fix typos

Credits go to the authors of 'codespell'.

4 files changed, 6 insertions, 6 deletions

diff --git a/examples/example_optimize_png.cpp b/examples/example_optimize_png.cpp
index ecf25cf..d64c7f2 100644
--- a/examples/example_optimize_png.cpp
+++ b/examples/example_optimize_png.cpp
@@ -25,7 +25,7 @@ freely, subject to the following restrictions:
 
 /*
 This example saves the PNG with the best compression LodePNG can do, and with
-unnecesary chunks removed. It tries out several combinations of settings and
+unnecessary chunks removed. It tries out several combinations of settings and
 keeps the smallest one.
 
 NOTE: This is not as good as a true PNG optimizer like optipng or pngcrush.
diff --git a/lodepng.cpp b/lodepng.cpp
index fbcecb5..643bfd5 100644
--- a/lodepng.cpp
+++ b/lodepng.cpp
@@ -4097,7 +4097,7 @@ static unsigned postProcessScanlines(unsigned char* out, unsigned char* in,
       CERROR_TRY_RETURN(unfilter(in, in, w, h, bpp));
       removePaddingBits(out, in, w * bpp, ((w * bpp + 7) / 8) * 8, h);
     }
-    /*we can immediatly filter into the out buffer, no other steps needed*/
+    /*we can immediately filter into the out buffer, no other steps needed*/
     else CERROR_TRY_RETURN(unfilter(out, in, w, h, bpp));
   }
   else /*interlace_method is 1 (Adam7)*/
@@ -5456,7 +5456,7 @@ static unsigned preProcessScanlines(unsigned char** out, size_t* outsize, const
       }
       else
       {
-        /*we can immediatly filter into the out buffer, no other steps needed*/
+        /*we can immediately filter into the out buffer, no other steps needed*/
         error = filter(*out, in, w, h, &info_png->color, settings);
       }
     }
diff --git a/lodepng.h b/lodepng.h
index b37c279..86e56a3 100644
--- a/lodepng.h
+++ b/lodepng.h
@@ -540,7 +540,7 @@ typedef enum LodePNGFilterStrategy
 {
   /*every filter at zero*/
   LFS_ZERO,
-  /*Use filter that gives minumum sum, as described in the official PNG filter heuristic.*/
+  /*Use filter that gives minimum sum, as described in the official PNG filter heuristic.*/
   LFS_MINSUM,
   /*Use the filter type that gives smallest Shannon entropy for this scanline. Depending
   on the image, this is better or worse than minsum.*/
@@ -1589,7 +1589,7 @@ symbol.
 *) 22 apr 2012 (!): Made interface more consistent, renaming a lot. Removed
     redundant C++ codec classes. Reduced amount of structs. Everything changed,
     but it is cleaner now imho and functionality remains the same. Also fixed
-    several bugs and shrinked the implementation code. Made new samples.
+    several bugs and shrunk the implementation code. Made new samples.
 *) 6 nov 2011 (!): By default, the encoder now automatically chooses the best
     PNG color model and bit depth, based on the amount and type of colors of the
     raw image. For this, autoLeaveOutAlphaChannel replaced by auto_choose_color.
diff --git a/pngdetail.cpp b/pngdetail.cpp
index e812a42..af958f7 100644
--- a/pngdetail.cpp
+++ b/pngdetail.cpp
@@ -63,7 +63,7 @@ struct Options
   bool show_filters; //show the PNG filter of each scanline (not supported for interlaced PNGs currently)
   bool zlib_info; //show basic zlib info
   bool zlib_blocks; //show type, tree info, code length summaries and sizes for each zlib block
-  bool zlib_counts; //in addition to the zlib_blocks info, show counts of occurances all symbols
+  bool zlib_counts; //in addition to the zlib_blocks info, show counts of occurrences all symbols
   bool zlib_full; //in addition to the zlib_blocks info, show all symbols, one per line (huge output)
   bool use_hex; //show some sizes or positions in hexadecimal