ref: allow to use shortened name when specifying -ref in command line

common/defaults.h

@@ -147,7 +147,7 @@ Default build-depended cvar and constant values
 #endif
 
 #ifndef DEFAULT_RENDERER
-	#define DEFAULT_RENDERER "ref_gl"
+	#define DEFAULT_RENDERER "gl"
 #endif
 
 #if TARGET_OS_IPHONE

engine/client/ref_common.c

@@ -481,21 +481,38 @@ void R_Shutdown( void )
 	ref.initialized = false;
 }
 
-qboolean R_Init( void )
+void R_GetRendererName( char *dest, size_t size, const char *refdll )
 {
-	char refdll[64];
+	Q_snprintf( dest, size, "%sref_%s.%s",
-
-	refdll[0] = 0;
-
-	if( !Sys_GetParmFromCmdLine( "-ref", refdll ) )
-	{
-		Q_snprintf( refdll, sizeof( refdll ), "%s%s.%s",
 #ifdef OS_LIB_PREFIX
-			OS_LIB_PREFIX,
+		OS_LIB_PREFIX,
 #else
-			"",
+		"",
 #endif
-			DEFAULT_RENDERER, OS_LIB_EXT );
+		refdll, OS_LIB_EXT );
+}
+
+qboolean R_Init( void )
+{
+	string refopt, refdll;
+
+	if( !Sys_GetParmFromCmdLine( "-ref", refopt ) )
+	{
+		// compile-time defaults
+		R_GetRendererName( refdll, sizeof( refdll ), DEFAULT_RENDERER );
+		Con_Printf( "Loading default renderer: %s\n", refdll );
+	}
+	else if( !Q_strstr( refopt, va( ".%s", OS_LIB_EXT ) ) )
+	{
+		// shortened renderer name
+		R_GetRendererName( refdll, sizeof( refdll ), refopt );
+		Con_Printf( "Loading renderer by short name: %s\n", refdll );
+	}
+	else
+	{
+		// full path
+		Q_strcpy( refdll, refopt );
+		Con_Printf( "Loading renderer: %s\n", refdll );
 	}
 
 	gl_vsync = Cvar_Get( "gl_vsync", "0", FCVAR_ARCHIVE,  "enable vertical syncronization" );