81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/*
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*Copyright (C) 2001-2004 Harold L Hunt II All Rights Reserved.
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*
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*Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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*"Software"), to deal in the Software without restriction, including
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*without limitation the rights to use, copy, modify, merge, publish,
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*distribute, sublicense, and/or sell copies of the Software, and to
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*permit persons to whom the Software is furnished to do so, subject to
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*the following conditions:
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*
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*The above copyright notice and this permission notice shall be
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*included in all copies or substantial portions of the Software.
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*
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*THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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*EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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*MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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*NONINFRINGEMENT. IN NO EVENT SHALL HAROLD L HUNT II BE LIABLE FOR
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*ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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*CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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*WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*Except as contained in this notice, the name of Harold L Hunt II
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*shall not be used in advertising or otherwise to promote the sale, use
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*or other dealings in this Software without prior written authorization
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*from Harold L Hunt II.
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*
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* Authors: Harold L Hunt II
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*/
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#ifdef HAVE_XWIN_CONFIG_H
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#include <xwin-config.h>
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#endif
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#include "win.h"
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/*
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* Count the number of one bits in a color mask.
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*/
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CARD8
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winCountBits(DWORD dw)
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{
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DWORD dwBits = 0;
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while (dw) {
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dwBits += (dw & 1);
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dw >>= 1;
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}
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return dwBits;
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}
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/*
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* Modify the screen pixmap to point to the new framebuffer address
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*/
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Bool
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winUpdateFBPointer(ScreenPtr pScreen, void *pbits)
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{
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winScreenPriv(pScreen);
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winScreenInfo *pScreenInfo = pScreenPriv->pScreenInfo;
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/* Location of shadow framebuffer has changed */
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pScreenInfo->pfb = pbits;
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/* Update the screen pixmap */
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if (!(*pScreen->ModifyPixmapHeader) (pScreen->devPrivate,
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pScreen->width,
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pScreen->height,
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pScreen->rootDepth,
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BitsPerPixel(pScreen->rootDepth),
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PixmapBytePad(pScreenInfo->dwStride,
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pScreenInfo->dwBPP),
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pScreenInfo->pfb)) {
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FatalError("winUpdateFramebufferPointer - Failed modifying "
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"screen pixmap\n");
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}
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return TRUE;
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}
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