rom/graphics/addvsprite.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Graphics function AddVSprite()
   6     Lang: english
   7 */
   8 #include <graphics/gels.h>
   9 #include <graphics/rastport.h>
  10 #include "graphics_intern.h"
  11 #include "gels_internal.h"
  12 #include <proto/exec.h>
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17 #include <proto/graphics.h>
  18
  19         AROS_LH2(void, AddVSprite,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(struct VSprite *, vs, A0),
  23         AROS_LHA(struct RastPort *, rp, A1),
  24
  25 /*  LOCATION */
  26         struct GfxBase *, GfxBase, 17, Graphics)
  27
  28 /*  FUNCTION
  29         The VSprite is linked into the current gel list using it's
  30         y and x coordinates. The VSprite's flags are set up.
  31
  32     INPUTS
  33         vs = pointer to VSprite to be linked into gel list
  34         rp = pointer to RastPort that has an initialized GelsInfo linked
  35              to it (see InitGels()).
  36
  37     RESULT
  38
  39     NOTES
  40
  41     EXAMPLE
  42
  43     BUGS
  44
  45     SEE ALSO
  46         InitGels(), graphics/gels.h, graphics/rastport.h
  47
  48     INTERNALS
  49
  50     HISTORY
  51
  52 *****************************************************************************/
  53 {
  54         AROS_LIBFUNC_INIT
  55
  56         struct VSprite * CurVSprite;
  57         /* the Y-coordinate is most significant! */
  58         LONG Koord = JOIN_XY_COORDS(vs->X, vs->Y);
  59
  60         /* Reset the Flags for this VSprite and set OldX/Y */
  61         vs -> Flags &= 0xFF;
  62         vs -> OldY = vs -> Y;
  63         vs -> OldX = vs -> X;
  64
  65         CurVSprite = rp->GelsInfo->gelHead;
  66
  67         /* look for the appropriate place to insert the VSprite into the
  68            list of VSprites which is connected to the GelsInfo which was
  69            previously found in the rastport */
  70
  71         while ((CurVSprite->NextVSprite) && (JOIN_XY_COORDS(CurVSprite->NextVSprite->X, CurVSprite->NextVSprite->Y) < Koord))
  72                 CurVSprite = CurVSprite->NextVSprite;
  73
  74         /* insert the new VSprite *after* CurVSprite */
  75
  76         if (CurVSprite -> NextVSprite)
  77         {
  78             CurVSprite -> NextVSprite -> PrevVSprite = vs;
  79             vs -> NextVSprite = CurVSprite -> NextVSprite;
  80         }
  81         vs -> PrevVSprite = CurVSprite;
  82         CurVSprite -> NextVSprite = vs;
  83
  84         /*
  85          * Create he IntVSprite structure for improved handling of
  86          * the VSprite ImageData.
  87          */
  88         vs -> IntVSprite = _CreateIntVSprite(vs, rp, GfxBase);
  89
  90         AROS_LIBFUNC_EXIT
  91
  92 } /* AddVSprite */