Merge pull request #1127 from zulkarnine/patch-1

Fix background color in ColoredPrintf

googletest/src/gtest.cc

@@ -2895,6 +2895,33 @@ WORD GetColorAttribute(GTestColor color) {
   }
 }
 
+int GetBitOffset(WORD color_mask) {
+  if (color_mask == 0) return 0;
+
+  int bitOffset = 0;
+  while((color_mask & 1) == 0) {
+    color_mask >>= 1;
+    ++bitOffset;
+  }
+  return bitOffset;
+}
+
+WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
+  // Let's reuse the BG
+  static const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN | BACKGROUND_RED | BACKGROUND_INTENSITY;
+  static const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_INTENSITY;
+  const WORD existing_bg = old_color_attrs & background_mask;
+
+  WORD new_color = GetColorAttribute(color) | existing_bg | FOREGROUND_INTENSITY;
+  static const int bg_bitOffset = GetBitOffset(background_mask);
+  static const int fg_bitOffset = GetBitOffset(foreground_mask);
+
+  if (((new_color & background_mask) >> bg_bitOffset) == ((new_color & foreground_mask) >> fg_bitOffset)) {
+    new_color ^= FOREGROUND_INTENSITY; //invert intensity
+  }
+  return new_color;
+}
+	
 #else
 
 // Returns the ANSI color code for the given color.  COLOR_DEFAULT is
@@ -2980,13 +3007,14 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
   CONSOLE_SCREEN_BUFFER_INFO buffer_info;
   GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
   const WORD old_color_attrs = buffer_info.wAttributes;
-
+  const WORD new_color = GetNewColor(color, old_color_attrs);
+  
   // We need to flush the stream buffers into the console before each
   // SetConsoleTextAttribute call lest it affect the text that is already
   // printed but has not yet reached the console.
   fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle,
-                          GetColorAttribute(color) | FOREGROUND_INTENSITY);
+  SetConsoleTextAttribute(stdout_handle, new_color);
+
   vprintf(fmt, args);
 
   fflush(stdout);