From 079cf6c090958ef62edb21f6605159666246835b Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Fri, 12 Jul 2019 16:09:12 +0100
Subject: [PATCH] Added FrameBufferAttachment::resizeGLObjectBuffers(..) and
 releaseGLObjects(..) methods

---
 include/osg/FrameBufferObject |  3 +++
 src/osg/FrameBufferObject.cpp | 22 ++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/include/osg/FrameBufferObject b/include/osg/FrameBufferObject
index 8ca508a37..9bcb8e8ed 100644
--- a/include/osg/FrameBufferObject
+++ b/include/osg/FrameBufferObject
@@ -304,6 +304,9 @@ class OSG_EXPORT FrameBufferAttachment
         unsigned int getTexture3DZOffset() const;
         unsigned int getTextureArrayLayer() const;
 
+        void resizeGLObjectBuffers(unsigned int maxSize);
+        void releaseGLObjects(osg::State* = 0) const;
+
     private:
         // use the Pimpl idiom to avoid dependency from
         // all Texture* headers
diff --git a/src/osg/FrameBufferObject.cpp b/src/osg/FrameBufferObject.cpp
index cb79979ba..c3988e067 100644
--- a/src/osg/FrameBufferObject.cpp
+++ b/src/osg/FrameBufferObject.cpp
@@ -565,6 +565,18 @@ unsigned int FrameBufferAttachment::getTextureArrayLayer() const
     return _ximpl->zoffset;
 }
 
+void FrameBufferAttachment::resizeGLObjectBuffers(unsigned int maxSize)
+{
+    if (_ximpl->renderbufferTarget.valid()) _ximpl->renderbufferTarget->resizeGLObjectBuffers(maxSize);
+    if (_ximpl->textureTarget.valid()) _ximpl->textureTarget->resizeGLObjectBuffers(maxSize);
+}
+
+void FrameBufferAttachment::releaseGLObjects(osg::State* state) const
+{
+    if (_ximpl->renderbufferTarget.valid()) _ximpl->renderbufferTarget->releaseGLObjects(state);
+    if (_ximpl->textureTarget.valid()) _ximpl->textureTarget->releaseGLObjects(state);
+}
+
 /**************************************************************************
  * FrameBufferObject
  **************************************************************************/
@@ -594,6 +606,11 @@ void FrameBufferObject::resizeGLObjectBuffers(unsigned int maxSize)
     _fboID.resize(maxSize);
     _unsupported.resize(maxSize);
     _fboID.resize(maxSize);
+
+    for(AttachmentMap::iterator itr = _attachments.begin(); itr != _attachments.end(); ++itr)
+    {
+        itr->second.resizeGLObjectBuffers(maxSize);
+    }
 }
 
 void FrameBufferObject::releaseGLObjects(osg::State* state) const
@@ -618,6 +635,11 @@ void FrameBufferObject::releaseGLObjects(osg::State* state) const
             }
         }
     }
+
+    for(AttachmentMap::const_iterator itr = _attachments.begin(); itr != _attachments.end(); ++itr)
+    {
+        itr->second.releaseGLObjects(state);
+    }
 }
 
 void FrameBufferObject::setAttachment(BufferComponent attachment_point, const FrameBufferAttachment &attachment)