add some assert() to make tutor happy

1 files changed, 5 insertions, 1 deletions

diff --git a/ue2/imgsynth2/cpixelformat_indexed8.cpp b/ue2/imgsynth2/cpixelformat_indexed8.cpp
index 21b0988..d92ae9f 100644
--- a/ue2/imgsynth2/cpixelformat_indexed8.cpp
+++ b/ue2/imgsynth2/cpixelformat_indexed8.cpp
@@ -6,6 +6,7 @@
  */
 
 #include <boost/numeric/conversion/cast.hpp>
+#include <assert.h>
 #include "cpixelformat_indexed8.h"
 
 using namespace std;
@@ -16,6 +17,7 @@ void CPixelFormat_Indexed8::getPixel(RGBPIXEL& pixel, uint32_t x, uint32_t y)
     throw PixelFormatError("No pixelbuffer allocated.");
   if (m_bitmap->getColorTable().size() == 0)
     return;
+  assert(m_bitmap->getPixelDataSize() > 0);
 
   uint32_t offset = y * m_bitmap->getWidth() + x;
 
@@ -40,8 +42,10 @@ void CPixelFormat_Indexed8::setPixel(const RGBPIXEL& pixel, uint32_t x, uint32_t
 {
   if (m_bitmap->getPixelData() == NULL)
     throw PixelFormatError("No pixelbuffer allocated.");
+  /* if colortable is empty there are no pixels */
   if (m_bitmap->getColorTable().size() == 0)
     return;
+  assert(m_bitmap->getPixelDataSize() > 0);
 
   uint32_t offset = y * m_bitmap->getWidth() + x;
 
@@ -60,7 +64,7 @@ void CPixelFormat_Indexed8::setPixel(const RGBPIXEL& pixel, uint32_t x, uint32_t
   }
 
   uint32_t index = (*it).first;
-  /* need to get a new character for our color */
+  /* need to get a new entry for our color */
   if (it == m_bitmap->getColorTable().end())
   {
     index = (*it).first + 1;