78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
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* Copyright © 1999 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include <kdrive-config.h>
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#endif
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#include "kdrive.h"
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Bool KdShadowFbAlloc(KdScreenInfo * screen, Bool rotate)
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{
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int paddedWidth;
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void *buf;
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int width = rotate ? screen->height : screen->width;
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int height = rotate ? screen->width : screen->height;
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int bpp = screen->fb.bitsPerPixel;
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/* use fb computation for width */
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paddedWidth = ((width * bpp + FB_MASK) >> FB_SHIFT) * sizeof(FbBits);
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buf = malloc(paddedWidth * height);
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if (!buf)
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return FALSE;
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if (screen->fb.shadow)
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free(screen->fb.frameBuffer);
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screen->fb.shadow = TRUE;
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screen->fb.frameBuffer = buf;
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screen->fb.byteStride = paddedWidth;
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screen->fb.pixelStride = paddedWidth * 8 / bpp;
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return TRUE;
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}
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void KdShadowFbFree(KdScreenInfo * screen)
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{
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if (screen->fb.shadow) {
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free(screen->fb.frameBuffer);
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screen->fb.frameBuffer = 0;
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screen->fb.shadow = FALSE;
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}
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}
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Bool
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KdShadowSet(ScreenPtr pScreen, int randr, ShadowUpdateProc update,
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ShadowWindowProc window)
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{
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KdScreenPriv(pScreen);
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KdScreenInfo *screen = pScreenPriv->screen;
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shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
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if (screen->fb.shadow) {
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return shadowAdd(pScreen, pScreen->GetScreenPixmap(pScreen),
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update, window, randr, 0);
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}
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return TRUE;
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}
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void KdShadowUnset(ScreenPtr pScreen)
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{
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shadowRemove(pScreen, pScreen->GetScreenPixmap(pScreen));
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}
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