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Add color support to Windows console output, properly

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This adds color support to the output of the console on Windows. Now if
you're using Windows 10 build 1511 or later (I think it's build 1511
anyway; they added more VT sequence support in later versions), you will
see colors by default. This isn't due to Windows helping in any way;
this commit has to specifically enable it with SetConsoleMode() because
by default, Windows won't enable color support unless we enable it. (Or
if it's enabled in the registry, but having to go through the registry
to enable basic shit like that is completely fucking stupid.)

I tested this in my Windows 10 virtual machine and it's completely
working.
This commit is contained in:
Misa 2022-11-14 21:57:01 -08:00
parent 40dd2571c2
commit 86d90a1296
1 changed files with 50 additions and 14 deletions
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64
desktop_version/src/Vlogging.c
View file

@ -5,15 +5,8 @@
#ifdef _WIN32
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
# define STDOUT_IS_TTY 0
# define STDERR_IS_TTY 0
#elif defined(__unix__) || defined(__APPLE__)
# include <unistd.h>
# define STDOUT_IS_TTY isatty(STDOUT_FILENO)
# define STDERR_IS_TTY isatty(STDERR_FILENO)
#else
# define STDOUT_IS_TTY 0
# define STDERR_IS_TTY 0
#endif
#define COLOR(EXPR) (color_enabled && color_supported ? EXPR : "")
@ -32,13 +25,7 @@ static int info_enabled = 1;
static int warn_enabled = 1;
static int error_enabled = 1;
static void check_color_support(void)
{
if (STDOUT_IS_TTY && STDERR_IS_TTY)
{
color_supported = 1;
}
}
static void check_color_support(void);
void vlog_init(void)
{
@ -196,3 +183,52 @@ void vlog_open_console(void)
check_color_support();
}
#endif /* _WIN32 */
static void check_color_support(void)
{
#ifdef _WIN32
/* VT100 colors are supported since Windows 10 build 16257,
* but it's not enabled by default. So we have to set it. */
const HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
if (hStdout == INVALID_HANDLE_VALUE)
{
vlog_error(
"Could not set color support: GetStdHandle() failed with %d",
GetLastError()
);
return;
}
const HANDLE hStderr = GetStdHandle(STD_ERROR_HANDLE);
if (hStderr == INVALID_HANDLE_VALUE)
{
vlog_error(
"Could not enable color support: GetStdHandle() failed with %d",
GetLastError()
);
return;
}
const BOOL success = SetConsoleMode(
hStdout, ENABLE_PROCESSED_OUTPUT | ENABLE_VIRTUAL_TERMINAL_PROCESSING
);
if (!success)
{
/* Debug, not error, because it might not be an error.
* (E.g. this version of Windows doesn't support VT100 colors.) */
vlog_debug(
"Could not enable color support: SetConsoleMode() failed with %d",
GetLastError()
);
return;
}
color_supported = 1;
#elif defined(__unix__) || defined(__APPLE__)
if (isatty(STDOUT_FILENO) && isatty(STDERR_FILENO))
{
color_supported = 1;
}
#endif
}