workbench/libs/cgfx/getcyberidattr.c

   1 /*
   2     Copyright © 1995-2017, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang: english
   7 */
   8
   9 #include <aros/debug.h>
  10 #include <cybergraphx/cybergraphics.h>
  11 #include <hidd/gfx.h>
  12 #include <proto/graphics.h>
  13 #include <proto/oop.h>
  14
  15 #include "cybergraphics_intern.h"
  16 #include "gfxfuncsupport.h"
  17
  18 /*****************************************************************************
  19
  20     NAME */
  21 #include <proto/cybergraphics.h>
  22
  23         AROS_LH2(ULONG, GetCyberIDAttr,
  24
  25 /*  SYNOPSIS */
  26         AROS_LHA(ULONG, attribute,      D0),
  27         AROS_LHA(ULONG, DisplayModeID,  D1),
  28
  29 /*  LOCATION */
  30         struct Library *, CyberGfxBase, 17, Cybergraphics)
  31
  32 /*  FUNCTION
  33         Provides information about a specific RTG screenmode.
  34
  35     INPUTS
  36         attribute - one of the following display attributes:
  37             CYBERIDATTR_PIXFMT - the display's pixel format. See
  38                 LockBitMapTagList() for possible values.
  39             CYBERIDATTR_WIDTH - the display's width (in pixels).
  40             CYBERIDATTR_HEIGHT - the display's height (in pixels).
  41             CYBERIDATTR_DEPTH - the number of bits per pixel.
  42             CYBERIDATTR_BPPIX - the number of bytes per pixel.
  43         DisplayModeID - an RTG screenmode ID.
  44
  45     RESULT
  46         value - the value associated with the requested attribute.
  47
  48     NOTES
  49         If an unknown attribute is requested, -1 is returned.
  50
  51     EXAMPLE
  52
  53     BUGS
  54
  55     SEE ALSO
  56
  57     INTERNALS
  58         The function relies on pixelformat object being passed in
  59         DimensionInfo.reserved[1] by graphics.library/GetDisplayInfoData().
  60
  61 *****************************************************************************/
  62 {
  63     AROS_LIBFUNC_INIT
  64
  65     IPTR retval = (IPTR)-1;
  66     struct DimensionInfo info;
  67
  68     if (GetDisplayInfoData(NULL, (UBYTE *)&info, sizeof(info), DTAG_DIMS, DisplayModeID) == sizeof(info)) {
  69         OOP_Object *pf = (OOP_Object *)info.reserved[1];
  70
  71         switch (attribute)
  72         {
  73         case CYBRIDATTR_PIXFMT:
  74             OOP_GetAttr(pf, aHidd_PixFmt_CgxPixFmt, &retval);
  75             D(if (-1 == retval) bug("!!! NO CGFX PIXFMT IN GetCyberIDAttr() !!!\n");)
  76             break;
  77
  78         case CYBRIDATTR_DEPTH:
  79             retval = info.MaxDepth;
  80             break;
  81
  82         case CYBRIDATTR_WIDTH:
  83             retval = info.Nominal.MaxX - info.Nominal.MinX + 1;
  84             break;
  85
  86         case CYBRIDATTR_HEIGHT:
  87             retval = info.Nominal.MaxY - info.Nominal.MinY + 1;
  88             break;
  89
  90         case CYBRIDATTR_BPPIX:
  91             OOP_GetAttr(pf, aHidd_PixFmt_BytesPerPixel, &retval);
  92             break;
  93
  94         default:
  95             D(bug("!!! UNKNOWN ATTRIBUTE IN GetCyberIDAttr(): %x !!!\n",
  96                 attribute));
  97             break;
  98         }
  99     }
 100     return retval;
 101
 102     AROS_LIBFUNC_EXIT
 103 } /* GetCyberIDAttr */