From 64ac22f50c8c9779ecd073cdf9f34c0f6bd0dc7e Mon Sep 17 00:00:00 2001
From: Thomas Geymayer <tomgey@gmail.com>
Date: Sun, 27 Jul 2014 12:11:09 +0200
Subject: [PATCH] Canvas: warn for missing tff and png plugins.

---
 simgear/canvas/elements/CanvasImage.cxx | 4 ++++
 simgear/canvas/elements/CanvasText.cxx  | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/simgear/canvas/elements/CanvasImage.cxx b/simgear/canvas/elements/CanvasImage.cxx
index 20d19908..c7ca43d0 100644
--- a/simgear/canvas/elements/CanvasImage.cxx
+++ b/simgear/canvas/elements/CanvasImage.cxx
@@ -100,6 +100,10 @@ namespace canvas
     addStyle("preserveAspectRatio", "", &Image::setPreserveAspectRatio);
     addStyle("slice", "", &Image::setSlice);
     addStyle("slice-width", "", &Image::setSliceWidth);
+
+    osgDB::Registry* reg = osgDB::Registry::instance();
+    if( !reg->getReaderWriterForExtension("png") )
+      SG_LOG(SG_GL, SG_ALERT, "canvas::Image: Missing 'png' image reader");
   }
 
   //----------------------------------------------------------------------------
diff --git a/simgear/canvas/elements/CanvasText.cxx b/simgear/canvas/elements/CanvasText.cxx
index 6ef37819..ebe76d41 100644
--- a/simgear/canvas/elements/CanvasText.cxx
+++ b/simgear/canvas/elements/CanvasText.cxx
@@ -21,6 +21,7 @@
 #include <simgear/canvas/CanvasSystemAdapter.hxx>
 #include <simgear/scene/util/parse_color.hxx>
 #include <osg/Version>
+#include <osgDB/Registry>
 #include <osgText/Text>
 
 namespace simgear
@@ -582,6 +583,10 @@ namespace canvas
     addStyle("font", "", &Text::setFont);
     addStyle("alignment", "", &Text::setAlignment);
     addStyle("text", "", &Text::setText, false);
+
+    osgDB::Registry* reg = osgDB::Registry::instance();
+    if( !reg->getReaderWriterForExtension("ttf") )
+      SG_LOG(SG_GL, SG_ALERT, "canvas::Text: Missing 'ttf' font reader");
   }
 
   //----------------------------------------------------------------------------
-- 
2.39.5