Added logging priorities and use SDLs logging facilities

By using SDL logging, we can rely on SDL to filter the log messages by
their priority before they get sent to our custom output function. For
example, we now no longer get entries for created and destroyed Window
instances by default, since these have only "debug" priority whereas the
default priority for the "app" category is "info".

We can also get log messages raised by SDL itself in our log now. Log
levels can be controlled per category through the "SDL_LOGGING"
environment variable.

Many existing log messages have been assigned a category based on their
existing prefix.

1 files changed, 8 insertions, 8 deletions

diff --git a/src/utils/xml.cpp b/src/utils/xml.cpp
index c408c9c2..34bcc52b 100644
--- a/src/utils/xml.cpp
+++ b/src/utils/xml.cpp
@@ -43,13 +43,13 @@ namespace XML
         auto *context = static_cast<XMLContext*>(ctx);
 
         if (context)
-            logger->log("Error in XML file '%s' on line %d",
-                        context->file.c_str(), error->line);
+            Log::info("Error in XML file '%s' on line %d",
+                      context->file.c_str(), error->line);
         else
-            logger->log("Error in unknown XML file on line %d",
-                        error->line);
+            Log::info("Error in unknown XML file on line %d",
+                      error->line);
 
-        logger->log("%s", error->message);
+        Log::info("%s", error->message);
 
         // No need to keep errors around
         xmlCtxtResetLastError(error->ctxt);
@@ -76,11 +76,11 @@ namespace XML
             SDL_free(data);
 
             if (!mDoc)
-                logger->log("Error parsing XML file %s", filename.c_str());
+                Log::info("Error parsing XML file %s", filename.c_str());
         }
         else
         {
-            logger->log("Error loading %s: %s", filename.c_str(), SDL_GetError());
+            Log::info("Error loading %s: %s", filename.c_str(), SDL_GetError());
         }
 
         xmlSetStructuredErrorFunc(nullptr, xmlLogger);
@@ -109,7 +109,7 @@ namespace XML
         mWriter = xmlNewTextWriterFilename(fileName.c_str(), 0);
         if (!mWriter)
         {
-            logger->log("Error creating XML writer for file %s", fileName.c_str());
+            Log::info("Error creating XML writer for file %s", fileName.c_str());
             return;
         }