rom/graphics/setfrontbitmap.c

   1 /*
   2     Copyright © 1995-2007, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Private graphics function for allocating screen bitmaps
   6     Lang: english
   7 */
   8 #include <aros/debug.h>
   9 #include "graphics_intern.h"
  10 #include "gfxfuncsupport.h"
  11 #include <exec/memory.h>
  12 #include <graphics/rastport.h>
  13 #include <proto/exec.h>
  14 #include <proto/oop.h>
  15 #include <oop/oop.h>
  16
  17 /*****************************************************************************
  18
  19     NAME */
  20 #include <graphics/rastport.h>
  21 #include <proto/graphics.h>
  22
  23         AROS_LH2(BOOL , SetFrontBitMap,
  24
  25 /*  SYNOPSIS */
  26         AROS_LHA(struct BitMap *, bitmap, A0),
  27         AROS_LHA(BOOL, copyback, D0),
  28
  29 /*  LOCATION */
  30         struct GfxBase *, GfxBase, 184, Graphics)
  31
  32 /*  FUNCTION
  33         Sets the supplied screen as the frontmost, e.g. shows it in the display.
  34
  35     INPUTS
  36         bitmap - The bitmap to put in front. Must be a displayable bitmap.
  37         copyback - Whether to copy back from the framebuffer into
  38                    the previously front bitmap. !!!! Only set this to TRUE
  39                    this if you are 100% SURE that
  40                    the previously shown bitmap has not been disposed
  41
  42     RESULT
  43         success - TRUE if successful, FALSE otherwise.
  44
  45     NOTES
  46         This function is private and AROS specific.
  47
  48     EXAMPLE
  49
  50     BUGS
  51
  52     SEE ALSO
  53
  54     INTERNALS
  55
  56     HISTORY
  57
  58 *****************************************************************************/
  59 {
  60     AROS_LIBFUNC_INIT
  61
  62     #warning THIS IS NOT THREADSAFE
  63
  64     /* To make this threadsafe we have to lock
  65        all gfx access in all the rendering calls
  66     */
  67     OOP_Object          *cmap, *pf;
  68     HIDDT_ColorModel    colmod;
  69     OOP_Object          *fb;
  70     BOOL                ok = FALSE;
  71     ULONG               showflags = 0;
  72
  73     //if (bitmap && (BMF_DISPLAYABLE != (bitmap->Flags & BMF_DISPLAYABLE)))
  74     if (bitmap && (!(bitmap->Flags & BMF_AROS_HIDD) || !(HIDD_BM_FLAGS(bitmap) & HIDD_BMF_SCREEN_BITMAP)))
  75     {
  76         D(bug("!!! SetFrontBitMap: TRYING TO SET NON-DISPLAYABLE BITMAP !!!\n"));
  77         return FALSE;
  78     }
  79
  80     if ( SDD(GfxBase)->frontbm == bitmap)
  81     {
  82         D(bug("!!!!!!!!!!!!!!! SHOWING BITMAP %p TWICE !!!!!!!!!!!\n", bitmap));
  83         return TRUE;
  84     }
  85
  86     if (copyback)
  87     {
  88         showflags |= fHidd_Gfx_Show_CopyBack;
  89     }
  90
  91     fb = HIDD_Gfx_Show(SDD(GfxBase)->gfxhidd, (bitmap ? HIDD_BM_OBJ(bitmap) : NULL), showflags);
  92
  93     if (NULL == fb)
  94     {
  95         D(bug("!!! SetFrontBitMap: HIDD_Gfx_Show() FAILED !!!\n"));
  96     }
  97     else
  98     {
  99         Forbid();
 100
 101          /* Set this as the active screen */
 102         if (NULL != SDD(GfxBase)->frontbm)
 103         {
 104             struct BitMap *oldbm;
 105             /* Put back the old values into the old bitmap */
 106             oldbm = SDD(GfxBase)->frontbm;
 107             HIDD_BM_OBJ(oldbm)          = SDD(GfxBase)->bm_bak;
 108             HIDD_BM_COLMOD(oldbm)       = SDD(GfxBase)->colmod_bak;
 109             HIDD_BM_COLMAP(oldbm)       = SDD(GfxBase)->colmap_bak;
 110         }
 111
 112
 113         SDD(GfxBase)->frontbm           = bitmap;
 114         SDD(GfxBase)->bm_bak            = bitmap ? HIDD_BM_OBJ(bitmap) : NULL;
 115         SDD(GfxBase)->colmod_bak        = bitmap ? HIDD_BM_COLMOD(bitmap) : NULL;
 116         SDD(GfxBase)->colmap_bak        = bitmap ? HIDD_BM_COLMAP(bitmap) : NULL;
 117
 118         if (bitmap)
 119         {
 120             /* Insert the framebuffer in its place */
 121             OOP_GetAttr(fb, aHidd_BitMap_ColorMap, (IPTR *)&cmap);
 122             OOP_GetAttr(fb, aHidd_BitMap_PixFmt, (IPTR *)&pf);
 123             OOP_GetAttr(pf, aHidd_PixFmt_ColorModel, &colmod);
 124
 125             HIDD_BM_OBJ(bitmap) = fb;
 126             HIDD_BM_COLMOD(bitmap)      = colmod;
 127             HIDD_BM_COLMAP(bitmap)      = cmap;
 128         }
 129         Permit();
 130
 131         ok = TRUE;
 132     }
 133
 134     return ok;
 135
 136     AROS_LIBFUNC_EXIT
 137
 138 } /* AllocScreenBitMap */