First check-in of NxWidgets

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4505 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 414 insertions, 0 deletions

diff --git a/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx b/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx
new file mode 100644
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+++ b/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx
@@ -0,0 +1,414 @@
+/****************************************************************************
+ * NxWidgets/libnxwidgets/src/crlepalettebitmap.hxx
+ *
+ *   Copyright (C) 2012 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, NxWidgets, nor the names of its contributors
+ *    me 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.
+ *
+ ****************************************************************************
+ *
+ * Portions of this package derive from Woopsi (http://woopsi.org/) and
+ * portions are original efforts.  It is difficult to determine at this
+ * point what parts are original efforts and which parts derive from Woopsi.
+ * However, in any event, the work of  Antony Dzeryn will be acknowledged
+ * in most NxWidget files.  Thanks Antony!
+ *
+ *   Copyright (c) 2007-2011, Antony Dzeryn
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * 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.
+ * * Neither the names "Woopsi", "Simian Zombie" 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 Antony Dzeryn ``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 Antony Dzeryn 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 <stdbool.h>
+#include <cstring>
+
+#include <nuttx/nx/nxglib.h>
+
+#include "nxconfig.hxx"
+#include "crlepalettebitmap.hxx"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Method Implementations
+ ****************************************************************************/
+
+using namespace NXWidgets;
+
+/**
+ * Constructor.
+ *
+ * @param bitmap The bitmap structure being wrapped.
+ */
+
+CRlePaletteBitmap::CRlePaletteBitmap(const struct SRlePaletteBitmap *bitmap)
+{
+  m_bitmap      = bitmap;
+  startOfImage();
+}
+
+/**
+ * Get the bitmap's color format.
+ *
+ * @return The bitmap's width.
+ */
+
+const uint8_t CRlePaletteBitmap::getColorFormat(void) const
+{
+  return m_bitmap->fmt;
+}
+
+/**
+ * Get the bitmap's color format.
+ *
+ * @return The bitmap's color format.
+ */
+
+const uint8_t CRlePaletteBitmap::getBitsPerPixel(void) const
+{
+  return m_bitmap->bpp;
+}
+
+/**
+ * Get the bitmap's width (in pixels/columns).
+ *
+ * @return The bitmap's pixel depth.
+ */
+
+const nxgl_coord_t CRlePaletteBitmap::getWidth(void) const
+{
+  return m_bitmap->width;
+}
+
+/**
+ * Get the bitmap's height (in rows).
+ *
+ * @return The bitmap's height.
+ */
+
+const nxgl_coord_t CRlePaletteBitmap::getHeight(void) const
+{
+  return m_bitmap->height;
+}
+
+/**
+ * Get the bitmap's width (in bytes).
+ *
+ * @return The bitmap's width.
+ */
+
+const nxgl_coord_t CRlePaletteBitmap::getStride(void) const
+{
+  // This only works if the bpp is an even multiple of 8-bit bytes
+
+  return (m_bitmap->width * m_bitmap->bpp) >> 3;
+}
+
+/**
+ * Get one row from the bit map image.
+ *
+ * @param x The offset into the row to get
+ * @param y The row number to get
+ * @param width The number of pixels to get from the row
+ * @param data The memory location provided by the caller
+ *   in which to return the data.  This should be at least
+ *   (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
+ *   and properly aligned for the pixel color format.
+ * @param True if the run was returned successfully.
+ */
+
+bool CRlePaletteBitmap::getRun(nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width,
+                               FAR void *data)
+{
+  // Check ranges.  Casts to unsigned int are ugly but permit one-sided comparisons
+
+  if (((unsigned int)x           <  (unsigned int)width) &&
+      ((unsigned int)(x + width) <= (unsigned int)m_bitmap->width))
+    {
+      // Seek to the requested row
+
+      if (!seekRow(y))
+        {
+          return false;
+        }
+
+      // Offset to the starting X position
+
+      if (x > 0)
+        {
+          if (!skipPixels(x))
+            {
+              return false;
+            }
+        }
+
+      // Then copy the requested number of pixels
+
+      return copyPixels(width, data);
+    }
+
+  return false;
+}
+
+/**
+ * Reset to the beginning of the image
+ */
+
+void CRlePaletteBitmap::startOfImage(void)
+{
+  m_row         = 0;
+  m_col         = 0;
+  m_rle         = &m_bitmap->data[0];
+  m_remaining   = m_rle->npixels;
+}
+
+/**
+ * Advance position data ahead.  Called after npixels have
+ * have been consume.
+ *
+ * @param npixels The number of pixels to advance
+ * @return False if this goes beyond the end of the image
+ */
+
+bool CRlePaletteBitmap::advancePosition(nxgl_coord_t npixels)
+{
+  int newcol = m_col + npixels;
+
+  while (newcol >= m_bitmap->width)
+    {
+      newcol -= m_bitmap->width;
+      if (++m_row >= m_bitmap->height)
+        {
+          return false;
+        }
+    }
+
+  m_col = newcol;
+  return true;
+}
+
+/**
+ * Seek ahead the specific number of pixels -- discarding
+ * and advancing.
+ *
+ * @param npixels The number of pixels to skip
+ */
+
+bool CRlePaletteBitmap::skipPixels(nxgl_coord_t npixels)
+{
+  do
+    {
+      // Skip values in the current RLE entry
+
+      if (m_remaining > npixels)
+        {
+          // Subtract from the number of pixels remaining
+
+          m_remaining -= npixels;
+          return advancePosition(npixels);
+        }
+
+      // Not enough (or just enough) in the current entry.  Take what we
+      // can from the current entry and move to the next entry
+
+      npixels -= m_remaining;
+      if (!advancePosition(m_remaining))
+        {
+          return false;
+        }
+
+      m_rle++;
+      m_remaining = m_rle->npixels;
+    }
+  while (npixels > 0);
+
+  return true;
+}
+ 
+/** Seek to the beginning of the next row
+ *
+ * @return False if this was the last row of the image
+ */
+
+bool CRlePaletteBitmap::nextRow(void)
+{
+  return skipPixels(m_bitmap->width - m_col);
+}
+
+/** Seek to the beignning specific row
+ *
+ * @param row The row number to seek to
+ * @return False if this goes beyond the end of the image
+ */
+
+bool CRlePaletteBitmap::seekRow(nxgl_coord_t row)
+{
+  // Is the current position already past the requested position?
+
+  if (row > m_row || (row == m_row && m_col != 0))
+    {
+      // Yes.. rewind to the beginning of the image
+
+      startOfImage();
+    }
+
+  // Seek ahead, row-by-row until we are at the beginning of
+  // the requested row
+
+  while (m_row < row)
+    {
+      if (!nextRow())
+        {
+          return false;
+        }
+    }
+
+  return true;
+}
+
+/** Copy the pixels from the current RLE entry the specified number of times.
+ *
+ * @param npixels The number of pixels to copy.  Must be less than or equal
+ *  to m_remaining (not checked here, must be handled by higher level code).
+ * @param data The memory location provided by the caller
+ *   in which to return the data.  This should be at least
+ *   (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
+ *   and properly aligned for the pixel color format.
+ */
+
+void CRlePaletteBitmap::copyColor(nxgl_coord_t npixels, FAR void *data)
+{
+  // Right now, only a single pixel depth is supported
+
+  nxwidget_pixel_t *nxlut = (nxwidget_pixel_t *)m_bitmap->lut;
+  nxwidget_pixel_t color = nxlut[m_rle->lookup];
+
+  // Copy the requested pixels
+
+  FAR nxwidget_pixel_t *dest = (FAR nxwidget_pixel_t *)data;
+  for (int i = 0; i < npixels; i++)
+    {
+      *dest++ = color;
+    }
+
+  // Adjust the number of pixels remaining in the RLE entry
+
+  m_remaining -= npixels;
+}
+
+/** Copy pixels from the current position
+ *
+ * @param npixels The number of pixels to copy
+ * @param data The memory location provided by the caller
+ *   in which to return the data.  This should be at least
+ *   (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
+ *   and properly aligned for the pixel color format.
+ * @return False if this goes beyond the end of the image
+ */
+
+bool CRlePaletteBitmap::copyPixels(nxgl_coord_t npixels, FAR void *data)
+{
+  FAR nxwidget_pixel_t *ptr = (FAR nxwidget_pixel_t *)data;
+  do
+    {
+      // Get values in the current RLE entry
+
+      if (m_remaining > npixels)
+        {
+          // Copy npixels from the current RLE entry (it won't be empty)
+
+          copyColor(npixels, (FAR void *)ptr);
+
+          // Then advance row/column position information
+
+          return advancePosition(npixels);
+        }
+
+      // Not enough (or just enough) in the current entry.  Take what we
+      // can from the current entry and move to the next entry
+
+      uint8_t nTaken = m_remaining; // Temporary.. copyColor clobbers m_remaining
+      npixels -= m_remaining;       // New number of pixels needed
+
+      // Copy all of the colors available in this RLE entry
+
+      copyColor(m_remaining, (FAR void *)ptr);
+
+      // Then advance row/column position information
+
+      if (!advancePosition(nTaken))
+        {
+          return false;
+        }
+
+      // Advance the destination pointer by the number of pixels taken
+      // from the RLE entry
+
+      ptr += nTaken;
+
+      // Then move to the next RLE entry
+
+      m_rle++;
+      m_remaining = m_rle->npixels;
+    }
+  while (npixels > 0);
+
+  return true;
+}