rom/graphics/setfrontbitmap.c

   1 /*
   2     Copyright © 1995-2001, 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     AROS_LIBBASE_EXT_DECL(struct GfxBase *,GfxBase)
  62
  63     #warning THIS IS NOT THREADSAFE
  64
  65     /* To make this threadsafe we have to lock
  66        all gfx access in all the rendering calls
  67     */
  68     OOP_Object          *cmap, *pf;
  69     HIDDT_ColorModel    colmod;
  70     OOP_Object          *fb;
  71     BOOL                ok = FALSE;
  72     ULONG               showflags = 0;
  73
  74     //if (bitmap && (BMF_DISPLAYABLE != (bitmap->Flags & BMF_DISPLAYABLE)))
  75     if (bitmap && (!(bitmap->Flags & BMF_AROS_HIDD) || !(HIDD_BM_FLAGS(bitmap) & HIDD_BMF_SCREEN_BITMAP)))
  76     {
  77         D(bug("!!! SetFrontBitMap: TRYING TO SET NON-DISPLAYABLE BITMAP !!!\n"));
  78         return FALSE;
  79     }
  80
  81     if ( SDD(GfxBase)->frontbm == bitmap)
  82     {
  83         D(bug("!!!!!!!!!!!!!!! SHOWING BITMAP %p TWICE !!!!!!!!!!!\n", bitmap));
  84         return TRUE;
  85     }
  86
  87     if (copyback)
  88     {
  89         showflags |= fHidd_Gfx_Show_CopyBack;
  90     }
  91
  92     fb = HIDD_Gfx_Show(SDD(GfxBase)->gfxhidd, (bitmap ? HIDD_BM_OBJ(bitmap) : NULL), showflags);
  93
  94     if (NULL == fb)
  95     {
  96         D(bug("!!! SetFrontBitMap: HIDD_Gfx_Show() FAILED !!!\n"));
  97     }
  98     else
  99     {
 100         Forbid();
 101
 102          /* Set this as the active screen */
 103         if (NULL != SDD(GfxBase)->frontbm)
 104         {
 105             struct BitMap *oldbm;
 106             /* Put back the old values into the old bitmap */
 107             oldbm = SDD(GfxBase)->frontbm;
 108             HIDD_BM_OBJ(oldbm)          = SDD(GfxBase)->bm_bak;
 109             HIDD_BM_COLMOD(oldbm)       = SDD(GfxBase)->colmod_bak;
 110             HIDD_BM_COLMAP(oldbm)       = SDD(GfxBase)->colmap_bak;
 111         }
 112
 113
 114         SDD(GfxBase)->frontbm           = bitmap;
 115         SDD(GfxBase)->bm_bak            = bitmap ? HIDD_BM_OBJ(bitmap) : NULL;
 116         SDD(GfxBase)->colmod_bak        = bitmap ? HIDD_BM_COLMOD(bitmap) : NULL;
 117         SDD(GfxBase)->colmap_bak        = bitmap ? HIDD_BM_COLMAP(bitmap) : NULL;
 118
 119         if (bitmap)
 120         {
 121             /* Insert the framebuffer in its place */
 122             OOP_GetAttr(fb, aHidd_BitMap_ColorMap, (IPTR *)&cmap);
 123             OOP_GetAttr(fb, aHidd_BitMap_PixFmt, (IPTR *)&pf);
 124             OOP_GetAttr(pf, aHidd_PixFmt_ColorModel, &colmod);
 125
 126             HIDD_BM_OBJ(bitmap) = fb;
 127             HIDD_BM_COLMOD(bitmap)      = colmod;
 128             HIDD_BM_COLMAP(bitmap)      = cmap;
 129         }
 130         Permit();
 131
 132         ok = TRUE;
 133     }
 134
 135     return ok;
 136
 137     AROS_LIBFUNC_EXIT
 138
 139 } /* AllocScreenBitMap */