95 lines
3.1 KiB
C
95 lines
3.1 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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#include "cursorstr.h"
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static int
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KdComputeCmapShift (unsigned long mask)
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{
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int shift;
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unsigned long bit;
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shift = 16;
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bit = 0x80000000;
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while (!(mask & bit))
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{
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shift--;
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bit >>= 1;
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}
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return shift;
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}
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#define Shift(v,d) ((d) < 0 ? ((v) >> (-d)) : ((v) << (d)))
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void
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KdAllocateCursorPixels (ScreenPtr pScreen,
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int fb,
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CursorPtr pCursor,
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Pixel *source,
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Pixel *mask)
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{
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xColorItem sourceColor, maskColor;
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int r, g, b;
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KdScreenPriv(pScreen);
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if (pScreenPriv->screen->fb[fb].redMask)
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{
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r = KdComputeCmapShift (pScreenPriv->screen->fb[fb].redMask);
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g = KdComputeCmapShift (pScreenPriv->screen->fb[fb].greenMask);
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b = KdComputeCmapShift (pScreenPriv->screen->fb[fb].blueMask);
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*source = ((Shift(pCursor->foreRed,r) & pScreenPriv->screen->fb[fb].redMask) |
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(Shift(pCursor->foreGreen,g) & pScreenPriv->screen->fb[fb].greenMask) |
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(Shift(pCursor->foreBlue,b) & pScreenPriv->screen->fb[fb].blueMask));
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*mask = ((Shift(pCursor->backRed,r) & pScreenPriv->screen->fb[fb].redMask) |
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(Shift(pCursor->backGreen,g) & pScreenPriv->screen->fb[fb].greenMask) |
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(Shift(pCursor->backBlue,b) & pScreenPriv->screen->fb[fb].blueMask));
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}
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else
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{
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/*
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* Set these to an invalid pixel value so that
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* when the store colors comes through, the cursor
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* won't get recolored
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*/
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*source = ~0;
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*mask = ~0;
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sourceColor.red = pCursor->foreRed;
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sourceColor.green = pCursor->foreGreen;
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sourceColor.blue = pCursor->foreBlue;
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FakeAllocColor(pScreenPriv->pInstalledmap[fb], &sourceColor);
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maskColor.red = pCursor->backRed;
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maskColor.green = pCursor->backGreen;
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maskColor.blue = pCursor->backBlue;
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FakeAllocColor(pScreenPriv->pInstalledmap[fb], &maskColor);
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FakeFreeColor(pScreenPriv->pInstalledmap[fb], sourceColor.pixel);
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FakeFreeColor(pScreenPriv->pInstalledmap[fb], maskColor.pixel);
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*source = sourceColor.pixel;
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*mask = maskColor.pixel;
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}
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}
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