Add logic to set individual pixels

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4047 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 158 insertions, 0 deletions

diff --git a/nuttx/graphics/nxbe/nxbe_setpixel.c b/nuttx/graphics/nxbe/nxbe_setpixel.c
new file mode 100644
index 000000000..d333b9b76
--- /dev/null
+++ b/nuttx/graphics/nxbe/nxbe_setpixel.c
@@ -0,0 +1,158 @@
+/****************************************************************************
+ * graphics/nxbe/nxbe_setpixel.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 <nuttx/nx/nxglib.h>
+
+#include "nxbe.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct nxbe_setpixel_s
+{
+  struct nxbe_clipops_s cops;
+  nxgl_mxpixel_t color;
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxbe_clipfill
+ *
+ * Description:
+ *  Called from nxbe_clipper() to performed the fill operation on visible portions
+ *  of the rectangle.
+ *
+ ****************************************************************************/
+
+static void nxbe_clipfill(FAR struct nxbe_clipops_s *cops,
+                          FAR struct nxbe_plane_s *plane,
+                          FAR const struct nxgl_rect_s *rect)
+{
+  struct nxbe_setpixel_s *fillinfo = (struct nxbe_setpixel_s *)cops;
+  plane->setpixel(&plane->pinfo, &rect->pt1, fillinfo->color);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxbe_fill
+ *
+ * Description:
+ *  Fill the specified rectangle in the window with the specified color
+ *
+ * Input Parameters:
+ *   wnd  - The window structure reference
+ *   rect - The location to be filled
+ *   col  - The color to use in the fill
+ *
+ * Return:
+ *   None
+ *
+ ****************************************************************************/
+
+void nxbe_setpixel(FAR struct nxbe_window_s *wnd,
+               FAR const struct nxgl_point_s *pos,
+               nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
+{
+  struct nxbe_setpixel_s info;
+  struct nxgl_rect_s rect;
+  int i;
+
+#ifdef CONFIG_DEBUG
+  if (!wnd || !pos)
+    {
+      return;
+    }
+#endif
+
+  /* Offset the position by the window origin */
+
+  nxgl_vectoradd(&rect.pt1, pos, &wnd->bounds.pt1);
+
+  /* Make sure that the point is within the limits of the window
+   * and of the background screen
+   */
+
+  if (!nxgl_rectinside(&wnd->bounds, &rect.pt1) ||
+      !nxgl_rectinside(&wnd->be->bkgd.bounds, &rect.pt1))
+    {
+      return;
+    }
+
+  /* Then create a bounding box and render the point if there it
+   * is exposed.
+   */
+
+  rect.pt2.x = rect.pt1.x;
+  rect.pt2.y = rect.pt1.y;
+ 
+#if CONFIG_NX_NPLANES > 1
+  for (i = 0; i < wnd->be->vinfo.nplanes; i++)
+#else
+  i = 0;
+#endif
+    {
+      info.cops.visible  = nxbe_clipfill;
+      info.cops.obscured = nxbe_clipnull;
+      info.color         = color[i];
+
+      nxbe_clipper(wnd->above, &rect, NX_CLIPORDER_DEFAULT,
+                   &info.cops, &wnd->be->plane[i]);
+    }
+}