1 files changed, 92 insertions, 0 deletions
diff --git a/hw/kdrive/src/kcurscol.c b/hw/kdrive/src/kcurscol.c
new file mode 100644
index 000000000..a6882b96d
--- /dev/null
+++ b/hw/kdrive/src/kcurscol.c
@@ -0,0 +1,92 @@
+/*
+ * $Id$
+ *
+ * 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"
+#include "cursorstr.h"
+
+static int
+KdComputeCmapShift (unsigned long mask)
+{
+    int	shift;
+    unsigned long   bit;
+    
+    shift = 16;
+    bit = 0x80000000;
+    while (!(mask & bit))
+    {
+	shift--;
+	bit >>= 1;
+    }
+    return shift;
+}
+
+#define Shift(v,d)  ((d) < 0 ? ((v) >> (-d)) : ((v) << (d)))
+
+void
+KdAllocateCursorPixels (ScreenPtr	pScreen,
+			CursorPtr	pCursor, 
+			Pixel		*source,
+			Pixel		*mask)
+{
+    xColorItem	    sourceColor, maskColor;
+    int		    r, g, b;
+    KdScreenPriv(pScreen);
+
+    if (pScreenPriv->screen->redMask)
+    {
+
+	r = KdComputeCmapShift (pScreenPriv->screen->redMask);
+	g = KdComputeCmapShift (pScreenPriv->screen->greenMask);
+	b = KdComputeCmapShift (pScreenPriv->screen->blueMask);
+	*source = ((Shift(pCursor->foreRed,r) & pScreenPriv->screen->redMask) |
+			    (Shift(pCursor->foreGreen,g) & pScreenPriv->screen->greenMask) |
+			    (Shift(pCursor->foreBlue,b) & pScreenPriv->screen->blueMask));
+	*mask = ((Shift(pCursor->backRed,r) & pScreenPriv->screen->redMask) |
+			  (Shift(pCursor->backGreen,g) & pScreenPriv->screen->greenMask) |
+			  (Shift(pCursor->backBlue,b) & pScreenPriv->screen->blueMask));
+    }
+    else
+    {
+	/*
+	 * Set these to an invalid pixel value so that
+	 * when the store colors comes through, the cursor
+	 * won't get recolored
+	 */
+	*source = ~0;
+	*mask = ~0;
+	
+	sourceColor.red = pCursor->foreRed;
+	sourceColor.green = pCursor->foreGreen;
+	sourceColor.blue = pCursor->foreBlue;
+	FakeAllocColor(pScreenPriv->pInstalledmap, &sourceColor);
+	maskColor.red = pCursor->backRed;
+	maskColor.green = pCursor->backGreen;
+	maskColor.blue = pCursor->backBlue;
+	FakeAllocColor(pScreenPriv->pInstalledmap, &maskColor);
+	FakeFreeColor(pScreenPriv->pInstalledmap, sourceColor.pixel);
+	FakeFreeColor(pScreenPriv->pInstalledmap, maskColor.pixel);
+	*source = sourceColor.pixel;
+	*mask = maskColor.pixel;
+    }
+}