client: add cvar to set console background color (incl. alpha)

* Added con_background cvar to set solid color for console background.

src/client/cl_console.c

@@ -47,6 +47,7 @@ console_t con;
 cvar_t *con_notifytime;
 cvar_t *con_openspeed;
 cvar_t *con_autoclear;
+cvar_t *con_background;
 
 vec4_t console_highlightcolor = { 0.5f, 0.5f, 0.2f, 0.45f };
 
@@ -321,6 +322,7 @@ void Con_Init(void)
 	con_notifytime = Cvar_Get("con_notifytime", "7", 0); // increased per id req for obits
 	con_openspeed  = Cvar_Get("con_openspeed", "3", 0);
 	con_autoclear  = Cvar_Get("con_autoclear", "1", CVAR_ARCHIVE);
+	con_background = Cvar_GetAndDescribe("con_background", "", CVAR_ARCHIVE, "Console background color in normalized RGBA format, eg. \"0.2 0.2 0.2 0.8\".");
 
 	Field_Clear(&g_consoleField);
 	g_consoleField.widthInChars = g_console_field_width;
@@ -750,8 +752,14 @@ void Con_DrawSolidConsole(float frac)
 	}
 	else
 	{
-		SCR_DrawPic(0, 0, SCREEN_WIDTH, y, cls.consoleShader);
-
+		if (Q_ParseColorRGBA(con_background->string, color)) 
+		{
+			SCR_FillRect(0, 0, SCREEN_WIDTH, y, color);
+		} 
+		else 
+		{
+			SCR_DrawPic(0, 0, SCREEN_WIDTH, y, cls.consoleShader);
+		}
 		/*
 		// draw the logo
 		if (frac >= 0.5f)

src/qcommon/q_shared.c

@@ -1856,6 +1856,32 @@ void Q_ColorizeString(char colorCode, const char *inStr, char *outStr, size_t ou
 	}
 }
 
+/**
+ * @brief Parses normalized RGBA color string
+ * @param[in] inStr input string to parse
+ * @param[out] outColor output vector to set
+ * @return Number of matched color components in the input string
+ */
+int Q_ParseColorRGBA(const char *inStr, vec4_t outColor)
+{
+	float r = 0.0f;
+	float g = 0.0f;
+	float b = 0.0f;
+	float a = 1.0f;
+	int components;
+
+	if (!inStr || !inStr[0] || !outColor) 
+	{
+		return 0;
+	}
+
+	components = sscanf(inStr, "%f %f %f %f", &r, &g, &b, &a);
+	Vector4Set(outColor, r, g, b, a);
+	ClampColor(outColor);
+
+	return components;
+}
+
 /**
  * @brief Strips whitespaces and bad characters
  * @param[in] c

src/qcommon/q_shared.h

@@ -824,6 +824,9 @@ char *Q_TrimStr(char *string);
 /// Encodes a plain un-colored string so that it'll be drawn with the given color code.
 void Q_ColorizeString(char colorCode, const char *inStr, char *outStr, size_t outBufferLen);
 
+// Parses normalized rgba color string
+int Q_ParseColorRGBA(const char *inStr, vec4_t outColor);
+
 // #define Q_IsColorString(p) (*p == Q_COLOR_ESCAPE && *(p + 1) && *(p + 1) != Q_COLOR_ESCAPE && isgraph((*(p + 1))))
 // Checks if the string contains color coded text
 static ID_INLINE qboolean Q_IsColorString(const char *p)