xorg-server-1.4/afb/afbmisc.c

   1 /***********************************************************
   2
   3 Copyright (c) 1987  X Consortium
   4
   5 Permission is hereby granted, free of charge, to any person obtaining a copy
   6 of this software and associated documentation files (the "Software"), to deal
   7 in the Software without restriction, including without limitation the rights
   8 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   9 copies of the Software, and to permit persons to whom the Software is
  10 furnished to do so, subject to the following conditions:
  11
  12 The above copyright notice and this permission notice shall be included in
  13 all copies or substantial portions of the Software.
  14
  15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  18 X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  19 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  20 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  21
  22 Except as contained in this notice, the name of the X Consortium shall not be
  23 used in advertising or otherwise to promote the sale, use or other dealings
  24 in this Software without prior written authorization from the X Consortium.
  25
  26
  27 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  28
  29                         All Rights Reserved
  30
  31 Permission to use, copy, modify, and distribute this software and its
  32 documentation for any purpose and without fee is hereby granted,
  33 provided that the above copyright notice appear in all copies and that
  34 both that copyright notice and this permission notice appear in
  35 supporting documentation, and that the name of Digital not be
  36 used in advertising or publicity pertaining to distribution of the
  37 software without specific, written prior permission.
  38
  39 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  40 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  41 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  42 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  43 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  44 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  45 SOFTWARE.
  46
  47 ******************************************************************/
  48
  49 #ifdef HAVE_DIX_CONFIG_H
  50 #include <dix-config.h>
  51 #endif
  52
  53 #include <X11/X.h>
  54 #include "misc.h"
  55 #include "cursor.h"
  56 #include "scrnintstr.h"
  57
  58 #include "afb.h"
  59
  60 /*ARGSUSED*/
  61 void
  62 afbQueryBestSize(class, pwidth, pheight, pScreen)
  63 int class;
  64 unsigned short *pwidth;
  65 unsigned short *pheight;
  66 ScreenPtr pScreen;
  67 {
  68         unsigned width, test;
  69
  70         switch(class) {
  71                 case CursorShape:
  72                         if (*pwidth > pScreen->width)
  73                                  *pwidth = pScreen->width;
  74                         if (*pheight > pScreen->height)
  75                                  *pheight = pScreen->height;
  76                         break;
  77                 case TileShape:
  78                 case StippleShape:
  79                         width = *pwidth;
  80                         if (!width) break;
  81                                 /* Return the closes power of two not less than what they gave me */
  82                                 test = 0x80000000;
  83                         /* Find the highest 1 bit in the width given */
  84                         while(!(test & width))
  85                                 test >>= 1;
  86                         /* If their number is greater than that, bump up to the next
  87                          *  power of two */
  88                         if((test - 1) & width)
  89                                  test <<= 1;
  90                         *pwidth = test;
  91                         /* We don't care what height they use */
  92                         break;
  93         }
  94 }