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, 276 insertions, 0 deletions

diff --git a/NxWidgets/libnxwidgets/src/cnxfont.cxx b/NxWidgets/libnxwidgets/src/cnxfont.cxx
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+++ b/NxWidgets/libnxwidgets/src/cnxfont.cxx
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+/****************************************************************************
+ * NxWidgets/libnxwidgets/src/cnxfont.cxx
+ *
+ *   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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+ 
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <cstring>
+
+#include <nuttx/nx/nxglib.h>
+#include <nuttx/nx/nxfonts.h>
+
+#include "nxconfig.hxx"
+#include "cnxstring.hxx"
+#include "cstringiterator.hxx"
+#include "cnxfont.hxx"
+#include "cbitmap.hxx"
+
+/****************************************************************************
+ * Pre-Processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * CNxFont Method Implementations
+ ****************************************************************************/
+
+using namespace NXWidgets;
+
+/**
+ * CNxFont Constructor.
+ *
+ * @param fontid The font ID to use.
+ * @param fontColor The font color to use.
+ * @param transparentColor The color in the font bitmap used as the
+ *    background color.
+ */
+
+CNxFont::CNxFont(enum nx_fontid_e fontid, nxgl_mxpixel_t fontColor,
+                 nxgl_mxpixel_t transparentColor)
+{
+  m_fontId           = fontid;
+  m_fontHandle       = nxf_getfonthandle(fontid);
+  m_pFontSet         = nxf_getfontset(m_fontHandle);
+  m_fontColor        = fontColor;
+  m_transparentColor = transparentColor;
+}
+
+/**
+ * Checks if supplied character is blank in the current font.
+ *
+ * @param letter The character to check.
+ * @return True if the glyph contains any pixels to be drawn.  False if
+ *   the glyph is blank.
+ */
+
+const bool CNxFont::isCharBlank(const nxwidget_char_t letter) const
+{
+  FAR const struct nx_fontbitmap_s *fbm;
+
+  /* Get the bitmap associated with the character */
+
+  fbm = nxf_getbitmap(m_fontHandle, (uint16_t)letter);
+  return (fbm == NULL);
+}
+
+/**
+ * Draw an individual character of the font to the specified bitmap.
+ *
+ * @param bitmap The bitmap to draw use. The caller should use
+ *   the getFontMetrics method to assure that the buffer will hold
+ *   the font.
+ * @param letter The character to output.
+ *
+ * @return The width of the string in pixels.
+ */
+
+void CNxFont::drawChar(FAR SBitmap *bitmap, nxwidget_char_t letter)
+{
+  // Get the NX bitmap associated with the font
+
+  FAR const struct nx_fontbitmap_s *fbm;
+  fbm = nxf_getbitmap(m_fontHandle, letter);
+  if (fbm)
+    {
+      // Get information about the font bitmap
+
+      uint8_t fwidth  = fbm->metric.width + fbm->metric.xoffset;
+      uint8_t fheight = fbm->metric.height + fbm->metric.yoffset;
+      uint8_t fstride = (fwidth * bitmap->bpp + 7) >> 3;
+
+      // Then render the glyph into the bitmap memory
+
+      (void)FONT_RENDERER((FAR nxgl_mxpixel_t*)bitmap->data, fheight,
+                          fwidth, fstride, fbm, m_fontColor);
+    }
+}
+
+/**
+ * Get the width of a string in pixels when drawn with this font.
+ *
+ * @param text The string to check.
+ * @return The width of the string in pixels.
+ */
+
+nxgl_coord_t CNxFont::getStringWidth(const CNxString &text) const
+{
+  CStringIterator *iter = text.newStringIterator();
+
+  // Get the width of the string of characters
+  // Move to the first character
+
+  unsigned int width = 0;
+  if (iter->moveToFirst())
+    {
+      // moveToFirst returns true if there is at least one character
+  
+      do
+        {
+          // Add the width of the font bitmap for this character and
+          // move the the next character
+
+          nxwidget_char_t ch = iter->getChar();
+          
+          width += getCharWidth(ch);
+        }
+      while (iter->moveToNext());
+    }
+
+  // Return the total width
+
+  delete iter;
+  return width;
+}
+
+/**
+ * Get the width of a portion of a string in pixels when drawn with this
+ * font.
+ *
+ * @param text The string to check.
+ * @param startIndex The start point of the substring within the string.
+ * @param length The length of the substring in chars.
+ * @return The width of the substring in pixels.
+ */
+ 
+nxgl_coord_t CNxFont::getStringWidth(const CNxString &text,
+                                     int startIndex, int length) const
+{
+  CStringIterator *iter = text.newStringIterator();
+
+  // Get the width of the string of characters
+
+  iter->moveTo(startIndex);
+  unsigned int width = 0;
+
+  while (length-- > 0)
+    {
+      // Add the width of the font bitmap for this character
+
+      nxwidget_char_t ch = iter->getChar();
+      width += getCharWidth(ch);
+
+      // Position to the next character in the string
+
+      if (!iter->moveToNext())
+        {
+          break;
+        }
+    }
+
+  // Return the total width
+
+  delete iter;
+  return width;
+}
+
+/**
+ * Gets font metrics for a particular character
+ *
+ * @param letter The character to get the width of.
+ * @param metrics The location to return the font metrics
+ */
+
+void CNxFont::getCharMetrics(nxwidget_char_t letter,
+                             FAR struct nx_fontmetric_s *metrics) const
+{
+  FAR const struct nx_fontbitmap_s *fbm;
+
+  // Get the font bitmap for this character
+
+  fbm = nxf_getbitmap(m_fontHandle, letter);
+  if (fbm)
+    {
+      // Return the metrics of the font
+
+      memcpy(metrics, &fbm->metric, sizeof(struct nx_fontmetric_s));
+    }
+  else
+    {
+      // Use the metrics of a space which has no width and no height
+      // but an xoffset equal to the standard width of a space.
+
+      metrics->stride  = (m_pFontSet->spwidth * CONFIG_NXWIDGETS_BPP + 7) >> 3;
+      metrics->width   = 0;
+      metrics->height  = 0;
+      metrics->xoffset = m_pFontSet->spwidth;
+      metrics->yoffset = 0;
+    }
+}
+
+/**
+ * Get the width of an individual character.
+ *
+ * @param letter The character to get the width of.
+ * @return The width of the character in pixels.
+ */
+
+nxgl_coord_t CNxFont::getCharWidth(nxwidget_char_t letter) const
+{
+  FAR const struct nx_fontbitmap_s *fbm;
+  nxgl_coord_t width;
+
+  /* Get the font bitmap for this character */
+
+  fbm = nxf_getbitmap(m_fontHandle, letter);
+  if (fbm)
+    {
+      /* Return the width of the font -- including the X offset */
+
+      width = fbm->metric.width + fbm->metric.xoffset;
+    }
+  else
+    {
+      /* Use the width of a space */
+
+     width = m_pFontSet->spwidth;
+    }
+
+  return width;
+}