Linux: Add color output for console

Usecase: show map name on level load.

Add colorterminal cvar for disable.

xfce4-terminal has:
 * TERM=xterm-256color
 * COLORTERM=truecolor

src/backends/unix/system.c

@@ -53,6 +53,9 @@ static void *game_library;
 // Evil hack to determine if stdin is available
 qboolean stdin_active = true;
 
+// Terminal supports colors
+static qboolean color_active = false;
+
 // Config dir
 char cfgdir[MAX_OSPATH] = CFGDIR;
 
@@ -107,6 +110,37 @@ Sys_Quit(void)
 void
 Sys_Init(void)
 {
+	char *envvar;
+
+	envvar = getenv("TERM");
+	if (envvar && strstr(envvar, "color"))
+	{
+		char buf[256];
+
+		color_active = true;
+
+		snprintf(buf, sizeof(buf),
+			"\2Terminal supports colors: TERM='%s'\n", envvar);
+
+		Sys_ConsoleOutput(buf);
+		return;
+	}
+
+	envvar = getenv("COLORTERM");
+	if (envvar && strlen(envvar))
+	{
+		char buf[256];
+		color_active = true;
+
+		snprintf(buf, sizeof(buf),
+			"\2Terminal supports colors: COLORTERM='%s'\n", envvar);
+
+		Sys_ConsoleOutput(buf);
+		return;
+	}
+
+	Sys_ConsoleOutput("Terminal has no colors support.\n");
+
 }
 
 /* ================================================================ */
@@ -160,6 +194,29 @@ Sys_ConsoleInput(void)
 void
 Sys_ConsoleOutput(char *string)
 {
+	if ((string[0] == 0x01) || (string[0] == 0x02))
+	{
+		if (color_active)
+		{
+			if (string[0] == 0x01)
+			{
+				/* red */
+				fputs("\033[40m\033[31;1m", stdout);
+			}
+			else
+			{
+				/* green */
+				fputs("\033[40m\033[32;1m", stdout);
+			}
+
+			fputs(string + 1, stdout);
+
+			/* back to black */
+			fputs("\033[40m\033[37;1m", stdout);
+			return;
+		}
+	}
+
 	fputs(string, stdout);
 }
 

src/backends/windows/system.c

@@ -236,6 +236,12 @@ Sys_ConsoleOutput(char *string)
 	char text[256];
 	DWORD dummy;
 
+	if ((string[0] == 0x01) || (string[0] == 0x02))
+	{
+		// remove color marker
+		string[0] = ' ';
+	}
+
 	if (!dedicated || !dedicated->value)
 	{
 		fputs(string, stdout);

src/common/clientserver.c

@@ -34,6 +34,7 @@ FILE *logfile;
 cvar_t *logfile_active;  /* 1 = buffer log, 2 = flush after each print */
 jmp_buf abortframe; /* an ERR_DROP occured, exit the entire frame */
 int server_state;
+cvar_t *color_terminal;
 
 static int rd_target;
 static char *rd_buffer;
@@ -105,10 +106,22 @@ Com_VPrintf(int print_level, const char *fmt, va_list argptr)
 		Con_Print(msg);
 	#endif
 
+		if ((msg[0] == 0x01 || msg[0] == 0x02) &&
+		    color_terminal && color_terminal->value)
+		{
+			// skip color marker
+			i = 1;
+		}
+		else
+		{
+			i = 0;
+		}
+
 		// remove unprintable characters
-		for(i=0; i<msgLen; ++i)
+		for(; i<msgLen; ++i)
 		{
 			char c = msg[i];
+
 			if(c < ' ' && (c < '\t' || c > '\r'))
 			{
 				switch(c)
@@ -143,6 +156,12 @@ Com_VPrintf(int print_level, const char *fmt, va_list argptr)
 		{
 			char name[MAX_OSPATH];
 
+			if ((msg[0] == 0x01) || (msg[0] == 0x02))
+			{
+				// remove color marker
+				msg[0] = ' ';
+			}
+
 			if (!logfile)
 			{
 				Com_sprintf(name, sizeof(name), "%s/qconsole.log", FS_Gamedir());

src/common/frame.c

@@ -35,6 +35,7 @@ cvar_t *fixedtime;
 cvar_t *cl_maxfps;
 cvar_t *dedicated;
 
+extern cvar_t *color_terminal;
 extern cvar_t *logfile_active;
 extern jmp_buf abortframe; /* an ERR_DROP occured, exit the entire frame */
 extern zhead_t z_chain;
@@ -353,6 +354,7 @@ Qcommon_Init(int argc, char **argv)
 	developer = Cvar_Get("developer", "0", 0);
 	fixedtime = Cvar_Get("fixedtime", "0", 0);
 
+	color_terminal = Cvar_Get("colorterminal", "1", CVAR_ARCHIVE);
 	logfile_active = Cvar_Get("logfile", "1", CVAR_ARCHIVE);
 	modder = Cvar_Get("modder", "0", 0);
 	timescale = Cvar_Get("timescale", "1", 0);