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avutil/log: add support for forced ANSI colors on win32 

To make behavior the same as non-win32 code when the standard error is
redirected. Also restructure the code a bit.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2020-01-29 00:30:06 +01:00
parent 1b34c0690f
commit 31acaa1ec6
1 changed files with 29 additions and 16 deletions
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35
libavutil/log.c
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@ -122,28 +122,37 @@ static int use_color = -1;
static void check_color_terminal(void)
{
char *term = getenv("TERM");
#if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
CONSOLE_SCREEN_BUFFER_INFO con_info;
DWORD dummy;
con = GetStdHandle(STD_ERROR_HANDLE);
if (con != INVALID_HANDLE_VALUE && !GetConsoleMode(con, &dummy))
con = INVALID_HANDLE_VALUE;
use_color = (con != INVALID_HANDLE_VALUE) && !getenv("AV_LOG_FORCE_NOCOLOR");
if (use_color) {
if (con != INVALID_HANDLE_VALUE) {
GetConsoleScreenBufferInfo(con, &con_info);
attr_orig = con_info.wAttributes;
background = attr_orig & 0xF0;
}
#elif HAVE_ISATTY
char *term = getenv("TERM");
use_color = !getenv("AV_LOG_FORCE_NOCOLOR") &&
(getenv("TERM") && isatty(2) || getenv("AV_LOG_FORCE_COLOR"));
if ( getenv("AV_LOG_FORCE_256COLOR")
|| (term && strstr(term, "256color")))
use_color *= 256;
#else
use_color = getenv("AV_LOG_FORCE_COLOR") && !getenv("AV_LOG_FORCE_NOCOLOR");
#endif
if (getenv("AV_LOG_FORCE_NOCOLOR")) {
use_color = 0;
} else if (getenv("AV_LOG_FORCE_COLOR")) {
use_color = 1;
} else {
#if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
use_color = (con != INVALID_HANDLE_VALUE);
#elif HAVE_ISATTY
use_color = (term && isatty(2));
#else
use_color = 0;
#endif
}
if (getenv("AV_LOG_FORCE_256COLOR") || term && strstr(term, "256color"))
use_color *= 256;
}
static void ansi_fputs(int level, int tint, const char *str, int local_use_color)
@ -183,11 +192,15 @@ static void colored_fputs(int level, int tint, const char *str)
else local_use_color = use_color;
#if defined(_WIN32) && HAVE_SETCONSOLETEXTATTRIBUTE && HAVE_GETSTDHANDLE
if (con != INVALID_HANDLE_VALUE) {
if (local_use_color)
SetConsoleTextAttribute(con, background | color[level]);
fputs(str, stderr);
if (local_use_color)
SetConsoleTextAttribute(con, attr_orig);
} else {
ansi_fputs(level, tint, str, local_use_color);
}
#else
ansi_fputs(level, tint, str, local_use_color);
#endif