[util] Add DXVK_CONFIG to define additional options

src/util/config/config.cpp

@@ -1090,30 +1090,42 @@ namespace dxvk {
 
     // Load either $DXVK_CONFIG_FILE or $PWD/dxvk.conf
     std::string filePath = env::getEnvVar("DXVK_CONFIG_FILE");
+    std::string confLine = env::getEnvVar("DXVK_CONFIG");
 
     if (filePath == "")
       filePath = "dxvk.conf";
 
     // Open the file if it exists
     std::ifstream stream(str::topath(filePath.c_str()).c_str());
 
-    if (!stream)
+    if (!stream && confLine.empty())
       return config;
-
-    // Inform the user that we loaded a file, might
-    // help when debugging configuration issues
-    Logger::info(str::format("Found config file: ", filePath));
 
     // Initialize parser context
     ConfigContext ctx;
     ctx.active = true;
 
-    // Parse the file line by line
-    std::string line;
+    if (stream) {
+      // Inform the user that we loaded a file, might
+      // help when debugging configuration issues
+      Logger::info(str::format("Found config file: ", filePath));
+
+      // Parse the file line by line
+      std::string line;
+
+      while (std::getline(stream, line))
+        parseUserConfigLine(config, ctx, line);
+    }
+
+    if (!confLine.empty()) {
+      // Inform the user that we parsing config from environment, might
+      // help when debugging configuration issues
+      Logger::info(str::format("Found config env: ", confLine));
+
+      for(auto l : str::split(confLine, "#"))
+        parseUserConfigLine(config, ctx, std::string(l.data(), l.size()));
+    }
 
-    while (std::getline(stream, line))
-      parseUserConfigLine(config, ctx, line);
-
     return config;
   }