hw/xfree86/ramdac/xf86RamDacCmap.c

   1 /*
   2  * Copyright 1998 by Alan Hourihane, Wigan, England.
   3  *
   4  * Permission to use, copy, modify, distribute, and sell this software and its
   5  * documentation for any purpose is hereby granted without fee, provided that
   6  * the above copyright notice appear in all copies and that both that
   7  * copyright notice and this permission notice appear in supporting
   8  * documentation, and that the name of Alan Hourihane not be used in
   9  * advertising or publicity pertaining to distribution of the software without
  10  * specific, written prior permission.  Alan Hourihane makes no representations
  11  * about the suitability of this software for any purpose.  It is provided
  12  * "as is" without express or implied warranty.
  13  *
  14  * ALAN HOURIHANE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  15  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  16  * EVENT SHALL ALAN HOURIHANE BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  17  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  18  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  19  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  20  * PERFORMANCE OF THIS SOFTWARE.
  21  *
  22  * Authors:  Alan Hourihane, <alanh@fairlite.demon.co.uk>
  23  *
  24  * Generic RAMDAC access to colormaps.
  25  */
  26
  27 #ifdef HAVE_XORG_CONFIG_H
  28 #include <xorg-config.h>
  29 #endif
  30
  31 #include <X11/X.h>
  32 #include <X11/Xproto.h>
  33 #include "windowstr.h"
  34 #include "mipointer.h"
  35 #include "micmap.h"
  36
  37 #include "xf86.h"
  38 #include "compiler.h"
  39 #include "colormapst.h"
  40 #include "xf86RamDacPriv.h"
  41
  42 void
  43 RamDacLoadPalette(ScrnInfoPtr pScrn, int numColors, int *indices, LOCO * colors,
  44                   VisualPtr pVisual)
  45 {
  46     RamDacRecPtr hwp = RAMDACSCRPTR(pScrn);
  47     int i, index;
  48
  49     for (i = 0; i < numColors; i++) {
  50         index = indices[i];
  51         (*hwp->WriteAddress) (pScrn, index);
  52         (*hwp->WriteData) (pScrn, colors[index].red);
  53         (*hwp->WriteData) (pScrn, colors[index].green);
  54         (*hwp->WriteData) (pScrn, colors[index].blue);
  55     }
  56 }
  57
  58 Bool
  59 RamDacHandleColormaps(ScreenPtr pScreen, int maxColors, int sigRGBbits,
  60                       unsigned int flags)
  61 {
  62     ScrnInfoPtr pScrn = xf86ScreenToScrn(pScreen);
  63     RamDacRecPtr hwp = RAMDACSCRPTR(pScrn);
  64
  65     if (hwp->LoadPalette == NULL)
  66         return xf86HandleColormaps(pScreen, maxColors, sigRGBbits,
  67                                    RamDacLoadPalette, NULL, flags);
  68     else
  69         return xf86HandleColormaps(pScreen, maxColors, sigRGBbits,
  70                                    hwp->LoadPalette, NULL, flags);
  71 }