workbench/libs/cgfx/iscybermodeid.c

   1 /*
   2     Copyright © 1995-2013, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8
   9 #include <hidd/graphics.h>
  10 #include <proto/graphics.h>
  11 #include <proto/oop.h>
  12
  13 #include "cybergraphics_intern.h"
  14 #include "gfxfuncsupport.h"
  15
  16 /*****************************************************************************
  17
  18     NAME */
  19 #include <proto/cybergraphics.h>
  20
  21         AROS_LH1(BOOL, IsCyberModeID,
  22
  23 /*  SYNOPSIS */
  24         AROS_LHA(ULONG, modeID, D0),
  25
  26 /*  LOCATION */
  27         struct Library *, CyberGfxBase, 9, Cybergraphics)
  28
  29 /*  FUNCTION
  30         Checks if the given display mode ID belongs to an RTG driver.
  31
  32     INPUTS
  33         modeID - a display mode ID to check.
  34
  35     RESULT
  36         result - TRUE if the mode belongs to an RTG driver, FALSE otherwise.
  37
  38     NOTES
  39
  40     EXAMPLE
  41
  42     BUGS
  43
  44     SEE ALSO
  45
  46     INTERNALS
  47         The function relies on the pixelformat object being passed in
  48         DimensionInfo.reserved[1] by graphics.library/GetDisplayInfoData().
  49
  50 *****************************************************************************/
  51 {
  52     AROS_LIBFUNC_INIT
  53
  54     struct DimensionInfo info;
  55
  56     /* This function works by querying pixelformat for the mode and checking if it is planar */
  57     if (GetDisplayInfoData(NULL, (UBYTE *)&info, sizeof(info), DTAG_DIMS, modeID) == sizeof(info)) {
  58         HIDDT_StdPixFmt stdpf;
  59         OOP_Object *pf = (OOP_Object *)info.reserved[1];
  60
  61         OOP_GetAttr(pf, aHidd_PixFmt_StdPixFmt, &stdpf);
  62
  63         return (stdpf != vHidd_StdPixFmt_Plane);
  64     }
  65
  66     return FALSE;
  67
  68     AROS_LIBFUNC_EXIT
  69 } /* IsCyberModeID */