Fix a positioning problem in CRlePaletteBitmap

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4694 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 11 insertions, 1 deletions

diff --git a/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx b/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx
index 31e300269..4c781e2c9 100644
--- a/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx
+++ b/NxWidgets/libnxwidgets/src/crlepalettebitmap.cxx
@@ -242,12 +242,22 @@ void CRlePaletteBitmap::startOfImage(void)
 
 bool CRlePaletteBitmap::advancePosition(nxgl_coord_t npixels)
 {
+  // Advance to the next column after consuming 'npixels' on this colum
   int newcol = m_col + npixels;
 
+  // Have we consumed the entire row?
+
   while (newcol >= m_bitmap->width)
     {
+      // Advance to the next row
+
       newcol -= m_bitmap->width;
-      if (++m_row >= m_bitmap->height)
+      m_row++;
+
+      // If we still have pixels to account for but we have exceeded the
+      // the size of the bitmap, then return false
+
+      if (newcol > 0 && m_row >= m_bitmap->height)
         {
           return false;
         }