From 1784327c479d73b62623b151bb891e867422d816 Mon Sep 17 00:00:00 2001
From: Thomas Geymayer <tomgey@gmail.com>
Date: Fri, 15 Feb 2013 12:32:31 +0100
Subject: [PATCH] CanvasImage: Use image/canvas size rather than texture size

---
 simgear/canvas/elements/CanvasImage.cxx | 44 +++++++++++++++++--------
 1 file changed, 31 insertions(+), 13 deletions(-)

diff --git a/simgear/canvas/elements/CanvasImage.cxx b/simgear/canvas/elements/CanvasImage.cxx
index c41c4897..ee8f204b 100644
--- a/simgear/canvas/elements/CanvasImage.cxx
+++ b/simgear/canvas/elements/CanvasImage.cxx
@@ -324,24 +324,42 @@ namespace canvas
       _node_src_rect->setFloatValue("right", 1);
       _node_src_rect->setFloatValue("bottom", 1);
     }
+
+    if( !_region.width() || !_region.height() )
+    {
+      // Default to image size.
+      // TODO handle showing only part of image?
+      const SGRect<int>& dim = getTextureDimensions();
+      _node->setFloatValue("size[0]", dim.width());
+      _node->setFloatValue("size[1]", dim.height());
+    }
   }
 
   //----------------------------------------------------------------------------
   SGRect<int> Image::getTextureDimensions() const
   {
-    osg::Texture2D *texture = !_src_canvas.expired()
-                            ? _src_canvas.lock()->getTexture()
-                            : _texture.get();
-
-    if( !texture )
-      return SGRect<int>();
-
-    return SGRect<int>
-    (
-      0,0,
-      texture->getTextureWidth(),
-      texture->getTextureHeight()
-    );
+    CanvasPtr canvas = _src_canvas.lock();
+    SGRect<int> dim(0,0);
+
+    // Use canvas/image dimensions rather than texture dimensions, as they could
+    // be resized internally by OpenSceneGraph (eg. to nearest power of two).
+    if( canvas )
+    {
+      dim.setRight( canvas->getViewWidth() );
+      dim.setBottom( canvas->getViewHeight() );
+    }
+    else if( _texture )
+    {
+      osg::Image* img = _texture->getImage();
+
+      if( img )
+      {
+        dim.setRight( img->s() );
+        dim.setBottom( img->t() );
+      }
+    }
+
+    return dim;
   }
 
 } // namespace canvas
-- 
2.39.5