOS\ folder of your Toolkit disk.

 NOTE:  These procedures use the BMOVE command and a 32K screen buffer to
        quickly move screen data. You must initialize these procedures by
        setting aside screen memory as shown below:

        scr0%=XBIOS(2) ! physical screen
        scr1$=STRING$(32767,0)
        scr1%=V:scr1$ ! background screen 1