Add Distributed Multihead X (DMX) support

1 files changed, 68 insertions, 0 deletions

diff --git a/hw/dmx/dmxshadow.c b/hw/dmx/dmxshadow.c
new file mode 100644
index 000000000..f295da992
--- /dev/null
+++ b/hw/dmx/dmxshadow.c
@@ -0,0 +1,68 @@
+/* $XFree86$ */
+/*
+ * Copyright 2001 Red Hat Inc., Durham, North Carolina.
+ *
+ * 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 on 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 (including the
+ * next paragraph) 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
+ * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
+ * 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.
+ */
+
+/*
+ * Authors:
+ *   Kevin E. Martin <kem@redhat.com>
+ *   David H. Dawes <dawes@xfree86.org>
+ *
+ */
+
+#include "dmx.h"
+#include "dmxsync.h"
+#include "dmxshadow.h"
+
+/** \file
+ * This file provides support for the shadow frame buffer. */
+
+/** Update the screen from the shadow frame buffer. */
+void dmxShadowUpdateProc(ScreenPtr pScreen, shadowBufPtr pBuf)
+{
+    RegionPtr      damage = &pBuf->damage;
+    int            nbox = REGION_NUM_RECTS(damage);
+    BoxPtr         pbox = REGION_RECTS(damage);
+    DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
+
+    if (!dmxScreen->beDisplay)
+	return;
+
+    while (nbox--) {
+	XPutImage(dmxScreen->beDisplay,
+		  dmxScreen->scrnWin,
+		  dmxScreen->shadowGC,
+		  dmxScreen->shadowFBImage,
+		  pbox->x1, pbox->y1,
+		  pbox->x1, pbox->y1,
+		  pbox->x2 - pbox->x1,
+		  pbox->y2 - pbox->y1);
+
+	pbox++;
+    }
+
+    dmxSync(dmxScreen, FALSE);
+}