1 files changed, 6 insertions, 2 deletions
diff --git a/src/pngenc.h b/src/pngenc.h
index c86cbce..66379cb 100644
--- a/src/pngenc.h
+++ b/src/pngenc.h
@@ -22,6 +22,7 @@
 
 typedef unsigned char  Byte;
 
+/*! \brief Entry in the color palette of a PNG image */
 struct Color
 {
   Byte red;
@@ -29,6 +30,11 @@ struct Color
   Byte blue;
 };
 
+/*! \brief PNG image encoder
+ *
+ *  This class allows to encode a raw image to a compressed PNG.
+ *  Use write() to save the result to disk.
+ */
 class PngEncoder
 {
   public:
@@ -36,8 +42,6 @@ class PngEncoder
    ~PngEncoder();
     void write(const char *fileName);
    
-  protected:
-   
   private:
     // image variables
     Byte *data;            // pointer to the image data (one byte per pixel)