[windows] Terminal background colour

[gvanem]

Hello folks, my first issue.

The function ColorPrintf() ass-u-mes that all users of this library have terminals with a black background colour. I.e. using it in Microsoft's STL library and the benchmark-std_copy.exe program, the output like like this:

Not very nice IMHO.

With my blue terminal background I'd like it to look like:

which I fixed with:

--- a/src/colorprint.cc  2022-09-10 14:58:12
+++ b/src/colorprint.cc 2022-09-10 14:54:32
@@ -136,13 +136,16 @@
   CONSOLE_SCREEN_BUFFER_INFO buffer_info;
   GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
   const WORD old_color_attrs = buffer_info.wAttributes;
+  WORD  new_attr;

   // 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);
+  new_attr = (buffer_info.wAttributes & ~7);
+  new_attr &= ~8;    // Since 'wAttributes' could have been hi-intensity at startup.
   SetConsoleTextAttribute(stdout_handle,
-                          GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
+                          new_attr | GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
   vprintf(fmt, args);

   fflush(stdout);

PS. I use JPsoft's 4NT as the shell.

System

• Win-10
• Compiler and version: MSVC ver. 19.34.31721 for x64

[dmah42]

could you create a pull request for this?

[gvanem]

I'm not very familiar with git pull request. But my attempt: https://github.com/google/benchmark/pull/1488