rom/graphics/initrastport.c

   1 /*
   2     Copyright © 1995-2011, The AROS Development Team. All rights reserved.
   3     $Id$        $Log
   4
   5     Desc: Graphics function InitRastPort()
   6     Lang: english
   7 */
   8
   9 #include <graphics/rastport.h>
  10 #include <proto/exec.h>
  11
  12 #include <string.h>
  13
  14 #include "graphics_intern.h"
  15 #include "gfxfuncsupport.h"
  16
  17 /*****************************************************************************
  18
  19     NAME */
  20 #include <proto/graphics.h>
  21
  22         AROS_LH1(void, InitRastPort,
  23
  24 /*  SYNOPSIS */
  25         AROS_LHA(struct RastPort *, rp, A1),
  26
  27 /*  LOCATION */
  28         struct GfxBase *, GfxBase, 33, Graphics)
  29
  30 /*  FUNCTION
  31         Initializes a RastPort structure.
  32
  33     INPUTS
  34         rp - The RastPort to initialize.
  35
  36     RESULT
  37         all entries in RastPort get zeroed out, with the following exceptions:
  38
  39             Mask, FgPen, AOLPen, and LinePtrn are set to -1.
  40             The DrawMode is set to JAM2
  41             The font is set to the standard system font
  42
  43     NOTES
  44
  45     EXAMPLE
  46
  47     BUGS
  48
  49     SEE ALSO
  50
  51     INTERNALS
  52
  53     HISTORY
  54         29-10-95    digulla automatically created from
  55                             graphics_lib.fd and clib/graphics_protos.h
  56
  57 *****************************************************************************/
  58 {
  59     AROS_LIBFUNC_INIT
  60
  61     /* Zero out everything, then set some valid defaults */
  62     memset(rp, 0, sizeof(struct RastPort));
  63
  64     rp->Mask     = 0xFF;
  65     rp->FgPen    = -1;
  66     rp->AOlPen   = -1;
  67     rp->DrawMode = JAM2;
  68     rp->LinePtrn = 0xFFFF;
  69
  70     SetFont (rp, GfxBase->DefaultFont);
  71
  72     AROS_LIBFUNC_EXIT
  73
  74 } /* InitRastPort */