andreacavalli/xserver-multidpi
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Rework tiny-x vesa driver for shadowing and multiple screen support. Allow

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enable to fail and avoid crashing
This commit is contained in:
Keith Packard 2000-09-03 05:12:28 +00:00
parent c97fb611dd
commit db1a883d32
1 changed files with 46 additions and 0 deletions
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hw/kdrive/src/kshadow.c Normal file
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/*
* $Id$
*
* Copyright © 1999 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "kdrive.h"
Bool
KdShadowScreenInit (KdScreenInfo *screen)
{
void *buf;
buf = shadowAlloc (screen->width, screen->height, screen->fb[0].bitsPerPixel);
screen->fb[0].frameBuffer = buf;
screen->fb[0].byteStride = BitmapBytePad (screen->width * screen->fb[0].bitsPerPixel);
screen->fb[0].pixelStride = screen->fb[0].byteStride * 8 / screen->fb[0].bitsPerPixel;
screen->dumb = TRUE;
return TRUE;
}
Bool
KdShadowInitScreen (ScreenPtr pScreen, ShadowUpdateProc update, ShadowWindowProc window)
{
KdScreenPriv(pScreen);
return shadowInit (pScreen, update, window);
}