Add logic to read from graphics memory

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4057 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 122 insertions, 0 deletions

diff --git a/nuttx/graphics/nxtk/nxtk_gettoolbar.c b/nuttx/graphics/nxtk/nxtk_gettoolbar.c
new file mode 100644
index 000000000..7d2b11840
--- /dev/null
+++ b/nuttx/graphics/nxtk/nxtk_gettoolbar.c
@@ -0,0 +1,122 @@
+/****************************************************************************
+ * graphics/nxtk/nxtk_gettoolbar.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 <stdlib.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx/nx.h>
+#include <nuttx/nx/nxtk.h>
+
+#include "nxfe.h"
+#include "nxtk_internal.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxtk_gettoolbar
+ *
+ * Description:
+ *  Get the raw contents of graphic memory within a rectangular region. NOTE:
+ *  Since raw graphic memory is returned, the returned memory content may be
+ *  the memory of windows above this one and may not necessarily belong to
+ *  this window unless you assure that this is the top window.
+ *
+ * Input Parameters:
+ *   wnd  - The window structure reference
+ *   rect - The location to be copied
+ *   plane - Specifies the color plane to get from.
+ *   dest - The location to copy the memory region
+ *   deststride - The width, in bytes, the the dest memory
+ *
+ * Return:
+ *   OK on success; ERROR on failure with errno set appropriately
+ *
+ ****************************************************************************/
+
+void nxtk_gettoolbar(NXTKWINDOW hfwnd, FAR const struct nxgl_rect_s *rect,
+                     unsigned int plane, FAR uint8_t *dest,
+                     unsigned int deststride)
+{
+  FAR struct nxtk_framedwindow_s *fwnd = (FAR struct nxtk_framedwindow_s *)hfwnd;
+  struct nxgl_rect_s getrect;
+
+#ifdef CONFIG_DEBUG
+  if (!hwnd || !rect || !dest)
+    {
+      errno = EINVAL;
+      return ERROR;
+    }
+#endif
+
+  /* Clip the rectangle so that it lies within the sub-window bounds
+   * then move the rectangle to that it is relative to the containing
+   * window.
+   */
+
+  nxtk_subwindowclip(fwnd, &getrect, rect, &fwnd->tbrect);
+
+  /* Then get it */
+
+  return nx_getrectangle((NXWINDOW)hfwnd, &getrect, plane, dest, deststride);
+}