From 124c331605b174afc08f7ef498209952b4a1dbc5 Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Tue, 2 Dec 2008 19:08:19 +0000
Subject: More NXTK files

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1391 42af7a65-404d-4744-a932-0658087f49c3
---
 nuttx/graphics/nxtk/nxtk_subwindowclip.c | 116 +++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 nuttx/graphics/nxtk/nxtk_subwindowclip.c

(limited to 'nuttx/graphics/nxtk/nxtk_subwindowclip.c')

diff --git a/nuttx/graphics/nxtk/nxtk_subwindowclip.c b/nuttx/graphics/nxtk/nxtk_subwindowclip.c
new file mode 100644
index 000000000..594e7d844
--- /dev/null
+++ b/nuttx/graphics/nxtk/nxtk_subwindowclip.c
@@ -0,0 +1,116 @@
+/****************************************************************************
+ * graphics/nxtk/nxtk_subwindowclip.c
+ *
+ *   Copyright (C) 2008 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx.h>
+#include <nuttx/nxtk.h>
+
+#include "nxfe.h"
+#include "nxtk_internal.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxtk_subwindowclip
+ *
+ * Description:
+ *   Clip the src rectangle so that it lies within the sub-window bounds
+ *   then move the rectangle to that it is relative to the containing
+ *   window.
+ *
+ * Input parameters:
+ *   fwnd   - The framed window to be used
+ *   dest   - The locaton to put the result
+ *   src    - The src rectangle in relative sub-window coordinates
+ *   bounds - The subwindow bounds in absolute screen coordinates.
+ *
+ * Returned value:
+ *   None
+ *
+ ****************************************************************************/
+
+void nxtk_subwindowclip(FAR struct nxtk_framedwindow_s *fwnd,
+                        FAR struct nxgl_rect_s *dest,
+                        FAR const struct nxgl_rect_s *src,
+                        FAR const struct nxgl_rect_s *bounds)
+{
+  struct nxgl_rect_s tmp;
+
+  /* Temporarily, position the src rectangle in absolute screen coordinates */
+
+  nxgl_rectoffset(&tmp, dest, bounds->pt1.x, bounds->pt1.y);
+
+  /* Clip the dest rectangle to lie within the client window region */
+
+  nxgl_rectintersect(&tmp, &tmp, bounds);
+
+  /* Then move the rectangle so that is relative to the containing window, not the
+   * client subwindow
+   */
+
+  nxgl_rectoffset(dest, &tmp, -fwnd->wnd.bounds.pt1.x, -fwnd->wnd.bounds.pt1.y);
+}
-- 
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