rom/graphics/freebitmap.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Free the memory occupied by a BitMap.
   6     Lang: english
   7 */
   8 #include <aros/debug.h>
   9 #include <exec/memory.h>
  10 #include <proto/exec.h>
  11 #include "graphics_intern.h"
  12 #include "gfxfuncsupport.h"
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17 #include <graphics/gfx.h>
  18 #include <proto/graphics.h>
  19
  20         AROS_LH1(void, FreeBitMap,
  21
  22 /*  SYNOPSIS */
  23         AROS_LHA(struct BitMap *, bm, A0),
  24
  25 /*  LOCATION */
  26         struct GfxBase *, GfxBase, 154, Graphics)
  27
  28 /*  FUNCTION
  29         Returns the memory occupied by the BitMap to the system.
  30
  31     INPUTS
  32         bm - The result of AllocBitMap(). Must be non-NULL.
  33
  34     RESULT
  35         None.
  36
  37     NOTES
  38
  39     EXAMPLE
  40
  41     BUGS
  42
  43     SEE ALSO
  44         AllocBitMap(), AllocRaster(), FreeRaster()
  45
  46     INTERNALS
  47
  48     HISTORY
  49
  50 *****************************************************************************/
  51 {
  52     AROS_LIBFUNC_INIT
  53
  54     if (!bm) return;
  55
  56     ASSERT_VALID_PTR(bm);
  57
  58     if (bm->pad != 0 || (bm->Flags & BMF_AROS_HIDD))
  59     {
  60         if (HIDD_BM_FLAGS(bm) & HIDD_BMF_SHARED_PIXTAB)
  61         {
  62             /* NULL colormap otherwise bitmap killing also kills
  63                the colormap object of the bitmap object
  64                from which we shared it = to which it belongs */
  65
  66             HIDD_BM_SetColorMap(HIDD_BM_OBJ(bm), NULL);
  67         }
  68         else if (HIDD_BM_FLAGS(bm) & HIDD_BMF_SCREEN_BITMAP) // (bm->Flags & BMF_DISPLAYABLE)
  69         {
  70             FreeVec(HIDD_BM_PIXTAB(bm));
  71         }
  72
  73         HIDD_Gfx_DisposeBitMap(SDD(GfxBase)->gfxhidd, (OOP_Object *)HIDD_BM_OBJ(bm));
  74
  75         FreeMem(bm, sizeof (struct BitMap));
  76     }
  77     else
  78     {
  79         ULONG plane;
  80         ULONG width;
  81
  82         width = bm->BytesPerRow * 8;
  83
  84         for (plane=0; plane < bm->Depth; plane ++)
  85         {
  86             /* Take care of two special cases: plane pointers containing NULL or -1
  87              * are supported by BltBitMap() as all 0's and all 1's planes
  88              */
  89             if (bm->Planes[plane] && bm->Planes[plane] != (PLANEPTR)-1)
  90             {
  91                 ASSERT_VALID_PTR(bm->Planes[plane]);
  92                 FreeRaster (bm->Planes[plane], width, bm->Rows);
  93             }
  94         }
  95
  96         FreeMem (bm, sizeof(struct BitMap) +
  97                      ((bm->Depth > 8) ? (bm->Depth - 8) * sizeof(PLANEPTR) : 0));
  98     }
  99
 100     AROS_LIBFUNC_EXIT
 101 } /* FreeBitMap */