Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 735 insertions, 0 deletions

diff --git a/nx-X11/programs/Xserver/hw/darwin/iokit/xfIOKitCursor.c b/nx-X11/programs/Xserver/hw/darwin/iokit/xfIOKitCursor.c
new file mode 100644
index 000000000..69eb41d2f
--- /dev/null
+++ b/nx-X11/programs/Xserver/hw/darwin/iokit/xfIOKitCursor.c
@@ -0,0 +1,735 @@
+/**************************************************************
+ *
+ * Cursor support for Darwin X Server
+ *
+ * Three different cursor modes are possible:
+ *  X (0)         - tracking via Darwin kernel,
+ *                  display via X machine independent
+ *  Kernel (1)    - tracking and display via Darwin kernel
+ *                  (not currently supported)
+ *  Hardware (2)  - tracking and display via hardware
+ *
+ * The X software cursor uses the Darwin software cursor
+ * routines in IOFramebuffer.cpp to track the cursor, but
+ * displays the cursor image using the X machine
+ * independent display cursor routines in midispcur.c.
+ *
+ * The kernel cursor uses IOFramebuffer.cpp routines to
+ * track and display the cursor. This gives better
+ * performance as the display calls don't have to cross
+ * the kernel boundary. Unfortunately, this mode has
+ * synchronization issues with the user land X server
+ * and isn't currently used.
+ *
+ * Hardware cursor support lets the hardware handle these
+ * details.
+ *
+ * Kernel and hardware cursor mode only work for cursors
+ * up to a certain size, currently 16x16 pixels. If a
+ * bigger cursor is set, we fallback to X cursor mode.
+ *
+ * HISTORY:
+ * 1.0 by Torrey T. Lyons, October 30, 2000
+ *
+ **************************************************************/
+/*
+ * Copyright (c) 2001-2002 Torrey T. Lyons. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name(s) of the above copyright
+ * holders shall not be used in advertising or otherwise to promote the sale,
+ * use or other dealings in this Software without prior written authorization.
+ */
+/* $XFree86: xc/programs/Xserver/hw/darwin/xfIOKitCursor.c,v 1.6 2002/12/10 00:00:39 torrey Exp $ */
+
+#include "scrnintstr.h"
+#include "cursorstr.h"
+#include "mipointrst.h"
+#include "micmap.h"
+#define NO_CFPLUGIN
+#include <IOKit/graphics/IOGraphicsLib.h>
+#include <IOKit/hidsystem/IOHIDLib.h>
+#include "darwin.h"
+#include "xfIOKit.h"
+
+#define DUMP_DARWIN_CURSOR FALSE
+
+#define CURSOR_PRIV(pScreen) \
+    ((XFIOKitCursorScreenPtr)pScreen->devPrivates[darwinCursorScreenIndex].ptr)
+
+// The cursors format are documented in IOFramebufferShared.h.
+#define RGBto34WithGamma(red, green, blue)  \
+    (  0x000F                               \
+     | (((red) & 0xF) << 12)                \
+     | (((green) & 0xF) << 8)               \
+     | (((blue) & 0xF) << 4) )
+#define RGBto38WithGamma(red, green, blue)  \
+    (  0xFF << 24                           \
+     | (((red) & 0xFF) << 16)               \
+     | (((green) & 0xFF) << 8)              \
+     | (((blue) & 0xFF)) )
+#define HighBitOf32 0x80000000
+
+typedef struct {
+    Bool                    canHWCursor;
+    short                   cursorMode;
+    RecolorCursorProcPtr    RecolorCursor;
+    InstallColormapProcPtr  InstallColormap;
+    QueryBestSizeProcPtr    QueryBestSize;
+    miPointerSpriteFuncPtr  spriteFuncs;
+    ColormapPtr             pInstalledMap;
+} XFIOKitCursorScreenRec, *XFIOKitCursorScreenPtr;
+
+static int darwinCursorScreenIndex = -1;
+static unsigned long darwinCursorGeneration = 0;
+
+/*
+===========================================================================
+
+ Pointer sprite functions
+
+===========================================================================
+*/
+
+/*
+    Realizing the Darwin hardware cursor (ie. converting from the
+    X representation to the IOKit representation) is complicated
+    by the fact that we have three different potential cursor
+    formats to go to, one for each bit depth (8, 15, or 24).
+    The IOKit formats are documented in IOFramebufferShared.h.
+    X cursors are represented as two pieces, a source and a mask.
+    The mask is a bitmap indicating which parts of the cursor are 
+    transparent and which parts are drawn.  The source is a bitmap
+    indicating which parts of the non-transparent portion of the the
+    cursor should be painted in the foreground color and which should
+    be painted in the background color. The bitmaps are given in
+    32-bit format with least significant byte and bit first.
+    (This is opposite PowerPC Darwin.)
+*/
+
+typedef struct {
+    unsigned char image[CURSORWIDTH*CURSORHEIGHT];
+    unsigned char mask[CURSORWIDTH*CURSORHEIGHT];
+} cursorPrivRec, *cursorPrivPtr;
+
+/*
+ * XFIOKitRealizeCursor8
+ * Convert the X cursor representation to an 8-bit depth
+ * format for Darwin. This function assumes the maximum cursor
+ * width is a multiple of 8.
+ */
+static Bool
+XFIOKitRealizeCursor8(
+    ScreenPtr pScreen,
+    CursorPtr pCursor)
+{
+    cursorPrivPtr   newCursor;
+    unsigned char   *newSourceP, *newMaskP;
+    CARD32          *oldSourceP, *oldMaskP;
+    xColorItem      fgColor, bgColor;
+    int             index, x, y, rowPad;
+    int             cursorWidth, cursorHeight;
+    ColormapPtr     pmap;
+
+    // check cursor size just to be sure
+    cursorWidth = pCursor->bits->width;
+    cursorHeight = pCursor->bits->height;
+    if (cursorHeight > CURSORHEIGHT || cursorWidth > CURSORWIDTH)
+        return FALSE;
+
+    // get cursor colors in colormap
+    index = pScreen->myNum;
+    pmap = miInstalledMaps[index];
+    if (!pmap) return FALSE;
+
+    fgColor.red = pCursor->foreRed;
+    fgColor.green = pCursor->foreGreen;
+    fgColor.blue = pCursor->foreBlue;
+    FakeAllocColor(pmap, &fgColor);
+    bgColor.red = pCursor->backRed;
+    bgColor.green = pCursor->backGreen;
+    bgColor.blue = pCursor->backBlue;
+    FakeAllocColor(pmap, &bgColor);
+    FakeFreeColor(pmap, fgColor.pixel);
+    FakeFreeColor(pmap, bgColor.pixel);
+
+    // allocate memory for new cursor image
+    newCursor = xalloc( sizeof(cursorPrivRec) );
+    if (!newCursor)
+        return FALSE;
+    memset( newCursor->image, pScreen->blackPixel, CURSORWIDTH*CURSORHEIGHT );
+    memset( newCursor->mask, 0, CURSORWIDTH*CURSORHEIGHT );
+
+    // convert to 8-bit Darwin cursor format
+    oldSourceP = (CARD32 *) pCursor->bits->source;
+    oldMaskP = (CARD32 *) pCursor->bits->mask;
+    newSourceP = newCursor->image;
+    newMaskP = newCursor->mask;
+    rowPad = CURSORWIDTH - cursorWidth;
+
+    for (y = 0; y < cursorHeight; y++) {
+        for (x = 0; x < cursorWidth; x++) {
+            if (*oldSourceP & (HighBitOf32 >> x))
+                *newSourceP = fgColor.pixel;
+            else
+                *newSourceP = bgColor.pixel;
+            if (*oldMaskP & (HighBitOf32 >> x))
+                *newMaskP = 255;
+            else
+                *newSourceP = pScreen->blackPixel;
+            newSourceP++; newMaskP++;
+        }
+        oldSourceP++; oldMaskP++;
+        newSourceP += rowPad; newMaskP += rowPad;
+    }
+
+    // save the result
+    pCursor->devPriv[pScreen->myNum] = (pointer) newCursor;
+    return TRUE;
+}
+
+
+/*
+ * XFIOKitRealizeCursor15
+ * Convert the X cursor representation to an 15-bit depth
+ * format for Darwin.
+ */
+static Bool
+XFIOKitRealizeCursor15(
+    ScreenPtr       pScreen,
+    CursorPtr       pCursor)
+{
+    unsigned short  *newCursor;
+    unsigned short  fgPixel, bgPixel;
+    unsigned short  *newSourceP;
+    CARD32          *oldSourceP, *oldMaskP;
+    int             x, y, rowPad;
+    int             cursorWidth, cursorHeight;
+
+    // check cursor size just to be sure
+    cursorWidth = pCursor->bits->width;
+    cursorHeight = pCursor->bits->height;
+    if (cursorHeight > CURSORHEIGHT || cursorWidth > CURSORWIDTH)
+       return FALSE;
+
+    // allocate memory for new cursor image
+    newCursor = xalloc( CURSORWIDTH*CURSORHEIGHT*sizeof(short) );
+    if (!newCursor)
+        return FALSE;
+    memset( newCursor, 0, CURSORWIDTH*CURSORHEIGHT*sizeof(short) );
+
+    // calculate pixel values
+    fgPixel = RGBto34WithGamma( pCursor->foreRed, pCursor->foreGreen,
+                                pCursor->foreBlue );
+    bgPixel = RGBto34WithGamma( pCursor->backRed, pCursor->backGreen,
+                                pCursor->backBlue );
+
+    // convert to 15-bit Darwin cursor format
+    oldSourceP = (CARD32 *) pCursor->bits->source;
+    oldMaskP = (CARD32 *) pCursor->bits->mask;
+    newSourceP = newCursor;
+    rowPad = CURSORWIDTH - cursorWidth;
+
+    for (y = 0; y < cursorHeight; y++) {
+        for (x = 0; x < cursorWidth; x++) {
+            if (*oldMaskP & (HighBitOf32 >> x)) {
+                if (*oldSourceP & (HighBitOf32 >> x))
+                    *newSourceP = fgPixel;
+                else
+                    *newSourceP = bgPixel;
+            } else {
+                *newSourceP = 0;
+            }
+            newSourceP++;
+        }
+        oldSourceP++; oldMaskP++;
+        newSourceP += rowPad;
+    }
+
+#if DUMP_DARWIN_CURSOR
+    // Write out the cursor
+    ErrorF("Cursor: 0x%x\n", pCursor);
+    ErrorF("Width = %i, Height = %i, RowPad = %i\n", cursorWidth,
+            cursorHeight, rowPad);
+    for (y = 0; y < cursorHeight; y++) {
+        newSourceP = newCursor + y*CURSORWIDTH;
+        for (x = 0; x < cursorWidth; x++) {
+            if (*newSourceP == fgPixel)
+                ErrorF("x");
+            else if (*newSourceP == bgPixel)
+                ErrorF("o");
+            else
+                ErrorF(" ");
+            newSourceP++;
+        }
+        ErrorF("\n");
+    }
+#endif
+
+    // save the result
+    pCursor->devPriv[pScreen->myNum] = (pointer) newCursor;
+    return TRUE;
+}
+
+
+/*
+ * XFIOKitRealizeCursor24
+ * Convert the X cursor representation to an 24-bit depth
+ * format for Darwin. This function assumes the maximum cursor
+ * width is a multiple of 8.
+ */
+static Bool
+XFIOKitRealizeCursor24(
+    ScreenPtr       pScreen,
+    CursorPtr       pCursor)
+{
+    unsigned int    *newCursor;
+    unsigned int    fgPixel, bgPixel;
+    unsigned int    *newSourceP;
+    CARD32          *oldSourceP, *oldMaskP;
+    int             x, y, rowPad;
+    int             cursorWidth, cursorHeight;
+
+    // check cursor size just to be sure
+    cursorWidth = pCursor->bits->width;
+    cursorHeight = pCursor->bits->height;
+    if (cursorHeight > CURSORHEIGHT || cursorWidth > CURSORWIDTH)
+       return FALSE;
+
+    // allocate memory for new cursor image
+    newCursor = xalloc( CURSORWIDTH*CURSORHEIGHT*sizeof(int) );
+    if (!newCursor)
+        return FALSE;
+    memset( newCursor, 0, CURSORWIDTH*CURSORHEIGHT*sizeof(int) );
+
+    // calculate pixel values
+    fgPixel = RGBto38WithGamma( pCursor->foreRed, pCursor->foreGreen,
+                                pCursor->foreBlue );
+    bgPixel = RGBto38WithGamma( pCursor->backRed, pCursor->backGreen,
+                                pCursor->backBlue );
+
+    // convert to 24-bit Darwin cursor format
+    oldSourceP = (CARD32 *) pCursor->bits->source;
+    oldMaskP = (CARD32 *) pCursor->bits->mask;
+    newSourceP = newCursor;
+    rowPad = CURSORWIDTH - cursorWidth;
+
+    for (y = 0; y < cursorHeight; y++) {
+        for (x = 0; x < cursorWidth; x++) {
+            if (*oldMaskP & (HighBitOf32 >> x)) {
+                if (*oldSourceP & (HighBitOf32 >> x))
+                    *newSourceP = fgPixel;
+                else
+                    *newSourceP = bgPixel;
+            } else {
+                *newSourceP = 0;
+            }
+            newSourceP++;
+        }
+        oldSourceP++; oldMaskP++;
+        newSourceP += rowPad;
+    }
+
+#if DUMP_DARWIN_CURSOR
+    // Write out the cursor
+    ErrorF("Cursor: 0x%x\n", pCursor);
+    ErrorF("Width = %i, Height = %i, RowPad = %i\n", cursorWidth,
+            cursorHeight, rowPad);
+    for (y = 0; y < cursorHeight; y++) {
+        newSourceP = newCursor + y*CURSORWIDTH;
+        for (x = 0; x < cursorWidth; x++) {
+            if (*newSourceP == fgPixel)
+                ErrorF("x");
+            else if (*newSourceP == bgPixel)
+                ErrorF("o");
+            else
+                ErrorF(" ");
+            newSourceP++;
+        }
+        ErrorF("\n");
+    }
+#endif
+
+    // save the result
+    pCursor->devPriv[pScreen->myNum] = (pointer) newCursor;
+    return TRUE;
+}
+
+
+/*
+ * XFIOKitRealizeCursor
+ * 
+ */
+static Bool
+XFIOKitRealizeCursor(
+    ScreenPtr       pScreen,
+    CursorPtr       pCursor)
+{
+    Bool                        result;
+    XFIOKitCursorScreenPtr      ScreenPriv = CURSOR_PRIV(pScreen);
+    DarwinFramebufferPtr        dfb = SCREEN_PRIV(pScreen);
+
+    if ((pCursor->bits->height > CURSORHEIGHT) ||
+        (pCursor->bits->width > CURSORWIDTH) ||
+        // FIXME: this condition is not needed after kernel cursor works
+        !ScreenPriv->canHWCursor) {
+        result = (*ScreenPriv->spriteFuncs->RealizeCursor)(pScreen, pCursor);
+    } else if (dfb->bitsPerPixel == 8) {
+        result = XFIOKitRealizeCursor8(pScreen, pCursor);
+    } else if (dfb->bitsPerPixel == 16) {
+        result = XFIOKitRealizeCursor15(pScreen, pCursor);
+    } else {
+        result = XFIOKitRealizeCursor24(pScreen, pCursor);
+    }
+
+    return result;
+}
+
+
+/*
+ * XFIOKitUnrealizeCursor
+ * 
+ */
+static Bool
+XFIOKitUnrealizeCursor(
+    ScreenPtr pScreen,
+    CursorPtr pCursor)
+{
+    Bool                        result;
+    XFIOKitCursorScreenPtr      ScreenPriv = CURSOR_PRIV(pScreen);
+
+    if ((pCursor->bits->height > CURSORHEIGHT) ||
+        (pCursor->bits->width > CURSORWIDTH) ||
+        // FIXME: this condition is not needed after kernel cursor works
+        !ScreenPriv->canHWCursor) {
+        result = (*ScreenPriv->spriteFuncs->UnrealizeCursor)(pScreen, pCursor);
+    } else {
+        xfree( pCursor->devPriv[pScreen->myNum] );
+        result = TRUE;
+    }
+
+    return result;
+}
+
+
+/*
+ * XFIOKitSetCursor
+ * Set the cursor sprite and position
+ * Use hardware cursor if possible
+ */
+static void
+XFIOKitSetCursor(
+    ScreenPtr       pScreen,
+    CursorPtr       pCursor,
+    int             x,
+    int             y)
+{
+    kern_return_t               kr;
+    DarwinFramebufferPtr        dfb = SCREEN_PRIV(pScreen);
+    XFIOKitScreenPtr            iokitScreen = XFIOKIT_SCREEN_PRIV(pScreen);
+    StdFBShmem_t                *cshmem = iokitScreen->cursorShmem;
+    XFIOKitCursorScreenPtr      ScreenPriv = CURSOR_PRIV(pScreen);
+
+    // are we supposed to remove the cursor?
+    if (!pCursor) {
+        if (ScreenPriv->cursorMode == 0)
+            (*ScreenPriv->spriteFuncs->SetCursor)(pScreen, 0, x, y);
+        else {
+            if (!cshmem->cursorShow) {
+                cshmem->cursorShow++;
+                if (cshmem->hardwareCursorActive) {
+                    kr = IOFBSetCursorVisible(iokitScreen->fbService, FALSE);
+                    kern_assert( kr );
+                }
+            }
+        }
+        return;
+    } 
+ 
+    // can we use the kernel or hardware cursor?
+    if ((pCursor->bits->height <= CURSORHEIGHT) &&
+        (pCursor->bits->width <= CURSORWIDTH) &&
+        // FIXME: condition not needed when kernel cursor works
+        ScreenPriv->canHWCursor) {
+
+        if (ScreenPriv->cursorMode == 0)    // remove the X cursor
+            (*ScreenPriv->spriteFuncs->SetCursor)(pScreen, 0, x, y);
+        ScreenPriv->cursorMode = 1;         // kernel cursor
+
+        // change the cursor image in shared memory
+        if (dfb->bitsPerPixel == 8) {
+            cursorPrivPtr newCursor =
+                    (cursorPrivPtr) pCursor->devPriv[pScreen->myNum];
+            memcpy(cshmem->cursor.bw8.image[0], newCursor->image,
+                        CURSORWIDTH*CURSORHEIGHT);
+            memcpy(cshmem->cursor.bw8.mask[0], newCursor->mask,
+                        CURSORWIDTH*CURSORHEIGHT);
+        } else if (dfb->bitsPerPixel == 16) {
+            unsigned short *newCursor =
+                    (unsigned short *) pCursor->devPriv[pScreen->myNum];
+            memcpy(cshmem->cursor.rgb.image[0], newCursor,
+                        2*CURSORWIDTH*CURSORHEIGHT);
+        } else {
+            unsigned int *newCursor =
+                    (unsigned int *) pCursor->devPriv[pScreen->myNum];
+            memcpy(cshmem->cursor.rgb24.image[0], newCursor,
+                        4*CURSORWIDTH*CURSORHEIGHT);
+        }
+
+        // FIXME: We always use a full size cursor, even if the image
+        // is smaller because I couldn't get the padding to come out
+        // right otherwise.
+        cshmem->cursorSize[0].width = CURSORWIDTH;
+        cshmem->cursorSize[0].height = CURSORHEIGHT;
+        cshmem->hotSpot[0].x = pCursor->bits->xhot;
+        cshmem->hotSpot[0].y = pCursor->bits->yhot;
+
+        // try to use a hardware cursor
+        if (ScreenPriv->canHWCursor) {
+            kr = IOFBSetNewCursor(iokitScreen->fbService, 0, 0, 0);
+            // FIXME: this is a fatal error without the kernel cursor
+            kern_assert( kr );
+#if 0
+            if (kr != KERN_SUCCESS) {
+                ErrorF("Could not set new cursor with kernel return 0x%x.\n", kr);
+                ScreenPriv->canHWCursor = FALSE;
+            }
+#endif
+        }
+
+        // make the new cursor visible
+        if (cshmem->cursorShow)
+            cshmem->cursorShow--;
+
+        if (!cshmem->cursorShow && ScreenPriv->canHWCursor) {
+            kr = IOFBSetCursorVisible(iokitScreen->fbService, TRUE);
+            // FIXME: this is a fatal error without the kernel cursor
+            kern_assert( kr );
+#if 0
+            if (kr != KERN_SUCCESS) {
+                ErrorF("Couldn't set hardware cursor visible with kernel return 0x%x.\n", kr);
+                ScreenPriv->canHWCursor = FALSE;
+            } else
+#endif
+                ScreenPriv->cursorMode = 2;     // hardware cursor
+        }
+
+	return; 
+    }
+
+    // otherwise we use a software cursor
+    if (ScreenPriv->cursorMode) {
+        /* remove the kernel or hardware cursor */
+        XFIOKitSetCursor(pScreen, 0, x, y);
+    }
+
+    ScreenPriv->cursorMode = 0;
+    (*ScreenPriv->spriteFuncs->SetCursor)(pScreen, pCursor, x, y);
+}
+
+
+/*
+ * XFIOKitMoveCursor
+ * Move the cursor. This is a noop for a kernel or hardware cursor.
+ */
+static void
+XFIOKitMoveCursor(
+    ScreenPtr   pScreen,
+    int         x,
+    int         y)
+{
+    XFIOKitCursorScreenPtr ScreenPriv = CURSOR_PRIV(pScreen);
+
+    // only the X cursor needs to be explicitly moved
+    if (!ScreenPriv->cursorMode)
+        (*ScreenPriv->spriteFuncs->MoveCursor)(pScreen, x, y);
+}
+
+static miPointerSpriteFuncRec darwinSpriteFuncsRec = {
+    XFIOKitRealizeCursor,
+    XFIOKitUnrealizeCursor,
+    XFIOKitSetCursor,
+    XFIOKitMoveCursor
+};
+
+
+/*
+===========================================================================
+
+ Pointer screen functions
+
+===========================================================================
+*/
+
+/*
+ * XFIOKitCursorOffScreen
+ */
+static Bool XFIOKitCursorOffScreen(ScreenPtr *pScreen, int *x, int *y)
+{	return FALSE;
+}
+
+
+/*
+ * XFIOKitCrossScreen
+ */
+static void XFIOKitCrossScreen(ScreenPtr pScreen, Bool entering)
+{	return;
+}
+
+
+/*
+ * XFIOKitWarpCursor
+ * Change the cursor position without generating an event or motion history
+ */
+static void
+XFIOKitWarpCursor(
+    ScreenPtr               pScreen,
+    int                     x,
+    int                     y)
+{
+    kern_return_t           kr;
+
+    kr = IOHIDSetMouseLocation( xfIOKitInputConnect, x, y );
+    if (kr != KERN_SUCCESS) {
+        ErrorF("Could not set cursor position with kernel return 0x%x.\n", kr);
+    }
+    miPointerWarpCursor(pScreen, x, y);
+}
+
+static miPointerScreenFuncRec darwinScreenFuncsRec = {
+  XFIOKitCursorOffScreen,
+  XFIOKitCrossScreen,
+  XFIOKitWarpCursor,
+  DarwinEQPointerPost,
+  DarwinEQSwitchScreen
+};
+
+
+/*
+===========================================================================
+
+ Other screen functions
+
+===========================================================================
+*/
+
+/*
+ * XFIOKitCursorQueryBestSize
+ * Handle queries for best cursor size
+ */
+static void
+XFIOKitCursorQueryBestSize(
+   int              class, 
+   unsigned short   *width,
+   unsigned short   *height,
+   ScreenPtr        pScreen)
+{
+    XFIOKitCursorScreenPtr ScreenPriv = CURSOR_PRIV(pScreen);
+
+    if (class == CursorShape) {
+        *width = CURSORWIDTH;
+        *height = CURSORHEIGHT;
+    } else
+        (*ScreenPriv->QueryBestSize)(class, width, height, pScreen);
+}
+
+
+/*
+ * XFIOKitInitCursor
+ * Initialize cursor support
+ */
+Bool 
+XFIOKitInitCursor(
+    ScreenPtr	pScreen)
+{
+    XFIOKitScreenPtr        iokitScreen = XFIOKIT_SCREEN_PRIV(pScreen);
+    XFIOKitCursorScreenPtr  ScreenPriv;
+    miPointerScreenPtr	    PointPriv;
+    kern_return_t           kr;
+
+    // start with no cursor displayed
+    if (!iokitScreen->cursorShmem->cursorShow++) {
+        if (iokitScreen->cursorShmem->hardwareCursorActive) {
+            kr = IOFBSetCursorVisible(iokitScreen->fbService, FALSE);
+            kern_assert( kr );
+        }
+    }
+
+    // initialize software cursor handling (always needed as backup)
+    if (!miDCInitialize(pScreen, &darwinScreenFuncsRec)) {
+        return FALSE;
+    }
+
+    // allocate private storage for this screen's hardware cursor info
+    if (darwinCursorGeneration != serverGeneration) {
+        if ((darwinCursorScreenIndex = AllocateScreenPrivateIndex()) < 0)
+            return FALSE;
+        darwinCursorGeneration = serverGeneration; 	
+    }
+
+    ScreenPriv = xcalloc( 1, sizeof(XFIOKitCursorScreenRec) );
+    if (!ScreenPriv) return FALSE;
+
+    pScreen->devPrivates[darwinCursorScreenIndex].ptr = (pointer) ScreenPriv;
+
+    // check if a hardware cursor is supported
+    if (!iokitScreen->cursorShmem->hardwareCursorCapable) {
+        ScreenPriv->canHWCursor = FALSE;
+        ErrorF("Hardware cursor not supported.\n");
+    } else {
+        // we need to make sure that the hardware cursor really works
+        ScreenPriv->canHWCursor = TRUE;
+        kr = IOFBSetNewCursor(iokitScreen->fbService, 0, 0, 0);
+        if (kr != KERN_SUCCESS) {
+            ErrorF("Could not set hardware cursor with kernel return 0x%x.\n", kr);
+            ScreenPriv->canHWCursor = FALSE;
+        }
+        kr = IOFBSetCursorVisible(iokitScreen->fbService, TRUE);
+        if (kr != KERN_SUCCESS) {
+            ErrorF("Couldn't set hardware cursor visible with kernel return 0x%x.\n", kr);
+            ScreenPriv->canHWCursor = FALSE;
+        }
+        IOFBSetCursorVisible(iokitScreen->fbService, FALSE);
+    }
+
+    ScreenPriv->cursorMode = 0;
+    ScreenPriv->pInstalledMap = NULL;
+
+    // override some screen procedures
+    ScreenPriv->QueryBestSize = pScreen->QueryBestSize;
+    pScreen->QueryBestSize = XFIOKitCursorQueryBestSize;
+//    ScreenPriv->ConstrainCursor = pScreen->ConstrainCursor;
+//    pScreen->ConstrainCursor = XFIOKitConstrainCursor;
+
+    // initialize hardware cursor handling
+    PointPriv = (miPointerScreenPtr)
+                    pScreen->devPrivates[miPointerScreenIndex].ptr;
+
+    ScreenPriv->spriteFuncs = PointPriv->spriteFuncs;
+    PointPriv->spriteFuncs = &darwinSpriteFuncsRec; 
+
+    /* Other routines that might be overridden */
+/*
+    CursorLimitsProcPtr		CursorLimits;
+    RecolorCursorProcPtr	RecolorCursor;
+*/
+
+    return TRUE;
+}