Merge pull request #26 from hadisfr/master

Some improvements

.gitignore

@@ -0,0 +1,94 @@
+###C++###
+
+# Prerequisites
+*.d
+
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+tiv
+
+
+###Java###
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+
+###Linux###
+
+*~
+
+# KDE directory preferences
+.directory
+
+
+###OSX###
+
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+
+# Thumbnails
+._*
+
+# Files that might appear on external disk
+.Spotlight-V100
+.Trashes
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk

README.md

@@ -9,9 +9,9 @@ For each 4x8 pixel cell of the (potentially downscaled) image:
 1. Find the color channel (R, G or B) that has the biggest range of values for the current cell
 2. Split this range in the middle and create a corresponding bitmap for the cell
 4. Compare the bitmap to the assumed bitmaps for various unicode block graphics characters
-5. Re-calculate the foregound and background colors for the chosen character.
+5. Re-calculate the foreground and background colors for the chosen character.
 
-See the difference by disabling this optimization using the `-0` option. Or just take a look at the comparsion image at the end of this text.
+See the difference by disabling this optimization using the `-0` option. Or just take a look at the comparison image at the end of this text.
 
 ## Installation
 
@@ -42,7 +42,7 @@ If multiple images match the filename spec, thumbnails are shown.
 
 ## Comparison to Using Half-Block Characters Only
 
-The top image was generated with the character optization diabled via the `-0` option.
+The top image was generated with the character optimization disabled via the `-0` option.
 
 ![Comparison](http://i.imgur.com/OzdCeh6.png)
 

src/main/cpp/Makefile

@@ -1,10 +1,12 @@
+CXX=g++
+
 default: tiv
 
 tiv.o: tiv.cpp CImg.h
-	g++ -std=c++17  -Wall -fpermissive -fexceptions -O2 -c tiv.cpp -o tiv.o
+	$(CXX) -std=c++17  -Wall -fpermissive -fexceptions -O2 -c tiv.cpp -o tiv.o
 
 tiv : tiv.o
-	g++ tiv.o -o tiv -lstdc++fs -pthread -s
+	$(CXX) tiv.o -o tiv -lstdc++fs -pthread -s
 
 install: tiv
 	cp tiv /usr/local/bin/tiv

src/main/cpp/tiv.cpp

@@ -362,14 +362,14 @@ void emitCodepoint(int codepoint) {
     std::cout << (char) (0x80 | ((codepoint >> 6) & 0x3f));
     std::cout << (char) (0x80 | (codepoint & 0x3f));
   } else {
-    std::cout << "ERROR";
+    std::cerr << "ERROR";
   }
 }
 
 
 void emit_image(const cimg_library::CImg<unsigned char> & image, int flags) {
-    for (int y = 0; y < image.height() - 8; y += 8) {
+    for (int y = 0; y <= image.height() - 8; y += 8) {
-      for (int x = 0; x < image.width() - 4; x += 4) {
+      for (int x = 0; x <= image.width() - 4; x += 4) {
         CharData charData = flags & FLAG_NOOPT
 	  ? getCharData(image, x, y, 0x2584, 0x0000ffff)
 	  : getCharData(image, x, y);