xfree86: re-enable hardware cursor (for a single cursor)

This commit enables HW rendering for cursors again, but only for a single
cursor. Other cursors can be created, however they will not be visible.

hw/xfree86/ramdac/xf86Cursor.c

@@ -26,12 +26,18 @@ static Bool xf86CursorRealizeCursor(DeviceIntPtr, ScreenPtr, CursorPtr);
 static Bool xf86CursorUnrealizeCursor(DeviceIntPtr, ScreenPtr, CursorPtr);
 static void xf86CursorSetCursor(DeviceIntPtr, ScreenPtr, CursorPtr, int, int);
 static void xf86CursorMoveCursor(DeviceIntPtr, ScreenPtr, int, int);
+static Bool xf86DeviceCursorInitialize(DeviceIntPtr, ScreenPtr);
+static void xf86DeviceCursorCleanup(DeviceIntPtr, ScreenPtr);
+static void xf86DeviceCursorUndisplay(DeviceIntPtr, ScreenPtr);
 
 static miPointerSpriteFuncRec xf86CursorSpriteFuncs = {
    xf86CursorRealizeCursor,
    xf86CursorUnrealizeCursor,
    xf86CursorSetCursor,
-   xf86CursorMoveCursor
+   xf86CursorMoveCursor,
+   xf86DeviceCursorInitialize,
+   xf86DeviceCursorCleanup,
+   xf86DeviceCursorUndisplay
 };
 
 /* Screen functions */
@@ -420,3 +426,43 @@ xf86DestroyCursorInfoRec(xf86CursorInfoPtr infoPtr)
 {
     xfree(infoPtr);
 }
+
+/**
+ * New cursor has been created. Do your initalizations here.
+ */
+static Bool
+xf86DeviceCursorInitialize(DeviceIntPtr pDev, ScreenPtr pScreen)
+{
+    xf86CursorScreenPtr ScreenPriv = (xf86CursorScreenPtr)dixLookupPrivate(
+            &pScreen->devPrivates, xf86CursorScreenKey);
+
+    /* Init SW cursor */
+    return (*ScreenPriv->spriteFuncs->DeviceCursorInitialize)(pDev, pScreen);
+}
+
+/**
+ * Cursor has been removed. Clean up after yourself.
+ */
+static void
+xf86DeviceCursorCleanup(DeviceIntPtr pDev, ScreenPtr pScreen)
+{
+    xf86CursorScreenPtr ScreenPriv = (xf86CursorScreenPtr)dixLookupPrivate(
+            &pScreen->devPrivates, xf86CursorScreenKey);
+
+    /* Clean up SW cursor */
+    (*ScreenPriv->spriteFuncs->DeviceCursorCleanup)(pDev, pScreen);
+}
+
+/**
+ * Called on server shutdown to remove all cursors from the screen before
+ * bringing the server down.
+ */
+static void
+xf86DeviceCursorUndisplay(DeviceIntPtr pDev, ScreenPtr pScreen)
+{
+    xf86CursorScreenPtr ScreenPriv = (xf86CursorScreenPtr)dixLookupPrivate(
+            &pScreen->devPrivates, xf86CursorScreenKey);
+
+    /* Undisplay SW cursor */
+    (*ScreenPriv->spriteFuncs->UndisplayCursor)(pDev, pScreen);
+}

hw/xfree86/ramdac/xf86HWCurs.c

@@ -73,10 +73,6 @@ static unsigned char* RealizeCursorInterleave64(xf86CursorInfoPtr, CursorPtr);
 Bool
 xf86InitHardwareCursor(ScreenPtr pScreen, xf86CursorInfoPtr infoPtr)
 {
-    /* Graphics cards cannot render multiple cursors in hardware. We have to
-       software render them. */
-    return FALSE;
-
     if ((infoPtr->MaxWidth <= 0) || (infoPtr->MaxHeight <= 0))
 	return FALSE;