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/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include <kdrive-config.h>
#endif
#include "kdrive.h"
Bool
KdShadowFbAlloc (KdScreenInfo *screen, Bool rotate)
{
int paddedWidth;
void *buf;
int width = rotate ? screen->height : screen->width;
int height = rotate ? screen->width : screen->height;
int bpp = screen->fb.bitsPerPixel;
/* use fb computation for width */
paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof (FbBits);
buf = malloc(paddedWidth * height);
if (!buf)
return FALSE;
if (screen->fb.shadow)
free(screen->fb.frameBuffer);
screen->fb.shadow = TRUE;
screen->fb.frameBuffer = buf;
screen->fb.byteStride = paddedWidth;
screen->fb.pixelStride = paddedWidth * 8 / bpp;
return TRUE;
}
void
KdShadowFbFree (KdScreenInfo *screen)
{
if (screen->fb.shadow)
{
free(screen->fb.frameBuffer);
screen->fb.frameBuffer = 0;
screen->fb.shadow = FALSE;
}
}
Bool
KdShadowSet (ScreenPtr pScreen, int randr, ShadowUpdateProc update, ShadowWindowProc window)
{
KdScreenPriv(pScreen);
KdScreenInfo *screen = pScreenPriv->screen;
shadowRemove (pScreen, pScreen->GetScreenPixmap(pScreen));
if(screen->fb.shadow)
{
return shadowAdd (pScreen, pScreen->GetScreenPixmap(pScreen),
update, window, randr, 0);
}
return TRUE;
}
void
KdShadowUnset (ScreenPtr pScreen)
{
shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
}
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