From 0aa8008f0a781cca60fbbf8fd4410056f0e4304b Mon Sep 17 00:00:00 2001
From: Julien Valentin <mp3butcher@hotmail.com>
Date: Sun, 21 Jan 2018 01:23:38 +0100
Subject: [PATCH 1/2] add a virtual getBufferData to Texture

---
 include/osg/Texture       | 3 +++
 include/osg/TextureBuffer | 6 +++---
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/include/osg/Texture b/include/osg/Texture
index a4f744f68..2376619c9 100644
--- a/include/osg/Texture
+++ b/include/osg/Texture
@@ -730,6 +730,8 @@ class OSG_EXPORT Texture : public osg::StateAttribute
         void setShadowAmbient(float shadow_ambient) { _shadow_ambient = shadow_ambient; }
         float getShadowAmbient() const { return _shadow_ambient; }
 
+        /** Gets the texture BufferData */
+        virtual const BufferData* getBufferData() const { return getImage(0); }
 
         /** Sets the texture image for the specified face. */
         virtual void setImage(unsigned int face, Image* image) = 0;
@@ -739,6 +741,7 @@ class OSG_EXPORT Texture : public osg::StateAttribute
         /** Gets the texture image for the specified face. */
         virtual Image* getImage(unsigned int face) = 0;
 
+
         /** Gets the const texture image for specified face. */
         virtual const Image* getImage(unsigned int face) const = 0;
 
diff --git a/include/osg/TextureBuffer b/include/osg/TextureBuffer
index 7a5c603c6..dcdeaf576 100644
--- a/include/osg/TextureBuffer
+++ b/include/osg/TextureBuffer
@@ -84,11 +84,11 @@ class OSG_EXPORT TextureBuffer : public Texture
         /** Bind the texture buffer.*/
         virtual void apply(State& state) const;
 
-        /**  Set setBufferData attached */
+        /**  Set BufferData attached */
         void setBufferData(BufferData *bo);
 
-         /**  Set setBufferData attached */
-        const BufferData * getBufferData()const {return _bufferData.get();}
+         /**  Get BufferData attached */
+        virtual const BufferData * getBufferData() const { return _bufferData.get(); }
     protected :
 
         virtual ~TextureBuffer();

From 588a9ae10d4ae54d39b4bfa69516ee434a1ad871 Mon Sep 17 00:00:00 2001
From: Julien Valentin <mp3butcher@hotmail.com>
Date: Sun, 21 Jan 2018 01:24:01 +0100
Subject: [PATCH 2/2] use introduced getBufferData to determine _target->apply
 requirements.

---
 src/osg/BindImageTexture.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/osg/BindImageTexture.cpp b/src/osg/BindImageTexture.cpp
index 592ffa2fb..d5a1361bf 100644
--- a/src/osg/BindImageTexture.cpp
+++ b/src/osg/BindImageTexture.cpp
@@ -19,8 +19,9 @@ void BindImageTexture::apply(osg::State&state) const
 {
     if(_target.valid())
     {
-        osg::Texture::TextureObject *to = _target->getTextureObject( state.getContextID() );
-        if( !to )
+        Texture::TextureObject *to = _target->getTextureObject( state.getContextID() );
+        GLBufferObject *globj = _target->getBufferData()->getBufferObject()->getGLBufferObject( state.getContextID() );
+        if( !globj || globj->isDirty() )
         {
             // _target never been applied yet
             _target->apply(state);