workbench/libs/cgfx/invertpixelarray.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 <hidd/gfx.h>
  10 #include <aros/debug.h>
  11
  12 #include "cybergraphics_intern.h"
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17 #include <proto/cybergraphics.h>
  18
  19         AROS_LH5(ULONG, InvertPixelArray,
  20
  21 /*  SYNOPSIS */
  22         AROS_LHA(struct RastPort *, rp          , A1),
  23         AROS_LHA(UWORD            , destx       , D0),
  24         AROS_LHA(UWORD            , desty       , D1),
  25         AROS_LHA(UWORD            , width       , D2),
  26         AROS_LHA(UWORD            , height      , D3),
  27
  28 /*  LOCATION */
  29         struct Library *, CyberGfxBase, 24, Cybergraphics)
  30
  31 /*  FUNCTION
  32         Inverts each pixel in rectangular portion of a RastPort, i.e. applies
  33         a NOT operation to each bit of pixel data.
  34
  35     INPUTS
  36         rp - the RastPort to write to.
  37         destx, desty - top-lefthand corner of portion of RastPort to invert.
  38         width, height - size of the area to invert.
  39
  40     RESULT
  41         count - the number of pixels inverted.
  42
  43     NOTES
  44
  45     EXAMPLE
  46
  47     BUGS
  48
  49     SEE ALSO
  50
  51     INTERNALS
  52
  53 *****************************************************************************/
  54 {
  55     AROS_LIBFUNC_INIT
  56
  57     /* This is cybergraphx. We only work wih HIDD bitmaps */
  58     if (!IS_HIDD_BM(rp->BitMap))
  59     {
  60         D(bug("!!!!! Trying to use CGFX call on non-hidd bitmap "
  61             "in InvertPixelArray() !!!\n"));
  62         return 0;
  63     }
  64
  65     return (LONG)FillRectPenDrMd(rp, destx, desty, destx + width  - 1,
  66         desty + height - 1, 0xFF, vHidd_GC_DrawMode_Invert, TRUE);
  67
  68     AROS_LIBFUNC_EXIT
  69 } /* InvertPixelArray */