1 files changed, 201 insertions, 0 deletions
diff --git a/nuttx/graphics/nxglib/fb/nxglib_getrectangle.c b/nuttx/graphics/nxglib/fb/nxglib_getrectangle.c
new file mode 100644
index 000000000..82e541ec5
--- /dev/null
+++ b/nuttx/graphics/nxglib/fb/nxglib_getrectangle.c
@@ -0,0 +1,201 @@
+/****************************************************************************
+ * graphics/nxglib/fb/nxglib_getrectangle.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 <stdint.h>
+
+#include <nuttx/fb.h>
+#include <nuttx/nx/nxglib.h>
+
+#include "nxglib_bitblit.h"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxgl_lowresmemcpy
+ ****************************************************************************/
+
+#if NXGLIB_BITSPERPIXEL < 8
+static inline void nxgl_lowresmemcpy(FAR uint8_t *dline, FAR const uint8_t *sline,
+                                     unsigned int width,
+                                     uint8_t leadmask, uint8_t tailmask)
+{
+  FAR const uint8_t *sptr;
+  FAR uint8_t *dptr;
+  uint8_t mask;
+  int lnlen;
+
+  /* Handle masking of the fractional initial byte */
+
+  mask  = leadmask;
+  sptr  = sline;
+  dptr  = dline;
+  lnlen = width;
+
+  if (lnlen > 1 && mask)
+     {
+       dptr[0] = (dptr[0] & ~mask) | (sptr[0] & mask);
+       mask = 0xff;
+       dptr++;
+       sptr++;
+       lnlen--;
+     }
+
+   /* Handle masking of the fractional final byte */
+
+   mask &= tailmask;
+   if (lnlen > 0 && mask)
+     {
+       dptr[lnlen-1] = (dptr[lnlen-1] & ~mask) | (sptr[lnlen-1] & mask);
+       lnlen--;
+     }
+
+   /* Handle all of the unmasked bytes in-between */
+
+   if (lnlen > 0)
+     {
+       NXGL_MEMCPY(dptr, sptr, lnlen);
+     }
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nxgl_getrectangle_*bpp
+ *
+ * Descripton:
+ *   Fetch a rectangular region from framebuffer memory.  The source is
+ *   expressed as a rectangle.
+ *
+ ****************************************************************************/
+
+void NXGL_FUNCNAME(nxgl_getrectangle,NXGLIB_SUFFIX)
+(FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *rect,
+ FAR void *dest, unsigned int deststride)
+{
+  FAR const uint8_t *sline;
+  FAR uint8_t *dline;
+  unsigned int width;
+  unsigned int fbstride;
+  unsigned int rows;
+
+#if NXGLIB_BITSPERPIXEL < 8
+  uint8_t leadmask;
+  uint8_t tailmask;
+#endif
+
+  /* Get the width of the framebuffer in bytes */
+
+  fbstride = pinfo->stride;
+
+  /* Get the dimensions of the rectange to copy: width in pixels, height
+   * in rows
+   */
+
+  width = rect->pt2.x - rect->pt1.x + 1;
+  rows  = rect->pt2.y - rect->pt1.y + 1;
+
+#if NXGLIB_BITSPERPIXEL < 8
+# ifdef CONFIG_NX_PACKEDMSFIRST
+
+  /* Get the mask for pixels that are ordered so that they pack from the
+   * MS byte down.
+   */
+
+  leadmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x)));
+  tailmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->pt2.x-1)));
+# else
+  /* Get the mask for pixels that are ordered so that they pack from the
+   * LS byte up.
+   */
+
+  leadmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->pt1.x)));
+  tailmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x-1)));
+# endif
+#endif
+
+  /* sline = address of the first pixel in the top row of the source in
+   * framebuffer memory
+   */
+
+  sline = pinfo->fbmem + rect->pt1.y * fbstride + NXGL_SCALEX(rect->pt1.x);
+
+  /* dline = address of the first row pixel */
+
+  dline = (FAR uint8_t *)dest;
+
+  /* Yes.. Copy the rectangle */
+
+  while (rows--)
+    {
+      /* Copy the row */
+
+#if NXGLIB_BITSPERPIXEL < 8
+      nxgl_lowresmemcpy(dline, sline, width, leadmask, tailmask);
+#else
+      NXGL_MEMCPY(dline, sline, width);
+#endif
+      /* Point to the next source/dest row below the current one */
+
+      dline += deststride;
+      sline += fbstride;
+    }
+}