1/*
2 *Copyright (C) 2001-2004 Harold L Hunt II All Rights Reserved.
3 *
4 *Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 *"Software"), to deal in the Software without restriction, including
7 *without limitation the rights to use, copy, modify, merge, publish,
8 *distribute, sublicense, and/or sell copies of the Software, and to
9 *permit persons to whom the Software is furnished to do so, subject to
10 *the following conditions:
11 *
12 *The above copyright notice and this permission notice shall be
13 *included in all copies or substantial portions of the Software.
14 *
15 *THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 *EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 *MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 *NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
19 *ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
20 *CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
21 *WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 *
23 *Except as contained in this notice, the name of Harold L Hunt II
24 *shall not be used in advertising or otherwise to promote the sale, use
25 *or other dealings in this Software without prior written authorization
26 *from Harold L Hunt II.
27 *
28 * Authors:	Harold L Hunt II
29 */
30
31#ifdef HAVE_XWIN_CONFIG_H
32#include <xwin-config.h>
33#endif
34#include "win.h"
35
36/*
37 * Count the number of one bits in a color mask.
38 */
39
40CARD8
41winCountBits(DWORD dw)
42{
43    DWORD dwBits = 0;
44
45    while (dw) {
46        dwBits += (dw & 1);
47        dw >>= 1;
48    }
49
50    return dwBits;
51}
52
53/*
54 * Modify the screen pixmap to point to the new framebuffer address
55 */
56
57Bool
58winUpdateFBPointer(ScreenPtr pScreen, void *pbits)
59{
60    winScreenPriv(pScreen);
61    winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
62
63    /* Location of shadow framebuffer has changed */
64    pScreenInfo->pfb = pbits;
65
66    /* Update the screen pixmap */
67    if (!(*pScreen->ModifyPixmapHeader) (pScreen->devPrivate,
68                                         pScreen->width,
69                                         pScreen->height,
70                                         pScreen->rootDepth,
71                                         BitsPerPixel(pScreen->rootDepth),
72                                         PixmapBytePad(pScreenInfo->dwStride,
73                                                       pScreenInfo->dwBPP),
74                                         pScreenInfo->pfb)) {
75        FatalError("winUpdateFramebufferPointer - Failed modifying "
76                   "screen pixmap\n");
77    }
78
79    return TRUE;
80}
81