Revert "Persistence options"

This reverts commit aef2fbccdc.

README.md

@@ -15,7 +15,6 @@ See the difference by disabling this optimization using the `-0` option. Or just
 
 ## News
 
-- 2019-03-26: Exciting week: @Cableo has fixed output redirection, @boretom has added cross-compilation support to the build file and @AlanDeSmet has fixed tall thumbnails and greyscale images.
 - 2019-01-14: Install via snap: `sudo snap install --edge tiv`
 
 ## Installation
@@ -32,8 +31,6 @@ See the difference by disabling this optimization using the `-0` option. Or just
     make
     sudo make install
 
-Note: On MacOS, you'll need to install GCC because of this issue: https://stackoverflow.com/q/42633477. Find some more details here: https://github.com/stefanhaustein/TerminalImageViewer/issues/36
-
 ## Usage
 
     tiv [options] <filename(s)>
@@ -68,4 +65,3 @@ If multiple images match the filename spec, thumbnails are shown.
 The top image was generated with the character optimization disabled via the `-0` option.
 
 ![Comparison](https://i.imgur.com/OzdCeh6.png)
-

src/main/cpp/tiv.cpp

@@ -195,7 +195,8 @@ CharData getCharData(const cimg_library::CImg<unsigned char> & image, int x0, in
   int count2 = iter->first;
   long max_count_color_1 = iter->second;
   long max_count_color_2 = max_count_color_1;
-  if ((++iter) != color_per_count.rend()) {
+  if (iter != color_per_count.rend()) {
+    ++iter;
     count2 += iter->first;
     max_count_color_2 = iter->second;
   }
@@ -329,7 +330,7 @@ void emit_color(int flags, int r, int g, int b) {
   int gq = COLOR_STEPS[gi];
   int bq = COLOR_STEPS[bi];
   
-  int gray = static_cast<int>(std::round(r * 0.2989f + g * 0.5870f + b * 0.1140f));
+  int gray = std::round(r * 0.2989f + g * 0.5870f + b * 0.1140f);
 
   int gri = best_index(gray, GRAYSCALE_STEPS, GRAYSCALE_STEP_COUNT);
   int grq = GRAYSCALE_STEPS[gri];
@@ -439,24 +440,11 @@ cimg_library::CImg<unsigned char> load_rgb_CImg(const char * const filename) {
 }
 
 int main(int argc, char* argv[]) {
-  int maxWidth = 80;
-  int maxHeight = 24;
-  bool sizeDetectionSuccessful = true;
   struct winsize w;
-  int ioStatus = ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
-  // If redirecting STDOUT to one file ( col or row == 0, or the previous ioctl call's failed )
-  if (ioStatus != 0 || (w.ws_col | w.ws_row) == 0) {
-    ioStatus = ioctl(STDIN_FILENO, TIOCGWINSZ, &w);
-    if (ioStatus != 0 || (w.ws_col | w.ws_row) == 0) {
-      std::cerr << "Warning: failed to determine most reasonable size, defaulting to 80x24" << std::endl;
-       sizeDetectionSuccessful = false;
-    }
-  }
-  if (sizeDetectionSuccessful)
-  {
-    maxWidth = w.ws_col * 4;
-    maxHeight = w.ws_row * 8;
-  }
+  ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
+  
+  int maxWidth = w.ws_col * 4;
+  int maxHeight = w.ws_row * 8;
   int flags = 0;
   Mode mode = AUTO;
   int columns = 3;
@@ -535,7 +523,7 @@ int main(int argc, char* argv[]) {
 	std::string name = file_names[index++];
 	try {
 	  cimg_library::CImg<unsigned char> original = load_rgb_CImg(name.c_str());
-	  auto cut = name.find_last_of("/");
+	  unsigned int cut = name.find_last_of("/");
 	  sb += cut == std::string::npos ? name : name.substr(cut + 1);
 	  size newSize = size(original).fitted_within(maxThumbSize);
 	  original.resize(newSize.width, newSize.height, 1, -100, 5);
@@ -548,7 +536,7 @@ int main(int argc, char* argv[]) {
 	  // Probably no image; ignore.
 	}
       }
-      if (count) emit_image(image, flags);
+      emit_image(image, flags);
       std::cout << sb << std::endl << std::endl;
     }
   }