From bc76fbf60d2ba79c064fc5518bfe75fe55a68f90 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 15 Jun 2005 20:05:47 +0000
Subject: [PATCH] Added automatic creation of texture when size is set but not
 osg::Image is assigned. This is useful for FBO usage.

---
 src/osg/Texture2D.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/osg/Texture2D.cpp b/src/osg/Texture2D.cpp
index d1e04cdf7..e8f125be1 100644
--- a/src/osg/Texture2D.cpp
+++ b/src/osg/Texture2D.cpp
@@ -206,6 +206,22 @@ void Texture2D::apply(State& state) const
         //glBindTexture( GL_TEXTURE_2D, handle );
         
     }
+    else if ( (_textureWidth!=0) && (_textureHeight!=0) && (_internalFormat!=0) )
+    {
+        _textureObjectBuffer[contextID] = textureObject = generateTextureObject(
+                contextID,GL_TEXTURE_2D,_numMipmapLevels,_internalFormat,_textureWidth,_textureHeight,1,0);
+        
+        textureObject->bind();
+
+        applyTexParameters(GL_TEXTURE_2D,state);
+
+        // no image present, but dimensions at set so less create the texture
+        glTexImage2D( GL_TEXTURE_2D, 0, _internalFormat,
+                     _textureWidth, _textureHeight, _borderWidth,
+                     _internalFormat,
+                     GL_UNSIGNED_BYTE,
+                     0);                
+    }
     else
     {
         glBindTexture( GL_TEXTURE_2D, 0 );