rom/hyperlayers/createupfronthooklayer.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8 #include <proto/graphics.h>
   9 #include <proto/exec.h>
  10 #include <exec/memory.h>
  11 #include <exec/types.h>
  12 #include <aros/libcall.h>
  13 #include <utility/tagitem.h>
  14 #include <graphics/clip.h>
  15 #include "layers_intern.h"
  16
  17
  18 /*****************************************************************************
  19
  20     NAME */
  21 #include <proto/layers.h>
  22
  23         AROS_LH9(struct Layer *, CreateUpfrontHookLayer,
  24
  25 /*  SYNOPSIS */
  26         AROS_LHA(struct Layer_Info *, li, A0),
  27         AROS_LHA(struct BitMap     *, bm, A1),
  28         AROS_LHA(LONG               , x0, D0),
  29         AROS_LHA(LONG               , y0, D1),
  30         AROS_LHA(LONG               , x1, D2),
  31         AROS_LHA(LONG               , y1, D3),
  32         AROS_LHA(LONG               , flags, D4),
  33         AROS_LHA(struct Hook       *, hook, A3),
  34         AROS_LHA(struct BitMap     *, bm2, A2),
  35
  36 /*  LOCATION */
  37         struct LayersBase *, LayersBase, 31, Layers)
  38
  39 /*  FUNCTION
  40         Create a new layer at the given position and with the
  41         given size. The new layer will be in front of all other
  42         layers. If it is a backdrop layer it will be created
  43         in front of all other backdrop layers and behind all
  44         non backdrop layers.
  45         Install the given hook as a backfill hook. This hook will
  46         be called whenever a part of the layer is supposed to be
  47         filled with a certain pattern. The backfill hook has to
  48         do that.
  49         If a super bitmap layer is wanted the flags LAYERSUPER and
  50         the flag LAYERSMART have to be set and a pointer to a
  51         bitmap must also be passed to this function.
  52
  53     INPUTS
  54         li    - pointer to LayerInfo structure
  55         bm    - pointer to common bitmap
  56         x0, y0- upper left corner of the layer
  57         x1, y1- lower right corner of the layer
  58         flags - choose the type of layer by setting some flags
  59         hook  - pointer to the backfill hook of this layer
  60                 The backfill hook will be called with
  61                      object = (struct RastPort *) result->RastPort
  62                 and message = [ (struct Layer *) layer,
  63                                 (struct Rectangle) bounds,
  64                                 (WORD) offsetx,
  65                                 (WORD) offsety ]
  66         bm2   - pointer to optional super bitmap.
  67
  68     RESULT
  69         pointer to layer if successful, NULL otherwise
  70
  71     NOTES
  72         Does not allow to create layers that are partially outside
  73         the given bitmap (, yet).
  74
  75     EXAMPLE
  76
  77     BUGS
  78
  79     SEE ALSO
  80
  81     INTERNALS
  82
  83     HISTORY
  84         27-11-96    digulla automatically created from
  85                             layers_lib.fd and clib/layers_protos.h
  86
  87 *****************************************************************************/
  88 {
  89   AROS_LIBFUNC_INIT
  90   AROS_LIBBASE_EXT_DECL(struct LayersBase *,LayersBase)
  91
  92   struct TagItem tagList[5] = {{LA_Priority    , 0},
  93                                {LA_Hook        , NULL},
  94                                {LA_SuperBitMap , NULL},
  95                                {TAG_DONE       , 0UL}};
  96
  97   tagList[0].ti_Data = (LAYERBACKDROP == (flags & LAYERBACKDROP)) ?
  98                        BACKDROPPRIORITY:
  99                        UPFRONTPRIORITY;
 100   tagList[1].ti_Data = (IPTR)hook;
 101   tagList[2].ti_Data = (IPTR)bm2;
 102
 103   return CreateLayerTagList(li,
 104                             bm,
 105                             x0, y0, x1, y1,
 106                             flags,
 107                             &tagList[0]);
 108
 109
 110   AROS_LIBFUNC_EXIT
 111
 112 } /* CreateUpfrontHookLayer */